diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE/Bug_report.md
similarity index 81%
rename from .github/ISSUE_TEMPLATE.md
rename to .github/ISSUE_TEMPLATE/Bug_report.md
index a3140bc1..177a4b39 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE/Bug_report.md
@@ -1,22 +1,19 @@
-**Bug Report**
-
-- What is the issue you have?
-
-- Please describe the steps to reproduce the issue. Can you provide a small but working code example?
-
-- What is the expected behavior?
-
-- And what is the actual behavior instead?
-
-- Which compiler and operating system are you using? Is it a [supported compiler](https://github.com/nlohmann/json#supported-compilers)?
-
-- Did you use a released version of the library or the version from the `develop` branch?
-
-- If you experience a compilation error: can you [compile and run the unit tests](https://github.com/nlohmann/json#execute-unit-tests)?
-
-
-**Feature Request**
-
-- Describe the feature in as much detail as possible.
-
-- Include sample usage where appropriate.
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+- What is the issue you have?
+
+- Please describe the steps to reproduce the issue. Can you provide a small but working code example?
+
+- What is the expected behavior?
+
+- And what is the actual behavior instead?
+
+- Which compiler and operating system are you using? Is it a [supported compiler](https://github.com/nlohmann/json#supported-compilers)?
+
+- Did you use a released version of the library or the version from the `develop` branch?
+
+- If you experience a compilation error: can you [compile and run the unit tests](https://github.com/nlohmann/json#execute-unit-tests)?
diff --git a/.github/ISSUE_TEMPLATE/Feature_request.md b/.github/ISSUE_TEMPLATE/Feature_request.md
new file mode 100644
index 00000000..f5ea57ca
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/Feature_request.md
@@ -0,0 +1,9 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+- Describe the feature in as much detail as possible.
+
+- Include sample usage where appropriate.
diff --git a/.travis.yml b/.travis.yml
index 8ce38cc8..e5f08353 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -155,6 +155,12 @@ matrix:
   - os: osx
     osx_image: xcode9.2
 
+  - os: osx
+    osx_image: xcode9.3
+
+  - os: osx
+    osx_image: xcode9.4
+
   # Linux / GCC
 
   - os: linux
@@ -189,15 +195,23 @@ matrix:
         sources: ['ubuntu-toolchain-r-test']
         packages: ['g++-7', 'ninja-build']
 
+  - os: linux
+    compiler: gcc
+    env: COMPILER=g++-8
+    addons:
+      apt:
+        sources: ['ubuntu-toolchain-r-test']
+        packages: ['g++-8', 'ninja-build']
+
   - os: linux
     compiler: gcc
     env:
-      - COMPILER=g++-7
+      - COMPILER=g++-8
       - CXXFLAGS=-std=c++17
     addons:
       apt:
         sources: ['ubuntu-toolchain-r-test']
-        packages: ['g++-7', 'ninja-build']
+        packages: ['g++-8', 'ninja-build']
 
   # Linux / Clang
 
@@ -257,15 +271,23 @@ matrix:
         sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-5.0']
         packages: ['g++-6', 'clang-5.0', 'ninja-build']
 
+  - os: linux
+    compiler: clang
+    env: COMPILER=clang++-6.0
+    addons:
+      apt:
+        sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-6.0']
+        packages: ['g++-6', 'clang-6.0', 'ninja-build']
+
   - os: linux
     compiler: clang
     env:
-      - COMPILER=clang++-5.0
+      - COMPILER=clang++-6.0
       - CXXFLAGS=-std=c++1z
     addons:
       apt:
-        sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-5.0']
-        packages: ['g++-6', 'clang-5.0', 'ninja-build']
+        sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-6.0']
+        packages: ['g++-6', 'clang-6.0', 'ninja-build']
 
 ################
 # build script #
@@ -277,6 +299,7 @@ script:
      if [[ (-x $(which brew)) ]]; then
        brew update
        brew install cmake ninja
+       brew upgrade cmake
        cmake --version
      fi
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c0acc750..b345c77a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,10 @@
-cmake_minimum_required(VERSION 3.0.0)
+cmake_minimum_required(VERSION 3.8)
 
 ##
 ## PROJECT
 ## name and version
 ##
-project(nlohmann_json VERSION 3.1.2 LANGUAGES CXX)
+project(nlohmann_json VERSION 3.2.0 LANGUAGES CXX)
 
 ##
 ## INCLUDE
@@ -22,13 +22,15 @@ option(JSON_MultipleHeaders "Use non-amalgamated version of the library." OFF)
 ## CONFIGURATION
 ##
 set(NLOHMANN_JSON_TARGET_NAME               ${PROJECT_NAME})
-set(NLOHMANN_JSON_CONFIG_INSTALL_DIR        "lib/cmake/${PROJECT_NAME}")
+set(NLOHMANN_JSON_CONFIG_INSTALL_DIR        "lib/cmake/${PROJECT_NAME}"
+  CACHE INTERNAL "")
 set(NLOHMANN_JSON_INCLUDE_INSTALL_DIR       "include")
 set(NLOHMANN_JSON_TARGETS_EXPORT_NAME       "${PROJECT_NAME}Targets")
 set(NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE     "cmake/config.cmake.in")
-set(NLOHMANN_JSON_CMAKE_CONFIG_DIR          "${CMAKE_CURRENT_BINARY_DIR}/cmake_config")
+set(NLOHMANN_JSON_CMAKE_CONFIG_DIR          "${CMAKE_CURRENT_BINARY_DIR}")
 set(NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
 set(NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Config.cmake")
+set(NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE "${NLOHMANN_JSON_CMAKE_CONFIG_DIR}/${PROJECT_NAME}Targets.cmake")
 
 if (JSON_MultipleHeaders)
     set(NLOHMANN_JSON_INCLUDE_BUILD_DIR "${PROJECT_SOURCE_DIR}/include/")
@@ -43,6 +45,8 @@ endif()
 ## create target and add include path
 ##
 add_library(${NLOHMANN_JSON_TARGET_NAME} INTERFACE)
+add_library(${PROJECT_NAME}::${NLOHMANN_JSON_TARGET_NAME} ALIAS ${NLOHMANN_JSON_TARGET_NAME})
+target_compile_features(${NLOHMANN_JSON_TARGET_NAME} INTERFACE cxx_std_11)
 
 target_include_directories(
     ${NLOHMANN_JSON_TARGET_NAME}
@@ -51,8 +55,8 @@ target_include_directories(
     $<INSTALL_INTERFACE:include>
 )
 
-## add debug view defintion file for msvc (natvis) [cmake <= 3.2.2 does not support export of source files]
-if (MSVC AND CMAKE_VERSION VERSION_GREATER "3.2.2")
+## add debug view definition file for msvc (natvis)
+if (MSVC)
     set(NLOHMANN_ADD_NATVIS TRUE)
     set(NLOHMANN_NATVIS_FILE "nlohmann_json.natvis")
     target_sources(
@@ -62,7 +66,7 @@ if (MSVC AND CMAKE_VERSION VERSION_GREATER "3.2.2")
             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/${NLOHMANN_NATVIS_FILE}>  
     )
 endif()
-           
+
 ##
 ## TESTS
 ## create and configure the unit test target
@@ -102,6 +106,11 @@ if (NLOHMANN_ADD_NATVIS)
         DESTINATION .
 )
 endif()
+export(
+    TARGETS ${NLOHMANN_JSON_TARGET_NAME}
+    NAMESPACE ${PROJECT_NAME}::
+    FILE ${NLOHMANN_JSON_CMAKE_PROJECT_TARGETS_FILE}
+)
 install(
     TARGETS ${NLOHMANN_JSON_TARGET_NAME}
     EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}
@@ -109,5 +118,6 @@ install(
 )
 install(
     EXPORT ${NLOHMANN_JSON_TARGETS_EXPORT_NAME}
+    NAMESPACE ${PROJECT_NAME}::
     DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
 )
diff --git a/ChangeLog.md b/ChangeLog.md
index ea48332e..0c6cc009 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,186 @@
 # Change Log
 All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [v3.2.0](https://github.com/nlohmann/json/releases/tag/v3.2.0) (2018-08-18)
+[Full Changelog](https://github.com/nlohmann/json/compare/v3.1.2...v3.2.0)
+
+- Am I doing this wrong? Getting an empty string [\#1199](https://github.com/nlohmann/json/issues/1199)
+- Incompatible Pointer Type [\#1196](https://github.com/nlohmann/json/issues/1196)
+- json.exception.type\_error.316 [\#1195](https://github.com/nlohmann/json/issues/1195)
+- Strange warnings in Code::Blocks 17.12, GNU GCC [\#1192](https://github.com/nlohmann/json/issues/1192)
+- \[Question\] Current place in code to change floating point resolution [\#1191](https://github.com/nlohmann/json/issues/1191)
+- Add key name when throwing type error [\#1189](https://github.com/nlohmann/json/issues/1189)
+- Not able to include in visual studio code? [\#1188](https://github.com/nlohmann/json/issues/1188)
+- Get an Index or row number of an element [\#1186](https://github.com/nlohmann/json/issues/1186)
+- reduce repos size [\#1185](https://github.com/nlohmann/json/issues/1185)
+- Difference between `merge\_patch` and `update` [\#1183](https://github.com/nlohmann/json/issues/1183)
+- Is there a way to get an element from a JSON without throwing an exception on failure? [\#1182](https://github.com/nlohmann/json/issues/1182)
+- to\_string? [\#1181](https://github.com/nlohmann/json/issues/1181)
+- How to cache a json object's pointer into a map? [\#1180](https://github.com/nlohmann/json/issues/1180)
+- Can this library work within a Qt project for Android using Qt Creator? [\#1178](https://github.com/nlohmann/json/issues/1178)
+- How to get all keys of one object? [\#1177](https://github.com/nlohmann/json/issues/1177)
+- How can I only parse the first level and get the value as string? [\#1175](https://github.com/nlohmann/json/issues/1175)
+- I have a query regarding nlohmann::basic\_json::basic\_json [\#1174](https://github.com/nlohmann/json/issues/1174)
+- unordered\_map with vectors won't convert to json? [\#1173](https://github.com/nlohmann/json/issues/1173)
+- return json objects from functions [\#1172](https://github.com/nlohmann/json/issues/1172)
+- Problem when exporting to CBOR [\#1171](https://github.com/nlohmann/json/issues/1171)
+- Roundtripping null to nullptr does not work [\#1169](https://github.com/nlohmann/json/issues/1169)
+- MSVC fails to compile std::swap specialization for nlohmann::json [\#1168](https://github.com/nlohmann/json/issues/1168)
+- Unexpected behaviour of is\_null - Part II [\#1167](https://github.com/nlohmann/json/issues/1167)
+- Floating point imprecision [\#1166](https://github.com/nlohmann/json/issues/1166)
+- Combine json objects into one? [\#1165](https://github.com/nlohmann/json/issues/1165)
+- Is there any way to know if the object has changed? [\#1164](https://github.com/nlohmann/json/issues/1164)
+- Value throws on null string [\#1163](https://github.com/nlohmann/json/issues/1163)
+- Weird template issue in large project [\#1162](https://github.com/nlohmann/json/issues/1162)
+- \_json returns a different result vs ::parse [\#1161](https://github.com/nlohmann/json/issues/1161)
+- Showing difference between two json objects [\#1160](https://github.com/nlohmann/json/issues/1160)
+- no instance of overloaded function "std::swap" matches the specified type	 [\#1159](https://github.com/nlohmann/json/issues/1159)
+- resize\(...\)? [\#1157](https://github.com/nlohmann/json/issues/1157)
+- Issue with struct nested in class' to\_json [\#1155](https://github.com/nlohmann/json/issues/1155)
+- Deserialize std::map with std::nan [\#1154](https://github.com/nlohmann/json/issues/1154)
+- Parse throwing errors [\#1149](https://github.com/nlohmann/json/issues/1149)
+- cocoapod integration [\#1148](https://github.com/nlohmann/json/issues/1148)
+- wstring parsing [\#1147](https://github.com/nlohmann/json/issues/1147)
+- Is it possible to dump a two-dimensional array to "\[\[null\],\[1,2,3\]\]"? [\#1146](https://github.com/nlohmann/json/issues/1146)
+- Want to write a class member variable and a struct variable \( this structure is inside the class\) to the json file [\#1145](https://github.com/nlohmann/json/issues/1145)
+- Does json support converting an instance of a struct into json string? [\#1143](https://github.com/nlohmann/json/issues/1143)
+- \#Most efficient way to search for child parameters \(recursive find?\) [\#1141](https://github.com/nlohmann/json/issues/1141)
+-  could not find to\_json\(\) method in T's namespace [\#1140](https://github.com/nlohmann/json/issues/1140)
+- chars get treated as JSON numbers not JSON strings [\#1139](https://github.com/nlohmann/json/issues/1139)
+- How do I count number of objects in array? [\#1137](https://github.com/nlohmann/json/issues/1137)
+- Serializing a vector of classes? [\#1136](https://github.com/nlohmann/json/issues/1136)
+- Compile error. Unable convert form nullptr to nullptr&& [\#1135](https://github.com/nlohmann/json/issues/1135)
+- std::unordered\_map in struct, serialization [\#1133](https://github.com/nlohmann/json/issues/1133)
+- dump\(\) can't handle umlauts [\#1131](https://github.com/nlohmann/json/issues/1131)
+- Add a way to get a key reference from the iterator [\#1127](https://github.com/nlohmann/json/issues/1127)
+- can't not parse "\\“ string [\#1123](https://github.com/nlohmann/json/issues/1123)
+-  if  json file  contain Internationalization   chars   ,  get  exception [\#1122](https://github.com/nlohmann/json/issues/1122)
+- How to use a json::iterator dereferenced value in code? [\#1120](https://github.com/nlohmann/json/issues/1120)
+- clang compiler: error : unknown type name 'not' [\#1119](https://github.com/nlohmann/json/issues/1119)
+- Disable implicit conversions from json to std::initializer\_list\<T\> for any T [\#1118](https://github.com/nlohmann/json/issues/1118)
+- Implicit conversions to complex types can lead to surprising and confusing errors [\#1116](https://github.com/nlohmann/json/issues/1116)
+- How can I write from\_json for a complex datatype that is not default constructible? [\#1115](https://github.com/nlohmann/json/issues/1115)
+- Compile error in VS2015 when compiling unit-conversions.cpp [\#1114](https://github.com/nlohmann/json/issues/1114)
+- ADL Serializer for std::any / boost::any [\#1113](https://github.com/nlohmann/json/issues/1113)
+- Unexpected behaviour of is\_null [\#1112](https://github.com/nlohmann/json/issues/1112)
+- How to resolve  " undefined reference to `std::\_\_throw\_bad\_cast\(\)'" [\#1111](https://github.com/nlohmann/json/issues/1111)
+- cannot compile on ubuntu 18.04 and 16.04 [\#1110](https://github.com/nlohmann/json/issues/1110)
+- JSON representation for floating point values has too many digits [\#1109](https://github.com/nlohmann/json/issues/1109)
+- Not working for classes containing "\_declspec\(dllimport\)" in their declaration [\#1108](https://github.com/nlohmann/json/issues/1108)
+- Get keys from json object [\#1107](https://github.com/nlohmann/json/issues/1107)
+- dump\(\) without alphabetical order [\#1106](https://github.com/nlohmann/json/issues/1106)
+- Cannot deserialize types using std::ratio [\#1105](https://github.com/nlohmann/json/issues/1105)
+-  i want to learn json [\#1104](https://github.com/nlohmann/json/issues/1104)
+- Type checking during compile [\#1103](https://github.com/nlohmann/json/issues/1103)
+- Iterate through sub items [\#1102](https://github.com/nlohmann/json/issues/1102)
+- cppcheck failing for version 3.1.2 [\#1101](https://github.com/nlohmann/json/issues/1101)
+- Deserializing std::map [\#1100](https://github.com/nlohmann/json/issues/1100)
+- accessing key by reference [\#1098](https://github.com/nlohmann/json/issues/1098)
+- clang 3.8.0 croaks while trying to compile with debug symbols [\#1097](https://github.com/nlohmann/json/issues/1097)
+- Serialize a list of class objects with json [\#1096](https://github.com/nlohmann/json/issues/1096)
+- Null bytes in files are treated like EOF [\#1095](https://github.com/nlohmann/json/issues/1095)
+- Small question [\#1094](https://github.com/nlohmann/json/issues/1094)
+- Upgrading to 3.x: to\_/from\_json with enum class [\#1093](https://github.com/nlohmann/json/issues/1093)
+- Q: few questions about json construction [\#1092](https://github.com/nlohmann/json/issues/1092)
+- general crayCC compilation failure [\#1091](https://github.com/nlohmann/json/issues/1091)
+- Merge Patch clears original data [\#1090](https://github.com/nlohmann/json/issues/1090)
+- \[Question\] how to use nlohmann/json in c++? [\#1088](https://github.com/nlohmann/json/issues/1088)
+- C++17 decomposition declaration support [\#1087](https://github.com/nlohmann/json/issues/1087)
+- \[Question\] Access multi-level json objects [\#1086](https://github.com/nlohmann/json/issues/1086)
+- Serializing vector [\#1085](https://github.com/nlohmann/json/issues/1085)
+- update nested value in multi hierarchy json object [\#1084](https://github.com/nlohmann/json/issues/1084)
+- Overriding default values? [\#1083](https://github.com/nlohmann/json/issues/1083)
+- detail namespace collision with Cereal? [\#1082](https://github.com/nlohmann/json/issues/1082)
+- Error using json.dump\(\); [\#1081](https://github.com/nlohmann/json/issues/1081)
+- Consuming TCP Stream [\#1080](https://github.com/nlohmann/json/issues/1080)
+- Compilation error with strong typed enums in map in combination with namespaces [\#1079](https://github.com/nlohmann/json/issues/1079)
+- cassert error [\#1076](https://github.com/nlohmann/json/issues/1076)
+- Valid json data not being parsed [\#1075](https://github.com/nlohmann/json/issues/1075)
+- Feature request :: Better testing for key existance without try/catch [\#1074](https://github.com/nlohmann/json/issues/1074)
+- Hi, I have input like a.b.c and want to convert it to \"a\"{\"b\": \"c\"} form. Any suggestions how do I do this? Thanks. [\#1073](https://github.com/nlohmann/json/issues/1073)
+- ADL deserializer not picked up for non default-constructible type [\#1072](https://github.com/nlohmann/json/issues/1072)
+- Deserializing std::array doesn't compiler \(no insert\(\)\) [\#1071](https://github.com/nlohmann/json/issues/1071)
+- Serializing OpenCV Mat problem [\#1070](https://github.com/nlohmann/json/issues/1070)
+- Compilation error with ICPC compiler [\#1068](https://github.com/nlohmann/json/issues/1068)
+- Minimal branch? [\#1066](https://github.com/nlohmann/json/issues/1066)
+- Not existing value, crash [\#1065](https://github.com/nlohmann/json/issues/1065)
+- cyryllic symbols [\#1064](https://github.com/nlohmann/json/issues/1064)
+- newbie usage question [\#1063](https://github.com/nlohmann/json/issues/1063)
+- Trying j\["strTest"\] = "%A" produces "strTest": "-0X1.CCCCCCCCCCCCCP+205" [\#1062](https://github.com/nlohmann/json/issues/1062)
+- convert json value to std::string??? [\#1061](https://github.com/nlohmann/json/issues/1061)
+- Commented out test cases, should they be removed? [\#1060](https://github.com/nlohmann/json/issues/1060)
+- different behaviour between clang and gcc with braced initialization [\#1059](https://github.com/nlohmann/json/issues/1059)
+- json array:  initialize with prescribed size and `resize` method. [\#1057](https://github.com/nlohmann/json/issues/1057)
+- Is it possible to use exceptions istead of assertions? [\#1056](https://github.com/nlohmann/json/issues/1056)
+- when using assign operator in with json object a static assertion fails.. [\#1055](https://github.com/nlohmann/json/issues/1055)
+- Iterate over leafs of a JSON data structure: enrich the JSON pointer API [\#1054](https://github.com/nlohmann/json/issues/1054)
+- \[Feature request\] Access by path [\#1053](https://github.com/nlohmann/json/issues/1053)
+- document that implicit js -\> primitive conversion does not work for std::string::value\_type and why [\#1052](https://github.com/nlohmann/json/issues/1052)
+- error: ‘BasicJsonType’ in namespace ‘::’ does not name a type [\#1051](https://github.com/nlohmann/json/issues/1051)
+- Destructor is called when filling object through assignement [\#1050](https://github.com/nlohmann/json/issues/1050)
+- Is this thing thread safe for reads? [\#1049](https://github.com/nlohmann/json/issues/1049)
+- clang-tidy: Call to virtual function during construction  [\#1046](https://github.com/nlohmann/json/issues/1046)
+- Using STL algorithms with JSON containers with expected results? [\#1045](https://github.com/nlohmann/json/issues/1045)
+- Usage with gtest/gmock not working as expected [\#1044](https://github.com/nlohmann/json/issues/1044)
+- Consequences of from\_json / to\_json being in namespace of data struct. [\#1042](https://github.com/nlohmann/json/issues/1042)
+- const\_reference operator\[\]\(const typename object\_t::key\_type& key\) const throw instead of assert [\#1039](https://github.com/nlohmann/json/issues/1039)
+- Trying to retrieve data from nested objects [\#1038](https://github.com/nlohmann/json/issues/1038)
+- Direct download link for json\_fwd.hpp? [\#1037](https://github.com/nlohmann/json/issues/1037)
+- I know the library supports UTF-8, but failed to dump the value [\#1036](https://github.com/nlohmann/json/issues/1036)
+- Putting a Vec3-like vector into a json object [\#1035](https://github.com/nlohmann/json/issues/1035)
+- Ternary operator crash [\#1034](https://github.com/nlohmann/json/issues/1034)
+- Issued with Clion Inspection Resolution since 2018.1 [\#1033](https://github.com/nlohmann/json/issues/1033)
+- Some testcases fail and one never finishes [\#1032](https://github.com/nlohmann/json/issues/1032)
+- Can this class work with wchar\_t / std::wstring? [\#1031](https://github.com/nlohmann/json/issues/1031)
+- Makefile: Valgrind flags have no effect [\#1030](https://github.com/nlohmann/json/issues/1030)
+- 「==」 Should be 「\>」 [\#1029](https://github.com/nlohmann/json/issues/1029)
+- HOCON reader? [\#1027](https://github.com/nlohmann/json/issues/1027)
+- add json string in previous string?? [\#1025](https://github.com/nlohmann/json/issues/1025)
+- RFC: fluent parsing interface [\#1023](https://github.com/nlohmann/json/issues/1023)
+- Does it support chinese character? [\#1022](https://github.com/nlohmann/json/issues/1022)
+- to/from\_msgpack only works with standard typization [\#1021](https://github.com/nlohmann/json/issues/1021)
+- Build failure using latest clang and GCC compilers [\#1020](https://github.com/nlohmann/json/issues/1020)
+- can two json objects be concatenated? [\#1019](https://github.com/nlohmann/json/issues/1019)
+- Erase by integer index [\#1018](https://github.com/nlohmann/json/issues/1018)
+- Function find overload taking a json\_pointer [\#1017](https://github.com/nlohmann/json/issues/1017)
+- I think should implement an parser function [\#1016](https://github.com/nlohmann/json/issues/1016)
+- Readme gif [\#1015](https://github.com/nlohmann/json/issues/1015)
+- Python bindings [\#1014](https://github.com/nlohmann/json/issues/1014)
+- how to add two json string in single object?? [\#1012](https://github.com/nlohmann/json/issues/1012)
+- how to serialize class Object \(convert data in object into json\)?? [\#1011](https://github.com/nlohmann/json/issues/1011)
+- Enable forward declaration of json by making json a class instead of a using declaration [\#997](https://github.com/nlohmann/json/issues/997)
+- compilation error while using intel c++ compiler 2018 [\#994](https://github.com/nlohmann/json/issues/994)
+- How to create a json variable? [\#990](https://github.com/nlohmann/json/issues/990)
+- istream \>\> json  --- 1st character skipped in stream [\#976](https://github.com/nlohmann/json/issues/976)
+- Add a SAX parser [\#971](https://github.com/nlohmann/json/issues/971)
+- Add Key name to Exception [\#932](https://github.com/nlohmann/json/issues/932)
+- How to solve large json file? [\#927](https://github.com/nlohmann/json/issues/927)
+- json\_pointer public push\_back, pop\_back [\#837](https://github.com/nlohmann/json/issues/837)
+- Using input\_adapter in a slightly unexpected way [\#834](https://github.com/nlohmann/json/issues/834)
+- Stack-overflow \(OSS-Fuzz 4234\) [\#832](https://github.com/nlohmann/json/issues/832)
+
+- Fix -Wno-sometimes-uninitialized by initializing "result" in parse\_sax [\#1200](https://github.com/nlohmann/json/pull/1200) ([thyu](https://github.com/thyu))
+- \[RFC\] Introduce a new macro function: JSON\_INTERNAL\_CATCH [\#1187](https://github.com/nlohmann/json/pull/1187) ([simnalamburt](https://github.com/simnalamburt))
+- Fix unit tests that were silently skipped or crashed \(depending on the compiler\) [\#1176](https://github.com/nlohmann/json/pull/1176) ([grembo](https://github.com/grembo))
+- Refactor/no virtual sax [\#1153](https://github.com/nlohmann/json/pull/1153) ([theodelrieu](https://github.com/theodelrieu))
+- Fixed compiler error in VS 2015 for debug mode [\#1151](https://github.com/nlohmann/json/pull/1151) ([sonulohani](https://github.com/sonulohani))
+- Fix links to cppreference named requirements \(formerly concepts\) [\#1144](https://github.com/nlohmann/json/pull/1144) ([jrakow](https://github.com/jrakow))
+- meson: fix include directory [\#1142](https://github.com/nlohmann/json/pull/1142) ([jrakow](https://github.com/jrakow))
+- Feature/unordered map conversion [\#1138](https://github.com/nlohmann/json/pull/1138) ([theodelrieu](https://github.com/theodelrieu))
+- fixed compile error for \#1045 [\#1134](https://github.com/nlohmann/json/pull/1134) ([Daniel599](https://github.com/Daniel599))
+-  test \(non\)equality for alt\_string implementation  [\#1130](https://github.com/nlohmann/json/pull/1130) ([agrianius](https://github.com/agrianius))
+- remove stringstream dependency [\#1117](https://github.com/nlohmann/json/pull/1117) ([TinyTinni](https://github.com/TinyTinni))
+- Provide a from\_json overload for std::map [\#1089](https://github.com/nlohmann/json/pull/1089) ([theodelrieu](https://github.com/theodelrieu))
+- fix typo in README [\#1078](https://github.com/nlohmann/json/pull/1078) ([martin-mfg](https://github.com/martin-mfg))
+- Fix typo [\#1058](https://github.com/nlohmann/json/pull/1058) ([dns13](https://github.com/dns13))
+- Misc cmake packaging enhancements [\#1048](https://github.com/nlohmann/json/pull/1048) ([chuckatkins](https://github.com/chuckatkins))
+- Fixed incorrect LLVM version number in README [\#1047](https://github.com/nlohmann/json/pull/1047) ([jammehcow](https://github.com/jammehcow))
+- Fix trivial typo in comment. [\#1043](https://github.com/nlohmann/json/pull/1043) ([coryan](https://github.com/coryan))
+- Package Manager: Spack [\#1041](https://github.com/nlohmann/json/pull/1041) ([ax3l](https://github.com/ax3l))
+- CMake: 3.8+ is Sufficient [\#1040](https://github.com/nlohmann/json/pull/1040) ([ax3l](https://github.com/ax3l))
+- Added support for string\_view in C++17 [\#1028](https://github.com/nlohmann/json/pull/1028) ([gracicot](https://github.com/gracicot))
+- Added public target\_compile\_features for auto and constexpr [\#1026](https://github.com/nlohmann/json/pull/1026) ([ktonon](https://github.com/ktonon))
+
 ## [v3.1.2](https://github.com/nlohmann/json/releases/tag/v3.1.2) (2018-03-14)
 [Full Changelog](https://github.com/nlohmann/json/compare/v3.1.1...v3.1.2)
 
@@ -16,7 +196,6 @@ All notable changes to this project will be documented in this file. This projec
 - get\<T\> for types that are not default constructible [\#996](https://github.com/nlohmann/json/issues/996)
 - Prevent Null values to appear in .dump\(\) [\#995](https://github.com/nlohmann/json/issues/995)
 - number parsing [\#993](https://github.com/nlohmann/json/issues/993)
-- How to create a json variable? [\#990](https://github.com/nlohmann/json/issues/990)
 - C2664 \(C++/CLR\) cannot convert 'nullptr' to 'nullptr &&' [\#987](https://github.com/nlohmann/json/issues/987)
 - Uniform initialization from another json object differs between gcc and clang. [\#985](https://github.com/nlohmann/json/issues/985)
 - Problem with adding the lib as a submodule [\#983](https://github.com/nlohmann/json/issues/983)
diff --git a/Makefile b/Makefile
index a873292b..1deb8da5 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,7 @@ SRCS = include/nlohmann/json.hpp \
        include/nlohmann/detail/exceptions.hpp \
        include/nlohmann/detail/input/binary_reader.hpp \
        include/nlohmann/detail/input/input_adapters.hpp \
+       include/nlohmann/detail/input/json_sax.hpp \
        include/nlohmann/detail/input/lexer.hpp \
        include/nlohmann/detail/input/parser.hpp \
        include/nlohmann/detail/iterators/internal_iterator.hpp \
@@ -20,7 +21,10 @@ SRCS = include/nlohmann/json.hpp \
        include/nlohmann/detail/json_ref.hpp \
        include/nlohmann/detail/macro_scope.hpp \
        include/nlohmann/detail/macro_unscope.hpp \
-       include/nlohmann/detail/meta.hpp \
+       include/nlohmann/detail/meta/cpp_future.hpp \
+       include/nlohmann/detail/meta/detected.hpp \
+       include/nlohmann/detail/meta/type_traits.hpp \
+       include/nlohmann/detail/meta/void_t.hpp \
        include/nlohmann/detail/output/binary_writer.hpp \
        include/nlohmann/detail/output/output_adapters.hpp \
        include/nlohmann/detail/output/serializer.hpp \
@@ -82,9 +86,9 @@ clean:
 
 coverage:
 	mkdir build_coverage
-	cd build_coverage ; CXX=g++-5 cmake .. -GNinja -DJSON_Coverage=ON -DJSON_MultipleHeaders=ON
+	cd build_coverage ; CXX=g++-7 cmake .. -GNinja -DJSON_Coverage=ON -DJSON_MultipleHeaders=ON
 	cd build_coverage ; ninja
-	cd build_coverage ; ctest -j10
+	cd build_coverage ; ctest -E '.*_default' -j10
 	cd build_coverage ; ninja lcov_html
 	open build_coverage/test/html/index.html
 
diff --git a/README.md b/README.md
index 3ed3c183..f3bbf847 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ If you are using the [Meson Build System](http://mesonbuild.com), then you can w
 
 If you are using [Conan](https://www.conan.io/) to manage your dependencies, merely add `jsonformoderncpp/x.y.z@vthiery/stable` to your `conanfile.py`'s requires, where `x.y.z` is the release version you want to use. Please file issues [here](https://github.com/vthiery/conan-jsonformoderncpp/issues) if you experience problems with the packages.
 
+If you are using [Spack](https://www.spack.io/) to manage your dependencies, you can use the `nlohmann_json` package. Please see the [spack project](https://github.com/spack/spack) for any issues regarding the packaging.
+
 If you are using [hunter](https://github.com/ruslo/hunter/) on your project for external dependencies, then you can use the [nlohmann_json package](https://docs.hunter.sh/en/latest/packages/pkg/nlohmann_json.html). Please see the hunter project for any issues regarding the packaging.
 
 If you are using [Buckaroo](https://buckaroo.pm), you can install this library's module with `buckaroo install nlohmann/json`. Please file issues [here](https://github.com/LoopPerfect/buckaroo-recipes/issues/new?title=nlohmann/nlohmann/json).
@@ -84,6 +86,8 @@ If you are using [vcpkg](https://github.com/Microsoft/vcpkg/) on your project fo
 
 If you are using [cget](http://cget.readthedocs.io/en/latest/), you can install the latest development version with `cget install nlohmann/json`. A specific version can be installed with `cget install nlohmann/json@v3.1.0`. Also, the multiple header version can be installed by adding the `-DJSON_MultipleHeaders=ON` flag (i.e., `cget install nlohmann/json -DJSON_MultipleHeaders=ON`).
 
+If you are using [CocoaPods](https://cocoapods.org), you can use the library by adding pod `"nlohmann_json", '~>3.1.2'` to your podfile (see [an example](https://bitbucket.org/benman/nlohmann_json-cocoapod/src/master/)). Please file issues [here](https://bitbucket.org/benman/nlohmann_json-cocoapod/issues?status=new&status=open).
+
 ## Examples
 
 Beside the examples below, you may want to check the [documentation](https://nlohmann.github.io/json/) where each function contains a separate code example (e.g., check out [`emplace()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a5338e282d1d02bed389d852dd670d98d.html#a5338e282d1d02bed389d852dd670d98d)). All [example files](https://github.com/nlohmann/json/tree/develop/doc/examples) can be compiled and executed on their own (e.g., file [emplace.cpp](https://github.com/nlohmann/json/blob/develop/doc/examples/emplace.cpp)).
@@ -169,7 +173,6 @@ json empty_object_explicit = json::object();
 json array_not_object = json::array({ {"currency", "USD"}, {"value", 42.99} });
 ```
 
-
 ### Serialization / Deserialization
 
 #### To/from strings
@@ -235,6 +238,7 @@ std::cout << j_string << " == " << serialized_string << std::endl;
 
 [`.dump()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a5adea76fedba9898d404fef8598aa663.html#a5adea76fedba9898d404fef8598aa663) always returns the serialized value, and [`.get<std::string>()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a16f9445f7629f634221a42b967cdcd43.html#a16f9445f7629f634221a42b967cdcd43) returns the originally stored string value.
 
+Note the library only supports UTF-8. When you store strings with different encodings in the library, calling [`dump()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a5adea76fedba9898d404fef8598aa663.html#a5adea76fedba9898d404fef8598aa663) may throw an exception.
 
 #### To/from streams (e.g. files, string streams)
 
@@ -283,10 +287,53 @@ std::vector<std::uint8_t> v = {'t', 'r', 'u', 'e'};
 json j = json::parse(v);
 ```
 
+#### SAX interface
+
+The library uses a SAX-like interface with the following functions:
+
+```cpp
+// called when null is parsed
+bool null();
+
+// called when a boolean is parsed; value is passed
+bool boolean(bool val);
+
+// called when a signed or unsigned integer number is parsed; value is passed
+bool number_integer(number_integer_t val);
+bool number_unsigned(number_unsigned_t val);
+
+// called when a floating-point number is parsed; value and original string is passed
+bool number_float(number_float_t val, const string_t& s);
+
+// called when a string is parsed; value is passed and can be safely moved away
+bool string(string_t& val);
+
+// called when an object or array begins or ends, resp. The number of elements is passed (or -1 if not known)
+bool start_object(std::size_t elements);
+bool end_object();
+bool start_array(std::size_t elements);
+bool end_array();
+// called when an object key is parsed; value is passed and can be safely moved away
+bool key(string_t& val);
+
+// called when a parse error occurs; byte position, the last token, and an exception is passed
+bool parse_error(std::size_t position, const std::string& last_token, const detail::exception& ex);
+```
+
+The return value of each function determines whether parsing should proceed.
+
+To implement your own SAX handler, proceed as follows:
+
+1. Implement the SAX interface in a class. You can use class `nlohmann::json_sax<json>` as base class, but you can also use any class where the functions described above are implemented and public.
+2. Create an object of your SAX interface class, e.g. `my_sax`.
+3. Call `bool json::sax_parse(input, &my_sax)`; where the first parameter can be any input like a string or an input stream and the second parameter is a pointer to your SAX interface.
+
+Note the `sax_parse` function only returns a `bool` indicating the result of the last executed SAX event. It does not return a  `json` value - it is up to you to decide what to do with the SAX events. Furthermore, no exceptions are thrown in case of a parse error - it is up to you what to do with the exception object passed to your `parse_error` implementation. Internally, the SAX interface is used for the DOM parser (class `json_sax_dom_parser`) as well as the acceptor (`json_sax_acceptor`), see file [`json_sax.hpp`](https://github.com/nlohmann/json/blob/develop/include/nlohmann/detail/input/json_sax.hpp).
+
 
 ### STL-like access
 
-We designed the JSON class to behave just like an STL container. In fact, it satisfies the [**ReversibleContainer**](http://en.cppreference.com/w/cpp/concept/ReversibleContainer) requirement.
+We designed the JSON class to behave just like an STL container. In fact, it satisfies the [**ReversibleContainer**](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer) requirement.
 
 ```cpp
 // create an array using push_back
@@ -523,6 +570,14 @@ int vi = jn.get<int>();
 // etc.
 ```
 
+Note that `char` types are not automatically converted to JSON strings, but to integer numbers. A conversion to a string must be specified explicitly:
+
+```cpp
+char ch = 'A';                       // ASCII value 65
+json j_default = ch;                 // stores integer number 65
+json j_string = std::string(1, ch);  // stores string "A"
+```
+
 ### Arbitrary types conversions
 
 Every type can be serialized in JSON, not just STL containers and scalar types. Usually, you would do something along those lines:
@@ -600,7 +655,8 @@ Likewise, when calling `get<your_type>()`, the `from_json` method will be called
 Some important things:
 
 * Those methods **MUST** be in your type's namespace (which can be the global namespace), or the library will not be able to locate them (in this example, they are in namespace `ns`, where `person` is defined).
-* When using `get<your_type>()`, `your_type` **MUST** be [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible). (There is a way to bypass this requirement described later.)
+* Those methods **MUST** be available (e.g., properly headers must be included) everywhere you use the implicit conversions. Look at [issue 1108](https://github.com/nlohmann/json/issues/1108) for errors that may occur otherwise.
+* When using `get<your_type>()`, `your_type` **MUST** be [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible). (There is a way to bypass this requirement described later.)
 * In function `from_json`, use function [`at()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a93403e803947b86f4da2d1fb3345cf2c.html#a93403e803947b86f4da2d1fb3345cf2c) to access the object values rather than `operator[]`. In case a key does not exist, `at` throws an exception that you can handle, whereas `operator[]` exhibits undefined behavior.
 * In case your type contains several `operator=` definitions, code like `your_variable = your_json;` [may not compile](https://github.com/nlohmann/json/issues/667). You need to write `your_variable = your_json.get<decltype your_variable>();` instead.
 * You do not need to add serializers or deserializers for STL types like `std::vector`: the library already implements these.
@@ -612,7 +668,7 @@ Some important things:
 This requires a bit more advanced technique. But first, let's see how this conversion mechanism works:
 
 The library uses **JSON Serializers** to convert types to json.
-The default serializer for `nlohmann::json` is `nlohmann::adl_serializer` (ADL means [Argument-Dependent Lookup](http://en.cppreference.com/w/cpp/language/adl)).
+The default serializer for `nlohmann::json` is `nlohmann::adl_serializer` (ADL means [Argument-Dependent Lookup](https://en.cppreference.com/w/cpp/language/adl)).
 
 It is implemented like this (simplified):
 
@@ -661,7 +717,7 @@ namespace nlohmann {
 
 #### How can I use `get()` for non-default constructible/non-copyable types?
 
-There is a way, if your type is [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible). You will need to specialize the `adl_serializer` as well, but with a special `from_json` overload:
+There is a way, if your type is [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible). You will need to specialize the `adl_serializer` as well, but with a special `from_json` overload:
 
 ```cpp
 struct move_only_type {
@@ -786,8 +842,8 @@ json j_from_ubjson = json::from_ubjson(v_ubjson);
 
 Though it's 2018 already, the support for C++11 is still a bit sparse. Currently, the following compilers are known to work:
 
-- GCC 4.9 - 7.2 (and possibly later)
-- Clang 3.4 - 5.0 (and possibly later)
+- GCC 4.9 - 8.2 (and possibly later)
+- Clang 3.4 - 6.1 (and possibly later)
 - Intel C++ Compiler 17.0.2 (and possibly later)
 - Microsoft Visual C++ 2015 / Build Tools 14.0.25123.0 (and possibly later)
 - Microsoft Visual C++ 2017 / Build Tools 15.5.180.51428 (and possibly later)
@@ -809,32 +865,38 @@ Please note:
 
 - For GCC running on MinGW or Android SDK, the error `'to_string' is not a member of 'std'` (or similarly, for `strtod`) may occur. Note this is not an issue with the code,  but rather with the compiler itself. On Android, see above to build with a newer environment.  For MinGW, please refer to [this site](http://tehsausage.com/mingw-to-string) and [this discussion](https://github.com/nlohmann/json/issues/136) for information on how to fix this bug. For Android NDK using `APP_STL := gnustl_static`, please refer to [this discussion](https://github.com/nlohmann/json/issues/219).
 
+- Unsupported versions of GCC and Clang are rejected by `#error` directives. This can be switched off by defining `JSON_SKIP_UNSUPPORTED_COMPILER_CHECK`. Note that you can expect no support in this case.
+
 The following compilers are currently used in continuous integration at [Travis](https://travis-ci.org/nlohmann/json) and [AppVeyor](https://ci.appveyor.com/project/nlohmann/json):
 
 | Compiler        | Operating System             | Version String |
 |-----------------|------------------------------|----------------|
-| GCC 4.9.4       | Ubuntu 14.04.5 LTS           | g++-4.9 (Ubuntu 4.9.4-2ubuntu1~14.04.1) 4.9.4 |
-| GCC 5.4.1       | Ubuntu 14.04.5 LTS           | g++-5 (Ubuntu 5.4.1-2ubuntu1~14.04) 5.4.1 20160904 |
-| GCC 6.3.0       | Ubuntu 14.04.5 LTS           | g++-6 (Ubuntu/Linaro 6.3.0-18ubuntu2~14.04) 6.3.0 20170519 |
-| GCC 7.1.0       | Ubuntu 14.04.5 LTS           | g++-7 (Ubuntu 7.1.0-5ubuntu2~14.04) 7.1.0
-| Clang 3.5.0     | Ubuntu 14.04.5 LTS           | clang version 3.5.0-4ubuntu2~trusty2 (tags/RELEASE_350/final) |
-| Clang 3.6.2     | Ubuntu 14.04.5 LTS           | clang version 3.6.2-svn240577-1~exp1 (branches/release_36) |
-| Clang 3.7.1     | Ubuntu 14.04.5 LTS           | clang version 3.7.1-svn253571-1~exp1 (branches/release_37) |
-| Clang 3.8.0     | Ubuntu 14.04.5 LTS           | clang version 3.8.0-2ubuntu3~trusty5 (tags/RELEASE_380/final) |
-| Clang 3.9.1     | Ubuntu 14.04.5 LTS           | clang version 3.9.1-4ubuntu3~14.04.2 (tags/RELEASE_391/rc2) |
-| Clang 4.0.1     | Ubuntu 14.04.5 LTS           | clang version 4.0.1-svn305264-1~exp1 (branches/release_40) |
-| Clang 5.0.0     | Ubuntu 14.04.5 LTS           | clang version 5.0.0-svn310902-1~exp1 (branches/release_50) |
-| Clang Xcode 6.4 | Darwin Kernel Version 14.3.0 (OSX 10.10.3) | Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn) |
-| Clang Xcode 7.3 | Darwin Kernel Version 15.0.0 (OSX 10.10.5) | Apple LLVM version 7.3.0 (clang-703.0.29) |
-| Clang Xcode 8.0 | Darwin Kernel Version 15.6.0 | Apple LLVM version 8.0.0 (clang-800.0.38) |
-| Clang Xcode 8.1 | Darwin Kernel Version 16.1.0 (macOS 10.12.1) | Apple LLVM version 8.0.0 (clang-800.0.42.1) |
-| Clang Xcode 8.2 | Darwin Kernel Version 16.1.0 (macOS 10.12.1) | Apple LLVM version 8.0.0 (clang-800.0.42.1) |
-| Clang Xcode 8.3 | Darwin Kernel Version 16.5.0 (macOS 10.12.4) | Apple LLVM version 8.1.0 (clang-802.0.38) |
-| Clang Xcode 9.0 | Darwin Kernel Version 16.7.0 (macOS 10.12.6) | Apple LLVM version 9.0.0 (clang-900.0.37) |
-| Clang Xcode 9.1 | Darwin Kernel Version 16.7.0 (macOS 10.12.6) | Apple LLVM version 9.0.0 (clang-900.0.38) |
-| Clang Xcode 9.2 | Darwin Kernel Version 16.7.0 (macOS 10.12.6) | Apple LLVM version 8.1.0 (clang-900.0.39.2) |
+| GCC 4.9.4       | Ubuntu 14.04.1 LTS           | g++-4.9 (Ubuntu 4.9.4-2ubuntu1~14.04.1) 4.9.4 |
+| GCC 5.5.0       | Ubuntu 14.04.1 LTS           | g++-5 (Ubuntu 5.5.0-12ubuntu1~14.04) 5.5.0 20171010 |
+| GCC 6.4.0       | Ubuntu 14.04.1 LTS           | g++-6 (Ubuntu 6.4.0-17ubuntu1~14.04) 6.4.0 20180424 |
+| GCC 7.3.0       | Ubuntu 14.04.1 LTS           | g++-7 (Ubuntu 7.3.0-21ubuntu1~14.04) 7.3.0 |
+| GCC 7.3.0       | Windows Server 2012 R2 (x64) | g++ (x86_64-posix-seh-rev0, Built by MinGW-W64 project) 7.3.0 |
+| GCC 8.1.0       | Ubuntu 14.04.1 LTS           | g++-8 (Ubuntu 8.1.0-5ubuntu1~14.04) 8.1.0 |
+| Clang 3.5.0     | Ubuntu 14.04.1 LTS           | clang version 3.5.0-4ubuntu2~trusty2 (tags/RELEASE_350/final) (based on LLVM 3.5.0) |
+| Clang 3.6.2     | Ubuntu 14.04.1 LTS           | clang version 3.6.2-svn240577-1~exp1 (branches/release_36) (based on LLVM 3.6.2) |
+| Clang 3.7.1     | Ubuntu 14.04.1 LTS           | clang version 3.7.1-svn253571-1~exp1 (branches/release_37) (based on LLVM 3.7.1) |
+| Clang 3.8.0     | Ubuntu 14.04.1 LTS           | clang version 3.8.0-2ubuntu3~trusty5 (tags/RELEASE_380/final) |
+| Clang 3.9.1     | Ubuntu 14.04.1 LTS           | clang version 3.9.1-4ubuntu3~14.04.3 (tags/RELEASE_391/rc2) |
+| Clang 4.0.1     | Ubuntu 14.04.1 LTS           | clang version 4.0.1-svn305264-1~exp1 (branches/release_40) |
+| Clang 5.0.2     | Ubuntu 14.04.1 LTS           | clang version 5.0.2-svn328729-1~exp1~20180509123505.100 (branches/release_50) |
+| Clang 6.0.1     | Ubuntu 14.04.1 LTS           | clang version 6.0.1-svn334776-1~exp1~20180726133705.85 (branches/release_60) |
+| Clang Xcode 6.4 | OSX 10.10.5 | Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn) |
+| Clang Xcode 7.3 | OSX 10.11.6 | Apple LLVM version 7.3.0 (clang-703.0.31) |
+| Clang Xcode 8.0 | OSX 10.11.6 | Apple LLVM version 8.0.0 (clang-800.0.38) |
+| Clang Xcode 8.1 | OSX 10.12.6 | Apple LLVM version 8.0.0 (clang-800.0.42.1) |
+| Clang Xcode 8.2 | OSX 10.12.6 | Apple LLVM version 8.0.0 (clang-800.0.42.1) |
+| Clang Xcode 8.3 | OSX 10.11.6 | Apple LLVM version 8.1.0 (clang-802.0.38) |
+| Clang Xcode 9.0 | OSX 10.12.6 | Apple LLVM version 9.0.0 (clang-900.0.37) |
+| Clang Xcode 9.1 | OSX 10.12.6 | Apple LLVM version 9.0.0 (clang-900.0.38) |
+| Clang Xcode 9.2 | OSX 10.13.3 | Apple LLVM version 9.1.0 (clang-902.0.39.1) |
+| Clang Xcode 9.3 | OSX 10.13.3 | Apple LLVM version 9.1.0 (clang-902.0.39.2) |
 | Visual Studio 14 2015 | Windows Server 2012 R2 (x64) | Microsoft (R) Build Engine version 14.0.25420.1, MSVC 19.0.24215.1 |
-| Visual Studio 2017 | Windows Server 2016 | Microsoft (R) Build Engine version 15.5.180.51428, MSVC 19.12.25830.2 |
+| Visual Studio 2017 | Windows Server 2016 | Microsoft (R) Build Engine version 15.7.180.61344, MSVC 19.14.26433.0 |
 
 ## License
 
@@ -862,6 +924,9 @@ If you have questions regarding the library, I would like to invite you to [open
 
 Only if your request would contain confidential information, please [send me an email](mailto:mail@nlohmann.me). For encrypted messages, please use [this key](https://keybase.io/nlohmann/pgp_keys.asc).
 
+## Security
+
+[Commits by Niels Lohmann](https://github.com/nlohmann/json/commits) and [releases](https://github.com/nlohmann/json/releases) are signed with this [PGP Key](https://keybase.io/nlohmann/pgp_keys.asc?fingerprint=797167ae41c0a6d9232e48457f3cea63ae251b69).
 
 ## Thanks
 
@@ -916,7 +981,7 @@ I deeply appreciate the help of the following people.
 - [Vladimir Petrigo](https://github.com/vpetrigo) made a SFINAE hack more readable and added Visual Studio 17 to the build matrix.
 - [Denis Andrejew](https://github.com/seeekr) fixed a grammar issue in the README file.
 - [Pierre-Antoine Lacaze](https://github.com/palacaze) found a subtle bug in the `dump()` function.
-- [TurpentineDistillery](https://github.com/TurpentineDistillery) pointed to [`std::locale::classic()`](http://en.cppreference.com/w/cpp/locale/locale/classic) to avoid too much locale joggling, found some nice performance improvements in the parser, improved the benchmarking code, and realized locale-independent number parsing and printing.
+- [TurpentineDistillery](https://github.com/TurpentineDistillery) pointed to [`std::locale::classic()`](https://en.cppreference.com/w/cpp/locale/locale/classic) to avoid too much locale joggling, found some nice performance improvements in the parser, improved the benchmarking code, and realized locale-independent number parsing and printing.
 - [cgzones](https://github.com/cgzones) had an idea how to fix the Coverity scan.
 - [Jared Grubb](https://github.com/jaredgrubb) silenced a nasty documentation warning.
 - [Yixin Zhang](https://github.com/qwename) fixed an integer overflow check.
@@ -975,14 +1040,29 @@ I deeply appreciate the help of the following people.
 - [Paul Fultz II](https://github.com/pfultz2) added a note on the cget package manager.
 - [Wilson Lin](https://github.com/wla80) made the integration section of the README more concise.
 - [RalfBielig](https://github.com/ralfbielig) detected and fixed a memory leak in the parser callback.
-- [agrianius](https://github.com/agrianius) allowed to dump JSON to an alternative string type
+- [agrianius](https://github.com/agrianius) allowed to dump JSON to an alternative string type.
+- [Kevin Tonon](https://github.com/ktonon) overworked the C++11 compiler checks in CMake.
+- [Axel Huebl](https://github.com/ax3l) simplified a CMake check and added support for the [Spack package manager](https://spack.io).
+- [Carlos O'Ryan](https://github.com/coryan) fixed a typo.
+- [James Upjohn](https://github.com/jammehcow) fixed a version number in the compilers section.
+- [Chuck Atkins](https://github.com/chuckatkins) adjusted the CMake files to the CMake packaging guidelines
+- [Jan Schöppach](https://github.com/dns13) fixed a typo.
+- [martin-mfg](https://github.com/martin-mfg) fixed a typo.
+- [Matthias Möller](https://github.com/TinyTinni) removed the dependency from `std::stringstream`.
+- [agrianius](https://github.com/agrianius) added code to use alternative string implementations.
+- [Daniel599](https://github.com/Daniel599) allowed to use more algorithms with the `items()` function.
+- [Julius Rakow](https://github.com/jrakow) fixed the Meson include directory and fixed the links to [cppreference.com](cppreference.com).
+- [Sonu Lohani](https://github.com/sonulohani) fixed the compilation with MSVC 2015 in debug mode.
+- [grembo](https://github.com/grembo) fixed the test suite and re-enabled several test cases.
+- [Hyeon Kim](https://github.com/simnalamburt) introduced the macro `JSON_INTERNAL_CATCH` to control the exception handling inside the library.
+- [thyu](https://github.com/thyu) fixed a compiler warning.
 
 Thanks a lot for helping out! Please [let me know](mailto:mail@nlohmann.me) if I forgot someone.
 
 
 ## Used third-party tools
 
-The library itself contains of a single header file licensed under the MIT license. However, it is built, tested, documented, and whatnot using a lot of third-party tools and services. Thanks a lot!
+The library itself consists of a single header file licensed under the MIT license. However, it is built, tested, documented, and whatnot using a lot of third-party tools and services. Thanks a lot!
 
 - [**amalgamate.py - Amalgamate C source and header files**](https://github.com/edlund/amalgamate) to create a single header file
 - [**American fuzzy lop**](http://lcamtuf.coredump.cx/afl/) for fuzz testing
@@ -1015,7 +1095,7 @@ The library is currently used in Apple macOS Sierra and iOS 10. I am not sure wh
 
 ## Notes
 
-- The code contains numerous debug **assertions** which can be switched off by defining the preprocessor macro `NDEBUG`, see the [documentation of `assert`](http://en.cppreference.com/w/cpp/error/assert). In particular, note [`operator[]`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a2e26bd0b0168abb61f67ad5bcd5b9fa1.html#a2e26bd0b0168abb61f67ad5bcd5b9fa1) implements **unchecked access** for const objects: If the given key is not present, the behavior is undefined (think of a dereferenced null pointer) and yields an [assertion failure](https://github.com/nlohmann/json/issues/289) if assertions are switched on. If you are not sure whether an element in an object exists, use checked access with the [`at()` function](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a674de1ee73e6bf4843fc5dc1351fb726.html#a674de1ee73e6bf4843fc5dc1351fb726).
+- The code contains numerous debug **assertions** which can be switched off by defining the preprocessor macro `NDEBUG`, see the [documentation of `assert`](https://en.cppreference.com/w/cpp/error/assert). In particular, note [`operator[]`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a2e26bd0b0168abb61f67ad5bcd5b9fa1.html#a2e26bd0b0168abb61f67ad5bcd5b9fa1) implements **unchecked access** for const objects: If the given key is not present, the behavior is undefined (think of a dereferenced null pointer) and yields an [assertion failure](https://github.com/nlohmann/json/issues/289) if assertions are switched on. If you are not sure whether an element in an object exists, use checked access with the [`at()` function](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_a674de1ee73e6bf4843fc5dc1351fb726.html#a674de1ee73e6bf4843fc5dc1351fb726).
 - As the exact type of a number is not defined in the [JSON specification](http://rfc7159.net/rfc7159), this library tries to choose the best fitting C++ number type automatically. As a result, the type `double` may be used to store numbers which may yield [**floating-point exceptions**](https://github.com/nlohmann/json/issues/181) in certain rare situations if floating-point exceptions have been unmasked in the calling code. These exceptions are not caused by the library and need to be fixed in the calling code, such as by re-masking the exceptions prior to calling library functions.
 - The library supports **Unicode input** as follows:
   - Only **UTF-8** encoded input is supported which is the default encoding for JSON according to [RFC 7159](http://rfc7159.net/rfc7159#rfc.section.8.1).
diff --git a/appveyor.yml b/appveyor.yml
index da703786..705f53fa 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,26 +1,58 @@
 version: '{build}'
 
-os: 
-  - Visual Studio 2015
-  - Visual Studio 2017
-
 environment:
   matrix:
-  - additional_flags: ""
-  - additional_flags: "/permissive- /std:c++latest /utf-8"
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      COMPILER: mingw
+      platform: x86
+      FLAGS: ""
+      GENERATOR: Ninja
 
-matrix:
-  exclude:
-    - additional_flags: "/permissive- /std:c++latest /utf-8"
-      os: Visual Studio 2015
-  
-init: []
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      platform: x86
+      FLAGS: ""
+      GENERATOR: Visual Studio 14 2015
 
-install: []
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      platform: x86
+      FLAGS: ""
+      GENERATOR: Visual Studio 15 2017
+
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      platform: x86
+      FLAGS: "/permissive- /std:c++latest /utf-8"
+      GENERATOR: Visual Studio 15 2017
+
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      platform: x64
+      FLAGS: ""
+      GENERATOR: Visual Studio 14 2015
+
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      platform: x64
+      FLAGS: ""
+      GENERATOR: Visual Studio 15 2017
+
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      platform: x64
+      FLAGS: "/permissive- /std:c++latest /utf-8"
+      GENERATOR: Visual Studio 15 2017
+
+init:
+  - cmake --version
+  - msbuild /version
+
+install:
+  - if "%COMPILER%"=="mingw" appveyor DownloadFile https://github.com/ninja-build/ninja/releases/download/v1.6.0/ninja-win.zip -FileName ninja.zip
+  - if "%COMPILER%"=="mingw" 7z x ninja.zip -oC:\projects\deps\ninja > nul
+  - if "%COMPILER%"=="mingw" set PATH=C:\projects\deps\ninja;%PATH%
+  - if "%COMPILER%"=="mingw" set PATH=C:\mingw-w64\x86_64-7.3.0-posix-seh-rt_v5-rev0\mingw64\bin;%PATH%
+  - if "%COMPILER%"=="mingw" g++ --version
+
+before_build:
+  - cmake . -G "%GENERATOR%" -DCMAKE_CXX_FLAGS="%FLAGS%" -DCMAKE_IGNORE_PATH="C:/Program Files/Git/usr/bin"
 
 build_script:
-  - IF "%APPVEYOR_BUILD_WORKER_IMAGE%" == "Visual Studio 2015" ( SET GEN="Visual Studio 14 2015") ELSE (SET GEN="Visual Studio 15 2017")
-  - cmake . -G%GEN% -DCMAKE_CXX_FLAGS="%additional_flags%"
   - cmake --build . --config Release
 
 test_script:
diff --git a/benchmarks/CMakeLists.txt b/benchmarks/CMakeLists.txt
index c10d44e9..a53812c1 100644
--- a/benchmarks/CMakeLists.txt
+++ b/benchmarks/CMakeLists.txt
@@ -1,9 +1,9 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.8)
 project(JSON_Benchmarks LANGUAGES CXX)
 
 # set compiler flags
 if((CMAKE_CXX_COMPILER_ID MATCHES GNU) OR (CMAKE_CXX_COMPILER_ID MATCHES Clang))
-   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -flto -DNDEBUG -O3")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto -DNDEBUG -O3")
 endif()
 
 # configure Google Benchmarks
@@ -23,4 +23,5 @@ file(COPY ${CMAKE_SOURCE_DIR}/../test/data/regression/floats.json
 
 # benchmark binary
 add_executable(json_benchmarks src/benchmarks.cpp)
+target_compile_features(json_benchmarks PRIVATE cxx_std_11)
 target_link_libraries(json_benchmarks benchmark ${CMAKE_THREAD_LIBS_INIT})
diff --git a/cmake/config.cmake.in b/cmake/config.cmake.in
index b4fd29d9..8baabf07 100644
--- a/cmake/config.cmake.in
+++ b/cmake/config.cmake.in
@@ -1,3 +1,5 @@
 @PACKAGE_INIT@
-include("${CMAKE_CURRENT_LIST_DIR}/@NLOHMANN_JSON_TARGETS_EXPORT_NAME@.cmake")
+if(NOT TARGET @PROJECT_NAME@::@NLOHMANN_JSON_TARGET_NAME@)
+    include("${CMAKE_CURRENT_LIST_DIR}/@NLOHMANN_JSON_TARGETS_EXPORT_NAME@.cmake")
+endif()
 check_required_components("@PROJECT_NAME@")
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 977e4193..f9512640 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "JSON for Modern C++"
-PROJECT_NUMBER         = 3.1.2
+PROJECT_NUMBER         = 3.2.0
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = .
diff --git a/doc/avatars.png b/doc/avatars.png
index 00241908..4798d3ba 100644
Binary files a/doc/avatars.png and b/doc/avatars.png differ
diff --git a/doc/examples/README.cpp b/doc/examples/README.cpp
index 04b488db..2d641e58 100644
--- a/doc/examples/README.cpp
+++ b/doc/examples/README.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/README.link b/doc/examples/README.link
index 45b4cfb0..a9d70c40 100644
--- a/doc/examples/README.link
+++ b/doc/examples/README.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/TarF5pPn9NtHQjhf"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/VexEaSCbbvOOXsPt"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/diff.cpp b/doc/examples/diff.cpp
index a29f14d2..71b19be6 100644
--- a/doc/examples/diff.cpp
+++ b/doc/examples/diff.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/diff.link b/doc/examples/diff.link
index dfd1772b..8873343f 100644
--- a/doc/examples/diff.link
+++ b/doc/examples/diff.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/tfI8DuCuZs3VB9VF"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/3OPLSVPyweUyEHaX"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/flatten.cpp b/doc/examples/flatten.cpp
index 2bd7e9e8..83f3ff6c 100644
--- a/doc/examples/flatten.cpp
+++ b/doc/examples/flatten.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/flatten.link b/doc/examples/flatten.link
index 8eb81a69..d28cafb5 100644
--- a/doc/examples/flatten.link
+++ b/doc/examples/flatten.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/E1HQedkl1zo48WW5"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/4bn447WQbTERfBaL"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/from_cbor.cpp b/doc/examples/from_cbor.cpp
index 633b3e79..e49987e5 100644
--- a/doc/examples/from_cbor.cpp
+++ b/doc/examples/from_cbor.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/from_cbor.link b/doc/examples/from_cbor.link
index 6e27db91..a1798c9f 100644
--- a/doc/examples/from_cbor.link
+++ b/doc/examples/from_cbor.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/mya8dUDcDDVoUlBZ"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/AHKW5EMQN4YQ68TY"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/from_msgpack.cpp b/doc/examples/from_msgpack.cpp
index 8a99b3c5..67fdc454 100644
--- a/doc/examples/from_msgpack.cpp
+++ b/doc/examples/from_msgpack.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/from_msgpack.link b/doc/examples/from_msgpack.link
index ddfdcb34..4512c132 100644
--- a/doc/examples/from_msgpack.link
+++ b/doc/examples/from_msgpack.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/sMmEKxW5MGOgLC7z"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/J0KoQF8sOpdMg4kN"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/from_ubjson.cpp b/doc/examples/from_ubjson.cpp
index b20999fd..a84057ed 100644
--- a/doc/examples/from_ubjson.cpp
+++ b/doc/examples/from_ubjson.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/from_ubjson.link b/doc/examples/from_ubjson.link
index 2855f18c..390612bd 100644
--- a/doc/examples/from_ubjson.link
+++ b/doc/examples/from_ubjson.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/qq29jfETq7nZRrh5"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/uuQK0DAjhbSd96K6"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/meta.cpp b/doc/examples/meta.cpp
index e800b9be..a051575b 100644
--- a/doc/examples/meta.cpp
+++ b/doc/examples/meta.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/meta.link b/doc/examples/meta.link
index 4da2b02b..f5717459 100644
--- a/doc/examples/meta.link
+++ b/doc/examples/meta.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/0zdmfNQCe4TMw0iI"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/eFzRNyod3g4aVkvl"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/meta.output b/doc/examples/meta.output
index 3c4bf323..3683a17c 100644
--- a/doc/examples/meta.output
+++ b/doc/examples/meta.output
@@ -2,7 +2,7 @@
     "compiler": {
         "c++": "201103",
         "family": "clang",
-        "version": "9.0.0 (clang-900.0.39.2)"
+        "version": "9.1.0 (clang-902.0.39.2)"
     },
     "copyright": "(C) 2013-2017 Niels Lohmann",
     "name": "JSON for Modern C++",
@@ -10,8 +10,8 @@
     "url": "https://github.com/nlohmann/json",
     "version": {
         "major": 3,
-        "minor": 1,
-        "patch": 2,
-        "string": "3.1.2"
+        "minor": 2,
+        "patch": 0,
+        "string": "3.2.0"
     }
 }
diff --git a/doc/examples/operator__greater.cpp b/doc/examples/operator__greater.cpp
index c632387c..65bb9c04 100644
--- a/doc/examples/operator__greater.cpp
+++ b/doc/examples/operator__greater.cpp
@@ -17,8 +17,8 @@ int main()
 
     // output values and comparisons
     std::cout << std::boolalpha;
-    std::cout << array_1 << " == " << array_2 << " " << (array_1 > array_2) << '\n';
-    std::cout << object_1 << " == " << object_2 << " " << (object_1 > object_2) << '\n';
-    std::cout << number_1 << " == " << number_2 << " " << (number_1 > number_2) << '\n';
-    std::cout << string_1 << " == " << string_2 << " " << (string_1 > string_2) << '\n';
+    std::cout << array_1 << " > " << array_2 << " " << (array_1 > array_2) << '\n';
+    std::cout << object_1 << " > " << object_2 << " " << (object_1 > object_2) << '\n';
+    std::cout << number_1 << " > " << number_2 << " " << (number_1 > number_2) << '\n';
+    std::cout << string_1 << " > " << string_2 << " " << (string_1 > string_2) << '\n';
 }
diff --git a/doc/examples/operator__greater.link b/doc/examples/operator__greater.link
index 3fc848ea..c59a48a1 100644
--- a/doc/examples/operator__greater.link
+++ b/doc/examples/operator__greater.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/yiz7oCHVpFHSALB1"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/ntF7DMzC85gbQKHu"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__greater.output b/doc/examples/operator__greater.output
index 045847c3..910c48e3 100644
--- a/doc/examples/operator__greater.output
+++ b/doc/examples/operator__greater.output
@@ -1,4 +1,4 @@
-[1,2,3] == [1,2,4] false
-{"A":"a","B":"b"} == {"A":"a","B":"b"} false
-17 == 17.0000000000001 false
-"foo" == "bar" true
+[1,2,3] > [1,2,4] false
+{"A":"a","B":"b"} > {"A":"a","B":"b"} false
+17 > 17.0000000000001 false
+"foo" > "bar" true
diff --git a/doc/examples/operator_deserialize.cpp b/doc/examples/operator_deserialize.cpp
index bf214480..8e3d8bd8 100644
--- a/doc/examples/operator_deserialize.cpp
+++ b/doc/examples/operator_deserialize.cpp
@@ -1,4 +1,6 @@
 #include <iostream>
+#include <iomanip>
+#include <sstream>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator_deserialize.link b/doc/examples/operator_deserialize.link
index 72d7350e..1d34af29 100644
--- a/doc/examples/operator_deserialize.link
+++ b/doc/examples/operator_deserialize.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/YrUqrUFMD7JHwSQR"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/IvgowYGaX0SgOFIG"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator_serialize.cpp b/doc/examples/operator_serialize.cpp
index 0c46f014..3bd4ad57 100644
--- a/doc/examples/operator_serialize.cpp
+++ b/doc/examples/operator_serialize.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator_serialize.link b/doc/examples/operator_serialize.link
index 57edc8cc..2367d1c3 100644
--- a/doc/examples/operator_serialize.link
+++ b/doc/examples/operator_serialize.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/wXcm4ObnoaXw7CRt"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/ckGZIBookDffV00n"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorarray__key_type.cpp b/doc/examples/operatorarray__key_type.cpp
index 8db08d0b..f9b7f731 100644
--- a/doc/examples/operatorarray__key_type.cpp
+++ b/doc/examples/operatorarray__key_type.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/operatorarray__key_type.link b/doc/examples/operatorarray__key_type.link
index c1a534b1..50fd455e 100644
--- a/doc/examples/operatorarray__key_type.link
+++ b/doc/examples/operatorarray__key_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/vxt8d8qvYorXS2yq"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/oKnfnFrLHG8H1OAl"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__array__parser_callback_t.cpp b/doc/examples/parse__array__parser_callback_t.cpp
index 6083a959..63f0a0e4 100644
--- a/doc/examples/parse__array__parser_callback_t.cpp
+++ b/doc/examples/parse__array__parser_callback_t.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/parse__array__parser_callback_t.link b/doc/examples/parse__array__parser_callback_t.link
index 017f9ff5..02a92b80 100644
--- a/doc/examples/parse__array__parser_callback_t.link
+++ b/doc/examples/parse__array__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/TSNxHmegVwLW2pXf"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/i3BBhl7Ub5y9b0yp"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp b/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp
index fe51560c..14cfa251 100644
--- a/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp
+++ b/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/parse__contiguouscontainer__parser_callback_t.link b/doc/examples/parse__contiguouscontainer__parser_callback_t.link
index 2cc96595..8153d5d2 100644
--- a/doc/examples/parse__contiguouscontainer__parser_callback_t.link
+++ b/doc/examples/parse__contiguouscontainer__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/l3zNo3YKC2X8yAw9"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/sGdJMOaJnFNJBtH7"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__istream__parser_callback_t.cpp b/doc/examples/parse__istream__parser_callback_t.cpp
index 92e62d9b..afcaa39d 100644
--- a/doc/examples/parse__istream__parser_callback_t.cpp
+++ b/doc/examples/parse__istream__parser_callback_t.cpp
@@ -1,4 +1,6 @@
 #include <iostream>
+#include <iomanip>
+#include <sstream>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/parse__istream__parser_callback_t.link b/doc/examples/parse__istream__parser_callback_t.link
index 64b703a6..3b51c08b 100644
--- a/doc/examples/parse__istream__parser_callback_t.link
+++ b/doc/examples/parse__istream__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Mf7A6JtvqT1Na7Pk"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/UZgRBIeqdZhm6M8F"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__iteratortype__parser_callback_t.cpp b/doc/examples/parse__iteratortype__parser_callback_t.cpp
index b513fe77..1b5e23d4 100644
--- a/doc/examples/parse__iteratortype__parser_callback_t.cpp
+++ b/doc/examples/parse__iteratortype__parser_callback_t.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/parse__iteratortype__parser_callback_t.link b/doc/examples/parse__iteratortype__parser_callback_t.link
index 9adda14f..4e0174a0 100644
--- a/doc/examples/parse__iteratortype__parser_callback_t.link
+++ b/doc/examples/parse__iteratortype__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/oa6BVkBXjG8DNkzX"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/VThe0hdMSUdNSOLK"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__string__parser_callback_t.cpp b/doc/examples/parse__string__parser_callback_t.cpp
index 4db82d90..2ae4410a 100644
--- a/doc/examples/parse__string__parser_callback_t.cpp
+++ b/doc/examples/parse__string__parser_callback_t.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/parse__string__parser_callback_t.link b/doc/examples/parse__string__parser_callback_t.link
index 8eab4cd6..fb6bec03 100644
--- a/doc/examples/parse__string__parser_callback_t.link
+++ b/doc/examples/parse__string__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/QXdl4yzts3qPeZ0U"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/QZgjsR0PiAw2Lqpk"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/patch.cpp b/doc/examples/patch.cpp
index a3c64a61..b0896c79 100644
--- a/doc/examples/patch.cpp
+++ b/doc/examples/patch.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/patch.link b/doc/examples/patch.link
index 19970624..1a9d189f 100644
--- a/doc/examples/patch.link
+++ b/doc/examples/patch.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/8ObNa6ejw4BXQ5qG"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/hFd1W46W2Hb81sHN"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/sax_parse.cpp b/doc/examples/sax_parse.cpp
new file mode 100644
index 00000000..69e8962c
--- /dev/null
+++ b/doc/examples/sax_parse.cpp
@@ -0,0 +1,124 @@
+#include <iostream>
+#include <iomanip>
+#include <sstream>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+// a simple event consumer that collects string representations of the passed
+// values; not inheriting from json::json_sax_t is not required, but can
+// help not to forget a required function
+class sax_event_consumer : public json::json_sax_t
+{
+  public:
+    std::vector<std::string> events;
+
+    bool null() override
+    {
+        events.push_back("value: null");
+        return true;
+    }
+
+    bool boolean(bool val) override
+    {
+        events.push_back("value: " + std::string(val ? "true" : "false"));
+        return true;
+    }
+
+    bool number_integer(number_integer_t val) override
+    {
+        events.push_back("value: " + std::to_string(val));
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val) override
+    {
+        events.push_back("value: " + std::to_string(val));
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t& s) override
+    {
+        events.push_back("value: " + s);
+        return true;
+    }
+
+    bool string(string_t& val) override
+    {
+        events.push_back("value: " + val);
+        return true;
+    }
+
+    bool start_object(std::size_t elements) override
+    {
+        events.push_back("start: object");
+        return true;
+    }
+
+    bool end_object() override
+    {
+        events.push_back("end: object");
+        return true;
+    }
+
+    bool start_array(std::size_t elements) override
+    {
+        events.push_back("start: array");
+        return true;
+    }
+
+    bool end_array() override
+    {
+        events.push_back("end: array");
+        return true;
+    }
+
+    bool key(string_t& val) override
+    {
+        events.push_back("key: " + val);
+        return true;
+    }
+
+    bool parse_error(std::size_t position, const std::string& last_token, const json::exception& ex) override
+    {
+        events.push_back("error: " + std::string(ex.what()));
+        return false;
+    }
+};
+
+int main()
+{
+    // a JSON text
+    auto text = R"(
+    {
+        "Image": {
+            "Width":  800,
+            "Height": 600,
+            "Title":  "View from 15th Floor",
+            "Thumbnail": {
+                "Url":    "http://www.example.com/image/481989943",
+                "Height": 125,
+                "Width":  100
+            },
+            "Animated" : false,
+            "IDs": [116, 943, 234, 38793],
+            "Distance": 12.723374634
+        }
+    }
+    )";
+
+    // create a SAX event consumer object
+    sax_event_consumer sec;
+
+    // parse and serialize JSON
+    bool result = json::sax_parse(text, &sec);
+
+    // output the recorded events
+    for (auto& event : sec.events)
+    {
+        std::cout << "(" << event << ") ";
+    }
+
+    // output the result of sax_parse
+    std::cout << "\nresult: " << std::boolalpha << result << std::endl;
+}
diff --git a/doc/examples/sax_parse.link b/doc/examples/sax_parse.link
new file mode 100644
index 00000000..14aa5e38
--- /dev/null
+++ b/doc/examples/sax_parse.link
@@ -0,0 +1 @@
+<a target="_blank" href="https://wandbox.org/permlink/fGkQLWbQn7enKkIG"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/sax_parse.output b/doc/examples/sax_parse.output
new file mode 100644
index 00000000..e16c2c4d
--- /dev/null
+++ b/doc/examples/sax_parse.output
@@ -0,0 +1,2 @@
+(start: object) (key: Image) (start: object) (key: Width) (value: 800) (key: Height) (value: 600) (key: Title) (value: View from 15th Floor) (key: Thumbnail) (start: object) (key: Url) (value: http://www.example.com/image/481989943) (key: Height) (value: 125) (key: Width) (value: 100) (end: object) (key: Animated) (value: false) (key: IDs) (start: array) (value: 116) (value: 943) (value: 234) (value: 38793) (end: array) (key: Distance) (value: 12.723374634) (end: object) (end: object) 
+result: true
diff --git a/doc/examples/to_cbor.cpp b/doc/examples/to_cbor.cpp
index b4849c1a..1237ca86 100644
--- a/doc/examples/to_cbor.cpp
+++ b/doc/examples/to_cbor.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/to_cbor.link b/doc/examples/to_cbor.link
index 31f4809f..bc4543af 100644
--- a/doc/examples/to_cbor.link
+++ b/doc/examples/to_cbor.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/4bQSclXeqjVFYVL3"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/LRM37xarSuPJmv92"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/to_msgpack.cpp b/doc/examples/to_msgpack.cpp
index 8b18a123..99cc9eda 100644
--- a/doc/examples/to_msgpack.cpp
+++ b/doc/examples/to_msgpack.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/to_msgpack.link b/doc/examples/to_msgpack.link
index dfc0d333..9a3a0985 100644
--- a/doc/examples/to_msgpack.link
+++ b/doc/examples/to_msgpack.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/WvT2Q0r9vlJYyMM8"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/CaRFhkrefL4miesE"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/to_ubjson.cpp b/doc/examples/to_ubjson.cpp
index 8a25e618..06b2abba 100644
--- a/doc/examples/to_ubjson.cpp
+++ b/doc/examples/to_ubjson.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/to_ubjson.link b/doc/examples/to_ubjson.link
index add6fe49..f565adba 100644
--- a/doc/examples/to_ubjson.link
+++ b/doc/examples/to_ubjson.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/j3HE6cOkCmKbxxAt"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/2luqHy9iADx4UNm7"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/unflatten.cpp b/doc/examples/unflatten.cpp
index 5e3d65e0..75fb02d0 100644
--- a/doc/examples/unflatten.cpp
+++ b/doc/examples/unflatten.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/unflatten.link b/doc/examples/unflatten.link
index d13f1717..1af68537 100644
--- a/doc/examples/unflatten.link
+++ b/doc/examples/unflatten.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/U45AGi5nsDtoDf3u"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/knK4jnD2hIVxQoyk"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/update.cpp b/doc/examples/update.cpp
index b77c0fef..fecdae76 100644
--- a/doc/examples/update.cpp
+++ b/doc/examples/update.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/update.link b/doc/examples/update.link
index 5ad367d0..1aa7e60b 100644
--- a/doc/examples/update.link
+++ b/doc/examples/update.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/TGvdYyJtstacZxWq"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/kjcoWACW7FMqKRBG"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/update__range.cpp b/doc/examples/update__range.cpp
index 88780fd4..9f3e521a 100644
--- a/doc/examples/update__range.cpp
+++ b/doc/examples/update__range.cpp
@@ -1,4 +1,5 @@
 #include <iostream>
+#include <iomanip>
 #include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
diff --git a/doc/examples/update__range.link b/doc/examples/update__range.link
index d2d85a82..222c6e6f 100644
--- a/doc/examples/update__range.link
+++ b/doc/examples/update__range.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/BMlas6312rkE4cxz"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/0LBIsEa18IrerWwy"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/index.md b/doc/index.md
index b3d61144..a2ad364b 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -39,9 +39,11 @@ These pages contain the API documentation of JSON for Modern C++, a C++11 header
     - @link nlohmann::basic_json::dump dump @endlink serialize to string
     - @link nlohmann::basic_json::operator<<(std::ostream&, const basic_json &) operator<< @endlink serialize to stream
   - deserialization / parsing
-    - @link nlohmann::basic_json::parse parse @endlink parse from string
+    - @link nlohmann::basic_json::parse parse @endlink parse from input (string, file, etc.) and return JSON value
+    - @link nlohmann::basic_json::sax_parse sax_parse @endlink parse from input (string, file, etc.) and generate SAX events
     - @link nlohmann::basic_json::operator>>(std::istream&, basic_json&) operator>> @endlink parse from stream
     - @link nlohmann::basic_json::accept accept @endlink check for syntax errors without parsing
+    - @link nlohmann::json_sax SAX interface @endlink define a user-defined SAX event consumer
   - [binary formats](binary_formats.md):
     - CBOR: @link nlohmann::basic_json::from_cbor from_cbor @endlink / @link nlohmann::basic_json::to_cbor to_cbor @endlink
     - MessagePack: @link nlohmann::basic_json::from_msgpack from_msgpack @endlink / @link nlohmann::basic_json::to_msgpack to_msgpack @endlink
@@ -304,4 +306,4 @@ Note that this table only lists those exceptions thrown due to the type. For ins
 @author [Niels Lohmann](http://nlohmann.me)
 @see https://github.com/nlohmann/json to download the source code
 
-@version 3.1.2
+@version 3.2.0
diff --git a/doc/json.gif b/doc/json.gif
index 7d2d3c7d..0c00d9fc 100644
Binary files a/doc/json.gif and b/doc/json.gif differ
diff --git a/include/nlohmann/detail/conversions/from_json.hpp b/include/nlohmann/detail/conversions/from_json.hpp
index eccc04f1..5956352f 100644
--- a/include/nlohmann/detail/conversions/from_json.hpp
+++ b/include/nlohmann/detail/conversions/from_json.hpp
@@ -5,21 +5,34 @@
 #include <ciso646> // and, not
 #include <forward_list> // forward_list
 #include <iterator> // inserter, front_inserter, end
+#include <map> // map
 #include <string> // string
 #include <tuple> // tuple, make_tuple
 #include <type_traits> // is_arithmetic, is_same, is_enum, underlying_type, is_convertible
+#include <unordered_map> // unordered_map
 #include <utility> // pair, declval
 #include <valarray> // valarray
 
 #include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
-#include <nlohmann/detail/meta.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
+#include <nlohmann/detail/meta/type_traits.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
 namespace nlohmann
 {
 namespace detail
 {
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
+{
+    if (JSON_UNLIKELY(not j.is_null()))
+    {
+        JSON_THROW(type_error::create(302, "type must be null, but is " + std::string(j.type_name())));
+    }
+    n = nullptr;
+}
+
 // overloads for basic_json template parameters
 template<typename BasicJsonType, typename ArithmeticType,
          enable_if_t<std::is_arithmetic<ArithmeticType>::value and
@@ -70,6 +83,23 @@ void from_json(const BasicJsonType& j, typename BasicJsonType::string_t& s)
     s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
 }
 
+template <
+    typename BasicJsonType, typename CompatibleStringType,
+    enable_if_t <
+        is_compatible_string_type<BasicJsonType, CompatibleStringType>::value and
+        not std::is_same<typename BasicJsonType::string_t,
+                         CompatibleStringType>::value,
+        int > = 0 >
+void from_json(const BasicJsonType& j, CompatibleStringType& s)
+{
+    if (JSON_UNLIKELY(not j.is_string()))
+    {
+        JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name())));
+    }
+
+    s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+
 template<typename BasicJsonType>
 void from_json(const BasicJsonType& j, typename BasicJsonType::number_float_t& val)
 {
@@ -277,6 +307,44 @@ void from_json(const BasicJsonType& j, std::tuple<Args...>& t)
     from_json_tuple_impl(j, t, index_sequence_for<Args...> {});
 }
 
+template <typename BasicJsonType, typename Key, typename Value, typename Compare, typename Allocator,
+          typename = enable_if_t<not std::is_constructible<
+                                     typename BasicJsonType::string_t, Key>::value>>
+void from_json(const BasicJsonType& j, std::map<Key, Value, Compare, Allocator>& m)
+{
+    if (JSON_UNLIKELY(not j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+    }
+    for (const auto& p : j)
+    {
+        if (JSON_UNLIKELY(not p.is_array()))
+        {
+            JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name())));
+        }
+        m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+    }
+}
+
+template <typename BasicJsonType, typename Key, typename Value, typename Hash, typename KeyEqual, typename Allocator,
+          typename = enable_if_t<not std::is_constructible<
+                                     typename BasicJsonType::string_t, Key>::value>>
+void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyEqual, Allocator>& m)
+{
+    if (JSON_UNLIKELY(not j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+    }
+    for (const auto& p : j)
+    {
+        if (JSON_UNLIKELY(not p.is_array()))
+        {
+            JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name())));
+        }
+        m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+    }
+}
+
 struct from_json_fn
 {
   private:
diff --git a/include/nlohmann/detail/conversions/to_chars.hpp b/include/nlohmann/detail/conversions/to_chars.hpp
index 186b62ef..a13d258c 100644
--- a/include/nlohmann/detail/conversions/to_chars.hpp
+++ b/include/nlohmann/detail/conversions/to_chars.hpp
@@ -887,7 +887,7 @@ void grisu2(char* buf, int& len, int& decimal_exponent, FloatType value)
     // numbers, all float's can be recovered using strtod (and strtof). However, the resulting
     // decimal representations are not exactly "short".
     //
-    // The documentation for 'std::to_chars' (http://en.cppreference.com/w/cpp/utility/to_chars)
+    // The documentation for 'std::to_chars' (https://en.cppreference.com/w/cpp/utility/to_chars)
     // says "value is converted to a string as if by std::sprintf in the default ("C") locale"
     // and since sprintf promotes float's to double's, I think this is exactly what 'std::to_chars'
     // does.
diff --git a/include/nlohmann/detail/conversions/to_json.hpp b/include/nlohmann/detail/conversions/to_json.hpp
index ce2bc0aa..35be5de4 100644
--- a/include/nlohmann/detail/conversions/to_json.hpp
+++ b/include/nlohmann/detail/conversions/to_json.hpp
@@ -8,8 +8,10 @@
 #include <valarray> // valarray
 #include <vector> // vector
 
-#include <nlohmann/detail/meta.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
+#include <nlohmann/detail/meta/type_traits.hpp>
 #include <nlohmann/detail/value_t.hpp>
+#include <nlohmann/detail/iterators/iteration_proxy.hpp>
 
 namespace nlohmann
 {
@@ -51,6 +53,16 @@ struct external_constructor<value_t::string>
         j.m_value = std::move(s);
         j.assert_invariant();
     }
+
+    template<typename BasicJsonType, typename CompatibleStringType,
+             enable_if_t<not std::is_same<CompatibleStringType, typename BasicJsonType::string_t>::value,
+                         int> = 0>
+    static void construct(BasicJsonType& j, const CompatibleStringType& str)
+    {
+        j.m_type = value_t::string;
+        j.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
+        j.assert_invariant();
+    }
 };
 
 template<>
@@ -247,7 +259,7 @@ void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
 
 template<typename BasicJsonType, typename T,
          enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
-void to_json(BasicJsonType& j, std::valarray<T> arr)
+void to_json(BasicJsonType& j, const std::valarray<T>& arr)
 {
     external_constructor<value_t::array>::construct(j, std::move(arr));
 }
@@ -284,6 +296,14 @@ void to_json(BasicJsonType& j, const std::pair<Args...>& p)
     j = {p.first, p.second};
 }
 
+// for https://github.com/nlohmann/json/pull/1134
+template<typename BasicJsonType, typename T,
+         enable_if_t<std::is_same<T, typename iteration_proxy<typename BasicJsonType::iterator>::iteration_proxy_internal>::value, int> = 0>
+void to_json(BasicJsonType& j, T b) noexcept
+{
+    j = {{b.key(), b.value()}};
+}
+
 template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
 void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...>)
 {
diff --git a/include/nlohmann/detail/input/binary_reader.hpp b/include/nlohmann/detail/input/binary_reader.hpp
index d4ca38f5..05ab36f3 100644
--- a/include/nlohmann/detail/input/binary_reader.hpp
+++ b/include/nlohmann/detail/input/binary_reader.hpp
@@ -6,18 +6,18 @@
 #include <cmath> // ldexp
 #include <cstddef> // size_t
 #include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
+#include <cstdio> // snprintf
 #include <cstring> // memcpy
-#include <iomanip> // setw, setfill
-#include <ios> // hex
 #include <iterator> // back_inserter
 #include <limits> // numeric_limits
-#include <sstream> // stringstream
 #include <string> // char_traits, string
 #include <utility> // make_pair, move
 
 #include <nlohmann/detail/input/input_adapters.hpp>
+#include <nlohmann/detail/input/json_sax.hpp>
 #include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
+#include <nlohmann/detail/meta/is_sax.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
 namespace nlohmann
@@ -29,14 +29,16 @@ namespace detail
 ///////////////////
 
 /*!
-@brief deserialization of CBOR and MessagePack values
+@brief deserialization of CBOR, MessagePack, and UBJSON values
 */
-template<typename BasicJsonType>
+template<typename BasicJsonType, typename SAX = json_sax_dom_parser<BasicJsonType>>
 class binary_reader
 {
     using number_integer_t = typename BasicJsonType::number_integer_t;
     using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
     using string_t = typename BasicJsonType::string_t;
+    using json_sax_t = SAX;
 
   public:
     /*!
@@ -46,70 +48,63 @@ class binary_reader
     */
     explicit binary_reader(input_adapter_t adapter) : ia(std::move(adapter))
     {
+        (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
         assert(ia);
     }
 
     /*!
-    @brief create a JSON value from CBOR input
-
+    @param[in] format  the binary format to parse
+    @param[in] sax_    a SAX event processor
     @param[in] strict  whether to expect the input to be consumed completed
-    @return JSON value created from CBOR input
 
-    @throw parse_error.110 if input ended unexpectedly or the end of file was
-                           not reached when @a strict was set to true
-    @throw parse_error.112 if unsupported byte was read
+    @return
     */
-    BasicJsonType parse_cbor(const bool strict)
+    bool sax_parse(const input_format_t format,
+                   json_sax_t* sax_,
+                   const bool strict = true)
     {
-        const auto res = parse_cbor_internal();
-        if (strict)
+        sax = sax_;
+        bool result = false;
+
+        switch (format)
         {
-            get();
-            expect_eof();
+            case input_format_t::cbor:
+                result = parse_cbor_internal();
+                break;
+
+            case input_format_t::msgpack:
+                result = parse_msgpack_internal();
+                break;
+
+            case input_format_t::ubjson:
+                result = parse_ubjson_internal();
+                break;
+
+            // LCOV_EXCL_START
+            default:
+                assert(false);
+                // LCOV_EXCL_STOP
         }
-        return res;
-    }
 
-    /*!
-    @brief create a JSON value from MessagePack input
-
-    @param[in] strict  whether to expect the input to be consumed completed
-    @return JSON value created from MessagePack input
-
-    @throw parse_error.110 if input ended unexpectedly or the end of file was
-                           not reached when @a strict was set to true
-    @throw parse_error.112 if unsupported byte was read
-    */
-    BasicJsonType parse_msgpack(const bool strict)
-    {
-        const auto res = parse_msgpack_internal();
-        if (strict)
+        // strict mode: next byte must be EOF
+        if (result and strict)
         {
-            get();
-            expect_eof();
+            if (format == input_format_t::ubjson)
+            {
+                get_ignore_noop();
+            }
+            else
+            {
+                get();
+            }
+
+            if (JSON_UNLIKELY(current != std::char_traits<char>::eof()))
+            {
+                return sax->parse_error(chars_read, get_token_string(), parse_error::create(110, chars_read, "expected end of input"));
+            }
         }
-        return res;
-    }
 
-    /*!
-    @brief create a JSON value from UBJSON input
-
-    @param[in] strict  whether to expect the input to be consumed completed
-    @return JSON value created from UBJSON input
-
-    @throw parse_error.110 if input ended unexpectedly or the end of file was
-                           not reached when @a strict was set to true
-    @throw parse_error.112 if unsupported byte was read
-    */
-    BasicJsonType parse_ubjson(const bool strict)
-    {
-        const auto res = parse_ubjson_internal();
-        if (strict)
-        {
-            get_ignore_noop();
-            expect_eof();
-        }
-        return res;
+        return result;
     }
 
     /*!
@@ -129,14 +124,16 @@ class binary_reader
     @param[in] get_char  whether a new character should be retrieved from the
                          input (true, default) or whether the last read
                          character should be considered instead
+
+    @return whether a valid CBOR value was passed to the SAX parser
     */
-    BasicJsonType parse_cbor_internal(const bool get_char = true)
+    bool parse_cbor_internal(const bool get_char = true)
     {
         switch (get_char ? get() : current)
         {
             // EOF
             case std::char_traits<char>::eof():
-                JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+                return unexpect_eof();
 
             // Integer 0x00..0x17 (0..23)
             case 0x00:
@@ -163,19 +160,31 @@ class binary_reader
             case 0x15:
             case 0x16:
             case 0x17:
-                return static_cast<number_unsigned_t>(current);
+                return sax->number_unsigned(static_cast<number_unsigned_t>(current));
 
             case 0x18: // Unsigned integer (one-byte uint8_t follows)
-                return get_number<uint8_t>();
+            {
+                uint8_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0x19: // Unsigned integer (two-byte uint16_t follows)
-                return get_number<uint16_t>();
+            {
+                uint16_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0x1A: // Unsigned integer (four-byte uint32_t follows)
-                return get_number<uint32_t>();
+            {
+                uint32_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0x1B: // Unsigned integer (eight-byte uint64_t follows)
-                return get_number<uint64_t>();
+            {
+                uint64_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             // Negative integer -1-0x00..-1-0x17 (-1..-24)
             case 0x20:
@@ -202,27 +211,31 @@ class binary_reader
             case 0x35:
             case 0x36:
             case 0x37:
-                return static_cast<int8_t>(0x20 - 1 - current);
+                return sax->number_integer(static_cast<int8_t>(0x20 - 1 - current));
 
             case 0x38: // Negative integer (one-byte uint8_t follows)
             {
-                return static_cast<number_integer_t>(-1) - get_number<uint8_t>();
+                uint8_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
             }
 
             case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
             {
-                return static_cast<number_integer_t>(-1) - get_number<uint16_t>();
+                uint16_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
             }
 
             case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
             {
-                return static_cast<number_integer_t>(-1) - get_number<uint32_t>();
+                uint32_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
             }
 
             case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
             {
-                return static_cast<number_integer_t>(-1) -
-                       static_cast<number_integer_t>(get_number<uint64_t>());
+                uint64_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1)
+                        - static_cast<number_integer_t>(number));
             }
 
             // UTF-8 string (0x00..0x17 bytes follow)
@@ -256,7 +269,8 @@ class binary_reader
             case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
             case 0x7F: // UTF-8 string (indefinite length)
             {
-                return get_cbor_string();
+                string_t s;
+                return get_cbor_string(s) and sax->string(s);
             }
 
             // array (0x00..0x17 data items follow)
@@ -284,39 +298,34 @@ class binary_reader
             case 0x95:
             case 0x96:
             case 0x97:
-            {
-                return get_cbor_array(current & 0x1F);
-            }
+                return get_cbor_array(static_cast<std::size_t>(current & 0x1F));
 
             case 0x98: // array (one-byte uint8_t for n follows)
             {
-                return get_cbor_array(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x99: // array (two-byte uint16_t for n follow)
             {
-                return get_cbor_array(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x9A: // array (four-byte uint32_t for n follow)
             {
-                return get_cbor_array(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x9B: // array (eight-byte uint64_t for n follow)
             {
-                return get_cbor_array(get_number<uint64_t>());
+                uint64_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x9F: // array (indefinite length)
-            {
-                BasicJsonType result = value_t::array;
-                while (get() != 0xFF)
-                {
-                    result.push_back(parse_cbor_internal(false));
-                }
-                return result;
-            }
+                return get_cbor_array(std::size_t(-1));
 
             // map (0x00..0x17 pairs of data items follow)
             case 0xA0:
@@ -343,62 +352,56 @@ class binary_reader
             case 0xB5:
             case 0xB6:
             case 0xB7:
-            {
-                return get_cbor_object(current & 0x1F);
-            }
+                return get_cbor_object(static_cast<std::size_t>(current & 0x1F));
 
             case 0xB8: // map (one-byte uint8_t for n follows)
             {
-                return get_cbor_object(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xB9: // map (two-byte uint16_t for n follow)
             {
-                return get_cbor_object(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xBA: // map (four-byte uint32_t for n follow)
             {
-                return get_cbor_object(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xBB: // map (eight-byte uint64_t for n follow)
             {
-                return get_cbor_object(get_number<uint64_t>());
+                uint64_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xBF: // map (indefinite length)
-            {
-                BasicJsonType result = value_t::object;
-                while (get() != 0xFF)
-                {
-                    auto key = get_cbor_string();
-                    result[key] = parse_cbor_internal();
-                }
-                return result;
-            }
+                return get_cbor_object(std::size_t(-1));
 
             case 0xF4: // false
-            {
-                return false;
-            }
+                return sax->boolean(false);
 
             case 0xF5: // true
-            {
-                return true;
-            }
+                return sax->boolean(true);
 
             case 0xF6: // null
-            {
-                return value_t::null;
-            }
+                return sax->null();
 
             case 0xF9: // Half-Precision Float (two-byte IEEE 754)
             {
                 const int byte1 = get();
-                unexpect_eof();
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
                 const int byte2 = get();
-                unexpect_eof();
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
 
                 // code from RFC 7049, Appendix D, Figure 3:
                 // As half-precision floating-point numbers were only added
@@ -409,51 +412,59 @@ class binary_reader
                 // half-precision floating-point numbers in the C language
                 // is shown in Fig. 3.
                 const int half = (byte1 << 8) + byte2;
-                const int exp = (half >> 10) & 0x1F;
-                const int mant = half & 0x3FF;
-                double val;
-                if (exp == 0)
+                const double val = [&half]
                 {
-                    val = std::ldexp(mant, -24);
-                }
-                else if (exp != 31)
-                {
-                    val = std::ldexp(mant + 1024, exp - 25);
-                }
-                else
-                {
-                    val = (mant == 0) ? std::numeric_limits<double>::infinity()
-                          : std::numeric_limits<double>::quiet_NaN();
-                }
-                return (half & 0x8000) != 0 ? -val : val;
+                    const int exp = (half >> 10) & 0x1F;
+                    const int mant = half & 0x3FF;
+                    assert(0 <= exp and exp <= 32);
+                    assert(0 <= mant and mant <= 1024);
+                    switch (exp)
+                    {
+                        case 0:
+                            return std::ldexp(mant, -24);
+                        case 31:
+                            return (mant == 0)
+                            ? std::numeric_limits<double>::infinity()
+                            : std::numeric_limits<double>::quiet_NaN();
+                        default:
+                            return std::ldexp(mant + 1024, exp - 25);
+                    }
+                }();
+                return sax->number_float((half & 0x8000) != 0
+                                         ? static_cast<number_float_t>(-val)
+                                         : static_cast<number_float_t>(val), "");
             }
 
             case 0xFA: // Single-Precision Float (four-byte IEEE 754)
             {
-                return get_number<float>();
+                float number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
             }
 
             case 0xFB: // Double-Precision Float (eight-byte IEEE 754)
             {
-                return get_number<double>();
+                double number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
             }
 
             default: // anything else (0xFF is handled inside the other types)
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read, "error reading CBOR; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "error reading CBOR; last byte: 0x" + last_token));
             }
         }
     }
 
-    BasicJsonType parse_msgpack_internal()
+    /*!
+    @return whether a valid MessagePack value was passed to the SAX parser
+    */
+    bool parse_msgpack_internal()
     {
         switch (get())
         {
             // EOF
             case std::char_traits<char>::eof():
-                JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+                return unexpect_eof();
 
             // positive fixint
             case 0x00:
@@ -584,7 +595,7 @@ class binary_reader
             case 0x7D:
             case 0x7E:
             case 0x7F:
-                return static_cast<number_unsigned_t>(current);
+                return sax->number_unsigned(static_cast<number_unsigned_t>(current));
 
             // fixmap
             case 0x80:
@@ -603,9 +614,7 @@ class binary_reader
             case 0x8D:
             case 0x8E:
             case 0x8F:
-            {
-                return get_msgpack_object(current & 0x0F);
-            }
+                return get_msgpack_object(static_cast<std::size_t>(current & 0x0F));
 
             // fixarray
             case 0x90:
@@ -624,9 +633,7 @@ class binary_reader
             case 0x9D:
             case 0x9E:
             case 0x9F:
-            {
-                return get_msgpack_array(current & 0x0F);
-            }
+                return get_msgpack_array(static_cast<std::size_t>(current & 0x0F));
 
             // fixstr
             case 0xA0:
@@ -661,73 +668,113 @@ class binary_reader
             case 0xBD:
             case 0xBE:
             case 0xBF:
-                return get_msgpack_string();
+            {
+                string_t s;
+                return get_msgpack_string(s) and sax->string(s);
+            }
 
             case 0xC0: // nil
-                return value_t::null;
+                return sax->null();
 
             case 0xC2: // false
-                return false;
+                return sax->boolean(false);
 
             case 0xC3: // true
-                return true;
+                return sax->boolean(true);
 
             case 0xCA: // float 32
-                return get_number<float>();
+            {
+                float number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
 
             case 0xCB: // float 64
-                return get_number<double>();
+            {
+                double number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
 
             case 0xCC: // uint 8
-                return get_number<uint8_t>();
+            {
+                uint8_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xCD: // uint 16
-                return get_number<uint16_t>();
+            {
+                uint16_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xCE: // uint 32
-                return get_number<uint32_t>();
+            {
+                uint32_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xCF: // uint 64
-                return get_number<uint64_t>();
+            {
+                uint64_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xD0: // int 8
-                return get_number<int8_t>();
+            {
+                int8_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD1: // int 16
-                return get_number<int16_t>();
+            {
+                int16_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD2: // int 32
-                return get_number<int32_t>();
+            {
+                int32_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD3: // int 64
-                return get_number<int64_t>();
+            {
+                int64_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD9: // str 8
             case 0xDA: // str 16
             case 0xDB: // str 32
-                return get_msgpack_string();
+            {
+                string_t s;
+                return get_msgpack_string(s) and sax->string(s);
+            }
 
             case 0xDC: // array 16
             {
-                return get_msgpack_array(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_msgpack_array(static_cast<std::size_t>(len));
             }
 
             case 0xDD: // array 32
             {
-                return get_msgpack_array(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_msgpack_array(static_cast<std::size_t>(len));
             }
 
             case 0xDE: // map 16
             {
-                return get_msgpack_object(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_msgpack_object(static_cast<std::size_t>(len));
             }
 
             case 0xDF: // map 32
             {
-                return get_msgpack_object(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_msgpack_object(static_cast<std::size_t>(len));
             }
 
-            // positive fixint
+            // negative fixint
             case 0xE0:
             case 0xE1:
             case 0xE2:
@@ -760,14 +807,12 @@ class binary_reader
             case 0xFD:
             case 0xFE:
             case 0xFF:
-                return static_cast<int8_t>(current);
+                return sax->number_integer(static_cast<int8_t>(current));
 
             default: // anything else
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read,
-                                               "error reading MessagePack; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "error reading MessagePack; last byte: 0x" + last_token));
             }
         }
     }
@@ -776,8 +821,10 @@ class binary_reader
     @param[in] get_char  whether a new character should be retrieved from the
                          input (true, default) or whether the last read
                          character should be considered instead
+
+    @return whether a valid UBJSON value was passed to the SAX parser
     */
-    BasicJsonType parse_ubjson_internal(const bool get_char = true)
+    bool parse_ubjson_internal(const bool get_char = true)
     {
         return get_ubjson_value(get_char ? get_ignore_noop() : current);
     }
@@ -815,23 +862,26 @@ class binary_reader
     @brief read a number from the input
 
     @tparam NumberType the type of the number
+    @param[out] result  number of type @a NumberType
 
-    @return number of type @a NumberType
+    @return whether conversion completed
 
     @note This function needs to respect the system's endianess, because
-          bytes in CBOR and MessagePack are stored in network order (big
-          endian) and therefore need reordering on little endian systems.
-
-    @throw parse_error.110 if input has less than `sizeof(NumberType)` bytes
+          bytes in CBOR, MessagePack, and UBJSON are stored in network order
+          (big endian) and therefore need reordering on little endian systems.
     */
-    template<typename NumberType> NumberType get_number()
+    template<typename NumberType>
+    bool get_number(NumberType& result)
     {
         // step 1: read input into array with system's byte order
         std::array<uint8_t, sizeof(NumberType)> vec;
         for (std::size_t i = 0; i < sizeof(NumberType); ++i)
         {
             get();
-            unexpect_eof();
+            if (JSON_UNLIKELY(not unexpect_eof()))
+            {
+                return false;
+            }
 
             // reverse byte order prior to conversion if necessary
             if (is_little_endian)
@@ -845,35 +895,37 @@ class binary_reader
         }
 
         // step 2: convert array into number of type T and return
-        NumberType result;
         std::memcpy(&result, vec.data(), sizeof(NumberType));
-        return result;
+        return true;
     }
 
     /*!
     @brief create a string by reading characters from the input
 
-    @param[in] len number of bytes to read
+    @tparam NumberType the type of the number
+    @param[in] len number of characters to read
+    @param[out] string created by reading @a len bytes
+
+    @return whether string creation completed
 
     @note We can not reserve @a len bytes for the result, because @a len
           may be too large. Usually, @ref unexpect_eof() detects the end of
           the input before we run out of string memory.
-
-    @return string created by reading @a len bytes
-
-    @throw parse_error.110 if input has less than @a len bytes
     */
     template<typename NumberType>
-    string_t get_string(const NumberType len)
+    bool get_string(const NumberType len, string_t& result)
     {
-        string_t result;
-        std::generate_n(std::back_inserter(result), len, [this]()
+        bool success = true;
+        std::generate_n(std::back_inserter(result), len, [this, &success]()
         {
             get();
-            unexpect_eof();
+            if (JSON_UNLIKELY(not unexpect_eof()))
+            {
+                success = false;
+            }
             return static_cast<char>(current);
         });
-        return result;
+        return success;
     }
 
     /*!
@@ -883,14 +935,16 @@ class binary_reader
     string length and then copies this number of bytes into a string.
     Additionally, CBOR's strings with indefinite lengths are supported.
 
-    @return string
+    @param[out] result  created string
 
-    @throw parse_error.110 if input ended
-    @throw parse_error.113 if an unexpected byte is read
+    @return whether string creation completed
     */
-    string_t get_cbor_string()
+    bool get_cbor_string(string_t& result)
     {
-        unexpect_eof();
+        if (JSON_UNLIKELY(not unexpect_eof()))
+        {
+            return false;
+        }
 
         switch (current)
         {
@@ -920,73 +974,137 @@ class binary_reader
             case 0x76:
             case 0x77:
             {
-                return get_string(current & 0x1F);
+                return get_string(current & 0x1F, result);
             }
 
             case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
             {
-                return get_string(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
             {
-                return get_string(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
             {
-                return get_string(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
             {
-                return get_string(get_number<uint64_t>());
+                uint64_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x7F: // UTF-8 string (indefinite length)
             {
-                string_t result;
                 while (get() != 0xFF)
                 {
-                    result.append(get_cbor_string());
+                    string_t chunk;
+                    if (not get_cbor_string(chunk))
+                    {
+                        return false;
+                    }
+                    result.append(chunk);
                 }
-                return result;
+                return true;
             }
 
             default:
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(113, chars_read, "expected a CBOR string; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "expected a CBOR string; last byte: 0x" + last_token));
             }
         }
     }
 
-    template<typename NumberType>
-    BasicJsonType get_cbor_array(const NumberType len)
+    /*!
+    @param[in] len  the length of the array or std::size_t(-1) for an
+                    array of indefinite size
+    @return whether array creation completed
+    */
+    bool get_cbor_array(const std::size_t len)
     {
-        BasicJsonType result = value_t::array;
-        std::generate_n(std::back_inserter(*result.m_value.array), len, [this]()
+        if (JSON_UNLIKELY(not sax->start_array(len)))
         {
-            return parse_cbor_internal();
-        });
-        return result;
+            return false;
+        }
+
+        if (len != std::size_t(-1))
+            for (std::size_t i = 0; i < len; ++i)
+            {
+                if (JSON_UNLIKELY(not parse_cbor_internal()))
+                {
+                    return false;
+                }
+            }
+        else
+        {
+            while (get() != 0xFF)
+            {
+                if (JSON_UNLIKELY(not parse_cbor_internal(false)))
+                {
+                    return false;
+                }
+            }
+        }
+
+        return sax->end_array();
     }
 
-    template<typename NumberType>
-    BasicJsonType get_cbor_object(const NumberType len)
+    /*!
+    @param[in] len  the length of the object or std::size_t(-1) for an
+                    object of indefinite size
+    @return whether object creation completed
+    */
+    bool get_cbor_object(const std::size_t len)
     {
-        BasicJsonType result = value_t::object;
-        std::generate_n(std::inserter(*result.m_value.object,
-                                      result.m_value.object->end()),
-                        len, [this]()
+        if (not JSON_UNLIKELY(sax->start_object(len)))
         {
-            get();
-            auto key = get_cbor_string();
-            auto val = parse_cbor_internal();
-            return std::make_pair(std::move(key), std::move(val));
-        });
-        return result;
+            return false;
+        }
+
+        string_t key;
+        if (len != std::size_t(-1))
+        {
+            for (std::size_t i = 0; i < len; ++i)
+            {
+                get();
+                if (JSON_UNLIKELY(not get_cbor_string(key) or not sax->key(key)))
+                {
+                    return false;
+                }
+
+                if (JSON_UNLIKELY(not parse_cbor_internal()))
+                {
+                    return false;
+                }
+                key.clear();
+            }
+        }
+        else
+        {
+            while (get() != 0xFF)
+            {
+                if (JSON_UNLIKELY(not get_cbor_string(key) or not sax->key(key)))
+                {
+                    return false;
+                }
+
+                if (JSON_UNLIKELY(not parse_cbor_internal()))
+                {
+                    return false;
+                }
+                key.clear();
+            }
+        }
+
+        return sax->end_object();
     }
 
     /*!
@@ -995,14 +1113,16 @@ class binary_reader
     This function first reads starting bytes to determine the expected
     string length and then copies this number of bytes into a string.
 
-    @return string
+    @param[out] result  created string
 
-    @throw parse_error.110 if input ended
-    @throw parse_error.113 if an unexpected byte is read
+    @return whether string creation completed
     */
-    string_t get_msgpack_string()
+    bool get_msgpack_string(string_t& result)
     {
-        unexpect_eof();
+        if (JSON_UNLIKELY(not unexpect_eof()))
+        {
+            return false;
+        }
 
         switch (current)
         {
@@ -1040,59 +1160,85 @@ class binary_reader
             case 0xBE:
             case 0xBF:
             {
-                return get_string(current & 0x1F);
+                return get_string(current & 0x1F, result);
             }
 
             case 0xD9: // str 8
             {
-                return get_string(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0xDA: // str 16
             {
-                return get_string(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0xDB: // str 32
             {
-                return get_string(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             default:
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(113, chars_read,
-                                               "expected a MessagePack string; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "expected a MessagePack string; last byte: 0x" + last_token));
             }
         }
     }
 
-    template<typename NumberType>
-    BasicJsonType get_msgpack_array(const NumberType len)
+    /*!
+    @param[in] len  the length of the array
+    @return whether array creation completed
+    */
+    bool get_msgpack_array(const std::size_t len)
     {
-        BasicJsonType result = value_t::array;
-        std::generate_n(std::back_inserter(*result.m_value.array), len, [this]()
+        if (JSON_UNLIKELY(not sax->start_array(len)))
         {
-            return parse_msgpack_internal();
-        });
-        return result;
+            return false;
+        }
+
+        for (std::size_t i = 0; i < len; ++i)
+        {
+            if (JSON_UNLIKELY(not parse_msgpack_internal()))
+            {
+                return false;
+            }
+        }
+
+        return sax->end_array();
     }
 
-    template<typename NumberType>
-    BasicJsonType get_msgpack_object(const NumberType len)
+    /*!
+    @param[in] len  the length of the object
+    @return whether object creation completed
+    */
+    bool get_msgpack_object(const std::size_t len)
     {
-        BasicJsonType result = value_t::object;
-        std::generate_n(std::inserter(*result.m_value.object,
-                                      result.m_value.object->end()),
-                        len, [this]()
+        if (JSON_UNLIKELY(not sax->start_object(len)))
+        {
+            return false;
+        }
+
+        string_t key;
+        for (std::size_t i = 0; i < len; ++i)
         {
             get();
-            auto key = get_msgpack_string();
-            auto val = parse_msgpack_internal();
-            return std::make_pair(std::move(key), std::move(val));
-        });
-        return result;
+            if (JSON_UNLIKELY(not get_msgpack_string(key) or not sax->key(key)))
+            {
+                return false;
+            }
+
+            if (JSON_UNLIKELY(not parse_msgpack_internal()))
+            {
+                return false;
+            }
+            key.clear();
+        }
+
+        return sax->end_object();
     }
 
     /*!
@@ -1102,41 +1248,131 @@ class binary_reader
     indicating a string, or in case of an object key where the 'S' byte can be
     left out.
 
+    @param[out] result   created string
     @param[in] get_char  whether a new character should be retrieved from the
                          input (true, default) or whether the last read
                          character should be considered instead
 
-    @return string
-
-    @throw parse_error.110 if input ended
-    @throw parse_error.113 if an unexpected byte is read
+    @return whether string creation completed
     */
-    string_t get_ubjson_string(const bool get_char = true)
+    bool get_ubjson_string(string_t& result, const bool get_char = true)
     {
         if (get_char)
         {
             get();  // TODO: may we ignore N here?
         }
 
-        unexpect_eof();
+        if (JSON_UNLIKELY(not unexpect_eof()))
+        {
+            return false;
+        }
 
         switch (current)
         {
             case 'U':
-                return get_string(get_number<uint8_t>());
+            {
+                uint8_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'i':
-                return get_string(get_number<int8_t>());
+            {
+                int8_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'I':
-                return get_string(get_number<int16_t>());
+            {
+                int16_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'l':
-                return get_string(get_number<int32_t>());
+            {
+                int32_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'L':
-                return get_string(get_number<int64_t>());
+            {
+                int64_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             default:
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(113, chars_read,
-                                               "expected a UBJSON string; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "expected a UBJSON string; last byte: 0x" + last_token));
+        }
+    }
+
+    /*!
+    @param[out] result  determined size
+    @return whether size determination completed
+    */
+    bool get_ubjson_size_value(std::size_t& result)
+    {
+        switch (get_ignore_noop())
+        {
+            case 'U':
+            {
+                uint8_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'i':
+            {
+                int8_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'I':
+            {
+                int16_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'l':
+            {
+                int32_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'L':
+            {
+                int64_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            default:
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "byte after '#' must denote a number type; last byte: 0x" + last_token));
+            }
         }
     }
 
@@ -1146,84 +1382,127 @@ class binary_reader
     In the optimized UBJSON format, a type and a size can be provided to allow
     for a more compact representation.
 
-    @return pair of the size and the type
+    @param[out] result  pair of the size and the type
+
+    @return whether pair creation completed
     */
-    std::pair<std::size_t, int> get_ubjson_size_type()
+    bool get_ubjson_size_type(std::pair<std::size_t, int>& result)
     {
-        std::size_t sz = string_t::npos;
-        int tc = 0;
+        result.first = string_t::npos; // size
+        result.second = 0; // type
 
         get_ignore_noop();
 
         if (current == '$')
         {
-            tc = get();  // must not ignore 'N', because 'N' maybe the type
-            unexpect_eof();
+            result.second = get();  // must not ignore 'N', because 'N' maybe the type
+            if (JSON_UNLIKELY(not unexpect_eof()))
+            {
+                return false;
+            }
 
             get_ignore_noop();
-            if (current != '#')
+            if (JSON_UNLIKELY(current != '#'))
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read,
-                                               "expected '#' after UBJSON type information; last byte: 0x" + ss.str()));
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "expected '#' after UBJSON type information; last byte: 0x" + last_token));
             }
-            sz = parse_ubjson_internal();
+
+            return get_ubjson_size_value(result.first);
         }
         else if (current == '#')
         {
-            sz = parse_ubjson_internal();
+            return get_ubjson_size_value(result.first);
         }
-
-        return std::make_pair(sz, tc);
+        return true;
     }
 
-    BasicJsonType get_ubjson_value(const int prefix)
+    /*!
+    @param prefix  the previously read or set type prefix
+    @return whether value creation completed
+    */
+    bool get_ubjson_value(const int prefix)
     {
         switch (prefix)
         {
             case std::char_traits<char>::eof():  // EOF
-                JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+                return unexpect_eof();
 
             case 'T':  // true
-                return true;
+                return sax->boolean(true);
             case 'F':  // false
-                return false;
+                return sax->boolean(false);
 
             case 'Z':  // null
-                return nullptr;
+                return sax->null();
 
             case 'U':
-                return get_number<uint8_t>();
+            {
+                uint8_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
+
             case 'i':
-                return get_number<int8_t>();
+            {
+                int8_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'I':
-                return get_number<int16_t>();
+            {
+                int16_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'l':
-                return get_number<int32_t>();
+            {
+                int32_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'L':
-                return get_number<int64_t>();
+            {
+                int64_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'd':
-                return get_number<float>();
+            {
+                float number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
             case 'D':
-                return get_number<double>();
+            {
+                double number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
 
             case 'C':  // char
             {
                 get();
-                unexpect_eof();
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
                 if (JSON_UNLIKELY(current > 127))
                 {
-                    std::stringstream ss;
-                    ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                    JSON_THROW(parse_error::create(113, chars_read,
-                                                   "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + ss.str()));
+                    auto last_token = get_token_string();
+                    return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + last_token));
                 }
-                return string_t(1, static_cast<char>(current));
+                string_t s(1, static_cast<char>(current));
+                return sax->string(s);
             }
 
             case 'S':  // string
-                return get_ubjson_string();
+            {
+                string_t s;
+                return get_ubjson_string(s) and sax->string(s);
+            }
 
             case '[':  // array
                 return get_ubjson_array();
@@ -1232,129 +1511,170 @@ class binary_reader
                 return get_ubjson_object();
 
             default: // anything else
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read,
-                                               "error reading UBJSON; last byte: 0x" + ss.str()));
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "error reading UBJSON; last byte: 0x" + last_token));
+            }
         }
     }
 
-    BasicJsonType get_ubjson_array()
+    /*!
+    @return whether array creation completed
+    */
+    bool get_ubjson_array()
     {
-        BasicJsonType result = value_t::array;
-        const auto size_and_type = get_ubjson_size_type();
+        std::pair<std::size_t, int> size_and_type;
+        if (JSON_UNLIKELY(not get_ubjson_size_type(size_and_type)))
+        {
+            return false;
+        }
 
         if (size_and_type.first != string_t::npos)
         {
-            if (JSON_UNLIKELY(size_and_type.first > result.max_size()))
+            if (JSON_UNLIKELY(not sax->start_array(size_and_type.first)))
             {
-                JSON_THROW(out_of_range::create(408,
-                                                "excessive array size: " + std::to_string(size_and_type.first)));
+                return false;
             }
 
             if (size_and_type.second != 0)
             {
                 if (size_and_type.second != 'N')
                 {
-                    std::generate_n(std::back_inserter(*result.m_value.array),
-                                    size_and_type.first, [this, size_and_type]()
+                    for (std::size_t i = 0; i < size_and_type.first; ++i)
                     {
-                        return get_ubjson_value(size_and_type.second);
-                    });
+                        if (JSON_UNLIKELY(not get_ubjson_value(size_and_type.second)))
+                        {
+                            return false;
+                        }
+                    }
                 }
             }
             else
             {
-                std::generate_n(std::back_inserter(*result.m_value.array),
-                                size_and_type.first, [this]()
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
                 {
-                    return parse_ubjson_internal();
-                });
+                    if (JSON_UNLIKELY(not parse_ubjson_internal()))
+                    {
+                        return false;
+                    }
+                }
             }
         }
         else
         {
+            if (JSON_UNLIKELY(not sax->start_array(std::size_t(-1))))
+            {
+                return false;
+            }
+
             while (current != ']')
             {
-                result.push_back(parse_ubjson_internal(false));
+                if (JSON_UNLIKELY(not parse_ubjson_internal(false)))
+                {
+                    return false;
+                }
                 get_ignore_noop();
             }
         }
 
-        return result;
+        return sax->end_array();
     }
 
-    BasicJsonType get_ubjson_object()
+    /*!
+    @return whether object creation completed
+    */
+    bool get_ubjson_object()
     {
-        BasicJsonType result = value_t::object;
-        const auto size_and_type = get_ubjson_size_type();
+        std::pair<std::size_t, int> size_and_type;
+        if (JSON_UNLIKELY(not get_ubjson_size_type(size_and_type)))
+        {
+            return false;
+        }
 
+        string_t key;
         if (size_and_type.first != string_t::npos)
         {
-            if (JSON_UNLIKELY(size_and_type.first > result.max_size()))
+            if (JSON_UNLIKELY(not sax->start_object(size_and_type.first)))
             {
-                JSON_THROW(out_of_range::create(408,
-                                                "excessive object size: " + std::to_string(size_and_type.first)));
+                return false;
             }
 
             if (size_and_type.second != 0)
             {
-                std::generate_n(std::inserter(*result.m_value.object,
-                                              result.m_value.object->end()),
-                                size_and_type.first, [this, size_and_type]()
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
                 {
-                    auto key = get_ubjson_string();
-                    auto val = get_ubjson_value(size_and_type.second);
-                    return std::make_pair(std::move(key), std::move(val));
-                });
+                    if (JSON_UNLIKELY(not get_ubjson_string(key) or not sax->key(key)))
+                    {
+                        return false;
+                    }
+                    if (JSON_UNLIKELY(not get_ubjson_value(size_and_type.second)))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
             }
             else
             {
-                std::generate_n(std::inserter(*result.m_value.object,
-                                              result.m_value.object->end()),
-                                size_and_type.first, [this]()
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
                 {
-                    auto key = get_ubjson_string();
-                    auto val = parse_ubjson_internal();
-                    return std::make_pair(std::move(key), std::move(val));
-                });
+                    if (JSON_UNLIKELY(not get_ubjson_string(key) or not sax->key(key)))
+                    {
+                        return false;
+                    }
+                    if (JSON_UNLIKELY(not parse_ubjson_internal()))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
             }
         }
         else
         {
+            if (JSON_UNLIKELY(not sax->start_object(std::size_t(-1))))
+            {
+                return false;
+            }
+
             while (current != '}')
             {
-                auto key = get_ubjson_string(false);
-                result[std::move(key)] = parse_ubjson_internal();
+                if (JSON_UNLIKELY(not get_ubjson_string(key, false) or not sax->key(key)))
+                {
+                    return false;
+                }
+                if (JSON_UNLIKELY(not parse_ubjson_internal()))
+                {
+                    return false;
+                }
                 get_ignore_noop();
+                key.clear();
             }
         }
 
-        return result;
+        return sax->end_object();
     }
 
     /*!
-    @brief throw if end of input is not reached
-    @throw parse_error.110 if input not ended
+    @return whether the last read character is not EOF
     */
-    void expect_eof() const
-    {
-        if (JSON_UNLIKELY(current != std::char_traits<char>::eof()))
-        {
-            JSON_THROW(parse_error::create(110, chars_read, "expected end of input"));
-        }
-    }
-
-    /*!
-    @briefthrow if end of input is reached
-    @throw parse_error.110 if input ended
-    */
-    void unexpect_eof() const
+    bool unexpect_eof() const
     {
         if (JSON_UNLIKELY(current == std::char_traits<char>::eof()))
         {
-            JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+            return sax->parse_error(chars_read, "<end of file>", parse_error::create(110, chars_read, "unexpected end of input"));
         }
+        return true;
+    }
+
+    /*!
+    @return a string representation of the last read byte
+    */
+    std::string get_token_string() const
+    {
+        char cr[3];
+        snprintf(cr, 3, "%.2hhX", static_cast<unsigned char>(current));
+        return std::string{cr};
     }
 
   private:
@@ -1369,6 +1689,9 @@ class binary_reader
 
     /// whether we can assume little endianess
     const bool is_little_endian = little_endianess();
+
+    /// the SAX parser
+    json_sax_t* sax = nullptr;
 };
 }
 }
diff --git a/include/nlohmann/detail/input/input_adapters.hpp b/include/nlohmann/detail/input/input_adapters.hpp
index ef66948d..01bec749 100644
--- a/include/nlohmann/detail/input/input_adapters.hpp
+++ b/include/nlohmann/detail/input/input_adapters.hpp
@@ -1,11 +1,8 @@
 #pragma once
 
-#include <algorithm> // min
-#include <array> // array
 #include <cassert> // assert
 #include <cstddef> // size_t
 #include <cstring> // strlen
-#include <ios> // streamsize, streamoff, streampos
 #include <istream> // istream
 #include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
 #include <memory> // shared_ptr, make_shared, addressof
@@ -20,6 +17,9 @@ namespace nlohmann
 {
 namespace detail
 {
+/// the supported input formats
+enum class input_format_t { json, cbor, msgpack, ubjson };
+
 ////////////////////
 // input adapters //
 ////////////////////
@@ -28,19 +28,17 @@ namespace detail
 @brief abstract input adapter interface
 
 Produces a stream of std::char_traits<char>::int_type characters from a
-std::istream, a buffer, or some other input type.  Accepts the return of exactly
-one non-EOF character for future input.  The int_type characters returned
-consist of all valid char values as positive values (typically unsigned char),
-plus an EOF value outside that range, specified by the value of the function
-std::char_traits<char>::eof().  This value is typically -1, but could be any
-arbitrary value which is not a valid char value.
+std::istream, a buffer, or some other input type. Accepts the return of
+exactly one non-EOF character for future input. The int_type characters
+returned consist of all valid char values as positive values (typically
+unsigned char), plus an EOF value outside that range, specified by the value
+of the function std::char_traits<char>::eof(). This value is typically -1, but
+could be any arbitrary value which is not a valid char value.
 */
 struct input_adapter_protocol
 {
     /// get a character [0,255] or std::char_traits<char>::eof().
     virtual std::char_traits<char>::int_type get_character() = 0;
-    /// restore the last non-eof() character to input
-    virtual void unget_character() = 0;
     virtual ~input_adapter_protocol() = default;
 };
 
@@ -68,34 +66,7 @@ class input_stream_adapter : public input_adapter_protocol
 
     explicit input_stream_adapter(std::istream& i)
         : is(i), sb(*i.rdbuf())
-    {
-        // skip byte order mark
-        std::char_traits<char>::int_type c;
-        if ((c = get_character()) == 0xEF)
-        {
-            if ((c = get_character()) == 0xBB)
-            {
-                if ((c = get_character()) == 0xBF)
-                {
-                    return; // Ignore BOM
-                }
-                else if (c != std::char_traits<char>::eof())
-                {
-                    is.unget();
-                }
-                is.putback('\xBB');
-            }
-            else if (c != std::char_traits<char>::eof())
-            {
-                is.unget();
-            }
-            is.putback('\xEF');
-        }
-        else if (c != std::char_traits<char>::eof())
-        {
-            is.unget(); // no byte order mark; process as usual
-        }
-    }
+    {}
 
     // delete because of pointer members
     input_stream_adapter(const input_stream_adapter&) = delete;
@@ -109,11 +80,6 @@ class input_stream_adapter : public input_adapter_protocol
         return sb.sbumpc();
     }
 
-    void unget_character() override
-    {
-        sb.sungetc();  // is.unget() avoided for performance
-    }
-
   private:
     /// the associated input stream
     std::istream& is;
@@ -125,14 +91,8 @@ class input_buffer_adapter : public input_adapter_protocol
 {
   public:
     input_buffer_adapter(const char* b, const std::size_t l)
-        : cursor(b), limit(b + l), start(b)
-    {
-        // skip byte order mark
-        if (l >= 3 and b[0] == '\xEF' and b[1] == '\xBB' and b[2] == '\xBF')
-        {
-            cursor += 3;
-        }
-    }
+        : cursor(b), limit(b + l)
+    {}
 
     // delete because of pointer members
     input_buffer_adapter(const input_buffer_adapter&) = delete;
@@ -148,21 +108,164 @@ class input_buffer_adapter : public input_adapter_protocol
         return std::char_traits<char>::eof();
     }
 
-    void unget_character() noexcept override
-    {
-        if (JSON_LIKELY(cursor > start))
-        {
-            --cursor;
-        }
-    }
-
   private:
     /// pointer to the current character
     const char* cursor;
     /// pointer past the last character
-    const char* limit;
-    /// pointer to the first character
-    const char* start;
+    const char* const limit;
+};
+
+template<typename WideStringType>
+class wide_string_input_adapter : public input_adapter_protocol
+{
+  public:
+    explicit wide_string_input_adapter(const WideStringType& w) : str(w) {}
+
+    std::char_traits<char>::int_type get_character() noexcept override
+    {
+        // check if buffer needs to be filled
+        if (utf8_bytes_index == utf8_bytes_filled)
+        {
+            if (sizeof(typename WideStringType::value_type) == 2)
+            {
+                fill_buffer_utf16();
+            }
+            else
+            {
+                fill_buffer_utf32();
+            }
+
+            assert(utf8_bytes_filled > 0);
+            assert(utf8_bytes_index == 0);
+        }
+
+        // use buffer
+        assert(utf8_bytes_filled > 0);
+        assert(utf8_bytes_index < utf8_bytes_filled);
+        return utf8_bytes[utf8_bytes_index++];
+    }
+
+  private:
+    void fill_buffer_utf16()
+    {
+        utf8_bytes_index = 0;
+
+        if (current_wchar == str.size())
+        {
+            utf8_bytes[0] = std::char_traits<char>::eof();
+            utf8_bytes_filled = 1;
+        }
+        else
+        {
+            // get the current character
+            const int wc = static_cast<int>(str[current_wchar++]);
+
+            // UTF-16 to UTF-8 encoding
+            if (wc < 0x80)
+            {
+                utf8_bytes[0] = wc;
+                utf8_bytes_filled = 1;
+            }
+            else if (wc <= 0x7FF)
+            {
+                utf8_bytes[0] = 0xC0 | ((wc >> 6));
+                utf8_bytes[1] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 2;
+            }
+            else if (0xD800 > wc or wc >= 0xE000)
+            {
+                utf8_bytes[0] = 0xE0 | ((wc >> 12));
+                utf8_bytes[1] = 0x80 | ((wc >> 6) & 0x3F);
+                utf8_bytes[2] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 3;
+            }
+            else
+            {
+                if (current_wchar < str.size())
+                {
+                    const int wc2 = static_cast<int>(str[current_wchar++]);
+                    const int charcode = 0x10000 + (((wc & 0x3FF) << 10) | (wc2 & 0x3FF));
+                    utf8_bytes[0] = 0xf0 | (charcode >> 18);
+                    utf8_bytes[1] = 0x80 | ((charcode >> 12) & 0x3F);
+                    utf8_bytes[2] = 0x80 | ((charcode >> 6) & 0x3F);
+                    utf8_bytes[3] = 0x80 | (charcode & 0x3F);
+                    utf8_bytes_filled = 4;
+                }
+                else
+                {
+                    // unknown character
+                    ++current_wchar;
+                    utf8_bytes[0] = wc;
+                    utf8_bytes_filled = 1;
+                }
+            }
+        }
+    }
+
+    void fill_buffer_utf32()
+    {
+        utf8_bytes_index = 0;
+
+        if (current_wchar == str.size())
+        {
+            utf8_bytes[0] = std::char_traits<char>::eof();
+            utf8_bytes_filled = 1;
+        }
+        else
+        {
+            // get the current character
+            const int wc = static_cast<int>(str[current_wchar++]);
+
+            // UTF-32 to UTF-8 encoding
+            if (wc < 0x80)
+            {
+                utf8_bytes[0] = wc;
+                utf8_bytes_filled = 1;
+            }
+            else if (wc <= 0x7FF)
+            {
+                utf8_bytes[0] = 0xC0 | ((wc >> 6) & 0x1F);
+                utf8_bytes[1] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 2;
+            }
+            else if (wc <= 0xFFFF)
+            {
+                utf8_bytes[0] = 0xE0 | ((wc >> 12) & 0x0F);
+                utf8_bytes[1] = 0x80 | ((wc >> 6) & 0x3F);
+                utf8_bytes[2] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 3;
+            }
+            else if (wc <= 0x10FFFF)
+            {
+                utf8_bytes[0] = 0xF0 | ((wc >> 18 ) & 0x07);
+                utf8_bytes[1] = 0x80 | ((wc >> 12) & 0x3F);
+                utf8_bytes[2] = 0x80 | ((wc >> 6) & 0x3F);
+                utf8_bytes[3] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 4;
+            }
+            else
+            {
+                // unknown character
+                utf8_bytes[0] = wc;
+                utf8_bytes_filled = 1;
+            }
+        }
+    }
+
+  private:
+    /// the wstring to process
+    const WideStringType& str;
+
+    /// index of the current wchar in str
+    std::size_t current_wchar = 0;
+
+    /// a buffer for UTF-8 bytes
+    std::array<std::char_traits<char>::int_type, 4> utf8_bytes = {{0, 0, 0, 0}};
+
+    /// index to the utf8_codes array for the next valid byte
+    std::size_t utf8_bytes_index = 0;
+    /// number of valid bytes in the utf8_codes array
+    std::size_t utf8_bytes_filled = 0;
 };
 
 class input_adapter
@@ -178,6 +281,15 @@ class input_adapter
     input_adapter(std::istream&& i)
         : ia(std::make_shared<input_stream_adapter>(i)) {}
 
+    input_adapter(const std::wstring& ws)
+        : ia(std::make_shared<wide_string_input_adapter<std::wstring>>(ws)) {}
+
+    input_adapter(const std::u16string& ws)
+        : ia(std::make_shared<wide_string_input_adapter<std::u16string>>(ws)) {}
+
+    input_adapter(const std::u32string& ws)
+        : ia(std::make_shared<wide_string_input_adapter<std::u32string>>(ws)) {}
+
     /// input adapter for buffer
     template<typename CharT,
              typename std::enable_if<
diff --git a/include/nlohmann/detail/input/json_sax.hpp b/include/nlohmann/detail/input/json_sax.hpp
new file mode 100644
index 00000000..1705a861
--- /dev/null
+++ b/include/nlohmann/detail/input/json_sax.hpp
@@ -0,0 +1,702 @@
+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <vector>
+
+#include <nlohmann/detail/input/parser.hpp>
+#include <nlohmann/detail/exceptions.hpp>
+
+namespace nlohmann
+{
+
+/*!
+@brief SAX interface
+
+This class describes the SAX interface used by @ref nlohmann::json::sax_parse.
+Each function is called in different situations while the input is parsed. The
+boolean return value informs the parser whether to continue processing the
+input.
+*/
+template<typename BasicJsonType>
+struct json_sax
+{
+    /// type for (signed) integers
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    /// type for unsigned integers
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    /// type for floating-point numbers
+    using number_float_t = typename BasicJsonType::number_float_t;
+    /// type for strings
+    using string_t = typename BasicJsonType::string_t;
+
+    /*!
+    @brief a null value was read
+    @return whether parsing should proceed
+    */
+    virtual bool null() = 0;
+
+    /*!
+    @brief a boolean value was read
+    @param[in] val  boolean value
+    @return whether parsing should proceed
+    */
+    virtual bool boolean(bool val) = 0;
+
+    /*!
+    @brief an integer number was read
+    @param[in] val  integer value
+    @return whether parsing should proceed
+    */
+    virtual bool number_integer(number_integer_t val) = 0;
+
+    /*!
+    @brief an unsigned integer number was read
+    @param[in] val  unsigned integer value
+    @return whether parsing should proceed
+    */
+    virtual bool number_unsigned(number_unsigned_t val) = 0;
+
+    /*!
+    @brief an floating-point number was read
+    @param[in] val  floating-point value
+    @param[in] s    raw token value
+    @return whether parsing should proceed
+    */
+    virtual bool number_float(number_float_t val, const string_t& s) = 0;
+
+    /*!
+    @brief a string was read
+    @param[in] val  string value
+    @return whether parsing should proceed
+    @note It is safe to move the passed string.
+    */
+    virtual bool string(string_t& val) = 0;
+
+    /*!
+    @brief the beginning of an object was read
+    @param[in] elements  number of object elements or -1 if unknown
+    @return whether parsing should proceed
+    @note binary formats may report the number of elements
+    */
+    virtual bool start_object(std::size_t elements) = 0;
+
+    /*!
+    @brief an object key was read
+    @param[in] val  object key
+    @return whether parsing should proceed
+    @note It is safe to move the passed string.
+    */
+    virtual bool key(string_t& val) = 0;
+
+    /*!
+    @brief the end of an object was read
+    @return whether parsing should proceed
+    */
+    virtual bool end_object() = 0;
+
+    /*!
+    @brief the beginning of an array was read
+    @param[in] elements  number of array elements or -1 if unknown
+    @return whether parsing should proceed
+    @note binary formats may report the number of elements
+    */
+    virtual bool start_array(std::size_t elements) = 0;
+
+    /*!
+    @brief the end of an array was read
+    @return whether parsing should proceed
+    */
+    virtual bool end_array() = 0;
+
+    /*!
+    @brief a parse error occurred
+    @param[in] position    the position in the input where the error occurs
+    @param[in] last_token  the last read token
+    @param[in] error_msg   a detailed error message
+    @return whether parsing should proceed (must return false)
+    */
+    virtual bool parse_error(std::size_t position,
+                             const std::string& last_token,
+                             const detail::exception& ex) = 0;
+
+    virtual ~json_sax() = default;
+};
+
+
+namespace detail
+{
+/*!
+@brief SAX implementation to create a JSON value from SAX events
+
+This class implements the @ref json_sax interface and processes the SAX events
+to create a JSON value which makes it basically a DOM parser. The structure or
+hierarchy of the JSON value is managed by the stack `ref_stack` which contains
+a pointer to the respective array or object for each recursion depth.
+
+After successful parsing, the value that is passed by reference to the
+constructor contains the parsed value.
+
+@tparam BasicJsonType  the JSON type
+*/
+template<typename BasicJsonType>
+class json_sax_dom_parser
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+
+    /*!
+    @param[in, out] r  reference to a JSON value that is manipulated while
+                       parsing
+    @param[in] allow_exceptions_  whether parse errors yield exceptions
+    */
+    explicit json_sax_dom_parser(BasicJsonType& r, const bool allow_exceptions_ = true)
+        : root(r), allow_exceptions(allow_exceptions_)
+    {}
+
+    bool null()
+    {
+        handle_value(nullptr);
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_integer(number_integer_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t&)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool string(string_t& val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool start_object(std::size_t len)
+    {
+        ref_stack.push_back(handle_value(BasicJsonType::value_t::object));
+
+        if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408,
+                                            "excessive object size: " + std::to_string(len)));
+        }
+
+        return true;
+    }
+
+    bool key(string_t& val)
+    {
+        // add null at given key and store the reference for later
+        object_element = &(ref_stack.back()->m_value.object->operator[](val));
+        return true;
+    }
+
+    bool end_object()
+    {
+        ref_stack.pop_back();
+        return true;
+    }
+
+    bool start_array(std::size_t len)
+    {
+        ref_stack.push_back(handle_value(BasicJsonType::value_t::array));
+
+        if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408,
+                                            "excessive array size: " + std::to_string(len)));
+        }
+
+        return true;
+    }
+
+    bool end_array()
+    {
+        ref_stack.pop_back();
+        return true;
+    }
+
+    bool parse_error(std::size_t, const std::string&,
+                     const detail::exception& ex)
+    {
+        errored = true;
+        if (allow_exceptions)
+        {
+            // determine the proper exception type from the id
+            switch ((ex.id / 100) % 100)
+            {
+                case 1:
+                    JSON_THROW(*reinterpret_cast<const detail::parse_error*>(&ex));
+                case 4:
+                    JSON_THROW(*reinterpret_cast<const detail::out_of_range*>(&ex));
+                // LCOV_EXCL_START
+                case 2:
+                    JSON_THROW(*reinterpret_cast<const detail::invalid_iterator*>(&ex));
+                case 3:
+                    JSON_THROW(*reinterpret_cast<const detail::type_error*>(&ex));
+                case 5:
+                    JSON_THROW(*reinterpret_cast<const detail::other_error*>(&ex));
+                default:
+                    assert(false);
+                    // LCOV_EXCL_STOP
+            }
+        }
+        return false;
+    }
+
+    constexpr bool is_errored() const
+    {
+        return errored;
+    }
+
+  private:
+    /*!
+    @invariant If the ref stack is empty, then the passed value will be the new
+               root.
+    @invariant If the ref stack contains a value, then it is an array or an
+               object to which we can add elements
+    */
+    template<typename Value>
+    BasicJsonType* handle_value(Value&& v)
+    {
+        if (ref_stack.empty())
+        {
+            root = BasicJsonType(std::forward<Value>(v));
+            return &root;
+        }
+        else
+        {
+            assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
+            if (ref_stack.back()->is_array())
+            {
+                ref_stack.back()->m_value.array->emplace_back(std::forward<Value>(v));
+                return &(ref_stack.back()->m_value.array->back());
+            }
+            else
+            {
+                assert(object_element);
+                *object_element = BasicJsonType(std::forward<Value>(v));
+                return object_element;
+            }
+        }
+    }
+
+    /// the parsed JSON value
+    BasicJsonType& root;
+    /// stack to model hierarchy of values
+    std::vector<BasicJsonType*> ref_stack;
+    /// helper to hold the reference for the next object element
+    BasicJsonType* object_element = nullptr;
+    /// whether a syntax error occurred
+    bool errored = false;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+};
+
+template<typename BasicJsonType>
+class json_sax_dom_callback_parser
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using parser_callback_t = typename BasicJsonType::parser_callback_t;
+    using parse_event_t = typename BasicJsonType::parse_event_t;
+
+    json_sax_dom_callback_parser(BasicJsonType& r,
+                                 const parser_callback_t cb,
+                                 const bool allow_exceptions_ = true)
+        : root(r), callback(cb), allow_exceptions(allow_exceptions_)
+    {
+        keep_stack.push_back(true);
+    }
+
+    bool null()
+    {
+        handle_value(nullptr);
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_integer(number_integer_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t&)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool string(string_t& val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool start_object(std::size_t len)
+    {
+        // check callback for object start
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::object_start, discarded);
+        keep_stack.push_back(keep);
+
+        auto val = handle_value(BasicJsonType::value_t::object, true);
+        ref_stack.push_back(val.second);
+
+        // check object limit
+        if (ref_stack.back())
+        {
+            if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+            {
+                JSON_THROW(out_of_range::create(408,
+                                                "excessive object size: " + std::to_string(len)));
+            }
+        }
+
+        return true;
+    }
+
+    bool key(string_t& val)
+    {
+        BasicJsonType k = BasicJsonType(val);
+
+        // check callback for key
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::key, k);
+        key_keep_stack.push_back(keep);
+
+        // add discarded value at given key and store the reference for later
+        if (keep and ref_stack.back())
+        {
+            object_element = &(ref_stack.back()->m_value.object->operator[](val) = discarded);
+        }
+
+        return true;
+    }
+
+    bool end_object()
+    {
+        if (ref_stack.back())
+        {
+            if (not callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::object_end, *ref_stack.back()))
+            {
+                // discard object
+                *ref_stack.back() = discarded;
+            }
+        }
+
+        assert(not ref_stack.empty());
+        assert(not keep_stack.empty());
+        ref_stack.pop_back();
+        keep_stack.pop_back();
+
+        if (not ref_stack.empty() and ref_stack.back())
+        {
+            // remove discarded value
+            if (ref_stack.back()->is_object())
+            {
+                for (auto it = ref_stack.back()->begin(); it != ref_stack.back()->end(); ++it)
+                {
+                    if (it->is_discarded())
+                    {
+                        ref_stack.back()->erase(it);
+                        break;
+                    }
+                }
+            }
+        }
+
+        return true;
+    }
+
+    bool start_array(std::size_t len)
+    {
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::array_start, discarded);
+        keep_stack.push_back(keep);
+
+        auto val = handle_value(BasicJsonType::value_t::array, true);
+        ref_stack.push_back(val.second);
+
+        // check array limit
+        if (ref_stack.back())
+        {
+            if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+            {
+                JSON_THROW(out_of_range::create(408,
+                                                "excessive array size: " + std::to_string(len)));
+            }
+        }
+
+        return true;
+    }
+
+    bool end_array()
+    {
+        bool keep = true;
+
+        if (ref_stack.back())
+        {
+            keep = callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::array_end, *ref_stack.back());
+            if (not keep)
+            {
+                // discard array
+                *ref_stack.back() = discarded;
+            }
+        }
+
+        assert(not ref_stack.empty());
+        assert(not keep_stack.empty());
+        ref_stack.pop_back();
+        keep_stack.pop_back();
+
+        // remove discarded value
+        if (not keep and not ref_stack.empty())
+        {
+            if (ref_stack.back()->is_array())
+            {
+                ref_stack.back()->m_value.array->pop_back();
+            }
+        }
+
+        return true;
+    }
+
+    bool parse_error(std::size_t, const std::string&,
+                     const detail::exception& ex)
+    {
+        errored = true;
+        if (allow_exceptions)
+        {
+            // determine the proper exception type from the id
+            switch ((ex.id / 100) % 100)
+            {
+                case 1:
+                    JSON_THROW(*reinterpret_cast<const detail::parse_error*>(&ex));
+                case 4:
+                    JSON_THROW(*reinterpret_cast<const detail::out_of_range*>(&ex));
+                // LCOV_EXCL_START
+                case 2:
+                    JSON_THROW(*reinterpret_cast<const detail::invalid_iterator*>(&ex));
+                case 3:
+                    JSON_THROW(*reinterpret_cast<const detail::type_error*>(&ex));
+                case 5:
+                    JSON_THROW(*reinterpret_cast<const detail::other_error*>(&ex));
+                default:
+                    assert(false);
+                    // LCOV_EXCL_STOP
+            }
+        }
+        return false;
+    }
+
+    constexpr bool is_errored() const
+    {
+        return errored;
+    }
+
+  private:
+    /*!
+    @param[in] v  value to add to the JSON value we build during parsing
+    @param[in] skip_callback  whether we should skip calling the callback
+               function; this is required after start_array() and
+               start_object() SAX events, because otherwise we would call the
+               callback function with an empty array or object, respectively.
+
+    @invariant If the ref stack is empty, then the passed value will be the new
+               root.
+    @invariant If the ref stack contains a value, then it is an array or an
+               object to which we can add elements
+
+    @return pair of boolean (whether value should be kept) and pointer (to the
+            passed value in the ref_stack hierarchy; nullptr if not kept)
+    */
+    template<typename Value>
+    std::pair<bool, BasicJsonType*> handle_value(Value&& v, const bool skip_callback = false)
+    {
+        assert(not keep_stack.empty());
+
+        // do not handle this value if we know it would be added to a discarded
+        // container
+        if (not keep_stack.back())
+        {
+            return {false, nullptr};
+        }
+
+        // create value
+        auto value = BasicJsonType(std::forward<Value>(v));
+
+        // check callback
+        const bool keep = skip_callback or callback(static_cast<int>(ref_stack.size()), parse_event_t::value, value);
+
+        // do not handle this value if we just learnt it shall be discarded
+        if (not keep)
+        {
+            return {false, nullptr};
+        }
+
+        if (ref_stack.empty())
+        {
+            root = std::move(value);
+            return {true, &root};
+        }
+        else
+        {
+            // skip this value if we already decided to skip the parent
+            // (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)
+            if (not ref_stack.back())
+            {
+                return {false, nullptr};
+            }
+
+            assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
+            if (ref_stack.back()->is_array())
+            {
+                ref_stack.back()->m_value.array->push_back(std::move(value));
+                return {true, &(ref_stack.back()->m_value.array->back())};
+            }
+            else
+            {
+                // check if we should store an element for the current key
+                assert(not key_keep_stack.empty());
+                const bool store_element = key_keep_stack.back();
+                key_keep_stack.pop_back();
+
+                if (not store_element)
+                {
+                    return {false, nullptr};
+                }
+
+                assert(object_element);
+                *object_element = std::move(value);
+                return {true, object_element};
+            }
+        }
+    }
+
+    /// the parsed JSON value
+    BasicJsonType& root;
+    /// stack to model hierarchy of values
+    std::vector<BasicJsonType*> ref_stack;
+    /// stack to manage which values to keep
+    std::vector<bool> keep_stack;
+    /// stack to manage which object keys to keep
+    std::vector<bool> key_keep_stack;
+    /// helper to hold the reference for the next object element
+    BasicJsonType* object_element = nullptr;
+    /// whether a syntax error occurred
+    bool errored = false;
+    /// callback function
+    const parser_callback_t callback = nullptr;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+    /// a discarded value for the callback
+    BasicJsonType discarded = BasicJsonType::value_t::discarded;
+};
+
+template<typename BasicJsonType>
+class json_sax_acceptor
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+
+    bool null()
+    {
+        return true;
+    }
+
+    bool boolean(bool)
+    {
+        return true;
+    }
+
+    bool number_integer(number_integer_t)
+    {
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t)
+    {
+        return true;
+    }
+
+    bool number_float(number_float_t, const string_t&)
+    {
+        return true;
+    }
+
+    bool string(string_t&)
+    {
+        return true;
+    }
+
+    bool start_object(std::size_t = std::size_t(-1))
+    {
+        return true;
+    }
+
+    bool key(string_t&)
+    {
+        return true;
+    }
+
+    bool end_object()
+    {
+        return true;
+    }
+
+    bool start_array(std::size_t = std::size_t(-1))
+    {
+        return true;
+    }
+
+    bool end_array()
+    {
+        return true;
+    }
+
+    bool parse_error(std::size_t, const std::string&, const detail::exception&)
+    {
+        return false;
+    }
+};
+}
+
+}
diff --git a/include/nlohmann/detail/input/lexer.hpp b/include/nlohmann/detail/input/lexer.hpp
index 98cc1b69..44165ff0 100644
--- a/include/nlohmann/detail/input/lexer.hpp
+++ b/include/nlohmann/detail/input/lexer.hpp
@@ -3,10 +3,8 @@
 #include <clocale> // localeconv
 #include <cstddef> // size_t
 #include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
+#include <cstdio> // snprintf
 #include <initializer_list> // initializer_list
-#include <ios> // hex, uppercase
-#include <iomanip> // setw, setfill
-#include <sstream> // stringstream
 #include <string> // char_traits, string
 #include <vector> // vector
 
@@ -94,12 +92,14 @@ class lexer
                 return "end of input";
             case token_type::literal_or_value:
                 return "'[', '{', or a literal";
+            // LCOV_EXCL_START
             default: // catch non-enum values
-                return "unknown token"; // LCOV_EXCL_LINE
+                return "unknown token";
+                // LCOV_EXCL_STOP
         }
     }
 
-    explicit lexer(detail::input_adapter_t adapter)
+    explicit lexer(detail::input_adapter_t&& adapter)
         : ia(std::move(adapter)), decimal_point_char(get_decimal_point()) {}
 
     // delete because of pointer members
@@ -747,11 +747,13 @@ class lexer
                 goto scan_number_any1;
             }
 
+            // LCOV_EXCL_START
             default:
             {
                 // all other characters are rejected outside scan_number()
-                assert(false); // LCOV_EXCL_LINE
+                assert(false);
             }
+                // LCOV_EXCL_STOP
         }
 
 scan_number_minus:
@@ -1081,7 +1083,16 @@ scan_number_done:
     std::char_traits<char>::int_type get()
     {
         ++chars_read;
-        current = ia->get_character();
+        if (next_unget)
+        {
+            // just reset the next_unget variable and work with current
+            next_unget = false;
+        }
+        else
+        {
+            current = ia->get_character();
+        }
+
         if (JSON_LIKELY(current != std::char_traits<char>::eof()))
         {
             token_string.push_back(std::char_traits<char>::to_char_type(current));
@@ -1089,13 +1100,20 @@ scan_number_done:
         return current;
     }
 
-    /// unget current character (return it again on next get)
+    /*!
+    @brief unget current character (read it again on next get)
+
+    We implement unget by setting variable next_unget to true. The input is not
+    changed - we just simulate ungetting by modifying chars_read and
+    token_string. The next call to get() will behave as if the unget character
+    is read again.
+    */
     void unget()
     {
+        next_unget = true;
         --chars_read;
         if (JSON_LIKELY(current != std::char_traits<char>::eof()))
         {
-            ia->unget_character();
             assert(token_string.size() != 0);
             token_string.pop_back();
         }
@@ -1131,9 +1149,9 @@ scan_number_done:
     }
 
     /// return current string value (implicitly resets the token; useful only once)
-    string_t&& move_string()
+    string_t& get_string()
     {
-        return std::move(token_buffer);
+        return token_buffer;
     }
 
     /////////////////////
@@ -1158,10 +1176,9 @@ scan_number_done:
             if ('\x00' <= c and c <= '\x1F')
             {
                 // escape control characters
-                std::stringstream ss;
-                ss << "<U+" << std::setw(4) << std::uppercase << std::setfill('0')
-                   << std::hex << static_cast<int>(c) << ">";
-                result += ss.str();
+                char cs[9];
+                snprintf(cs, 9, "<U+%.4X>", static_cast<unsigned char>(c));
+                result += cs;
             }
             else
             {
@@ -1183,8 +1200,43 @@ scan_number_done:
     // actual scanner
     /////////////////////
 
+    /*!
+    @brief skip the UTF-8 byte order mark
+    @return true iff there is no BOM or the correct BOM has been skipped
+    */
+    bool skip_bom()
+    {
+        if (get() == 0xEF)
+        {
+            if (get() == 0xBB and get() == 0xBF)
+            {
+                // we completely parsed the BOM
+                return true;
+            }
+            else
+            {
+                // after reading 0xEF, an unexpected character followed
+                return false;
+            }
+        }
+        else
+        {
+            // the first character is not the beginning of the BOM; unget it to
+            // process is later
+            unget();
+            return true;
+        }
+    }
+
     token_type scan()
     {
+        // initially, skip the BOM
+        if (chars_read == 0 and not skip_bom())
+        {
+            error_message = "invalid BOM; must be 0xEF 0xBB 0xBF if given";
+            return token_type::parse_error;
+        }
+
         // read next character and ignore whitespace
         do
         {
@@ -1254,6 +1306,9 @@ scan_number_done:
     /// the current character
     std::char_traits<char>::int_type current = std::char_traits<char>::eof();
 
+    /// whether the next get() call should just return current
+    bool next_unget = false;
+
     /// the number of characters read
     std::size_t chars_read = 0;
 
diff --git a/include/nlohmann/detail/input/parser.hpp b/include/nlohmann/detail/input/parser.hpp
index e58aaaf9..70d92a26 100644
--- a/include/nlohmann/detail/input/parser.hpp
+++ b/include/nlohmann/detail/input/parser.hpp
@@ -9,7 +9,9 @@
 
 #include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
+#include <nlohmann/detail/meta/is_sax.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
+#include <nlohmann/detail/input/json_sax.hpp>
 #include <nlohmann/detail/input/lexer.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
@@ -57,11 +59,14 @@ class parser
         std::function<bool(int depth, parse_event_t event, BasicJsonType& parsed)>;
 
     /// a parser reading from an input adapter
-    explicit parser(detail::input_adapter_t adapter,
+    explicit parser(detail::input_adapter_t&& adapter,
                     const parser_callback_t cb = nullptr,
                     const bool allow_exceptions_ = true)
-        : callback(cb), m_lexer(adapter), allow_exceptions(allow_exceptions_)
-    {}
+        : callback(cb), m_lexer(std::move(adapter)), allow_exceptions(allow_exceptions_)
+    {
+        // read first token
+        get_token();
+    }
 
     /*!
     @brief public parser interface
@@ -75,31 +80,54 @@ class parser
     */
     void parse(const bool strict, BasicJsonType& result)
     {
-        // read first token
-        get_token();
-
-        parse_internal(true, result);
-        result.assert_invariant();
-
-        // in strict mode, input must be completely read
-        if (strict)
+        if (callback)
         {
-            get_token();
-            expect(token_type::end_of_input);
+            json_sax_dom_callback_parser<BasicJsonType> sdp(result, callback, allow_exceptions);
+            sax_parse_internal(&sdp);
+            result.assert_invariant();
+
+            // in strict mode, input must be completely read
+            if (strict and (get_token() != token_type::end_of_input))
+            {
+                sdp.parse_error(m_lexer.get_position(),
+                                m_lexer.get_token_string(),
+                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input)));
+            }
+
+            // in case of an error, return discarded value
+            if (sdp.is_errored())
+            {
+                result = value_t::discarded;
+                return;
+            }
+
+            // set top-level value to null if it was discarded by the callback
+            // function
+            if (result.is_discarded())
+            {
+                result = nullptr;
+            }
         }
-
-        // in case of an error, return discarded value
-        if (errored)
+        else
         {
-            result = value_t::discarded;
-            return;
-        }
+            json_sax_dom_parser<BasicJsonType> sdp(result, allow_exceptions);
+            sax_parse_internal(&sdp);
+            result.assert_invariant();
 
-        // set top-level value to null if it was discarded by the callback
-        // function
-        if (result.is_discarded())
-        {
-            result = nullptr;
+            // in strict mode, input must be completely read
+            if (strict and (get_token() != token_type::end_of_input))
+            {
+                sdp.parse_error(m_lexer.get_position(),
+                                m_lexer.get_token_string(),
+                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input)));
+            }
+
+            // in case of an error, return discarded value
+            if (sdp.is_errored())
+            {
+                result = value_t::discarded;
+                return;
+            }
         }
     }
 
@@ -111,414 +139,311 @@ class parser
     */
     bool accept(const bool strict = true)
     {
-        // read first token
-        get_token();
+        json_sax_acceptor<BasicJsonType> sax_acceptor;
+        return sax_parse(&sax_acceptor, strict);
+    }
 
-        if (not accept_internal())
+    template <typename SAX>
+    bool sax_parse(SAX* sax, const bool strict = true)
+    {
+        (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
+        const bool result = sax_parse_internal(sax);
+
+        // strict mode: next byte must be EOF
+        if (result and strict and (get_token() != token_type::end_of_input))
         {
-            return false;
+            return sax->parse_error(m_lexer.get_position(),
+                                    m_lexer.get_token_string(),
+                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input)));
         }
 
-        // strict => last token must be EOF
-        return not strict or (get_token() == token_type::end_of_input);
+        return result;
     }
 
   private:
-    /*!
-    @brief the actual parser
-    @throw parse_error.101 in case of an unexpected token
-    @throw parse_error.102 if to_unicode fails or surrogate error
-    @throw parse_error.103 if to_unicode fails
-    */
-    void parse_internal(bool keep, BasicJsonType& result)
+    template <typename SAX>
+    bool sax_parse_internal(SAX* sax)
     {
-        // never parse after a parse error was detected
-        assert(not errored);
+        // stack to remember the hieararchy of structured values we are parsing
+        // true = array; false = object
+        std::vector<bool> states;
+        // value to avoid a goto (see comment where set to true)
+        bool skip_to_state_evaluation = false;
 
-        // start with a discarded value
-        if (not result.is_discarded())
+        while (true)
         {
-            result.m_value.destroy(result.m_type);
-            result.m_type = value_t::discarded;
-        }
-
-        switch (last_token)
-        {
-            case token_type::begin_object:
+            if (not skip_to_state_evaluation)
             {
-                if (keep)
+                // invariant: get_token() was called before each iteration
+                switch (last_token)
                 {
-                    if (callback)
+                    case token_type::begin_object:
                     {
-                        keep = callback(depth++, parse_event_t::object_start, result);
-                    }
-
-                    if (not callback or keep)
-                    {
-                        // explicitly set result to object to cope with {}
-                        result.m_type = value_t::object;
-                        result.m_value = value_t::object;
-                    }
-                }
-
-                // read next token
-                get_token();
-
-                // closing } -> we are done
-                if (last_token == token_type::end_object)
-                {
-                    if (keep and callback and not callback(--depth, parse_event_t::object_end, result))
-                    {
-                        result.m_value.destroy(result.m_type);
-                        result.m_type = value_t::discarded;
-                    }
-                    break;
-                }
-
-                // parse values
-                string_t key;
-                BasicJsonType value;
-                while (true)
-                {
-                    // store key
-                    if (not expect(token_type::value_string))
-                    {
-                        return;
-                    }
-                    key = m_lexer.move_string();
-
-                    bool keep_tag = false;
-                    if (keep)
-                    {
-                        if (callback)
+                        if (JSON_UNLIKELY(not sax->start_object(std::size_t(-1))))
                         {
-                            BasicJsonType k(key);
-                            keep_tag = callback(depth, parse_event_t::key, k);
+                            return false;
+                        }
+
+                        // closing } -> we are done
+                        if (get_token() == token_type::end_object)
+                        {
+                            if (JSON_UNLIKELY(not sax->end_object()))
+                            {
+                                return false;
+                            }
+                            break;
+                        }
+
+                        // parse key
+                        if (JSON_UNLIKELY(last_token != token_type::value_string))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::value_string)));
                         }
                         else
                         {
-                            keep_tag = true;
+                            if (JSON_UNLIKELY(not sax->key(m_lexer.get_string())))
+                            {
+                                return false;
+                            }
+                        }
+
+                        // parse separator (:)
+                        if (JSON_UNLIKELY(get_token() != token_type::name_separator))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::name_separator)));
+                        }
+
+                        // remember we are now inside an object
+                        states.push_back(false);
+
+                        // parse values
+                        get_token();
+                        continue;
+                    }
+
+                    case token_type::begin_array:
+                    {
+                        if (JSON_UNLIKELY(not sax->start_array(std::size_t(-1))))
+                        {
+                            return false;
+                        }
+
+                        // closing ] -> we are done
+                        if (get_token() == token_type::end_array)
+                        {
+                            if (JSON_UNLIKELY(not sax->end_array()))
+                            {
+                                return false;
+                            }
+                            break;
+                        }
+
+                        // remember we are now inside an array
+                        states.push_back(true);
+
+                        // parse values (no need to call get_token)
+                        continue;
+                    }
+
+                    case token_type::value_float:
+                    {
+                        const auto res = m_lexer.get_number_float();
+
+                        if (JSON_UNLIKELY(not std::isfinite(res)))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    out_of_range::create(406, "number overflow parsing '" + m_lexer.get_token_string() + "'"));
+                        }
+                        else
+                        {
+                            if (JSON_UNLIKELY(not sax->number_float(res, m_lexer.get_string())))
+                            {
+                                return false;
+                            }
+                            break;
                         }
                     }
 
-                    // parse separator (:)
-                    get_token();
-                    if (not expect(token_type::name_separator))
+                    case token_type::literal_false:
                     {
-                        return;
+                        if (JSON_UNLIKELY(not sax->boolean(false)))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    // parse and add value
-                    get_token();
-                    value.m_value.destroy(value.m_type);
-                    value.m_type = value_t::discarded;
-                    parse_internal(keep, value);
-
-                    if (JSON_UNLIKELY(errored))
+                    case token_type::literal_null:
                     {
-                        return;
+                        if (JSON_UNLIKELY(not sax->null()))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    if (keep and keep_tag and not value.is_discarded())
+                    case token_type::literal_true:
                     {
-                        result.m_value.object->emplace(std::move(key), std::move(value));
+                        if (JSON_UNLIKELY(not sax->boolean(true)))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
+                    case token_type::value_integer:
                     {
-                        get_token();
-                        continue;
+                        if (JSON_UNLIKELY(not sax->number_integer(m_lexer.get_number_integer())))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    // closing }
-                    if (not expect(token_type::end_object))
+                    case token_type::value_string:
                     {
-                        return;
-                    }
-                    break;
-                }
-
-                if (keep and callback and not callback(--depth, parse_event_t::object_end, result))
-                {
-                    result.m_value.destroy(result.m_type);
-                    result.m_type = value_t::discarded;
-                }
-                break;
-            }
-
-            case token_type::begin_array:
-            {
-                if (keep)
-                {
-                    if (callback)
-                    {
-                        keep = callback(depth++, parse_event_t::array_start, result);
+                        if (JSON_UNLIKELY(not sax->string(m_lexer.get_string())))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    if (not callback or keep)
+                    case token_type::value_unsigned:
                     {
-                        // explicitly set result to array to cope with []
-                        result.m_type = value_t::array;
-                        result.m_value = value_t::array;
+                        if (JSON_UNLIKELY(not sax->number_unsigned(m_lexer.get_number_unsigned())))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::parse_error:
+                    {
+                        // using "uninitialized" to avoid "expected" message
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::uninitialized)));
+                    }
+
+                    default: // the last token was unexpected
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::literal_or_value)));
                     }
                 }
-
-                // read next token
-                get_token();
-
-                // closing ] -> we are done
-                if (last_token == token_type::end_array)
-                {
-                    if (callback and not callback(--depth, parse_event_t::array_end, result))
-                    {
-                        result.m_value.destroy(result.m_type);
-                        result.m_type = value_t::discarded;
-                    }
-                    break;
-                }
-
-                // parse values
-                BasicJsonType value;
-                while (true)
-                {
-                    // parse value
-                    value.m_value.destroy(value.m_type);
-                    value.m_type = value_t::discarded;
-                    parse_internal(keep, value);
-
-                    if (JSON_UNLIKELY(errored))
-                    {
-                        return;
-                    }
-
-                    if (keep and not value.is_discarded())
-                    {
-                        result.m_value.array->push_back(std::move(value));
-                    }
-
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
-                    {
-                        get_token();
-                        continue;
-                    }
-
-                    // closing ]
-                    if (not expect(token_type::end_array))
-                    {
-                        return;
-                    }
-                    break;
-                }
-
-                if (keep and callback and not callback(--depth, parse_event_t::array_end, result))
-                {
-                    result.m_value.destroy(result.m_type);
-                    result.m_type = value_t::discarded;
-                }
-                break;
             }
-
-            case token_type::literal_null:
+            else
             {
-                result.m_type = value_t::null;
-                break;
+                skip_to_state_evaluation = false;
             }
 
-            case token_type::value_string:
+            // we reached this line after we successfully parsed a value
+            if (states.empty())
             {
-                result.m_type = value_t::string;
-                result.m_value = m_lexer.move_string();
-                break;
-            }
-
-            case token_type::literal_true:
-            {
-                result.m_type = value_t::boolean;
-                result.m_value = true;
-                break;
-            }
-
-            case token_type::literal_false:
-            {
-                result.m_type = value_t::boolean;
-                result.m_value = false;
-                break;
-            }
-
-            case token_type::value_unsigned:
-            {
-                result.m_type = value_t::number_unsigned;
-                result.m_value = m_lexer.get_number_unsigned();
-                break;
-            }
-
-            case token_type::value_integer:
-            {
-                result.m_type = value_t::number_integer;
-                result.m_value = m_lexer.get_number_integer();
-                break;
-            }
-
-            case token_type::value_float:
-            {
-                result.m_type = value_t::number_float;
-                result.m_value = m_lexer.get_number_float();
-
-                // throw in case of infinity or NAN
-                if (JSON_UNLIKELY(not std::isfinite(result.m_value.number_float)))
-                {
-                    if (allow_exceptions)
-                    {
-                        JSON_THROW(out_of_range::create(406, "number overflow parsing '" +
-                                                        m_lexer.get_token_string() + "'"));
-                    }
-                    expect(token_type::uninitialized);
-                }
-                break;
-            }
-
-            case token_type::parse_error:
-            {
-                // using "uninitialized" to avoid "expected" message
-                if (not expect(token_type::uninitialized))
-                {
-                    return;
-                }
-                break; // LCOV_EXCL_LINE
-            }
-
-            default:
-            {
-                // the last token was unexpected; we expected a value
-                if (not expect(token_type::literal_or_value))
-                {
-                    return;
-                }
-                break; // LCOV_EXCL_LINE
-            }
-        }
-
-        if (keep and callback and not callback(depth, parse_event_t::value, result))
-        {
-            result.m_value.destroy(result.m_type);
-            result.m_type = value_t::discarded;
-        }
-    }
-
-    /*!
-    @brief the actual acceptor
-
-    @invariant 1. The last token is not yet processed. Therefore, the caller
-                  of this function must make sure a token has been read.
-               2. When this function returns, the last token is processed.
-                  That is, the last read character was already considered.
-
-    This invariant makes sure that no token needs to be "unput".
-    */
-    bool accept_internal()
-    {
-        switch (last_token)
-        {
-            case token_type::begin_object:
-            {
-                // read next token
-                get_token();
-
-                // closing } -> we are done
-                if (last_token == token_type::end_object)
-                {
-                    return true;
-                }
-
-                // parse values
-                while (true)
-                {
-                    // parse key
-                    if (last_token != token_type::value_string)
-                    {
-                        return false;
-                    }
-
-                    // parse separator (:)
-                    get_token();
-                    if (last_token != token_type::name_separator)
-                    {
-                        return false;
-                    }
-
-                    // parse value
-                    get_token();
-                    if (not accept_internal())
-                    {
-                        return false;
-                    }
-
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
-                    {
-                        get_token();
-                        continue;
-                    }
-
-                    // closing }
-                    return (last_token == token_type::end_object);
-                }
-            }
-
-            case token_type::begin_array:
-            {
-                // read next token
-                get_token();
-
-                // closing ] -> we are done
-                if (last_token == token_type::end_array)
-                {
-                    return true;
-                }
-
-                // parse values
-                while (true)
-                {
-                    // parse value
-                    if (not accept_internal())
-                    {
-                        return false;
-                    }
-
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
-                    {
-                        get_token();
-                        continue;
-                    }
-
-                    // closing ]
-                    return (last_token == token_type::end_array);
-                }
-            }
-
-            case token_type::value_float:
-            {
-                // reject infinity or NAN
-                return std::isfinite(m_lexer.get_number_float());
-            }
-
-            case token_type::literal_false:
-            case token_type::literal_null:
-            case token_type::literal_true:
-            case token_type::value_integer:
-            case token_type::value_string:
-            case token_type::value_unsigned:
+                // empty stack: we reached the end of the hieararchy: done
                 return true;
+            }
+            else
+            {
+                if (states.back())  // array
+                {
+                    // comma -> next value
+                    if (get_token() == token_type::value_separator)
+                    {
+                        // parse a new value
+                        get_token();
+                        continue;
+                    }
 
-            default: // the last token was unexpected
-                return false;
+                    // closing ]
+                    if (JSON_LIKELY(last_token == token_type::end_array))
+                    {
+                        if (JSON_UNLIKELY(not sax->end_array()))
+                        {
+                            return false;
+                        }
+
+                        // We are done with this array. Before we can parse a
+                        // new value, we need to evaluate the new state first.
+                        // By setting skip_to_state_evaluation to false, we
+                        // are effectively jumping to the beginning of this if.
+                        assert(not states.empty());
+                        states.pop_back();
+                        skip_to_state_evaluation = true;
+                        continue;
+                    }
+                    else
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_array)));
+                    }
+                }
+                else  // object
+                {
+                    // comma -> next value
+                    if (get_token() == token_type::value_separator)
+                    {
+                        // parse key
+                        if (JSON_UNLIKELY(get_token() != token_type::value_string))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::value_string)));
+                        }
+                        else
+                        {
+                            if (JSON_UNLIKELY(not sax->key(m_lexer.get_string())))
+                            {
+                                return false;
+                            }
+                        }
+
+                        // parse separator (:)
+                        if (JSON_UNLIKELY(get_token() != token_type::name_separator))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::name_separator)));
+                        }
+
+                        // parse values
+                        get_token();
+                        continue;
+                    }
+
+                    // closing }
+                    if (JSON_LIKELY(last_token == token_type::end_object))
+                    {
+                        if (JSON_UNLIKELY(not sax->end_object()))
+                        {
+                            return false;
+                        }
+
+                        // We are done with this object. Before we can parse a
+                        // new value, we need to evaluate the new state first.
+                        // By setting skip_to_state_evaluation to false, we
+                        // are effectively jumping to the beginning of this if.
+                        assert(not states.empty());
+                        states.pop_back();
+                        skip_to_state_evaluation = true;
+                        continue;
+                    }
+                    else
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_object)));
+                    }
+                }
+            }
         }
     }
 
@@ -528,29 +453,7 @@ class parser
         return (last_token = m_lexer.scan());
     }
 
-    /*!
-    @throw parse_error.101 if expected token did not occur
-    */
-    bool expect(token_type t)
-    {
-        if (JSON_UNLIKELY(t != last_token))
-        {
-            errored = true;
-            expected = t;
-            if (allow_exceptions)
-            {
-                throw_exception();
-            }
-            else
-            {
-                return false;
-            }
-        }
-
-        return true;
-    }
-
-    [[noreturn]] void throw_exception() const
+    std::string exception_message(const token_type expected)
     {
         std::string error_msg = "syntax error - ";
         if (last_token == token_type::parse_error)
@@ -568,22 +471,16 @@ class parser
             error_msg += "; expected " + std::string(lexer_t::token_type_name(expected));
         }
 
-        JSON_THROW(parse_error::create(101, m_lexer.get_position(), error_msg));
+        return error_msg;
     }
 
   private:
-    /// current level of recursion
-    int depth = 0;
     /// callback function
     const parser_callback_t callback = nullptr;
     /// the type of the last read token
     token_type last_token = token_type::uninitialized;
     /// the lexer
     lexer_t m_lexer;
-    /// whether a syntax error occurred
-    bool errored = false;
-    /// possible reason for the syntax error
-    token_type expected = token_type::uninitialized;
     /// whether to throw exceptions in case of errors
     const bool allow_exceptions = true;
 };
diff --git a/include/nlohmann/detail/iterators/iter_impl.hpp b/include/nlohmann/detail/iterators/iter_impl.hpp
index 52ede17b..adcd8a37 100644
--- a/include/nlohmann/detail/iterators/iter_impl.hpp
+++ b/include/nlohmann/detail/iterators/iter_impl.hpp
@@ -8,7 +8,7 @@
 #include <nlohmann/detail/iterators/internal_iterator.hpp>
 #include <nlohmann/detail/iterators/primitive_iterator.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
-#include <nlohmann/detail/meta.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
 namespace nlohmann
@@ -31,7 +31,7 @@ This class implements a both iterators (iterator and const_iterator) for the
 
 @requirement The class satisfies the following concept requirements:
 -
-[BidirectionalIterator](http://en.cppreference.com/w/cpp/concept/BidirectionalIterator):
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
   The iterator that can be moved can be moved in both directions (i.e.
   incremented and decremented).
 
@@ -583,7 +583,7 @@ class iter_impl
     @brief  return the key of an object iterator
     @pre The iterator is initialized; i.e. `m_object != nullptr`.
     */
-    typename object_t::key_type key() const
+    const typename object_t::key_type& key() const
     {
         assert(m_object != nullptr);
 
diff --git a/include/nlohmann/detail/iterators/iteration_proxy.hpp b/include/nlohmann/detail/iterators/iteration_proxy.hpp
index 7547d038..f5dbb2c7 100644
--- a/include/nlohmann/detail/iterators/iteration_proxy.hpp
+++ b/include/nlohmann/detail/iterators/iteration_proxy.hpp
@@ -2,6 +2,7 @@
 
 #include <cstddef> // size_t
 #include <string> // string, to_string
+#include <iterator> // input_iterator_tag
 
 #include <nlohmann/detail/value_t.hpp>
 
@@ -16,15 +17,31 @@ template<typename IteratorType> class iteration_proxy
     /// helper class for iteration
     class iteration_proxy_internal
     {
+      public:
+        using difference_type = std::ptrdiff_t;
+        using value_type = iteration_proxy_internal;
+        using pointer = iteration_proxy_internal*;
+        using reference = iteration_proxy_internal&;
+        using iterator_category = std::input_iterator_tag;
+
       private:
         /// the iterator
         IteratorType anchor;
         /// an index for arrays (used to create key names)
         std::size_t array_index = 0;
+        /// last stringified array index
+        mutable std::size_t array_index_last = 0;
+        /// a string representation of the array index
+        mutable std::string array_index_str = "0";
+        /// an empty string (to return a reference for primitive values)
+        const std::string empty_str = "";
 
       public:
         explicit iteration_proxy_internal(IteratorType it) noexcept : anchor(it) {}
 
+        iteration_proxy_internal(const iteration_proxy_internal&) = default;
+        iteration_proxy_internal& operator=(const iteration_proxy_internal&) = default;
+
         /// dereference operator (needed for range-based for)
         iteration_proxy_internal& operator*()
         {
@@ -40,6 +57,12 @@ template<typename IteratorType> class iteration_proxy
             return *this;
         }
 
+        /// equality operator (needed for InputIterator)
+        bool operator==(const iteration_proxy_internal& o) const noexcept
+        {
+            return anchor == o.anchor;
+        }
+
         /// inequality operator (needed for range-based for)
         bool operator!=(const iteration_proxy_internal& o) const noexcept
         {
@@ -47,7 +70,7 @@ template<typename IteratorType> class iteration_proxy
         }
 
         /// return key of the iterator
-        std::string key() const
+        const std::string& key() const
         {
             assert(anchor.m_object != nullptr);
 
@@ -55,7 +78,14 @@ template<typename IteratorType> class iteration_proxy
             {
                 // use integer array index as key
                 case value_t::array:
-                    return std::to_string(array_index);
+                {
+                    if (array_index != array_index_last)
+                    {
+                        array_index_str = std::to_string(array_index);
+                        array_index_last = array_index;
+                    }
+                    return array_index_str;
+                }
 
                 // use key from the object
                 case value_t::object:
@@ -63,7 +93,7 @@ template<typename IteratorType> class iteration_proxy
 
                 // use an empty key for all primitive types
                 default:
-                    return "";
+                    return empty_str;
             }
         }
 
diff --git a/include/nlohmann/detail/iterators/json_reverse_iterator.hpp b/include/nlohmann/detail/iterators/json_reverse_iterator.hpp
index 06448191..2750de4a 100644
--- a/include/nlohmann/detail/iterators/json_reverse_iterator.hpp
+++ b/include/nlohmann/detail/iterators/json_reverse_iterator.hpp
@@ -21,10 +21,10 @@ create @ref const_reverse_iterator).
 
 @requirement The class satisfies the following concept requirements:
 -
-[BidirectionalIterator](http://en.cppreference.com/w/cpp/concept/BidirectionalIterator):
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
   The iterator that can be moved can be moved in both directions (i.e.
   incremented and decremented).
-- [OutputIterator](http://en.cppreference.com/w/cpp/concept/OutputIterator):
+- [OutputIterator](https://en.cppreference.com/w/cpp/named_req/OutputIterator):
   It is possible to write to the pointed-to element (only if @a Base is
   @ref iterator).
 
@@ -41,11 +41,11 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
     using reference = typename Base::reference;
 
     /// create reverse iterator from iterator
-    json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
+    explicit json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
         : base_iterator(it) {}
 
     /// create reverse iterator from base class
-    json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
+    explicit json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
 
     /// post-increment (it++)
     json_reverse_iterator const operator++(int)
diff --git a/include/nlohmann/detail/iterators/primitive_iterator.hpp b/include/nlohmann/detail/iterators/primitive_iterator.hpp
index db0b1e7c..db3f8975 100644
--- a/include/nlohmann/detail/iterators/primitive_iterator.hpp
+++ b/include/nlohmann/detail/iterators/primitive_iterator.hpp
@@ -87,7 +87,7 @@ class primitive_iterator_t
     primitive_iterator_t const operator++(int) noexcept
     {
         auto result = *this;
-        m_it++;
+        ++m_it;
         return result;
     }
 
@@ -100,7 +100,7 @@ class primitive_iterator_t
     primitive_iterator_t const operator--(int) noexcept
     {
         auto result = *this;
-        m_it--;
+        --m_it;
         return result;
     }
 
diff --git a/include/nlohmann/detail/macro_scope.hpp b/include/nlohmann/detail/macro_scope.hpp
index e6752218..a5b6101e 100644
--- a/include/nlohmann/detail/macro_scope.hpp
+++ b/include/nlohmann/detail/macro_scope.hpp
@@ -4,13 +4,15 @@
 // You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them
 
 // exclude unsupported compilers
-#if defined(__clang__)
-    #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
-        #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
-    #endif
-#elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
-    #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
-        #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
+#if !defined(JSON_SKIP_UNSUPPORTED_COMPILER_CHECK)
+    #if defined(__clang__)
+        #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
+            #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
+        #endif
+    #elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
+        #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
+            #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
+        #endif
     #endif
 #endif
 
@@ -40,10 +42,12 @@
     #define JSON_THROW(exception) throw exception
     #define JSON_TRY try
     #define JSON_CATCH(exception) catch(exception)
+    #define JSON_INTERNAL_CATCH(exception) catch(exception)
 #else
     #define JSON_THROW(exception) std::abort()
     #define JSON_TRY if(true)
     #define JSON_CATCH(exception) if(false)
+    #define JSON_INTERNAL_CATCH(exception) if(false)
 #endif
 
 // override exception macros
@@ -58,6 +62,11 @@
 #if defined(JSON_CATCH_USER)
     #undef JSON_CATCH
     #define JSON_CATCH JSON_CATCH_USER
+    #define JSON_INTERNAL_CATCH JSON_CATCH_USER
+#endif
+#if defined(JSON_INTERNAL_CATCH_USER)
+    #undef JSON_INTERNAL_CATCH
+    #define JSON_INTERNAL_CATCH JSON_INTERNAL_CATCH_USER
 #endif
 
 // manual branch prediction
diff --git a/include/nlohmann/detail/macro_unscope.hpp b/include/nlohmann/detail/macro_unscope.hpp
index 99a0abdf..032b1218 100644
--- a/include/nlohmann/detail/macro_unscope.hpp
+++ b/include/nlohmann/detail/macro_unscope.hpp
@@ -9,6 +9,7 @@
 #endif
 
 // clean up
+#undef JSON_INTERNAL_CATCH
 #undef JSON_CATCH
 #undef JSON_THROW
 #undef JSON_TRY
diff --git a/include/nlohmann/detail/meta/cpp_future.hpp b/include/nlohmann/detail/meta/cpp_future.hpp
new file mode 100644
index 00000000..d12d6bdb
--- /dev/null
+++ b/include/nlohmann/detail/meta/cpp_future.hpp
@@ -0,0 +1,83 @@
+#pragma once
+
+#include <ciso646> // not
+#include <cstddef> // size_t
+#include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
+
+namespace nlohmann
+{
+namespace detail
+{
+// alias templates to reduce boilerplate
+template<bool B, typename T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
+
+template<typename T>
+using uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
+
+// implementation of C++14 index_sequence and affiliates
+// source: https://stackoverflow.com/a/32223343
+template<std::size_t... Ints>
+struct index_sequence
+{
+    using type = index_sequence;
+    using value_type = std::size_t;
+    static constexpr std::size_t size() noexcept
+    {
+        return sizeof...(Ints);
+    }
+};
+
+template<class Sequence1, class Sequence2>
+struct merge_and_renumber;
+
+template<std::size_t... I1, std::size_t... I2>
+struct merge_and_renumber<index_sequence<I1...>, index_sequence<I2...>>
+        : index_sequence < I1..., (sizeof...(I1) + I2)... > {};
+
+template<std::size_t N>
+struct make_index_sequence
+    : merge_and_renumber < typename make_index_sequence < N / 2 >::type,
+      typename make_index_sequence < N - N / 2 >::type > {};
+
+template<> struct make_index_sequence<0> : index_sequence<> {};
+template<> struct make_index_sequence<1> : index_sequence<0> {};
+
+template<typename... Ts>
+using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
+
+/*
+Implementation of two C++17 constructs: conjunction, negation. This is needed
+to avoid evaluating all the traits in a condition
+
+For example: not std::is_same<void, T>::value and has_value_type<T>::value
+will not compile when T = void (on MSVC at least). Whereas
+conjunction<negation<std::is_same<void, T>>, has_value_type<T>>::value will
+stop evaluating if negation<...>::value == false
+
+Please note that those constructs must be used with caution, since symbols can
+become very long quickly (which can slow down compilation and cause MSVC
+internal compiler errors). Only use it when you have to (see example ahead).
+*/
+template<class...> struct conjunction : std::true_type {};
+template<class B1> struct conjunction<B1> : B1 {};
+template<class B1, class... Bn>
+struct conjunction<B1, Bn...> : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
+
+template<class B> struct negation : std::integral_constant<bool, not B::value> {};
+
+// dispatch utility (taken from ranges-v3)
+template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
+template<> struct priority_tag<0> {};
+
+// taken from ranges-v3
+template<typename T>
+struct static_const
+{
+    static constexpr T value{};
+};
+
+template<typename T>
+constexpr T static_const<T>::value;
+}
+}
diff --git a/include/nlohmann/detail/meta/detected.hpp b/include/nlohmann/detail/meta/detected.hpp
new file mode 100644
index 00000000..ed1d6ac7
--- /dev/null
+++ b/include/nlohmann/detail/meta/detected.hpp
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <type_traits>
+
+#include <nlohmann/detail/meta/void_t.hpp>
+
+// http://en.cppreference.com/w/cpp/experimental/is_detected
+namespace nlohmann
+{
+namespace detail
+{
+struct nonesuch
+{
+    nonesuch() = delete;
+    ~nonesuch() = delete;
+    nonesuch(nonesuch const&) = delete;
+    void operator=(nonesuch const&) = delete;
+};
+
+template <class Default,
+          class AlwaysVoid,
+          template <class...> class Op,
+          class... Args>
+struct detector
+{
+    using value_t = std::false_type;
+    using type = Default;
+};
+
+template <class Default, template <class...> class Op, class... Args>
+struct detector<Default, void_t<Op<Args...>>, Op, Args...>
+{
+    using value_t = std::true_type;
+    using type = Op<Args...>;
+};
+
+template <template <class...> class Op, class... Args>
+using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
+
+template <template <class...> class Op, class... Args>
+using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
+
+template <class Default, template <class...> class Op, class... Args>
+using detected_or = detector<Default, void, Op, Args...>;
+
+template <class Default, template <class...> class Op, class... Args>
+using detected_or_t = typename detected_or<Default, Op, Args...>::type;
+
+template <class Expected, template <class...> class Op, class... Args>
+using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
+
+template <class To, template <class...> class Op, class... Args>
+using is_detected_convertible =
+    std::is_convertible<detected_t<Op, Args...>, To>;
+}
+}
diff --git a/include/nlohmann/detail/meta/is_sax.hpp b/include/nlohmann/detail/meta/is_sax.hpp
new file mode 100644
index 00000000..b4e1f3fd
--- /dev/null
+++ b/include/nlohmann/detail/meta/is_sax.hpp
@@ -0,0 +1,141 @@
+#pragma once
+
+#include <cstdint> // size_t
+#include <utility> // declval
+
+#include <nlohmann/detail/meta/detected.hpp>
+#include <nlohmann/detail/meta/type_traits.hpp>
+
+namespace nlohmann
+{
+namespace detail
+{
+template <typename T>
+using null_function_t = decltype(std::declval<T&>().null());
+
+template <typename T>
+using boolean_function_t =
+    decltype(std::declval<T&>().boolean(std::declval<bool>()));
+
+template <typename T, typename Integer>
+using number_integer_function_t =
+    decltype(std::declval<T&>().number_integer(std::declval<Integer>()));
+
+template <typename T, typename Unsigned>
+using number_unsigned_function_t =
+    decltype(std::declval<T &>().number_unsigned(std::declval<Unsigned>()));
+
+template <typename T, typename Float, typename String>
+using number_float_function_t = decltype(std::declval<T &>().number_float(
+    std::declval<Float>(), std::declval<const String &>()));
+
+template <typename T, typename String>
+using string_function_t =
+    decltype(std::declval<T &>().string(std::declval<String &>()));
+
+template <typename T>
+using start_object_function_t =
+    decltype(std::declval<T &>().start_object(std::declval<std::size_t>()));
+
+template <typename T, typename String>
+using key_function_t =
+    decltype(std::declval<T &>().key(std::declval<String &>()));
+
+template <typename T>
+using end_object_function_t = decltype(std::declval<T &>().end_object());
+
+template <typename T>
+using start_array_function_t =
+    decltype(std::declval<T &>().start_array(std::declval<std::size_t>()));
+
+template <typename T>
+using end_array_function_t = decltype(std::declval<T &>().end_array());
+
+template <typename T, typename Exception>
+using parse_error_function_t = decltype(std::declval<T &>().parse_error(
+    std::declval<std::size_t>(), std::declval<const std::string &>(),
+    std::declval<const Exception &>()));
+
+template <typename SAX, typename BasicJsonType>
+struct is_sax
+{
+private:
+  static_assert(is_basic_json<BasicJsonType>::value,
+                "BasicJsonType must be of type basic_json<...>");
+
+  using number_integer_t = typename BasicJsonType::number_integer_t;
+  using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+  using number_float_t = typename BasicJsonType::number_float_t;
+  using string_t = typename BasicJsonType::string_t;
+  using exception_t = typename BasicJsonType::exception;
+
+public:
+  static constexpr bool value =
+      is_detected_exact<bool, null_function_t, SAX>::value &&
+      is_detected_exact<bool, boolean_function_t, SAX>::value &&
+      is_detected_exact<bool, number_integer_function_t, SAX,
+                        number_integer_t>::value &&
+      is_detected_exact<bool, number_unsigned_function_t, SAX,
+                        number_unsigned_t>::value &&
+      is_detected_exact<bool, number_float_function_t, SAX, number_float_t,
+                        string_t>::value &&
+      is_detected_exact<bool, string_function_t, SAX, string_t>::value &&
+      is_detected_exact<bool, start_object_function_t, SAX>::value &&
+      is_detected_exact<bool, key_function_t, SAX, string_t>::value &&
+      is_detected_exact<bool, end_object_function_t, SAX>::value &&
+      is_detected_exact<bool, start_array_function_t, SAX>::value &&
+      is_detected_exact<bool, end_array_function_t, SAX>::value &&
+      is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value;
+};
+
+template <typename SAX, typename BasicJsonType>
+struct is_sax_static_asserts
+{
+private:
+  static_assert(is_basic_json<BasicJsonType>::value,
+                "BasicJsonType must be of type basic_json<...>");
+
+  using number_integer_t = typename BasicJsonType::number_integer_t;
+  using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+  using number_float_t = typename BasicJsonType::number_float_t;
+  using string_t = typename BasicJsonType::string_t;
+  using exception_t = typename BasicJsonType::exception;
+
+public:
+  static_assert(is_detected_exact<bool, null_function_t, SAX>::value,
+                "Missing/invalid function: bool null()");
+  static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+                "Missing/invalid function: bool boolean(bool)");
+  static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+                "Missing/invalid function: bool boolean(bool)");
+  static_assert(
+      is_detected_exact<bool, number_integer_function_t, SAX,
+                        number_integer_t>::value,
+      "Missing/invalid function: bool number_integer(number_integer_t)");
+  static_assert(
+      is_detected_exact<bool, number_unsigned_function_t, SAX,
+                        number_unsigned_t>::value,
+      "Missing/invalid function: bool number_unsigned(number_unsigned_t)");
+  static_assert(is_detected_exact<bool, number_float_function_t, SAX,
+                                  number_float_t, string_t>::value,
+                "Missing/invalid function: bool number_float(number_float_t, const string_t&)");
+  static_assert(
+      is_detected_exact<bool, string_function_t, SAX, string_t>::value,
+      "Missing/invalid function: bool string(string_t&)");
+  static_assert(is_detected_exact<bool, start_object_function_t, SAX>::value,
+                "Missing/invalid function: bool start_object(std::size_t)");
+  static_assert(is_detected_exact<bool, key_function_t, SAX, string_t>::value,
+                "Missing/invalid function: bool key(string_t&)");
+  static_assert(is_detected_exact<bool, end_object_function_t, SAX>::value,
+                "Missing/invalid function: bool end_object()");
+  static_assert(is_detected_exact<bool, start_array_function_t, SAX>::value,
+                "Missing/invalid function: bool start_array(std::size_t)");
+  static_assert(is_detected_exact<bool, end_array_function_t, SAX>::value,
+                "Missing/invalid function: bool end_array()");
+  static_assert(
+      is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value,
+      "Missing/invalid function: bool parse_error(std::size_t, const "
+      "std::string&, const exception&)");
+};
+}
+}
diff --git a/include/nlohmann/detail/meta.hpp b/include/nlohmann/detail/meta/type_traits.hpp
similarity index 71%
rename from include/nlohmann/detail/meta.hpp
rename to include/nlohmann/detail/meta/type_traits.hpp
index b251afb6..caf81222 100644
--- a/include/nlohmann/detail/meta.hpp
+++ b/include/nlohmann/detail/meta/type_traits.hpp
@@ -1,12 +1,12 @@
 #pragma once
 
 #include <ciso646> // not
-#include <cstddef> // size_t
 #include <limits> // numeric_limits
-#include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
+#include <type_traits> // false_type, is_constructible, is_integral, is_same, true_type
 #include <utility> // declval
 
 #include <nlohmann/json_fwd.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
 
 namespace nlohmann
@@ -30,68 +30,6 @@ template<typename> struct is_basic_json : std::false_type {};
 NLOHMANN_BASIC_JSON_TPL_DECLARATION
 struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
 
-// alias templates to reduce boilerplate
-template<bool B, typename T = void>
-using enable_if_t = typename std::enable_if<B, T>::type;
-
-template<typename T>
-using uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
-
-// implementation of C++14 index_sequence and affiliates
-// source: https://stackoverflow.com/a/32223343
-template<std::size_t... Ints>
-struct index_sequence
-{
-    using type = index_sequence;
-    using value_type = std::size_t;
-    static constexpr std::size_t size() noexcept
-    {
-        return sizeof...(Ints);
-    }
-};
-
-template<class Sequence1, class Sequence2>
-struct merge_and_renumber;
-
-template<std::size_t... I1, std::size_t... I2>
-struct merge_and_renumber<index_sequence<I1...>, index_sequence<I2...>>
-        : index_sequence < I1..., (sizeof...(I1) + I2)... > {};
-
-template<std::size_t N>
-struct make_index_sequence
-    : merge_and_renumber < typename make_index_sequence < N / 2 >::type,
-      typename make_index_sequence < N - N / 2 >::type > {};
-
-template<> struct make_index_sequence<0> : index_sequence<> {};
-template<> struct make_index_sequence<1> : index_sequence<0> {};
-
-template<typename... Ts>
-using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
-
-/*
-Implementation of two C++17 constructs: conjunction, negation. This is needed
-to avoid evaluating all the traits in a condition
-
-For example: not std::is_same<void, T>::value and has_value_type<T>::value
-will not compile when T = void (on MSVC at least). Whereas
-conjunction<negation<std::is_same<void, T>>, has_value_type<T>>::value will
-stop evaluating if negation<...>::value == false
-
-Please note that those constructs must be used with caution, since symbols can
-become very long quickly (which can slow down compilation and cause MSVC
-internal compiler errors). Only use it when you have to (see example ahead).
-*/
-template<class...> struct conjunction : std::true_type {};
-template<class B1> struct conjunction<B1> : B1 {};
-template<class B1, class... Bn>
-struct conjunction<B1, Bn...> : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
-
-template<class B> struct negation : std::integral_constant<bool, not B::value> {};
-
-// dispatch utility (taken from ranges-v3)
-template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
-template<> struct priority_tag<0> {};
-
 ////////////////////////
 // has_/is_ functions //
 ////////////////////////
@@ -120,6 +58,17 @@ struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
         std::is_constructible<typename RealType::mapped_type, typename CompatibleObjectType::mapped_type>::value;
 };
 
+template<bool B, class RealType, class CompatibleStringType>
+struct is_compatible_string_type_impl : std::false_type {};
+
+template<class RealType, class CompatibleStringType>
+struct is_compatible_string_type_impl<true, RealType, CompatibleStringType>
+{
+    static constexpr auto value =
+        std::is_same<typename RealType::value_type, typename CompatibleStringType::value_type>::value and
+        std::is_constructible<RealType, CompatibleStringType>::value;
+};
+
 template<class BasicJsonType, class CompatibleObjectType>
 struct is_compatible_object_type
 {
@@ -130,6 +79,15 @@ struct is_compatible_object_type
                                   typename BasicJsonType::object_t, CompatibleObjectType >::value;
 };
 
+template<class BasicJsonType, class CompatibleStringType>
+struct is_compatible_string_type
+{
+    static auto constexpr value = is_compatible_string_type_impl <
+                                  conjunction<negation<std::is_same<void, CompatibleStringType>>,
+                                  has_value_type<CompatibleStringType>>::value,
+                                  typename BasicJsonType::string_t, CompatibleStringType >::value;
+};
+
 template<typename BasicJsonType, typename T>
 struct is_basic_json_nested_type
 {
@@ -244,15 +202,5 @@ struct is_compatible_type
       is_compatible_complete_type<BasicJsonType, CompatibleType>>
 {
 };
-
-// taken from ranges-v3
-template<typename T>
-struct static_const
-{
-    static constexpr T value{};
-};
-
-template<typename T>
-constexpr T static_const<T>::value;
 }
 }
diff --git a/include/nlohmann/detail/meta/void_t.hpp b/include/nlohmann/detail/meta/void_t.hpp
new file mode 100644
index 00000000..66c4a359
--- /dev/null
+++ b/include/nlohmann/detail/meta/void_t.hpp
@@ -0,0 +1,10 @@
+#pragma once
+
+namespace nlohmann
+{
+namespace detail
+{
+template <typename...>
+using void_t = void;
+}
+}
diff --git a/include/nlohmann/detail/output/binary_writer.hpp b/include/nlohmann/detail/output/binary_writer.hpp
index 1b15bdaf..71e5ec81 100644
--- a/include/nlohmann/detail/output/binary_writer.hpp
+++ b/include/nlohmann/detail/output/binary_writer.hpp
@@ -149,9 +149,9 @@ class binary_writer
                 break;
             }
 
-            case value_t::number_float: // Double-Precision Float
+            case value_t::number_float:
             {
-                oa->write_character(static_cast<CharType>(0xFB));
+                oa->write_character(get_cbor_float_prefix(j.m_value.number_float));
                 write_number(j.m_value.number_float);
                 break;
             }
@@ -409,9 +409,9 @@ class binary_writer
                 break;
             }
 
-            case value_t::number_float: // float 64
+            case value_t::number_float:
             {
-                oa->write_character(static_cast<CharType>(0xCB));
+                oa->write_character(get_msgpack_float_prefix(j.m_value.number_float));
                 write_number(j.m_value.number_float);
                 break;
             }
@@ -588,7 +588,7 @@ class binary_writer
                 if (use_type and not j.m_value.array->empty())
                 {
                     assert(use_count);
-                    const char first_prefix = ubjson_prefix(j.front());
+                    const CharType first_prefix = ubjson_prefix(j.front());
                     const bool same_prefix = std::all_of(j.begin() + 1, j.end(),
                                                          [this, first_prefix](const BasicJsonType & v)
                     {
@@ -599,7 +599,7 @@ class binary_writer
                     {
                         prefix_required = false;
                         oa->write_character(static_cast<CharType>('$'));
-                        oa->write_character(static_cast<CharType>(first_prefix));
+                        oa->write_character(first_prefix);
                     }
                 }
 
@@ -633,7 +633,7 @@ class binary_writer
                 if (use_type and not j.m_value.object->empty())
                 {
                     assert(use_count);
-                    const char first_prefix = ubjson_prefix(j.front());
+                    const CharType first_prefix = ubjson_prefix(j.front());
                     const bool same_prefix = std::all_of(j.begin(), j.end(),
                                                          [this, first_prefix](const BasicJsonType & v)
                     {
@@ -644,7 +644,7 @@ class binary_writer
                     {
                         prefix_required = false;
                         oa->write_character(static_cast<CharType>('$'));
-                        oa->write_character(static_cast<CharType>(first_prefix));
+                        oa->write_character(first_prefix);
                     }
                 }
 
@@ -712,7 +712,7 @@ class binary_writer
     {
         if (add_prefix)
         {
-            oa->write_character(static_cast<CharType>('D'));  // float64
+            oa->write_character(get_ubjson_float_prefix(n));
         }
         write_number(n);
     }
@@ -833,7 +833,7 @@ class binary_writer
           write_number_with_ubjson_prefix. Therefore, we return 'L' for any
           value that does not fit the previous limits.
     */
-    char ubjson_prefix(const BasicJsonType& j) const noexcept
+    CharType ubjson_prefix(const BasicJsonType& j) const noexcept
     {
         switch (j.type())
         {
@@ -892,7 +892,7 @@ class binary_writer
             }
 
             case value_t::number_float:
-                return 'D';
+                return get_ubjson_float_prefix(j.m_value.number_float);
 
             case value_t::string:
                 return 'S';
@@ -908,6 +908,36 @@ class binary_writer
         }
     }
 
+    static constexpr CharType get_cbor_float_prefix(float)
+    {
+        return static_cast<CharType>(0xFA);  // Single-Precision Float
+    }
+
+    static constexpr CharType get_cbor_float_prefix(double)
+    {
+        return static_cast<CharType>(0xFB);  // Double-Precision Float
+    }
+
+    static constexpr CharType get_msgpack_float_prefix(float)
+    {
+        return static_cast<CharType>(0xCA);  // float 32
+    }
+
+    static constexpr CharType get_msgpack_float_prefix(double)
+    {
+        return static_cast<CharType>(0xCB);  // float 64
+    }
+
+    static constexpr CharType get_ubjson_float_prefix(float)
+    {
+        return 'd';  // float 32
+    }
+
+    static constexpr CharType get_ubjson_float_prefix(double)
+    {
+        return 'D';  // float 64
+    }
+
   private:
     /// whether we can assume little endianess
     const bool is_little_endian = binary_reader<BasicJsonType>::little_endianess();
diff --git a/include/nlohmann/detail/output/serializer.hpp b/include/nlohmann/detail/output/serializer.hpp
index a6442644..de3676ac 100644
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@@ -9,17 +9,14 @@
 #include <cstddef> // size_t, ptrdiff_t
 #include <cstdint> // uint8_t
 #include <cstdio> // snprintf
-#include <iomanip> // setfill
-#include <iterator> // next
 #include <limits> // numeric_limits
 #include <string> // string
-#include <sstream> // stringstream
 #include <type_traits> // is_same
 
 #include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/conversions/to_chars.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
-#include <nlohmann/detail/meta.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/output/output_adapters.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
@@ -389,9 +386,9 @@ class serializer
 
                 case UTF8_REJECT:  // decode found invalid UTF-8 byte
                 {
-                    std::stringstream ss;
-                    ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << static_cast<int>(byte);
-                    JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + ss.str()));
+                    std::string sn(3, '\0');
+                    snprintf(&sn[0], sn.size(), "%.2X", byte);
+                    JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + sn));
                 }
 
                 default:  // decode found yet incomplete multi-byte code point
@@ -417,9 +414,9 @@ class serializer
         else
         {
             // we finish reading, but do not accept: string was incomplete
-            std::stringstream ss;
-            ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << static_cast<int>(static_cast<uint8_t>(s.back()));
-            JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + ss.str()));
+            std::string sn(3, '\0');
+            snprintf(&sn[0], sn.size(), "%.2X", static_cast<uint8_t>(s.back()));
+            JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + sn));
         }
     }
 
diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 7ecf631f..1f39e3ec 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -30,8 +31,8 @@ SOFTWARE.
 #define NLOHMANN_JSON_HPP
 
 #define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 1
-#define NLOHMANN_JSON_VERSION_PATCH 2
+#define NLOHMANN_JSON_VERSION_MINOR 2
+#define NLOHMANN_JSON_VERSION_PATCH 0
 
 #include <algorithm> // all_of, find, for_each
 #include <cassert> // assert
@@ -47,7 +48,8 @@ SOFTWARE.
 
 #include <nlohmann/json_fwd.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
-#include <nlohmann/detail/meta.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
+#include <nlohmann/detail/meta/type_traits.hpp>
 #include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/value_t.hpp>
 #include <nlohmann/detail/conversions/from_json.hpp>
@@ -100,42 +102,42 @@ and `from_json()` (@ref adl_serializer by default)
 
 @requirement The class satisfies the following concept requirements:
 - Basic
- - [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible):
+ - [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible):
    JSON values can be default constructed. The result will be a JSON null
    value.
- - [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible):
+ - [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible):
    A JSON value can be constructed from an rvalue argument.
- - [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible):
+ - [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible):
    A JSON value can be copy-constructed from an lvalue expression.
- - [MoveAssignable](http://en.cppreference.com/w/cpp/concept/MoveAssignable):
+ - [MoveAssignable](https://en.cppreference.com/w/cpp/named_req/MoveAssignable):
    A JSON value van be assigned from an rvalue argument.
- - [CopyAssignable](http://en.cppreference.com/w/cpp/concept/CopyAssignable):
+ - [CopyAssignable](https://en.cppreference.com/w/cpp/named_req/CopyAssignable):
    A JSON value can be copy-assigned from an lvalue expression.
- - [Destructible](http://en.cppreference.com/w/cpp/concept/Destructible):
+ - [Destructible](https://en.cppreference.com/w/cpp/named_req/Destructible):
    JSON values can be destructed.
 - Layout
- - [StandardLayoutType](http://en.cppreference.com/w/cpp/concept/StandardLayoutType):
+ - [StandardLayoutType](https://en.cppreference.com/w/cpp/named_req/StandardLayoutType):
    JSON values have
-   [standard layout](http://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
+   [standard layout](https://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
    All non-static data members are private and standard layout types, the
    class has no virtual functions or (virtual) base classes.
 - Library-wide
- - [EqualityComparable](http://en.cppreference.com/w/cpp/concept/EqualityComparable):
+ - [EqualityComparable](https://en.cppreference.com/w/cpp/named_req/EqualityComparable):
    JSON values can be compared with `==`, see @ref
    operator==(const_reference,const_reference).
- - [LessThanComparable](http://en.cppreference.com/w/cpp/concept/LessThanComparable):
+ - [LessThanComparable](https://en.cppreference.com/w/cpp/named_req/LessThanComparable):
    JSON values can be compared with `<`, see @ref
    operator<(const_reference,const_reference).
- - [Swappable](http://en.cppreference.com/w/cpp/concept/Swappable):
+ - [Swappable](https://en.cppreference.com/w/cpp/named_req/Swappable):
    Any JSON lvalue or rvalue of can be swapped with any lvalue or rvalue of
    other compatible types, using unqualified function call @ref swap().
- - [NullablePointer](http://en.cppreference.com/w/cpp/concept/NullablePointer):
+ - [NullablePointer](https://en.cppreference.com/w/cpp/named_req/NullablePointer):
    JSON values can be compared against `std::nullptr_t` objects which are used
    to model the `null` value.
 - Container
- - [Container](http://en.cppreference.com/w/cpp/concept/Container):
+ - [Container](https://en.cppreference.com/w/cpp/named_req/Container):
    JSON values can be used like STL containers and provide iterator access.
- - [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer);
+ - [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer);
    JSON values can be used like STL containers and provide reverse iterator
    access.
 
@@ -169,8 +171,12 @@ class basic_json
     friend class ::nlohmann::detail::iter_impl;
     template<typename BasicJsonType, typename CharType>
     friend class ::nlohmann::detail::binary_writer;
-    template<typename BasicJsonType>
+    template<typename BasicJsonType, typename SAX>
     friend class ::nlohmann::detail::binary_reader;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::json_sax_dom_parser;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::json_sax_dom_callback_parser;
 
     /// workaround type for MSVC
     using basic_json_t = NLOHMANN_BASIC_JSON_TPL;
@@ -198,13 +204,17 @@ class basic_json
 
   public:
     using value_t = detail::value_t;
-    /// @copydoc nlohmann::json_pointer
+    /// JSON Pointer, see @ref nlohmann::json_pointer
     using json_pointer = ::nlohmann::json_pointer<basic_json>;
     template<typename T, typename SFINAE>
     using json_serializer = JSONSerializer<T, SFINAE>;
     /// helper type for initializer lists of basic_json values
     using initializer_list_t = std::initializer_list<detail::json_ref<basic_json>>;
 
+    using input_format_t = detail::input_format_t;
+    /// SAX interface type, see @ref nlohmann::json_sax
+    using json_sax_t = json_sax<basic_json>;
+
     ////////////////
     // exceptions //
     ////////////////
@@ -937,7 +947,7 @@ class basic_json
                     object = nullptr;  // silence warning, see #821
                     if (JSON_UNLIKELY(t == value_t::null))
                     {
-                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.1.2")); // LCOV_EXCL_LINE
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.2.0")); // LCOV_EXCL_LINE
                     }
                     break;
                 }
@@ -1105,7 +1115,6 @@ class basic_json
     */
     using parser_callback_t = typename parser::parser_callback_t;
 
-
     //////////////////
     // constructors //
     //////////////////
@@ -1267,7 +1276,7 @@ class basic_json
     was provided), strong guarantee holds: if an exception is thrown, there are
     no changes to any JSON value.
 
-    @since version 3.1.2
+    @since version 3.2.0
     */
     template <typename BasicJsonType,
               detail::enable_if_t<
@@ -1587,7 +1596,7 @@ class basic_json
     @warning A precondition is enforced with a runtime assertion that will
              result in calling `std::abort` if this precondition is not met.
              Assertions can be disabled by defining `NDEBUG` at compile time.
-             See http://en.cppreference.com/w/cpp/error/assert for more
+             See https://en.cppreference.com/w/cpp/error/assert for more
              information.
 
     @throw invalid_iterator.201 if iterators @a first and @a last are not
@@ -1727,7 +1736,7 @@ class basic_json
     changes to any JSON value.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is linear.
     - As postcondition, it holds: `other == basic_json(other)`.
@@ -1812,7 +1821,7 @@ class basic_json
     exceptions.
 
     @requirement This function helps `basic_json` satisfying the
-    [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible)
+    [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible)
     requirements.
 
     @liveexample{The code below shows the move constructor explicitly called
@@ -1846,7 +1855,7 @@ class basic_json
     @complexity Linear.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is linear.
 
@@ -1883,7 +1892,7 @@ class basic_json
     @complexity Linear.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is linear.
     - All stored elements are destroyed and all memory is freed.
@@ -2500,7 +2509,7 @@ class basic_json
     @complexity Depending on the implementation of the called `from_json()`
                 method.
 
-    @since version 3.1.2
+    @since version 3.2.0
     */
     template<typename BasicJsonType, detail::enable_if_t<
                  not std::is_same<BasicJsonType, basic_json>::value and
@@ -2514,8 +2523,8 @@ class basic_json
     @brief get a value (explicit)
 
     Explicit type conversion between the JSON value and a compatible value
-    which is [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible)
-    and [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible).
+    which is [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+    and [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
     The value is converted by calling the @ref json_serializer<ValueType>
     `from_json()` method.
 
@@ -2575,8 +2584,8 @@ class basic_json
     @brief get a value (explicit); special case
 
     Explicit type conversion between the JSON value and a compatible value
-    which is **not** [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible)
-    and **not** [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible).
+    which is **not** [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+    and **not** [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
     The value is converted by calling the @ref json_serializer<ValueType>
     `from_json()` method.
 
@@ -2821,9 +2830,9 @@ class basic_json
                    not detail::is_basic_json<ValueType>::value
 #ifndef _MSC_VER  // fix for issue #167 operator<< ambiguity under VS2015
                    and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
-#endif
-#if defined(JSON_HAS_CPP_17)
+#if defined(JSON_HAS_CPP_17) && defined(_MSC_VER) and _MSC_VER <= 1914
                    and not std::is_same<ValueType, typename std::string_view>::value
+#endif
 #endif
                    , int >::type = 0 >
     operator ValueType() const
@@ -3405,7 +3414,7 @@ class basic_json
     @return copy of the element at key @a key or @a default_value if @a key
     is not found
 
-    @throw type_error.306 if the JSON value is not an objec; in that case,
+    @throw type_error.306 if the JSON value is not an object; in that case,
     using `value()` with a key makes no sense.
 
     @complexity Logarithmic in the size of the container.
@@ -3429,7 +3438,7 @@ class basic_json
             {
                 return ptr.get_checked(this);
             }
-            JSON_CATCH (out_of_range&)
+            JSON_INTERNAL_CATCH (out_of_range&)
             {
                 return default_value;
             }
@@ -3940,7 +3949,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
 
@@ -3979,7 +3988,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).begin()`.
@@ -4011,7 +4020,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
 
@@ -4050,7 +4059,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).end()`.
@@ -4080,7 +4089,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `reverse_iterator(end())`.
@@ -4117,7 +4126,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `reverse_iterator(begin())`.
@@ -4154,7 +4163,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).rbegin()`.
@@ -4183,7 +4192,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).rend()`.
@@ -4324,7 +4333,7 @@ class basic_json
 
     @complexity Constant.
 
-    @since version 3.x.x.
+    @since version 3.1.0.
     */
     iteration_proxy<iterator> items() noexcept
     {
@@ -4381,7 +4390,7 @@ class basic_json
     false in the case of a string.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `begin() == end()`.
@@ -4452,7 +4461,7 @@ class basic_json
     the case of a string.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `std::distance(begin(), end())`.
@@ -4522,7 +4531,7 @@ class basic_json
     @exceptionsafety No-throw guarantee: this function never throws exceptions.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of returning `b.size()` where `b` is the largest
@@ -5991,7 +6000,7 @@ class basic_json
 
     @since version 2.0.3 (contiguous containers)
     */
-    static basic_json parse(detail::input_adapter i,
+    static basic_json parse(detail::input_adapter&& i,
                             const parser_callback_t cb = nullptr,
                             const bool allow_exceptions = true)
     {
@@ -6000,26 +6009,80 @@ class basic_json
         return result;
     }
 
+    static bool accept(detail::input_adapter&& i)
+    {
+        return parser(i).accept(true);
+    }
+
     /*!
-    @copydoc basic_json parse(detail::input_adapter, const parser_callback_t)
+    @brief generate SAX events
+
+    The SAX event lister must follow the interface of @ref json_sax.
+
+    This function reads from a compatible input. Examples are:
+    - an array of 1-byte values
+    - strings with character/literal type with size of 1 byte
+    - input streams
+    - container with contiguous storage of 1-byte values. Compatible container
+      types include `std::vector`, `std::string`, `std::array`,
+      `std::valarray`, and `std::initializer_list`. Furthermore, C-style
+      arrays can be used with `std::begin()`/`std::end()`. User-defined
+      containers can be used as long as they implement random-access iterators
+      and a contiguous storage.
+
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @pre The container storage is contiguous. Violating this precondition
+    yields undefined behavior. **This precondition is enforced with an
+    assertion.**
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @warning There is no way to enforce all preconditions at compile-time. If
+             the function is called with a noncompliant container and with
+             assertions switched off, the behavior is undefined and will most
+             likely yield segmentation violation.
+
+    @param[in] i  input to read from
+    @param[in,out] sax  SAX event listener
+    @param[in] format  the format to parse (JSON, CBOR, MessagePack, or UBJSON)
+    @param[in] strict  whether the input has to be consumed completely
+
+    @return return value of the last processed SAX event
+
+    @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+    of input; expected string literal""`
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the SAX consumer @a sax has
+    a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `sax_parse()` function
+    reading from string and processing the events with a user-defined SAX
+    event consumer.,sax_parse}
+
+    @since version 3.2.0
     */
-    static basic_json parse(detail::input_adapter& i,
-                            const parser_callback_t cb = nullptr,
-                            const bool allow_exceptions = true)
+    template <typename SAX>
+    static bool sax_parse(detail::input_adapter&& i, SAX* sax,
+                          input_format_t format = input_format_t::json,
+                          const bool strict = true)
     {
-        basic_json result;
-        parser(i, cb, allow_exceptions).parse(true, result);
-        return result;
-    }
-
-    static bool accept(detail::input_adapter i)
-    {
-        return parser(i).accept(true);
-    }
-
-    static bool accept(detail::input_adapter& i)
-    {
-        return parser(i).accept(true);
+        assert(sax);
+        switch (format)
+        {
+            case input_format_t::json:
+                return parser(std::move(i)).sax_parse(sax, strict);
+            default:
+                return detail::binary_reader<basic_json, SAX>(std::move(i)).sax_parse(format, sax, strict);
+        }
     }
 
     /*!
@@ -6091,6 +6154,15 @@ class basic_json
         return parser(detail::input_adapter(first, last)).accept(true);
     }
 
+    template<class IteratorType, class SAX, typename std::enable_if<
+                 std::is_base_of<
+                     std::random_access_iterator_tag,
+                     typename std::iterator_traits<IteratorType>::iterator_category>::value, int>::type = 0>
+    static bool sax_parse(IteratorType first, IteratorType last, SAX* sax)
+    {
+        return parser(detail::input_adapter(first, last)).sax_parse(sax);
+    }
+
     /*!
     @brief deserialize from stream
     @deprecated This stream operator is deprecated and will be removed in
@@ -6587,6 +6659,9 @@ class basic_json
     @param[in] i  an input in CBOR format convertible to an input adapter
     @param[in] strict  whether to expect the input to be consumed until EOF
                        (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
     @return deserialized JSON value
 
     @throw parse_error.110 if the given input ends prematurely or the end of
@@ -6602,29 +6677,39 @@ class basic_json
 
     @sa http://cbor.io
     @sa @ref to_cbor(const basic_json&) for the analogous serialization
-    @sa @ref from_msgpack(detail::input_adapter, const bool) for the
+    @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for the
         related MessagePack format
-    @sa @ref from_ubjson(detail::input_adapter, const bool) for the related
-        UBJSON format
+    @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for the
+        related UBJSON format
 
     @since version 2.0.9; parameter @a start_index since 2.1.1; changed to
            consume input adapters, removed start_index parameter, and added
-           @a strict parameter since 3.0.0
+           @a strict parameter since 3.0.0; added @allow_exceptions parameter
+           since 3.2.0
     */
-    static basic_json from_cbor(detail::input_adapter i,
-                                const bool strict = true)
+    static basic_json from_cbor(detail::input_adapter&& i,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
     {
-        return binary_reader(i).parse_cbor(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::cbor, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
-    @copydoc from_cbor(detail::input_adapter, const bool)
+    @copydoc from_cbor(detail::input_adapter, const bool, const bool)
     */
     template<typename A1, typename A2,
              detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
-    static basic_json from_cbor(A1 && a1, A2 && a2, const bool strict = true)
+    static basic_json from_cbor(A1 && a1, A2 && a2,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
     {
-        return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_cbor(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).sax_parse(input_format_t::cbor, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
@@ -6677,6 +6762,10 @@ class basic_json
                   adapter
     @param[in] strict  whether to expect the input to be consumed until EOF
                        (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value
 
     @throw parse_error.110 if the given input ends prematurely or the end of
     file was not reached when @a strict was set to true
@@ -6691,29 +6780,39 @@ class basic_json
 
     @sa http://msgpack.org
     @sa @ref to_msgpack(const basic_json&) for the analogous serialization
-    @sa @ref from_cbor(detail::input_adapter, const bool) for the related CBOR
-        format
-    @sa @ref from_ubjson(detail::input_adapter, const bool) for the related
-        UBJSON format
+    @sa @ref from_cbor(detail::input_adapter, const bool, const bool) for the
+        related CBOR format
+    @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for
+        the related UBJSON format
 
     @since version 2.0.9; parameter @a start_index since 2.1.1; changed to
            consume input adapters, removed start_index parameter, and added
-           @a strict parameter since 3.0.0
+           @a strict parameter since 3.0.0; added @allow_exceptions parameter
+           since 3.2.0
     */
-    static basic_json from_msgpack(detail::input_adapter i,
-                                   const bool strict = true)
+    static basic_json from_msgpack(detail::input_adapter&& i,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
     {
-        return binary_reader(i).parse_msgpack(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
-    @copydoc from_msgpack(detail::input_adapter, const bool)
+    @copydoc from_msgpack(detail::input_adapter, const bool, const bool)
     */
     template<typename A1, typename A2,
              detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
-    static basic_json from_msgpack(A1 && a1, A2 && a2, const bool strict = true)
+    static basic_json from_msgpack(A1 && a1, A2 && a2,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
     {
-        return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_msgpack(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
@@ -6748,6 +6847,10 @@ class basic_json
     @param[in] i  an input in UBJSON format convertible to an input adapter
     @param[in] strict  whether to expect the input to be consumed until EOF
                        (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value
 
     @throw parse_error.110 if the given input ends prematurely or the end of
     file was not reached when @a strict was set to true
@@ -6762,24 +6865,36 @@ class basic_json
     @sa http://ubjson.org
     @sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
              analogous serialization
-    @sa @ref from_cbor(detail::input_adapter, const bool) for the related CBOR
-        format
-    @sa @ref from_msgpack(detail::input_adapter, const bool) for the related
-        MessagePack format
+    @sa @ref from_cbor(detail::input_adapter, const bool, const bool) for the
+        related CBOR format
+    @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for
+        the related MessagePack format
 
-    @since version 3.1.0
+    @since version 3.1.0; added @allow_exceptions parameter since 3.2.0
     */
-    static basic_json from_ubjson(detail::input_adapter i,
-                                  const bool strict = true)
+    static basic_json from_ubjson(detail::input_adapter&& i,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
     {
-        return binary_reader(i).parse_ubjson(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
+    /*!
+    @copydoc from_ubjson(detail::input_adapter, const bool, const bool)
+    */
     template<typename A1, typename A2,
              detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
-    static basic_json from_ubjson(A1 && a1, A2 && a2, const bool strict = true)
+    static basic_json from_ubjson(A1 && a1, A2 && a2,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
     {
-        return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_ubjson(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /// @}
@@ -7156,11 +7271,13 @@ class basic_json
                         break;
                     }
 
+                    // LCOV_EXCL_START
                     default:
                     {
                         // if there exists a parent it cannot be primitive
-                        assert(false);  // LCOV_EXCL_LINE
+                        assert(false);
                     }
+                        // LCOV_EXCL_STOP
                 }
             }
         };
@@ -7302,7 +7419,7 @@ class basic_json
                         // the "path" location must exist - use at()
                         success = (result.at(ptr) == get_value("test", "value", false));
                     }
-                    JSON_CATCH (out_of_range&)
+                    JSON_INTERNAL_CATCH (out_of_range&)
                     {
                         // ignore out of range errors: success remains false
                     }
@@ -7580,11 +7697,10 @@ namespace std
 @since version 1.0.0
 */
 template<>
-inline void swap(nlohmann::json& j1,
-                 nlohmann::json& j2) noexcept(
-                     is_nothrow_move_constructible<nlohmann::json>::value and
-                     is_nothrow_move_assignable<nlohmann::json>::value
-                 )
+inline void swap<nlohmann::json>(nlohmann::json& j1, nlohmann::json& j2) noexcept(
+    is_nothrow_move_constructible<nlohmann::json>::value and
+    is_nothrow_move_assignable<nlohmann::json>::value
+)
 {
     j1.swap(j2);
 }
diff --git a/include/nlohmann/json_fwd.hpp b/include/nlohmann/json_fwd.hpp
index 750adb64..5ff0d753 100644
--- a/include/nlohmann/json_fwd.hpp
+++ b/include/nlohmann/json_fwd.hpp
@@ -18,10 +18,10 @@ namespace nlohmann
 @brief default JSONSerializer template argument
 
 This serializer ignores the template arguments and uses ADL
-([argument-dependent lookup](http://en.cppreference.com/w/cpp/language/adl))
+([argument-dependent lookup](https://en.cppreference.com/w/cpp/language/adl))
 for serialization.
 */
-template<typename = void, typename = void>
+template<typename T = void, typename SFINAE = void>
 struct adl_serializer;
 
 template<template<typename U, typename V, typename... Args> class ObjectType =
diff --git a/meson.build b/meson.build
index cdbaad90..c79dcd3e 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,9 @@
 project('nlohmann_json', 'cpp')
 
-nlohmann_json_inc = include_directories('single_include/nlohmann')
-
 nlohmann_json_dep = declare_dependency(
-  include_directories : nlohmann_json_inc
+  include_directories: include_directories('single_include')
+)
+
+nlohmann_json_multiple_headers = declare_dependency(
+  include_directories: include_directories('include')
 )
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 6b6655af..b80386f3 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -30,8 +31,8 @@ SOFTWARE.
 #define NLOHMANN_JSON_HPP
 
 #define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 1
-#define NLOHMANN_JSON_VERSION_PATCH 2
+#define NLOHMANN_JSON_VERSION_MINOR 2
+#define NLOHMANN_JSON_VERSION_PATCH 0
 
 #include <algorithm> // all_of, find, for_each
 #include <cassert> // assert
@@ -66,10 +67,10 @@ namespace nlohmann
 @brief default JSONSerializer template argument
 
 This serializer ignores the template arguments and uses ADL
-([argument-dependent lookup](http://en.cppreference.com/w/cpp/language/adl))
+([argument-dependent lookup](https://en.cppreference.com/w/cpp/language/adl))
 for serialization.
 */
-template<typename = void, typename = void>
+template<typename T = void, typename SFINAE = void>
 struct adl_serializer;
 
 template<template<typename U, typename V, typename... Args> class ObjectType =
@@ -118,13 +119,15 @@ using json = basic_json<>;
 // You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them
 
 // exclude unsupported compilers
-#if defined(__clang__)
-    #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
-        #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
-    #endif
-#elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
-    #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
-        #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
+#if !defined(JSON_SKIP_UNSUPPORTED_COMPILER_CHECK)
+    #if defined(__clang__)
+        #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
+            #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
+        #endif
+    #elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
+        #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
+            #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
+        #endif
     #endif
 #endif
 
@@ -154,10 +157,12 @@ using json = basic_json<>;
     #define JSON_THROW(exception) throw exception
     #define JSON_TRY try
     #define JSON_CATCH(exception) catch(exception)
+    #define JSON_INTERNAL_CATCH(exception) catch(exception)
 #else
     #define JSON_THROW(exception) std::abort()
     #define JSON_TRY if(true)
     #define JSON_CATCH(exception) if(false)
+    #define JSON_INTERNAL_CATCH(exception) if(false)
 #endif
 
 // override exception macros
@@ -172,6 +177,11 @@ using json = basic_json<>;
 #if defined(JSON_CATCH_USER)
     #undef JSON_CATCH
     #define JSON_CATCH JSON_CATCH_USER
+    #define JSON_INTERNAL_CATCH JSON_CATCH_USER
+#endif
+#if defined(JSON_INTERNAL_CATCH_USER)
+    #undef JSON_INTERNAL_CATCH
+    #define JSON_INTERNAL_CATCH JSON_INTERNAL_CATCH_USER
 #endif
 
 // manual branch prediction
@@ -228,41 +238,17 @@ contains a `mapped_type`, whereas `std::vector` fails the test.
                 std::is_integral<decltype(detect(std::declval<T>()))>::value; \
     }
 
-// #include <nlohmann/detail/meta.hpp>
+// #include <nlohmann/detail/meta/cpp_future.hpp>
 
 
 #include <ciso646> // not
 #include <cstddef> // size_t
-#include <limits> // numeric_limits
 #include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
-#include <utility> // declval
-
-// #include <nlohmann/json_fwd.hpp>
-
-// #include <nlohmann/detail/macro_scope.hpp>
-
 
 namespace nlohmann
 {
-/*!
-@brief detail namespace with internal helper functions
-
-This namespace collects functions that should not be exposed,
-implementations of some @ref basic_json methods, and meta-programming helpers.
-
-@since version 2.1.0
-*/
 namespace detail
 {
-/////////////
-// helpers //
-/////////////
-
-template<typename> struct is_basic_json : std::false_type {};
-
-NLOHMANN_BASIC_JSON_TPL_DECLARATION
-struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
-
 // alias templates to reduce boilerplate
 template<bool B, typename T = void>
 using enable_if_t = typename std::enable_if<B, T>::type;
@@ -325,6 +311,54 @@ template<class B> struct negation : std::integral_constant<bool, not B::value> {
 template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
 template<> struct priority_tag<0> {};
 
+// taken from ranges-v3
+template<typename T>
+struct static_const
+{
+    static constexpr T value{};
+};
+
+template<typename T>
+constexpr T static_const<T>::value;
+}
+}
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+#include <ciso646> // not
+#include <limits> // numeric_limits
+#include <type_traits> // false_type, is_constructible, is_integral, is_same, true_type
+#include <utility> // declval
+
+// #include <nlohmann/json_fwd.hpp>
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+/*!
+@brief detail namespace with internal helper functions
+
+This namespace collects functions that should not be exposed,
+implementations of some @ref basic_json methods, and meta-programming helpers.
+
+@since version 2.1.0
+*/
+namespace detail
+{
+/////////////
+// helpers //
+/////////////
+
+template<typename> struct is_basic_json : std::false_type {};
+
+NLOHMANN_BASIC_JSON_TPL_DECLARATION
+struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
+
 ////////////////////////
 // has_/is_ functions //
 ////////////////////////
@@ -353,6 +387,17 @@ struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
         std::is_constructible<typename RealType::mapped_type, typename CompatibleObjectType::mapped_type>::value;
 };
 
+template<bool B, class RealType, class CompatibleStringType>
+struct is_compatible_string_type_impl : std::false_type {};
+
+template<class RealType, class CompatibleStringType>
+struct is_compatible_string_type_impl<true, RealType, CompatibleStringType>
+{
+    static constexpr auto value =
+        std::is_same<typename RealType::value_type, typename CompatibleStringType::value_type>::value and
+        std::is_constructible<RealType, CompatibleStringType>::value;
+};
+
 template<class BasicJsonType, class CompatibleObjectType>
 struct is_compatible_object_type
 {
@@ -363,6 +408,15 @@ struct is_compatible_object_type
                                   typename BasicJsonType::object_t, CompatibleObjectType >::value;
 };
 
+template<class BasicJsonType, class CompatibleStringType>
+struct is_compatible_string_type
+{
+    static auto constexpr value = is_compatible_string_type_impl <
+                                  conjunction<negation<std::is_same<void, CompatibleStringType>>,
+                                  has_value_type<CompatibleStringType>>::value,
+                                  typename BasicJsonType::string_t, CompatibleStringType >::value;
+};
+
 template<typename BasicJsonType, typename T>
 struct is_basic_json_nested_type
 {
@@ -477,16 +531,6 @@ struct is_compatible_type
       is_compatible_complete_type<BasicJsonType, CompatibleType>>
 {
 };
-
-// taken from ranges-v3
-template<typename T>
-struct static_const
-{
-    static constexpr T value{};
-};
-
-template<typename T>
-constexpr T static_const<T>::value;
 }
 }
 
@@ -908,9 +952,11 @@ inline bool operator<(const value_t lhs, const value_t rhs) noexcept
 #include <ciso646> // and, not
 #include <forward_list> // forward_list
 #include <iterator> // inserter, front_inserter, end
+#include <map> // map
 #include <string> // string
 #include <tuple> // tuple, make_tuple
 #include <type_traits> // is_arithmetic, is_same, is_enum, underlying_type, is_convertible
+#include <unordered_map> // unordered_map
 #include <utility> // pair, declval
 #include <valarray> // valarray
 
@@ -918,7 +964,9 @@ inline bool operator<(const value_t lhs, const value_t rhs) noexcept
 
 // #include <nlohmann/detail/macro_scope.hpp>
 
-// #include <nlohmann/detail/meta.hpp>
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
 
 // #include <nlohmann/detail/value_t.hpp>
 
@@ -927,6 +975,16 @@ namespace nlohmann
 {
 namespace detail
 {
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
+{
+    if (JSON_UNLIKELY(not j.is_null()))
+    {
+        JSON_THROW(type_error::create(302, "type must be null, but is " + std::string(j.type_name())));
+    }
+    n = nullptr;
+}
+
 // overloads for basic_json template parameters
 template<typename BasicJsonType, typename ArithmeticType,
          enable_if_t<std::is_arithmetic<ArithmeticType>::value and
@@ -977,6 +1035,23 @@ void from_json(const BasicJsonType& j, typename BasicJsonType::string_t& s)
     s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
 }
 
+template <
+    typename BasicJsonType, typename CompatibleStringType,
+    enable_if_t <
+        is_compatible_string_type<BasicJsonType, CompatibleStringType>::value and
+        not std::is_same<typename BasicJsonType::string_t,
+                         CompatibleStringType>::value,
+        int > = 0 >
+void from_json(const BasicJsonType& j, CompatibleStringType& s)
+{
+    if (JSON_UNLIKELY(not j.is_string()))
+    {
+        JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name())));
+    }
+
+    s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+
 template<typename BasicJsonType>
 void from_json(const BasicJsonType& j, typename BasicJsonType::number_float_t& val)
 {
@@ -1184,6 +1259,44 @@ void from_json(const BasicJsonType& j, std::tuple<Args...>& t)
     from_json_tuple_impl(j, t, index_sequence_for<Args...> {});
 }
 
+template <typename BasicJsonType, typename Key, typename Value, typename Compare, typename Allocator,
+          typename = enable_if_t<not std::is_constructible<
+                                     typename BasicJsonType::string_t, Key>::value>>
+void from_json(const BasicJsonType& j, std::map<Key, Value, Compare, Allocator>& m)
+{
+    if (JSON_UNLIKELY(not j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+    }
+    for (const auto& p : j)
+    {
+        if (JSON_UNLIKELY(not p.is_array()))
+        {
+            JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name())));
+        }
+        m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+    }
+}
+
+template <typename BasicJsonType, typename Key, typename Value, typename Hash, typename KeyEqual, typename Allocator,
+          typename = enable_if_t<not std::is_constructible<
+                                     typename BasicJsonType::string_t, Key>::value>>
+void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyEqual, Allocator>& m)
+{
+    if (JSON_UNLIKELY(not j.is_array()))
+    {
+        JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+    }
+    for (const auto& p : j)
+    {
+        if (JSON_UNLIKELY(not p.is_array()))
+        {
+            JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name())));
+        }
+        m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+    }
+}
+
 struct from_json_fn
 {
   private:
@@ -1238,10 +1351,143 @@ constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::va
 #include <valarray> // valarray
 #include <vector> // vector
 
-// #include <nlohmann/detail/meta.hpp>
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
 
 // #include <nlohmann/detail/value_t.hpp>
 
+// #include <nlohmann/detail/iterators/iteration_proxy.hpp>
+
+
+#include <cstddef> // size_t
+#include <string> // string, to_string
+#include <iterator> // input_iterator_tag
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+/// proxy class for the items() function
+template<typename IteratorType> class iteration_proxy
+{
+  private:
+    /// helper class for iteration
+    class iteration_proxy_internal
+    {
+      public:
+        using difference_type = std::ptrdiff_t;
+        using value_type = iteration_proxy_internal;
+        using pointer = iteration_proxy_internal*;
+        using reference = iteration_proxy_internal&;
+        using iterator_category = std::input_iterator_tag;
+
+      private:
+        /// the iterator
+        IteratorType anchor;
+        /// an index for arrays (used to create key names)
+        std::size_t array_index = 0;
+        /// last stringified array index
+        mutable std::size_t array_index_last = 0;
+        /// a string representation of the array index
+        mutable std::string array_index_str = "0";
+        /// an empty string (to return a reference for primitive values)
+        const std::string empty_str = "";
+
+      public:
+        explicit iteration_proxy_internal(IteratorType it) noexcept : anchor(it) {}
+
+        iteration_proxy_internal(const iteration_proxy_internal&) = default;
+        iteration_proxy_internal& operator=(const iteration_proxy_internal&) = default;
+
+        /// dereference operator (needed for range-based for)
+        iteration_proxy_internal& operator*()
+        {
+            return *this;
+        }
+
+        /// increment operator (needed for range-based for)
+        iteration_proxy_internal& operator++()
+        {
+            ++anchor;
+            ++array_index;
+
+            return *this;
+        }
+
+        /// equality operator (needed for InputIterator)
+        bool operator==(const iteration_proxy_internal& o) const noexcept
+        {
+            return anchor == o.anchor;
+        }
+
+        /// inequality operator (needed for range-based for)
+        bool operator!=(const iteration_proxy_internal& o) const noexcept
+        {
+            return anchor != o.anchor;
+        }
+
+        /// return key of the iterator
+        const std::string& key() const
+        {
+            assert(anchor.m_object != nullptr);
+
+            switch (anchor.m_object->type())
+            {
+                // use integer array index as key
+                case value_t::array:
+                {
+                    if (array_index != array_index_last)
+                    {
+                        array_index_str = std::to_string(array_index);
+                        array_index_last = array_index;
+                    }
+                    return array_index_str;
+                }
+
+                // use key from the object
+                case value_t::object:
+                    return anchor.key();
+
+                // use an empty key for all primitive types
+                default:
+                    return empty_str;
+            }
+        }
+
+        /// return value of the iterator
+        typename IteratorType::reference value() const
+        {
+            return anchor.value();
+        }
+    };
+
+    /// the container to iterate
+    typename IteratorType::reference container;
+
+  public:
+    /// construct iteration proxy from a container
+    explicit iteration_proxy(typename IteratorType::reference cont) noexcept
+        : container(cont) {}
+
+    /// return iterator begin (needed for range-based for)
+    iteration_proxy_internal begin() noexcept
+    {
+        return iteration_proxy_internal(container.begin());
+    }
+
+    /// return iterator end (needed for range-based for)
+    iteration_proxy_internal end() noexcept
+    {
+        return iteration_proxy_internal(container.end());
+    }
+};
+}
+}
+
 
 namespace nlohmann
 {
@@ -1283,6 +1529,16 @@ struct external_constructor<value_t::string>
         j.m_value = std::move(s);
         j.assert_invariant();
     }
+
+    template<typename BasicJsonType, typename CompatibleStringType,
+             enable_if_t<not std::is_same<CompatibleStringType, typename BasicJsonType::string_t>::value,
+                         int> = 0>
+    static void construct(BasicJsonType& j, const CompatibleStringType& str)
+    {
+        j.m_type = value_t::string;
+        j.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
+        j.assert_invariant();
+    }
 };
 
 template<>
@@ -1479,7 +1735,7 @@ void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
 
 template<typename BasicJsonType, typename T,
          enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
-void to_json(BasicJsonType& j, std::valarray<T> arr)
+void to_json(BasicJsonType& j, const std::valarray<T>& arr)
 {
     external_constructor<value_t::array>::construct(j, std::move(arr));
 }
@@ -1516,6 +1772,14 @@ void to_json(BasicJsonType& j, const std::pair<Args...>& p)
     j = {p.first, p.second};
 }
 
+// for https://github.com/nlohmann/json/pull/1134
+template<typename BasicJsonType, typename T,
+         enable_if_t<std::is_same<T, typename iteration_proxy<typename BasicJsonType::iterator>::iteration_proxy_internal>::value, int> = 0>
+void to_json(BasicJsonType& j, T b) noexcept
+{
+    j = {{b.key(), b.value()}};
+}
+
 template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
 void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...>)
 {
@@ -1572,12 +1836,9 @@ constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
 // #include <nlohmann/detail/input/input_adapters.hpp>
 
 
-#include <algorithm> // min
-#include <array> // array
 #include <cassert> // assert
 #include <cstddef> // size_t
 #include <cstring> // strlen
-#include <ios> // streamsize, streamoff, streampos
 #include <istream> // istream
 #include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
 #include <memory> // shared_ptr, make_shared, addressof
@@ -1593,6 +1854,9 @@ namespace nlohmann
 {
 namespace detail
 {
+/// the supported input formats
+enum class input_format_t { json, cbor, msgpack, ubjson };
+
 ////////////////////
 // input adapters //
 ////////////////////
@@ -1601,19 +1865,17 @@ namespace detail
 @brief abstract input adapter interface
 
 Produces a stream of std::char_traits<char>::int_type characters from a
-std::istream, a buffer, or some other input type.  Accepts the return of exactly
-one non-EOF character for future input.  The int_type characters returned
-consist of all valid char values as positive values (typically unsigned char),
-plus an EOF value outside that range, specified by the value of the function
-std::char_traits<char>::eof().  This value is typically -1, but could be any
-arbitrary value which is not a valid char value.
+std::istream, a buffer, or some other input type. Accepts the return of
+exactly one non-EOF character for future input. The int_type characters
+returned consist of all valid char values as positive values (typically
+unsigned char), plus an EOF value outside that range, specified by the value
+of the function std::char_traits<char>::eof(). This value is typically -1, but
+could be any arbitrary value which is not a valid char value.
 */
 struct input_adapter_protocol
 {
     /// get a character [0,255] or std::char_traits<char>::eof().
     virtual std::char_traits<char>::int_type get_character() = 0;
-    /// restore the last non-eof() character to input
-    virtual void unget_character() = 0;
     virtual ~input_adapter_protocol() = default;
 };
 
@@ -1641,34 +1903,7 @@ class input_stream_adapter : public input_adapter_protocol
 
     explicit input_stream_adapter(std::istream& i)
         : is(i), sb(*i.rdbuf())
-    {
-        // skip byte order mark
-        std::char_traits<char>::int_type c;
-        if ((c = get_character()) == 0xEF)
-        {
-            if ((c = get_character()) == 0xBB)
-            {
-                if ((c = get_character()) == 0xBF)
-                {
-                    return; // Ignore BOM
-                }
-                else if (c != std::char_traits<char>::eof())
-                {
-                    is.unget();
-                }
-                is.putback('\xBB');
-            }
-            else if (c != std::char_traits<char>::eof())
-            {
-                is.unget();
-            }
-            is.putback('\xEF');
-        }
-        else if (c != std::char_traits<char>::eof())
-        {
-            is.unget(); // no byte order mark; process as usual
-        }
-    }
+    {}
 
     // delete because of pointer members
     input_stream_adapter(const input_stream_adapter&) = delete;
@@ -1682,11 +1917,6 @@ class input_stream_adapter : public input_adapter_protocol
         return sb.sbumpc();
     }
 
-    void unget_character() override
-    {
-        sb.sungetc();  // is.unget() avoided for performance
-    }
-
   private:
     /// the associated input stream
     std::istream& is;
@@ -1698,14 +1928,8 @@ class input_buffer_adapter : public input_adapter_protocol
 {
   public:
     input_buffer_adapter(const char* b, const std::size_t l)
-        : cursor(b), limit(b + l), start(b)
-    {
-        // skip byte order mark
-        if (l >= 3 and b[0] == '\xEF' and b[1] == '\xBB' and b[2] == '\xBF')
-        {
-            cursor += 3;
-        }
-    }
+        : cursor(b), limit(b + l)
+    {}
 
     // delete because of pointer members
     input_buffer_adapter(const input_buffer_adapter&) = delete;
@@ -1721,21 +1945,164 @@ class input_buffer_adapter : public input_adapter_protocol
         return std::char_traits<char>::eof();
     }
 
-    void unget_character() noexcept override
-    {
-        if (JSON_LIKELY(cursor > start))
-        {
-            --cursor;
-        }
-    }
-
   private:
     /// pointer to the current character
     const char* cursor;
     /// pointer past the last character
-    const char* limit;
-    /// pointer to the first character
-    const char* start;
+    const char* const limit;
+};
+
+template<typename WideStringType>
+class wide_string_input_adapter : public input_adapter_protocol
+{
+  public:
+    explicit wide_string_input_adapter(const WideStringType& w) : str(w) {}
+
+    std::char_traits<char>::int_type get_character() noexcept override
+    {
+        // check if buffer needs to be filled
+        if (utf8_bytes_index == utf8_bytes_filled)
+        {
+            if (sizeof(typename WideStringType::value_type) == 2)
+            {
+                fill_buffer_utf16();
+            }
+            else
+            {
+                fill_buffer_utf32();
+            }
+
+            assert(utf8_bytes_filled > 0);
+            assert(utf8_bytes_index == 0);
+        }
+
+        // use buffer
+        assert(utf8_bytes_filled > 0);
+        assert(utf8_bytes_index < utf8_bytes_filled);
+        return utf8_bytes[utf8_bytes_index++];
+    }
+
+  private:
+    void fill_buffer_utf16()
+    {
+        utf8_bytes_index = 0;
+
+        if (current_wchar == str.size())
+        {
+            utf8_bytes[0] = std::char_traits<char>::eof();
+            utf8_bytes_filled = 1;
+        }
+        else
+        {
+            // get the current character
+            const int wc = static_cast<int>(str[current_wchar++]);
+
+            // UTF-16 to UTF-8 encoding
+            if (wc < 0x80)
+            {
+                utf8_bytes[0] = wc;
+                utf8_bytes_filled = 1;
+            }
+            else if (wc <= 0x7FF)
+            {
+                utf8_bytes[0] = 0xC0 | ((wc >> 6));
+                utf8_bytes[1] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 2;
+            }
+            else if (0xD800 > wc or wc >= 0xE000)
+            {
+                utf8_bytes[0] = 0xE0 | ((wc >> 12));
+                utf8_bytes[1] = 0x80 | ((wc >> 6) & 0x3F);
+                utf8_bytes[2] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 3;
+            }
+            else
+            {
+                if (current_wchar < str.size())
+                {
+                    const int wc2 = static_cast<int>(str[current_wchar++]);
+                    const int charcode = 0x10000 + (((wc & 0x3FF) << 10) | (wc2 & 0x3FF));
+                    utf8_bytes[0] = 0xf0 | (charcode >> 18);
+                    utf8_bytes[1] = 0x80 | ((charcode >> 12) & 0x3F);
+                    utf8_bytes[2] = 0x80 | ((charcode >> 6) & 0x3F);
+                    utf8_bytes[3] = 0x80 | (charcode & 0x3F);
+                    utf8_bytes_filled = 4;
+                }
+                else
+                {
+                    // unknown character
+                    ++current_wchar;
+                    utf8_bytes[0] = wc;
+                    utf8_bytes_filled = 1;
+                }
+            }
+        }
+    }
+
+    void fill_buffer_utf32()
+    {
+        utf8_bytes_index = 0;
+
+        if (current_wchar == str.size())
+        {
+            utf8_bytes[0] = std::char_traits<char>::eof();
+            utf8_bytes_filled = 1;
+        }
+        else
+        {
+            // get the current character
+            const int wc = static_cast<int>(str[current_wchar++]);
+
+            // UTF-32 to UTF-8 encoding
+            if (wc < 0x80)
+            {
+                utf8_bytes[0] = wc;
+                utf8_bytes_filled = 1;
+            }
+            else if (wc <= 0x7FF)
+            {
+                utf8_bytes[0] = 0xC0 | ((wc >> 6) & 0x1F);
+                utf8_bytes[1] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 2;
+            }
+            else if (wc <= 0xFFFF)
+            {
+                utf8_bytes[0] = 0xE0 | ((wc >> 12) & 0x0F);
+                utf8_bytes[1] = 0x80 | ((wc >> 6) & 0x3F);
+                utf8_bytes[2] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 3;
+            }
+            else if (wc <= 0x10FFFF)
+            {
+                utf8_bytes[0] = 0xF0 | ((wc >> 18 ) & 0x07);
+                utf8_bytes[1] = 0x80 | ((wc >> 12) & 0x3F);
+                utf8_bytes[2] = 0x80 | ((wc >> 6) & 0x3F);
+                utf8_bytes[3] = 0x80 | (wc & 0x3F);
+                utf8_bytes_filled = 4;
+            }
+            else
+            {
+                // unknown character
+                utf8_bytes[0] = wc;
+                utf8_bytes_filled = 1;
+            }
+        }
+    }
+
+  private:
+    /// the wstring to process
+    const WideStringType& str;
+
+    /// index of the current wchar in str
+    std::size_t current_wchar = 0;
+
+    /// a buffer for UTF-8 bytes
+    std::array<std::char_traits<char>::int_type, 4> utf8_bytes = {{0, 0, 0, 0}};
+
+    /// index to the utf8_codes array for the next valid byte
+    std::size_t utf8_bytes_index = 0;
+    /// number of valid bytes in the utf8_codes array
+    std::size_t utf8_bytes_filled = 0;
 };
 
 class input_adapter
@@ -1751,6 +2118,15 @@ class input_adapter
     input_adapter(std::istream&& i)
         : ia(std::make_shared<input_stream_adapter>(i)) {}
 
+    input_adapter(const std::wstring& ws)
+        : ia(std::make_shared<wide_string_input_adapter<std::wstring>>(ws)) {}
+
+    input_adapter(const std::u16string& ws)
+        : ia(std::make_shared<wide_string_input_adapter<std::u16string>>(ws)) {}
+
+    input_adapter(const std::u32string& ws)
+        : ia(std::make_shared<wide_string_input_adapter<std::u32string>>(ws)) {}
+
     /// input adapter for buffer
     template<typename CharT,
              typename std::enable_if<
@@ -1840,10 +2216,8 @@ class input_adapter
 #include <clocale> // localeconv
 #include <cstddef> // size_t
 #include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
+#include <cstdio> // snprintf
 #include <initializer_list> // initializer_list
-#include <ios> // hex, uppercase
-#include <iomanip> // setw, setfill
-#include <sstream> // stringstream
 #include <string> // char_traits, string
 #include <vector> // vector
 
@@ -1933,12 +2307,14 @@ class lexer
                 return "end of input";
             case token_type::literal_or_value:
                 return "'[', '{', or a literal";
+            // LCOV_EXCL_START
             default: // catch non-enum values
-                return "unknown token"; // LCOV_EXCL_LINE
+                return "unknown token";
+                // LCOV_EXCL_STOP
         }
     }
 
-    explicit lexer(detail::input_adapter_t adapter)
+    explicit lexer(detail::input_adapter_t&& adapter)
         : ia(std::move(adapter)), decimal_point_char(get_decimal_point()) {}
 
     // delete because of pointer members
@@ -2586,11 +2962,13 @@ class lexer
                 goto scan_number_any1;
             }
 
+            // LCOV_EXCL_START
             default:
             {
                 // all other characters are rejected outside scan_number()
-                assert(false); // LCOV_EXCL_LINE
+                assert(false);
             }
+                // LCOV_EXCL_STOP
         }
 
 scan_number_minus:
@@ -2920,7 +3298,16 @@ scan_number_done:
     std::char_traits<char>::int_type get()
     {
         ++chars_read;
-        current = ia->get_character();
+        if (next_unget)
+        {
+            // just reset the next_unget variable and work with current
+            next_unget = false;
+        }
+        else
+        {
+            current = ia->get_character();
+        }
+
         if (JSON_LIKELY(current != std::char_traits<char>::eof()))
         {
             token_string.push_back(std::char_traits<char>::to_char_type(current));
@@ -2928,13 +3315,20 @@ scan_number_done:
         return current;
     }
 
-    /// unget current character (return it again on next get)
+    /*!
+    @brief unget current character (read it again on next get)
+
+    We implement unget by setting variable next_unget to true. The input is not
+    changed - we just simulate ungetting by modifying chars_read and
+    token_string. The next call to get() will behave as if the unget character
+    is read again.
+    */
     void unget()
     {
+        next_unget = true;
         --chars_read;
         if (JSON_LIKELY(current != std::char_traits<char>::eof()))
         {
-            ia->unget_character();
             assert(token_string.size() != 0);
             token_string.pop_back();
         }
@@ -2970,9 +3364,9 @@ scan_number_done:
     }
 
     /// return current string value (implicitly resets the token; useful only once)
-    string_t&& move_string()
+    string_t& get_string()
     {
-        return std::move(token_buffer);
+        return token_buffer;
     }
 
     /////////////////////
@@ -2997,10 +3391,9 @@ scan_number_done:
             if ('\x00' <= c and c <= '\x1F')
             {
                 // escape control characters
-                std::stringstream ss;
-                ss << "<U+" << std::setw(4) << std::uppercase << std::setfill('0')
-                   << std::hex << static_cast<int>(c) << ">";
-                result += ss.str();
+                char cs[9];
+                snprintf(cs, 9, "<U+%.4X>", static_cast<unsigned char>(c));
+                result += cs;
             }
             else
             {
@@ -3022,8 +3415,43 @@ scan_number_done:
     // actual scanner
     /////////////////////
 
+    /*!
+    @brief skip the UTF-8 byte order mark
+    @return true iff there is no BOM or the correct BOM has been skipped
+    */
+    bool skip_bom()
+    {
+        if (get() == 0xEF)
+        {
+            if (get() == 0xBB and get() == 0xBF)
+            {
+                // we completely parsed the BOM
+                return true;
+            }
+            else
+            {
+                // after reading 0xEF, an unexpected character followed
+                return false;
+            }
+        }
+        else
+        {
+            // the first character is not the beginning of the BOM; unget it to
+            // process is later
+            unget();
+            return true;
+        }
+    }
+
     token_type scan()
     {
+        // initially, skip the BOM
+        if (chars_read == 0 and not skip_bom())
+        {
+            error_message = "invalid BOM; must be 0xEF 0xBB 0xBF if given";
+            return token_type::parse_error;
+        }
+
         // read next character and ignore whitespace
         do
         {
@@ -3093,6 +3521,9 @@ scan_number_done:
     /// the current character
     std::char_traits<char>::int_type current = std::char_traits<char>::eof();
 
+    /// whether the next get() call should just return current
+    bool next_unget = false;
+
     /// the number of characters read
     std::size_t chars_read = 0;
 
@@ -3130,8 +3561,926 @@ scan_number_done:
 
 // #include <nlohmann/detail/macro_scope.hpp>
 
+// #include <nlohmann/detail/meta/is_sax.hpp>
+
+
+#include <cstdint> // size_t
+#include <utility> // declval
+
+// #include <nlohmann/detail/meta/detected.hpp>
+
+
+#include <type_traits>
+
+// #include <nlohmann/detail/meta/void_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template <typename...>
+using void_t = void;
+}
+}
+
+
+// http://en.cppreference.com/w/cpp/experimental/is_detected
+namespace nlohmann
+{
+namespace detail
+{
+struct nonesuch
+{
+    nonesuch() = delete;
+    ~nonesuch() = delete;
+    nonesuch(nonesuch const&) = delete;
+    void operator=(nonesuch const&) = delete;
+};
+
+template <class Default,
+          class AlwaysVoid,
+          template <class...> class Op,
+          class... Args>
+struct detector
+{
+    using value_t = std::false_type;
+    using type = Default;
+};
+
+template <class Default, template <class...> class Op, class... Args>
+struct detector<Default, void_t<Op<Args...>>, Op, Args...>
+{
+    using value_t = std::true_type;
+    using type = Op<Args...>;
+};
+
+template <template <class...> class Op, class... Args>
+using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
+
+template <template <class...> class Op, class... Args>
+using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
+
+template <class Default, template <class...> class Op, class... Args>
+using detected_or = detector<Default, void, Op, Args...>;
+
+template <class Default, template <class...> class Op, class... Args>
+using detected_or_t = typename detected_or<Default, Op, Args...>::type;
+
+template <class Expected, template <class...> class Op, class... Args>
+using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
+
+template <class To, template <class...> class Op, class... Args>
+using is_detected_convertible =
+    std::is_convertible<detected_t<Op, Args...>, To>;
+}
+}
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template <typename T>
+using null_function_t = decltype(std::declval<T&>().null());
+
+template <typename T>
+using boolean_function_t =
+    decltype(std::declval<T&>().boolean(std::declval<bool>()));
+
+template <typename T, typename Integer>
+using number_integer_function_t =
+    decltype(std::declval<T&>().number_integer(std::declval<Integer>()));
+
+template <typename T, typename Unsigned>
+using number_unsigned_function_t =
+    decltype(std::declval<T&>().number_unsigned(std::declval<Unsigned>()));
+
+template <typename T, typename Float, typename String>
+using number_float_function_t = decltype(std::declval<T&>().number_float(
+                                    std::declval<Float>(), std::declval<const String&>()));
+
+template <typename T, typename String>
+using string_function_t =
+    decltype(std::declval<T&>().string(std::declval<String&>()));
+
+template <typename T>
+using start_object_function_t =
+    decltype(std::declval<T&>().start_object(std::declval<std::size_t>()));
+
+template <typename T, typename String>
+using key_function_t =
+    decltype(std::declval<T&>().key(std::declval<String&>()));
+
+template <typename T>
+using end_object_function_t = decltype(std::declval<T&>().end_object());
+
+template <typename T>
+using start_array_function_t =
+    decltype(std::declval<T&>().start_array(std::declval<std::size_t>()));
+
+template <typename T>
+using end_array_function_t = decltype(std::declval<T&>().end_array());
+
+template <typename T, typename Exception>
+using parse_error_function_t = decltype(std::declval<T&>().parse_error(
+        std::declval<std::size_t>(), std::declval<const std::string&>(),
+        std::declval<const Exception&>()));
+
+template <typename SAX, typename BasicJsonType>
+struct is_sax
+{
+  private:
+    static_assert(is_basic_json<BasicJsonType>::value,
+                  "BasicJsonType must be of type basic_json<...>");
+
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using exception_t = typename BasicJsonType::exception;
+
+  public:
+    static constexpr bool value =
+        is_detected_exact<bool, null_function_t, SAX>::value &&
+        is_detected_exact<bool, boolean_function_t, SAX>::value &&
+        is_detected_exact<bool, number_integer_function_t, SAX,
+        number_integer_t>::value &&
+        is_detected_exact<bool, number_unsigned_function_t, SAX,
+        number_unsigned_t>::value &&
+        is_detected_exact<bool, number_float_function_t, SAX, number_float_t,
+        string_t>::value &&
+        is_detected_exact<bool, string_function_t, SAX, string_t>::value &&
+        is_detected_exact<bool, start_object_function_t, SAX>::value &&
+        is_detected_exact<bool, key_function_t, SAX, string_t>::value &&
+        is_detected_exact<bool, end_object_function_t, SAX>::value &&
+        is_detected_exact<bool, start_array_function_t, SAX>::value &&
+        is_detected_exact<bool, end_array_function_t, SAX>::value &&
+        is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value;
+};
+
+template <typename SAX, typename BasicJsonType>
+struct is_sax_static_asserts
+{
+  private:
+    static_assert(is_basic_json<BasicJsonType>::value,
+                  "BasicJsonType must be of type basic_json<...>");
+
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using exception_t = typename BasicJsonType::exception;
+
+  public:
+    static_assert(is_detected_exact<bool, null_function_t, SAX>::value,
+                  "Missing/invalid function: bool null()");
+    static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+                  "Missing/invalid function: bool boolean(bool)");
+    static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+                  "Missing/invalid function: bool boolean(bool)");
+    static_assert(
+        is_detected_exact<bool, number_integer_function_t, SAX,
+        number_integer_t>::value,
+        "Missing/invalid function: bool number_integer(number_integer_t)");
+    static_assert(
+        is_detected_exact<bool, number_unsigned_function_t, SAX,
+        number_unsigned_t>::value,
+        "Missing/invalid function: bool number_unsigned(number_unsigned_t)");
+    static_assert(is_detected_exact<bool, number_float_function_t, SAX,
+                  number_float_t, string_t>::value,
+                  "Missing/invalid function: bool number_float(number_float_t, const string_t&)");
+    static_assert(
+        is_detected_exact<bool, string_function_t, SAX, string_t>::value,
+        "Missing/invalid function: bool string(string_t&)");
+    static_assert(is_detected_exact<bool, start_object_function_t, SAX>::value,
+                  "Missing/invalid function: bool start_object(std::size_t)");
+    static_assert(is_detected_exact<bool, key_function_t, SAX, string_t>::value,
+                  "Missing/invalid function: bool key(string_t&)");
+    static_assert(is_detected_exact<bool, end_object_function_t, SAX>::value,
+                  "Missing/invalid function: bool end_object()");
+    static_assert(is_detected_exact<bool, start_array_function_t, SAX>::value,
+                  "Missing/invalid function: bool start_array(std::size_t)");
+    static_assert(is_detected_exact<bool, end_array_function_t, SAX>::value,
+                  "Missing/invalid function: bool end_array()");
+    static_assert(
+        is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value,
+        "Missing/invalid function: bool parse_error(std::size_t, const "
+        "std::string&, const exception&)");
+};
+}
+}
+
 // #include <nlohmann/detail/input/input_adapters.hpp>
 
+// #include <nlohmann/detail/input/json_sax.hpp>
+
+
+#include <cstddef>
+#include <string>
+#include <vector>
+
+// #include <nlohmann/detail/input/parser.hpp>
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+
+namespace nlohmann
+{
+
+/*!
+@brief SAX interface
+
+This class describes the SAX interface used by @ref nlohmann::json::sax_parse.
+Each function is called in different situations while the input is parsed. The
+boolean return value informs the parser whether to continue processing the
+input.
+*/
+template<typename BasicJsonType>
+struct json_sax
+{
+    /// type for (signed) integers
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    /// type for unsigned integers
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    /// type for floating-point numbers
+    using number_float_t = typename BasicJsonType::number_float_t;
+    /// type for strings
+    using string_t = typename BasicJsonType::string_t;
+
+    /*!
+    @brief a null value was read
+    @return whether parsing should proceed
+    */
+    virtual bool null() = 0;
+
+    /*!
+    @brief a boolean value was read
+    @param[in] val  boolean value
+    @return whether parsing should proceed
+    */
+    virtual bool boolean(bool val) = 0;
+
+    /*!
+    @brief an integer number was read
+    @param[in] val  integer value
+    @return whether parsing should proceed
+    */
+    virtual bool number_integer(number_integer_t val) = 0;
+
+    /*!
+    @brief an unsigned integer number was read
+    @param[in] val  unsigned integer value
+    @return whether parsing should proceed
+    */
+    virtual bool number_unsigned(number_unsigned_t val) = 0;
+
+    /*!
+    @brief an floating-point number was read
+    @param[in] val  floating-point value
+    @param[in] s    raw token value
+    @return whether parsing should proceed
+    */
+    virtual bool number_float(number_float_t val, const string_t& s) = 0;
+
+    /*!
+    @brief a string was read
+    @param[in] val  string value
+    @return whether parsing should proceed
+    @note It is safe to move the passed string.
+    */
+    virtual bool string(string_t& val) = 0;
+
+    /*!
+    @brief the beginning of an object was read
+    @param[in] elements  number of object elements or -1 if unknown
+    @return whether parsing should proceed
+    @note binary formats may report the number of elements
+    */
+    virtual bool start_object(std::size_t elements) = 0;
+
+    /*!
+    @brief an object key was read
+    @param[in] val  object key
+    @return whether parsing should proceed
+    @note It is safe to move the passed string.
+    */
+    virtual bool key(string_t& val) = 0;
+
+    /*!
+    @brief the end of an object was read
+    @return whether parsing should proceed
+    */
+    virtual bool end_object() = 0;
+
+    /*!
+    @brief the beginning of an array was read
+    @param[in] elements  number of array elements or -1 if unknown
+    @return whether parsing should proceed
+    @note binary formats may report the number of elements
+    */
+    virtual bool start_array(std::size_t elements) = 0;
+
+    /*!
+    @brief the end of an array was read
+    @return whether parsing should proceed
+    */
+    virtual bool end_array() = 0;
+
+    /*!
+    @brief a parse error occurred
+    @param[in] position    the position in the input where the error occurs
+    @param[in] last_token  the last read token
+    @param[in] error_msg   a detailed error message
+    @return whether parsing should proceed (must return false)
+    */
+    virtual bool parse_error(std::size_t position,
+                             const std::string& last_token,
+                             const detail::exception& ex) = 0;
+
+    virtual ~json_sax() = default;
+};
+
+
+namespace detail
+{
+/*!
+@brief SAX implementation to create a JSON value from SAX events
+
+This class implements the @ref json_sax interface and processes the SAX events
+to create a JSON value which makes it basically a DOM parser. The structure or
+hierarchy of the JSON value is managed by the stack `ref_stack` which contains
+a pointer to the respective array or object for each recursion depth.
+
+After successful parsing, the value that is passed by reference to the
+constructor contains the parsed value.
+
+@tparam BasicJsonType  the JSON type
+*/
+template<typename BasicJsonType>
+class json_sax_dom_parser
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+
+    /*!
+    @param[in, out] r  reference to a JSON value that is manipulated while
+                       parsing
+    @param[in] allow_exceptions_  whether parse errors yield exceptions
+    */
+    explicit json_sax_dom_parser(BasicJsonType& r, const bool allow_exceptions_ = true)
+        : root(r), allow_exceptions(allow_exceptions_)
+    {}
+
+    bool null()
+    {
+        handle_value(nullptr);
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_integer(number_integer_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t&)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool string(string_t& val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool start_object(std::size_t len)
+    {
+        ref_stack.push_back(handle_value(BasicJsonType::value_t::object));
+
+        if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408,
+                                            "excessive object size: " + std::to_string(len)));
+        }
+
+        return true;
+    }
+
+    bool key(string_t& val)
+    {
+        // add null at given key and store the reference for later
+        object_element = &(ref_stack.back()->m_value.object->operator[](val));
+        return true;
+    }
+
+    bool end_object()
+    {
+        ref_stack.pop_back();
+        return true;
+    }
+
+    bool start_array(std::size_t len)
+    {
+        ref_stack.push_back(handle_value(BasicJsonType::value_t::array));
+
+        if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+        {
+            JSON_THROW(out_of_range::create(408,
+                                            "excessive array size: " + std::to_string(len)));
+        }
+
+        return true;
+    }
+
+    bool end_array()
+    {
+        ref_stack.pop_back();
+        return true;
+    }
+
+    bool parse_error(std::size_t, const std::string&,
+                     const detail::exception& ex)
+    {
+        errored = true;
+        if (allow_exceptions)
+        {
+            // determine the proper exception type from the id
+            switch ((ex.id / 100) % 100)
+            {
+                case 1:
+                    JSON_THROW(*reinterpret_cast<const detail::parse_error*>(&ex));
+                case 4:
+                    JSON_THROW(*reinterpret_cast<const detail::out_of_range*>(&ex));
+                // LCOV_EXCL_START
+                case 2:
+                    JSON_THROW(*reinterpret_cast<const detail::invalid_iterator*>(&ex));
+                case 3:
+                    JSON_THROW(*reinterpret_cast<const detail::type_error*>(&ex));
+                case 5:
+                    JSON_THROW(*reinterpret_cast<const detail::other_error*>(&ex));
+                default:
+                    assert(false);
+                    // LCOV_EXCL_STOP
+            }
+        }
+        return false;
+    }
+
+    constexpr bool is_errored() const
+    {
+        return errored;
+    }
+
+  private:
+    /*!
+    @invariant If the ref stack is empty, then the passed value will be the new
+               root.
+    @invariant If the ref stack contains a value, then it is an array or an
+               object to which we can add elements
+    */
+    template<typename Value>
+    BasicJsonType* handle_value(Value&& v)
+    {
+        if (ref_stack.empty())
+        {
+            root = BasicJsonType(std::forward<Value>(v));
+            return &root;
+        }
+        else
+        {
+            assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
+            if (ref_stack.back()->is_array())
+            {
+                ref_stack.back()->m_value.array->emplace_back(std::forward<Value>(v));
+                return &(ref_stack.back()->m_value.array->back());
+            }
+            else
+            {
+                assert(object_element);
+                *object_element = BasicJsonType(std::forward<Value>(v));
+                return object_element;
+            }
+        }
+    }
+
+    /// the parsed JSON value
+    BasicJsonType& root;
+    /// stack to model hierarchy of values
+    std::vector<BasicJsonType*> ref_stack;
+    /// helper to hold the reference for the next object element
+    BasicJsonType* object_element = nullptr;
+    /// whether a syntax error occurred
+    bool errored = false;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+};
+
+template<typename BasicJsonType>
+class json_sax_dom_callback_parser
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+    using parser_callback_t = typename BasicJsonType::parser_callback_t;
+    using parse_event_t = typename BasicJsonType::parse_event_t;
+
+    json_sax_dom_callback_parser(BasicJsonType& r,
+                                 const parser_callback_t cb,
+                                 const bool allow_exceptions_ = true)
+        : root(r), callback(cb), allow_exceptions(allow_exceptions_)
+    {
+        keep_stack.push_back(true);
+    }
+
+    bool null()
+    {
+        handle_value(nullptr);
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_integer(number_integer_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool number_float(number_float_t val, const string_t&)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool string(string_t& val)
+    {
+        handle_value(val);
+        return true;
+    }
+
+    bool start_object(std::size_t len)
+    {
+        // check callback for object start
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::object_start, discarded);
+        keep_stack.push_back(keep);
+
+        auto val = handle_value(BasicJsonType::value_t::object, true);
+        ref_stack.push_back(val.second);
+
+        // check object limit
+        if (ref_stack.back())
+        {
+            if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+            {
+                JSON_THROW(out_of_range::create(408,
+                                                "excessive object size: " + std::to_string(len)));
+            }
+        }
+
+        return true;
+    }
+
+    bool key(string_t& val)
+    {
+        BasicJsonType k = BasicJsonType(val);
+
+        // check callback for key
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::key, k);
+        key_keep_stack.push_back(keep);
+
+        // add discarded value at given key and store the reference for later
+        if (keep and ref_stack.back())
+        {
+            object_element = &(ref_stack.back()->m_value.object->operator[](val) = discarded);
+        }
+
+        return true;
+    }
+
+    bool end_object()
+    {
+        if (ref_stack.back())
+        {
+            if (not callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::object_end, *ref_stack.back()))
+            {
+                // discard object
+                *ref_stack.back() = discarded;
+            }
+        }
+
+        assert(not ref_stack.empty());
+        assert(not keep_stack.empty());
+        ref_stack.pop_back();
+        keep_stack.pop_back();
+
+        if (not ref_stack.empty() and ref_stack.back())
+        {
+            // remove discarded value
+            if (ref_stack.back()->is_object())
+            {
+                for (auto it = ref_stack.back()->begin(); it != ref_stack.back()->end(); ++it)
+                {
+                    if (it->is_discarded())
+                    {
+                        ref_stack.back()->erase(it);
+                        break;
+                    }
+                }
+            }
+        }
+
+        return true;
+    }
+
+    bool start_array(std::size_t len)
+    {
+        const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::array_start, discarded);
+        keep_stack.push_back(keep);
+
+        auto val = handle_value(BasicJsonType::value_t::array, true);
+        ref_stack.push_back(val.second);
+
+        // check array limit
+        if (ref_stack.back())
+        {
+            if (JSON_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+            {
+                JSON_THROW(out_of_range::create(408,
+                                                "excessive array size: " + std::to_string(len)));
+            }
+        }
+
+        return true;
+    }
+
+    bool end_array()
+    {
+        bool keep = true;
+
+        if (ref_stack.back())
+        {
+            keep = callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::array_end, *ref_stack.back());
+            if (not keep)
+            {
+                // discard array
+                *ref_stack.back() = discarded;
+            }
+        }
+
+        assert(not ref_stack.empty());
+        assert(not keep_stack.empty());
+        ref_stack.pop_back();
+        keep_stack.pop_back();
+
+        // remove discarded value
+        if (not keep and not ref_stack.empty())
+        {
+            if (ref_stack.back()->is_array())
+            {
+                ref_stack.back()->m_value.array->pop_back();
+            }
+        }
+
+        return true;
+    }
+
+    bool parse_error(std::size_t, const std::string&,
+                     const detail::exception& ex)
+    {
+        errored = true;
+        if (allow_exceptions)
+        {
+            // determine the proper exception type from the id
+            switch ((ex.id / 100) % 100)
+            {
+                case 1:
+                    JSON_THROW(*reinterpret_cast<const detail::parse_error*>(&ex));
+                case 4:
+                    JSON_THROW(*reinterpret_cast<const detail::out_of_range*>(&ex));
+                // LCOV_EXCL_START
+                case 2:
+                    JSON_THROW(*reinterpret_cast<const detail::invalid_iterator*>(&ex));
+                case 3:
+                    JSON_THROW(*reinterpret_cast<const detail::type_error*>(&ex));
+                case 5:
+                    JSON_THROW(*reinterpret_cast<const detail::other_error*>(&ex));
+                default:
+                    assert(false);
+                    // LCOV_EXCL_STOP
+            }
+        }
+        return false;
+    }
+
+    constexpr bool is_errored() const
+    {
+        return errored;
+    }
+
+  private:
+    /*!
+    @param[in] v  value to add to the JSON value we build during parsing
+    @param[in] skip_callback  whether we should skip calling the callback
+               function; this is required after start_array() and
+               start_object() SAX events, because otherwise we would call the
+               callback function with an empty array or object, respectively.
+
+    @invariant If the ref stack is empty, then the passed value will be the new
+               root.
+    @invariant If the ref stack contains a value, then it is an array or an
+               object to which we can add elements
+
+    @return pair of boolean (whether value should be kept) and pointer (to the
+            passed value in the ref_stack hierarchy; nullptr if not kept)
+    */
+    template<typename Value>
+    std::pair<bool, BasicJsonType*> handle_value(Value&& v, const bool skip_callback = false)
+    {
+        assert(not keep_stack.empty());
+
+        // do not handle this value if we know it would be added to a discarded
+        // container
+        if (not keep_stack.back())
+        {
+            return {false, nullptr};
+        }
+
+        // create value
+        auto value = BasicJsonType(std::forward<Value>(v));
+
+        // check callback
+        const bool keep = skip_callback or callback(static_cast<int>(ref_stack.size()), parse_event_t::value, value);
+
+        // do not handle this value if we just learnt it shall be discarded
+        if (not keep)
+        {
+            return {false, nullptr};
+        }
+
+        if (ref_stack.empty())
+        {
+            root = std::move(value);
+            return {true, &root};
+        }
+        else
+        {
+            // skip this value if we already decided to skip the parent
+            // (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)
+            if (not ref_stack.back())
+            {
+                return {false, nullptr};
+            }
+
+            assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
+            if (ref_stack.back()->is_array())
+            {
+                ref_stack.back()->m_value.array->push_back(std::move(value));
+                return {true, &(ref_stack.back()->m_value.array->back())};
+            }
+            else
+            {
+                // check if we should store an element for the current key
+                assert(not key_keep_stack.empty());
+                const bool store_element = key_keep_stack.back();
+                key_keep_stack.pop_back();
+
+                if (not store_element)
+                {
+                    return {false, nullptr};
+                }
+
+                assert(object_element);
+                *object_element = std::move(value);
+                return {true, object_element};
+            }
+        }
+    }
+
+    /// the parsed JSON value
+    BasicJsonType& root;
+    /// stack to model hierarchy of values
+    std::vector<BasicJsonType*> ref_stack;
+    /// stack to manage which values to keep
+    std::vector<bool> keep_stack;
+    /// stack to manage which object keys to keep
+    std::vector<bool> key_keep_stack;
+    /// helper to hold the reference for the next object element
+    BasicJsonType* object_element = nullptr;
+    /// whether a syntax error occurred
+    bool errored = false;
+    /// callback function
+    const parser_callback_t callback = nullptr;
+    /// whether to throw exceptions in case of errors
+    const bool allow_exceptions = true;
+    /// a discarded value for the callback
+    BasicJsonType discarded = BasicJsonType::value_t::discarded;
+};
+
+template<typename BasicJsonType>
+class json_sax_acceptor
+{
+  public:
+    using number_integer_t = typename BasicJsonType::number_integer_t;
+    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
+    using string_t = typename BasicJsonType::string_t;
+
+    bool null()
+    {
+        return true;
+    }
+
+    bool boolean(bool)
+    {
+        return true;
+    }
+
+    bool number_integer(number_integer_t)
+    {
+        return true;
+    }
+
+    bool number_unsigned(number_unsigned_t)
+    {
+        return true;
+    }
+
+    bool number_float(number_float_t, const string_t&)
+    {
+        return true;
+    }
+
+    bool string(string_t&)
+    {
+        return true;
+    }
+
+    bool start_object(std::size_t = std::size_t(-1))
+    {
+        return true;
+    }
+
+    bool key(string_t&)
+    {
+        return true;
+    }
+
+    bool end_object()
+    {
+        return true;
+    }
+
+    bool start_array(std::size_t = std::size_t(-1))
+    {
+        return true;
+    }
+
+    bool end_array()
+    {
+        return true;
+    }
+
+    bool parse_error(std::size_t, const std::string&, const detail::exception&)
+    {
+        return false;
+    }
+};
+}
+
+}
+
 // #include <nlohmann/detail/input/lexer.hpp>
 
 // #include <nlohmann/detail/value_t.hpp>
@@ -3181,11 +4530,14 @@ class parser
         std::function<bool(int depth, parse_event_t event, BasicJsonType& parsed)>;
 
     /// a parser reading from an input adapter
-    explicit parser(detail::input_adapter_t adapter,
+    explicit parser(detail::input_adapter_t&& adapter,
                     const parser_callback_t cb = nullptr,
                     const bool allow_exceptions_ = true)
-        : callback(cb), m_lexer(adapter), allow_exceptions(allow_exceptions_)
-    {}
+        : callback(cb), m_lexer(std::move(adapter)), allow_exceptions(allow_exceptions_)
+    {
+        // read first token
+        get_token();
+    }
 
     /*!
     @brief public parser interface
@@ -3199,31 +4551,54 @@ class parser
     */
     void parse(const bool strict, BasicJsonType& result)
     {
-        // read first token
-        get_token();
-
-        parse_internal(true, result);
-        result.assert_invariant();
-
-        // in strict mode, input must be completely read
-        if (strict)
+        if (callback)
         {
-            get_token();
-            expect(token_type::end_of_input);
+            json_sax_dom_callback_parser<BasicJsonType> sdp(result, callback, allow_exceptions);
+            sax_parse_internal(&sdp);
+            result.assert_invariant();
+
+            // in strict mode, input must be completely read
+            if (strict and (get_token() != token_type::end_of_input))
+            {
+                sdp.parse_error(m_lexer.get_position(),
+                                m_lexer.get_token_string(),
+                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input)));
+            }
+
+            // in case of an error, return discarded value
+            if (sdp.is_errored())
+            {
+                result = value_t::discarded;
+                return;
+            }
+
+            // set top-level value to null if it was discarded by the callback
+            // function
+            if (result.is_discarded())
+            {
+                result = nullptr;
+            }
         }
-
-        // in case of an error, return discarded value
-        if (errored)
+        else
         {
-            result = value_t::discarded;
-            return;
-        }
+            json_sax_dom_parser<BasicJsonType> sdp(result, allow_exceptions);
+            sax_parse_internal(&sdp);
+            result.assert_invariant();
 
-        // set top-level value to null if it was discarded by the callback
-        // function
-        if (result.is_discarded())
-        {
-            result = nullptr;
+            // in strict mode, input must be completely read
+            if (strict and (get_token() != token_type::end_of_input))
+            {
+                sdp.parse_error(m_lexer.get_position(),
+                                m_lexer.get_token_string(),
+                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input)));
+            }
+
+            // in case of an error, return discarded value
+            if (sdp.is_errored())
+            {
+                result = value_t::discarded;
+                return;
+            }
         }
     }
 
@@ -3235,414 +4610,311 @@ class parser
     */
     bool accept(const bool strict = true)
     {
-        // read first token
-        get_token();
+        json_sax_acceptor<BasicJsonType> sax_acceptor;
+        return sax_parse(&sax_acceptor, strict);
+    }
 
-        if (not accept_internal())
+    template <typename SAX>
+    bool sax_parse(SAX* sax, const bool strict = true)
+    {
+        (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
+        const bool result = sax_parse_internal(sax);
+
+        // strict mode: next byte must be EOF
+        if (result and strict and (get_token() != token_type::end_of_input))
         {
-            return false;
+            return sax->parse_error(m_lexer.get_position(),
+                                    m_lexer.get_token_string(),
+                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_of_input)));
         }
 
-        // strict => last token must be EOF
-        return not strict or (get_token() == token_type::end_of_input);
+        return result;
     }
 
   private:
-    /*!
-    @brief the actual parser
-    @throw parse_error.101 in case of an unexpected token
-    @throw parse_error.102 if to_unicode fails or surrogate error
-    @throw parse_error.103 if to_unicode fails
-    */
-    void parse_internal(bool keep, BasicJsonType& result)
+    template <typename SAX>
+    bool sax_parse_internal(SAX* sax)
     {
-        // never parse after a parse error was detected
-        assert(not errored);
+        // stack to remember the hieararchy of structured values we are parsing
+        // true = array; false = object
+        std::vector<bool> states;
+        // value to avoid a goto (see comment where set to true)
+        bool skip_to_state_evaluation = false;
 
-        // start with a discarded value
-        if (not result.is_discarded())
+        while (true)
         {
-            result.m_value.destroy(result.m_type);
-            result.m_type = value_t::discarded;
-        }
-
-        switch (last_token)
-        {
-            case token_type::begin_object:
+            if (not skip_to_state_evaluation)
             {
-                if (keep)
+                // invariant: get_token() was called before each iteration
+                switch (last_token)
                 {
-                    if (callback)
+                    case token_type::begin_object:
                     {
-                        keep = callback(depth++, parse_event_t::object_start, result);
-                    }
-
-                    if (not callback or keep)
-                    {
-                        // explicitly set result to object to cope with {}
-                        result.m_type = value_t::object;
-                        result.m_value = value_t::object;
-                    }
-                }
-
-                // read next token
-                get_token();
-
-                // closing } -> we are done
-                if (last_token == token_type::end_object)
-                {
-                    if (keep and callback and not callback(--depth, parse_event_t::object_end, result))
-                    {
-                        result.m_value.destroy(result.m_type);
-                        result.m_type = value_t::discarded;
-                    }
-                    break;
-                }
-
-                // parse values
-                string_t key;
-                BasicJsonType value;
-                while (true)
-                {
-                    // store key
-                    if (not expect(token_type::value_string))
-                    {
-                        return;
-                    }
-                    key = m_lexer.move_string();
-
-                    bool keep_tag = false;
-                    if (keep)
-                    {
-                        if (callback)
+                        if (JSON_UNLIKELY(not sax->start_object(std::size_t(-1))))
                         {
-                            BasicJsonType k(key);
-                            keep_tag = callback(depth, parse_event_t::key, k);
+                            return false;
+                        }
+
+                        // closing } -> we are done
+                        if (get_token() == token_type::end_object)
+                        {
+                            if (JSON_UNLIKELY(not sax->end_object()))
+                            {
+                                return false;
+                            }
+                            break;
+                        }
+
+                        // parse key
+                        if (JSON_UNLIKELY(last_token != token_type::value_string))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::value_string)));
                         }
                         else
                         {
-                            keep_tag = true;
+                            if (JSON_UNLIKELY(not sax->key(m_lexer.get_string())))
+                            {
+                                return false;
+                            }
+                        }
+
+                        // parse separator (:)
+                        if (JSON_UNLIKELY(get_token() != token_type::name_separator))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::name_separator)));
+                        }
+
+                        // remember we are now inside an object
+                        states.push_back(false);
+
+                        // parse values
+                        get_token();
+                        continue;
+                    }
+
+                    case token_type::begin_array:
+                    {
+                        if (JSON_UNLIKELY(not sax->start_array(std::size_t(-1))))
+                        {
+                            return false;
+                        }
+
+                        // closing ] -> we are done
+                        if (get_token() == token_type::end_array)
+                        {
+                            if (JSON_UNLIKELY(not sax->end_array()))
+                            {
+                                return false;
+                            }
+                            break;
+                        }
+
+                        // remember we are now inside an array
+                        states.push_back(true);
+
+                        // parse values (no need to call get_token)
+                        continue;
+                    }
+
+                    case token_type::value_float:
+                    {
+                        const auto res = m_lexer.get_number_float();
+
+                        if (JSON_UNLIKELY(not std::isfinite(res)))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    out_of_range::create(406, "number overflow parsing '" + m_lexer.get_token_string() + "'"));
+                        }
+                        else
+                        {
+                            if (JSON_UNLIKELY(not sax->number_float(res, m_lexer.get_string())))
+                            {
+                                return false;
+                            }
+                            break;
                         }
                     }
 
-                    // parse separator (:)
-                    get_token();
-                    if (not expect(token_type::name_separator))
+                    case token_type::literal_false:
                     {
-                        return;
+                        if (JSON_UNLIKELY(not sax->boolean(false)))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    // parse and add value
-                    get_token();
-                    value.m_value.destroy(value.m_type);
-                    value.m_type = value_t::discarded;
-                    parse_internal(keep, value);
-
-                    if (JSON_UNLIKELY(errored))
+                    case token_type::literal_null:
                     {
-                        return;
+                        if (JSON_UNLIKELY(not sax->null()))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    if (keep and keep_tag and not value.is_discarded())
+                    case token_type::literal_true:
                     {
-                        result.m_value.object->emplace(std::move(key), std::move(value));
+                        if (JSON_UNLIKELY(not sax->boolean(true)))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
+                    case token_type::value_integer:
                     {
-                        get_token();
-                        continue;
+                        if (JSON_UNLIKELY(not sax->number_integer(m_lexer.get_number_integer())))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    // closing }
-                    if (not expect(token_type::end_object))
+                    case token_type::value_string:
                     {
-                        return;
-                    }
-                    break;
-                }
-
-                if (keep and callback and not callback(--depth, parse_event_t::object_end, result))
-                {
-                    result.m_value.destroy(result.m_type);
-                    result.m_type = value_t::discarded;
-                }
-                break;
-            }
-
-            case token_type::begin_array:
-            {
-                if (keep)
-                {
-                    if (callback)
-                    {
-                        keep = callback(depth++, parse_event_t::array_start, result);
+                        if (JSON_UNLIKELY(not sax->string(m_lexer.get_string())))
+                        {
+                            return false;
+                        }
+                        break;
                     }
 
-                    if (not callback or keep)
+                    case token_type::value_unsigned:
                     {
-                        // explicitly set result to array to cope with []
-                        result.m_type = value_t::array;
-                        result.m_value = value_t::array;
+                        if (JSON_UNLIKELY(not sax->number_unsigned(m_lexer.get_number_unsigned())))
+                        {
+                            return false;
+                        }
+                        break;
+                    }
+
+                    case token_type::parse_error:
+                    {
+                        // using "uninitialized" to avoid "expected" message
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::uninitialized)));
+                    }
+
+                    default: // the last token was unexpected
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::literal_or_value)));
                     }
                 }
-
-                // read next token
-                get_token();
-
-                // closing ] -> we are done
-                if (last_token == token_type::end_array)
-                {
-                    if (callback and not callback(--depth, parse_event_t::array_end, result))
-                    {
-                        result.m_value.destroy(result.m_type);
-                        result.m_type = value_t::discarded;
-                    }
-                    break;
-                }
-
-                // parse values
-                BasicJsonType value;
-                while (true)
-                {
-                    // parse value
-                    value.m_value.destroy(value.m_type);
-                    value.m_type = value_t::discarded;
-                    parse_internal(keep, value);
-
-                    if (JSON_UNLIKELY(errored))
-                    {
-                        return;
-                    }
-
-                    if (keep and not value.is_discarded())
-                    {
-                        result.m_value.array->push_back(std::move(value));
-                    }
-
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
-                    {
-                        get_token();
-                        continue;
-                    }
-
-                    // closing ]
-                    if (not expect(token_type::end_array))
-                    {
-                        return;
-                    }
-                    break;
-                }
-
-                if (keep and callback and not callback(--depth, parse_event_t::array_end, result))
-                {
-                    result.m_value.destroy(result.m_type);
-                    result.m_type = value_t::discarded;
-                }
-                break;
             }
-
-            case token_type::literal_null:
+            else
             {
-                result.m_type = value_t::null;
-                break;
+                skip_to_state_evaluation = false;
             }
 
-            case token_type::value_string:
+            // we reached this line after we successfully parsed a value
+            if (states.empty())
             {
-                result.m_type = value_t::string;
-                result.m_value = m_lexer.move_string();
-                break;
-            }
-
-            case token_type::literal_true:
-            {
-                result.m_type = value_t::boolean;
-                result.m_value = true;
-                break;
-            }
-
-            case token_type::literal_false:
-            {
-                result.m_type = value_t::boolean;
-                result.m_value = false;
-                break;
-            }
-
-            case token_type::value_unsigned:
-            {
-                result.m_type = value_t::number_unsigned;
-                result.m_value = m_lexer.get_number_unsigned();
-                break;
-            }
-
-            case token_type::value_integer:
-            {
-                result.m_type = value_t::number_integer;
-                result.m_value = m_lexer.get_number_integer();
-                break;
-            }
-
-            case token_type::value_float:
-            {
-                result.m_type = value_t::number_float;
-                result.m_value = m_lexer.get_number_float();
-
-                // throw in case of infinity or NAN
-                if (JSON_UNLIKELY(not std::isfinite(result.m_value.number_float)))
-                {
-                    if (allow_exceptions)
-                    {
-                        JSON_THROW(out_of_range::create(406, "number overflow parsing '" +
-                                                        m_lexer.get_token_string() + "'"));
-                    }
-                    expect(token_type::uninitialized);
-                }
-                break;
-            }
-
-            case token_type::parse_error:
-            {
-                // using "uninitialized" to avoid "expected" message
-                if (not expect(token_type::uninitialized))
-                {
-                    return;
-                }
-                break; // LCOV_EXCL_LINE
-            }
-
-            default:
-            {
-                // the last token was unexpected; we expected a value
-                if (not expect(token_type::literal_or_value))
-                {
-                    return;
-                }
-                break; // LCOV_EXCL_LINE
-            }
-        }
-
-        if (keep and callback and not callback(depth, parse_event_t::value, result))
-        {
-            result.m_value.destroy(result.m_type);
-            result.m_type = value_t::discarded;
-        }
-    }
-
-    /*!
-    @brief the actual acceptor
-
-    @invariant 1. The last token is not yet processed. Therefore, the caller
-                  of this function must make sure a token has been read.
-               2. When this function returns, the last token is processed.
-                  That is, the last read character was already considered.
-
-    This invariant makes sure that no token needs to be "unput".
-    */
-    bool accept_internal()
-    {
-        switch (last_token)
-        {
-            case token_type::begin_object:
-            {
-                // read next token
-                get_token();
-
-                // closing } -> we are done
-                if (last_token == token_type::end_object)
-                {
-                    return true;
-                }
-
-                // parse values
-                while (true)
-                {
-                    // parse key
-                    if (last_token != token_type::value_string)
-                    {
-                        return false;
-                    }
-
-                    // parse separator (:)
-                    get_token();
-                    if (last_token != token_type::name_separator)
-                    {
-                        return false;
-                    }
-
-                    // parse value
-                    get_token();
-                    if (not accept_internal())
-                    {
-                        return false;
-                    }
-
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
-                    {
-                        get_token();
-                        continue;
-                    }
-
-                    // closing }
-                    return (last_token == token_type::end_object);
-                }
-            }
-
-            case token_type::begin_array:
-            {
-                // read next token
-                get_token();
-
-                // closing ] -> we are done
-                if (last_token == token_type::end_array)
-                {
-                    return true;
-                }
-
-                // parse values
-                while (true)
-                {
-                    // parse value
-                    if (not accept_internal())
-                    {
-                        return false;
-                    }
-
-                    // comma -> next value
-                    get_token();
-                    if (last_token == token_type::value_separator)
-                    {
-                        get_token();
-                        continue;
-                    }
-
-                    // closing ]
-                    return (last_token == token_type::end_array);
-                }
-            }
-
-            case token_type::value_float:
-            {
-                // reject infinity or NAN
-                return std::isfinite(m_lexer.get_number_float());
-            }
-
-            case token_type::literal_false:
-            case token_type::literal_null:
-            case token_type::literal_true:
-            case token_type::value_integer:
-            case token_type::value_string:
-            case token_type::value_unsigned:
+                // empty stack: we reached the end of the hieararchy: done
                 return true;
+            }
+            else
+            {
+                if (states.back())  // array
+                {
+                    // comma -> next value
+                    if (get_token() == token_type::value_separator)
+                    {
+                        // parse a new value
+                        get_token();
+                        continue;
+                    }
 
-            default: // the last token was unexpected
-                return false;
+                    // closing ]
+                    if (JSON_LIKELY(last_token == token_type::end_array))
+                    {
+                        if (JSON_UNLIKELY(not sax->end_array()))
+                        {
+                            return false;
+                        }
+
+                        // We are done with this array. Before we can parse a
+                        // new value, we need to evaluate the new state first.
+                        // By setting skip_to_state_evaluation to false, we
+                        // are effectively jumping to the beginning of this if.
+                        assert(not states.empty());
+                        states.pop_back();
+                        skip_to_state_evaluation = true;
+                        continue;
+                    }
+                    else
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_array)));
+                    }
+                }
+                else  // object
+                {
+                    // comma -> next value
+                    if (get_token() == token_type::value_separator)
+                    {
+                        // parse key
+                        if (JSON_UNLIKELY(get_token() != token_type::value_string))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::value_string)));
+                        }
+                        else
+                        {
+                            if (JSON_UNLIKELY(not sax->key(m_lexer.get_string())))
+                            {
+                                return false;
+                            }
+                        }
+
+                        // parse separator (:)
+                        if (JSON_UNLIKELY(get_token() != token_type::name_separator))
+                        {
+                            return sax->parse_error(m_lexer.get_position(),
+                                                    m_lexer.get_token_string(),
+                                                    parse_error::create(101, m_lexer.get_position(), exception_message(token_type::name_separator)));
+                        }
+
+                        // parse values
+                        get_token();
+                        continue;
+                    }
+
+                    // closing }
+                    if (JSON_LIKELY(last_token == token_type::end_object))
+                    {
+                        if (JSON_UNLIKELY(not sax->end_object()))
+                        {
+                            return false;
+                        }
+
+                        // We are done with this object. Before we can parse a
+                        // new value, we need to evaluate the new state first.
+                        // By setting skip_to_state_evaluation to false, we
+                        // are effectively jumping to the beginning of this if.
+                        assert(not states.empty());
+                        states.pop_back();
+                        skip_to_state_evaluation = true;
+                        continue;
+                    }
+                    else
+                    {
+                        return sax->parse_error(m_lexer.get_position(),
+                                                m_lexer.get_token_string(),
+                                                parse_error::create(101, m_lexer.get_position(), exception_message(token_type::end_object)));
+                    }
+                }
+            }
         }
     }
 
@@ -3652,29 +4924,7 @@ class parser
         return (last_token = m_lexer.scan());
     }
 
-    /*!
-    @throw parse_error.101 if expected token did not occur
-    */
-    bool expect(token_type t)
-    {
-        if (JSON_UNLIKELY(t != last_token))
-        {
-            errored = true;
-            expected = t;
-            if (allow_exceptions)
-            {
-                throw_exception();
-            }
-            else
-            {
-                return false;
-            }
-        }
-
-        return true;
-    }
-
-    [[noreturn]] void throw_exception() const
+    std::string exception_message(const token_type expected)
     {
         std::string error_msg = "syntax error - ";
         if (last_token == token_type::parse_error)
@@ -3692,22 +4942,16 @@ class parser
             error_msg += "; expected " + std::string(lexer_t::token_type_name(expected));
         }
 
-        JSON_THROW(parse_error::create(101, m_lexer.get_position(), error_msg));
+        return error_msg;
     }
 
   private:
-    /// current level of recursion
-    int depth = 0;
     /// callback function
     const parser_callback_t callback = nullptr;
     /// the type of the last read token
     token_type last_token = token_type::uninitialized;
     /// the lexer
     lexer_t m_lexer;
-    /// whether a syntax error occurred
-    bool errored = false;
-    /// possible reason for the syntax error
-    token_type expected = token_type::uninitialized;
     /// whether to throw exceptions in case of errors
     const bool allow_exceptions = true;
 };
@@ -3804,7 +5048,7 @@ class primitive_iterator_t
     primitive_iterator_t const operator++(int) noexcept
     {
         auto result = *this;
-        m_it++;
+        ++m_it;
         return result;
     }
 
@@ -3817,7 +5061,7 @@ class primitive_iterator_t
     primitive_iterator_t const operator--(int) noexcept
     {
         auto result = *this;
-        m_it--;
+        --m_it;
         return result;
     }
 
@@ -3879,7 +5123,7 @@ template<typename BasicJsonType> struct internal_iterator
 
 // #include <nlohmann/detail/macro_scope.hpp>
 
-// #include <nlohmann/detail/meta.hpp>
+// #include <nlohmann/detail/meta/cpp_future.hpp>
 
 // #include <nlohmann/detail/value_t.hpp>
 
@@ -3904,7 +5148,7 @@ This class implements a both iterators (iterator and const_iterator) for the
 
 @requirement The class satisfies the following concept requirements:
 -
-[BidirectionalIterator](http://en.cppreference.com/w/cpp/concept/BidirectionalIterator):
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
   The iterator that can be moved can be moved in both directions (i.e.
   incremented and decremented).
 
@@ -4456,7 +5700,7 @@ class iter_impl
     @brief  return the key of an object iterator
     @pre The iterator is initialized; i.e. `m_object != nullptr`.
     */
-    typename object_t::key_type key() const
+    const typename object_t::key_type& key() const
     {
         assert(m_object != nullptr);
 
@@ -4488,105 +5732,6 @@ class iter_impl
 
 // #include <nlohmann/detail/iterators/iteration_proxy.hpp>
 
-
-#include <cstddef> // size_t
-#include <string> // string, to_string
-
-// #include <nlohmann/detail/value_t.hpp>
-
-
-namespace nlohmann
-{
-namespace detail
-{
-/// proxy class for the items() function
-template<typename IteratorType> class iteration_proxy
-{
-  private:
-    /// helper class for iteration
-    class iteration_proxy_internal
-    {
-      private:
-        /// the iterator
-        IteratorType anchor;
-        /// an index for arrays (used to create key names)
-        std::size_t array_index = 0;
-
-      public:
-        explicit iteration_proxy_internal(IteratorType it) noexcept : anchor(it) {}
-
-        /// dereference operator (needed for range-based for)
-        iteration_proxy_internal& operator*()
-        {
-            return *this;
-        }
-
-        /// increment operator (needed for range-based for)
-        iteration_proxy_internal& operator++()
-        {
-            ++anchor;
-            ++array_index;
-
-            return *this;
-        }
-
-        /// inequality operator (needed for range-based for)
-        bool operator!=(const iteration_proxy_internal& o) const noexcept
-        {
-            return anchor != o.anchor;
-        }
-
-        /// return key of the iterator
-        std::string key() const
-        {
-            assert(anchor.m_object != nullptr);
-
-            switch (anchor.m_object->type())
-            {
-                // use integer array index as key
-                case value_t::array:
-                    return std::to_string(array_index);
-
-                // use key from the object
-                case value_t::object:
-                    return anchor.key();
-
-                // use an empty key for all primitive types
-                default:
-                    return "";
-            }
-        }
-
-        /// return value of the iterator
-        typename IteratorType::reference value() const
-        {
-            return anchor.value();
-        }
-    };
-
-    /// the container to iterate
-    typename IteratorType::reference container;
-
-  public:
-    /// construct iteration proxy from a container
-    explicit iteration_proxy(typename IteratorType::reference cont) noexcept
-        : container(cont) {}
-
-    /// return iterator begin (needed for range-based for)
-    iteration_proxy_internal begin() noexcept
-    {
-        return iteration_proxy_internal(container.begin());
-    }
-
-    /// return iterator end (needed for range-based for)
-    iteration_proxy_internal end() noexcept
-    {
-        return iteration_proxy_internal(container.end());
-    }
-};
-}
-}
-
 // #include <nlohmann/detail/iterators/json_reverse_iterator.hpp>
 
 
@@ -4611,10 +5756,10 @@ create @ref const_reverse_iterator).
 
 @requirement The class satisfies the following concept requirements:
 -
-[BidirectionalIterator](http://en.cppreference.com/w/cpp/concept/BidirectionalIterator):
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
   The iterator that can be moved can be moved in both directions (i.e.
   incremented and decremented).
-- [OutputIterator](http://en.cppreference.com/w/cpp/concept/OutputIterator):
+- [OutputIterator](https://en.cppreference.com/w/cpp/named_req/OutputIterator):
   It is possible to write to the pointed-to element (only if @a Base is
   @ref iterator).
 
@@ -4631,11 +5776,11 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
     using reference = typename Base::reference;
 
     /// create reverse iterator from iterator
-    json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
+    explicit json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
         : base_iterator(it) {}
 
     /// create reverse iterator from base class
-    json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
+    explicit json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
 
     /// post-increment (it++)
     json_reverse_iterator const operator++(int)
@@ -4832,21 +5977,23 @@ class output_adapter
 #include <cmath> // ldexp
 #include <cstddef> // size_t
 #include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
+#include <cstdio> // snprintf
 #include <cstring> // memcpy
-#include <iomanip> // setw, setfill
-#include <ios> // hex
 #include <iterator> // back_inserter
 #include <limits> // numeric_limits
-#include <sstream> // stringstream
 #include <string> // char_traits, string
 #include <utility> // make_pair, move
 
 // #include <nlohmann/detail/input/input_adapters.hpp>
 
+// #include <nlohmann/detail/input/json_sax.hpp>
+
 // #include <nlohmann/detail/exceptions.hpp>
 
 // #include <nlohmann/detail/macro_scope.hpp>
 
+// #include <nlohmann/detail/meta/is_sax.hpp>
+
 // #include <nlohmann/detail/value_t.hpp>
 
 
@@ -4859,14 +6006,16 @@ namespace detail
 ///////////////////
 
 /*!
-@brief deserialization of CBOR and MessagePack values
+@brief deserialization of CBOR, MessagePack, and UBJSON values
 */
-template<typename BasicJsonType>
+template<typename BasicJsonType, typename SAX = json_sax_dom_parser<BasicJsonType>>
 class binary_reader
 {
     using number_integer_t = typename BasicJsonType::number_integer_t;
     using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+    using number_float_t = typename BasicJsonType::number_float_t;
     using string_t = typename BasicJsonType::string_t;
+    using json_sax_t = SAX;
 
   public:
     /*!
@@ -4876,70 +6025,63 @@ class binary_reader
     */
     explicit binary_reader(input_adapter_t adapter) : ia(std::move(adapter))
     {
+        (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
         assert(ia);
     }
 
     /*!
-    @brief create a JSON value from CBOR input
-
+    @param[in] format  the binary format to parse
+    @param[in] sax_    a SAX event processor
     @param[in] strict  whether to expect the input to be consumed completed
-    @return JSON value created from CBOR input
 
-    @throw parse_error.110 if input ended unexpectedly or the end of file was
-                           not reached when @a strict was set to true
-    @throw parse_error.112 if unsupported byte was read
+    @return
     */
-    BasicJsonType parse_cbor(const bool strict)
+    bool sax_parse(const input_format_t format,
+                   json_sax_t* sax_,
+                   const bool strict = true)
     {
-        const auto res = parse_cbor_internal();
-        if (strict)
+        sax = sax_;
+        bool result = false;
+
+        switch (format)
         {
-            get();
-            expect_eof();
+            case input_format_t::cbor:
+                result = parse_cbor_internal();
+                break;
+
+            case input_format_t::msgpack:
+                result = parse_msgpack_internal();
+                break;
+
+            case input_format_t::ubjson:
+                result = parse_ubjson_internal();
+                break;
+
+            // LCOV_EXCL_START
+            default:
+                assert(false);
+                // LCOV_EXCL_STOP
         }
-        return res;
-    }
 
-    /*!
-    @brief create a JSON value from MessagePack input
-
-    @param[in] strict  whether to expect the input to be consumed completed
-    @return JSON value created from MessagePack input
-
-    @throw parse_error.110 if input ended unexpectedly or the end of file was
-                           not reached when @a strict was set to true
-    @throw parse_error.112 if unsupported byte was read
-    */
-    BasicJsonType parse_msgpack(const bool strict)
-    {
-        const auto res = parse_msgpack_internal();
-        if (strict)
+        // strict mode: next byte must be EOF
+        if (result and strict)
         {
-            get();
-            expect_eof();
+            if (format == input_format_t::ubjson)
+            {
+                get_ignore_noop();
+            }
+            else
+            {
+                get();
+            }
+
+            if (JSON_UNLIKELY(current != std::char_traits<char>::eof()))
+            {
+                return sax->parse_error(chars_read, get_token_string(), parse_error::create(110, chars_read, "expected end of input"));
+            }
         }
-        return res;
-    }
 
-    /*!
-    @brief create a JSON value from UBJSON input
-
-    @param[in] strict  whether to expect the input to be consumed completed
-    @return JSON value created from UBJSON input
-
-    @throw parse_error.110 if input ended unexpectedly or the end of file was
-                           not reached when @a strict was set to true
-    @throw parse_error.112 if unsupported byte was read
-    */
-    BasicJsonType parse_ubjson(const bool strict)
-    {
-        const auto res = parse_ubjson_internal();
-        if (strict)
-        {
-            get_ignore_noop();
-            expect_eof();
-        }
-        return res;
+        return result;
     }
 
     /*!
@@ -4959,14 +6101,16 @@ class binary_reader
     @param[in] get_char  whether a new character should be retrieved from the
                          input (true, default) or whether the last read
                          character should be considered instead
+
+    @return whether a valid CBOR value was passed to the SAX parser
     */
-    BasicJsonType parse_cbor_internal(const bool get_char = true)
+    bool parse_cbor_internal(const bool get_char = true)
     {
         switch (get_char ? get() : current)
         {
             // EOF
             case std::char_traits<char>::eof():
-                JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+                return unexpect_eof();
 
             // Integer 0x00..0x17 (0..23)
             case 0x00:
@@ -4993,19 +6137,31 @@ class binary_reader
             case 0x15:
             case 0x16:
             case 0x17:
-                return static_cast<number_unsigned_t>(current);
+                return sax->number_unsigned(static_cast<number_unsigned_t>(current));
 
             case 0x18: // Unsigned integer (one-byte uint8_t follows)
-                return get_number<uint8_t>();
+            {
+                uint8_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0x19: // Unsigned integer (two-byte uint16_t follows)
-                return get_number<uint16_t>();
+            {
+                uint16_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0x1A: // Unsigned integer (four-byte uint32_t follows)
-                return get_number<uint32_t>();
+            {
+                uint32_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0x1B: // Unsigned integer (eight-byte uint64_t follows)
-                return get_number<uint64_t>();
+            {
+                uint64_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             // Negative integer -1-0x00..-1-0x17 (-1..-24)
             case 0x20:
@@ -5032,27 +6188,31 @@ class binary_reader
             case 0x35:
             case 0x36:
             case 0x37:
-                return static_cast<int8_t>(0x20 - 1 - current);
+                return sax->number_integer(static_cast<int8_t>(0x20 - 1 - current));
 
             case 0x38: // Negative integer (one-byte uint8_t follows)
             {
-                return static_cast<number_integer_t>(-1) - get_number<uint8_t>();
+                uint8_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
             }
 
             case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
             {
-                return static_cast<number_integer_t>(-1) - get_number<uint16_t>();
+                uint16_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
             }
 
             case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
             {
-                return static_cast<number_integer_t>(-1) - get_number<uint32_t>();
+                uint32_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
             }
 
             case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
             {
-                return static_cast<number_integer_t>(-1) -
-                       static_cast<number_integer_t>(get_number<uint64_t>());
+                uint64_t number;
+                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1)
+                        - static_cast<number_integer_t>(number));
             }
 
             // UTF-8 string (0x00..0x17 bytes follow)
@@ -5086,7 +6246,8 @@ class binary_reader
             case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
             case 0x7F: // UTF-8 string (indefinite length)
             {
-                return get_cbor_string();
+                string_t s;
+                return get_cbor_string(s) and sax->string(s);
             }
 
             // array (0x00..0x17 data items follow)
@@ -5114,39 +6275,34 @@ class binary_reader
             case 0x95:
             case 0x96:
             case 0x97:
-            {
-                return get_cbor_array(current & 0x1F);
-            }
+                return get_cbor_array(static_cast<std::size_t>(current & 0x1F));
 
             case 0x98: // array (one-byte uint8_t for n follows)
             {
-                return get_cbor_array(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x99: // array (two-byte uint16_t for n follow)
             {
-                return get_cbor_array(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x9A: // array (four-byte uint32_t for n follow)
             {
-                return get_cbor_array(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x9B: // array (eight-byte uint64_t for n follow)
             {
-                return get_cbor_array(get_number<uint64_t>());
+                uint64_t len;
+                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
             }
 
             case 0x9F: // array (indefinite length)
-            {
-                BasicJsonType result = value_t::array;
-                while (get() != 0xFF)
-                {
-                    result.push_back(parse_cbor_internal(false));
-                }
-                return result;
-            }
+                return get_cbor_array(std::size_t(-1));
 
             // map (0x00..0x17 pairs of data items follow)
             case 0xA0:
@@ -5173,62 +6329,56 @@ class binary_reader
             case 0xB5:
             case 0xB6:
             case 0xB7:
-            {
-                return get_cbor_object(current & 0x1F);
-            }
+                return get_cbor_object(static_cast<std::size_t>(current & 0x1F));
 
             case 0xB8: // map (one-byte uint8_t for n follows)
             {
-                return get_cbor_object(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xB9: // map (two-byte uint16_t for n follow)
             {
-                return get_cbor_object(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xBA: // map (four-byte uint32_t for n follow)
             {
-                return get_cbor_object(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xBB: // map (eight-byte uint64_t for n follow)
             {
-                return get_cbor_object(get_number<uint64_t>());
+                uint64_t len;
+                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
             }
 
             case 0xBF: // map (indefinite length)
-            {
-                BasicJsonType result = value_t::object;
-                while (get() != 0xFF)
-                {
-                    auto key = get_cbor_string();
-                    result[key] = parse_cbor_internal();
-                }
-                return result;
-            }
+                return get_cbor_object(std::size_t(-1));
 
             case 0xF4: // false
-            {
-                return false;
-            }
+                return sax->boolean(false);
 
             case 0xF5: // true
-            {
-                return true;
-            }
+                return sax->boolean(true);
 
             case 0xF6: // null
-            {
-                return value_t::null;
-            }
+                return sax->null();
 
             case 0xF9: // Half-Precision Float (two-byte IEEE 754)
             {
                 const int byte1 = get();
-                unexpect_eof();
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
                 const int byte2 = get();
-                unexpect_eof();
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
 
                 // code from RFC 7049, Appendix D, Figure 3:
                 // As half-precision floating-point numbers were only added
@@ -5239,51 +6389,59 @@ class binary_reader
                 // half-precision floating-point numbers in the C language
                 // is shown in Fig. 3.
                 const int half = (byte1 << 8) + byte2;
-                const int exp = (half >> 10) & 0x1F;
-                const int mant = half & 0x3FF;
-                double val;
-                if (exp == 0)
+                const double val = [&half]
                 {
-                    val = std::ldexp(mant, -24);
-                }
-                else if (exp != 31)
-                {
-                    val = std::ldexp(mant + 1024, exp - 25);
-                }
-                else
-                {
-                    val = (mant == 0) ? std::numeric_limits<double>::infinity()
-                          : std::numeric_limits<double>::quiet_NaN();
-                }
-                return (half & 0x8000) != 0 ? -val : val;
+                    const int exp = (half >> 10) & 0x1F;
+                    const int mant = half & 0x3FF;
+                    assert(0 <= exp and exp <= 32);
+                    assert(0 <= mant and mant <= 1024);
+                    switch (exp)
+                    {
+                        case 0:
+                            return std::ldexp(mant, -24);
+                        case 31:
+                            return (mant == 0)
+                            ? std::numeric_limits<double>::infinity()
+                            : std::numeric_limits<double>::quiet_NaN();
+                        default:
+                            return std::ldexp(mant + 1024, exp - 25);
+                    }
+                }();
+                return sax->number_float((half & 0x8000) != 0
+                                         ? static_cast<number_float_t>(-val)
+                                         : static_cast<number_float_t>(val), "");
             }
 
             case 0xFA: // Single-Precision Float (four-byte IEEE 754)
             {
-                return get_number<float>();
+                float number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
             }
 
             case 0xFB: // Double-Precision Float (eight-byte IEEE 754)
             {
-                return get_number<double>();
+                double number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
             }
 
             default: // anything else (0xFF is handled inside the other types)
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read, "error reading CBOR; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "error reading CBOR; last byte: 0x" + last_token));
             }
         }
     }
 
-    BasicJsonType parse_msgpack_internal()
+    /*!
+    @return whether a valid MessagePack value was passed to the SAX parser
+    */
+    bool parse_msgpack_internal()
     {
         switch (get())
         {
             // EOF
             case std::char_traits<char>::eof():
-                JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+                return unexpect_eof();
 
             // positive fixint
             case 0x00:
@@ -5414,7 +6572,7 @@ class binary_reader
             case 0x7D:
             case 0x7E:
             case 0x7F:
-                return static_cast<number_unsigned_t>(current);
+                return sax->number_unsigned(static_cast<number_unsigned_t>(current));
 
             // fixmap
             case 0x80:
@@ -5433,9 +6591,7 @@ class binary_reader
             case 0x8D:
             case 0x8E:
             case 0x8F:
-            {
-                return get_msgpack_object(current & 0x0F);
-            }
+                return get_msgpack_object(static_cast<std::size_t>(current & 0x0F));
 
             // fixarray
             case 0x90:
@@ -5454,9 +6610,7 @@ class binary_reader
             case 0x9D:
             case 0x9E:
             case 0x9F:
-            {
-                return get_msgpack_array(current & 0x0F);
-            }
+                return get_msgpack_array(static_cast<std::size_t>(current & 0x0F));
 
             // fixstr
             case 0xA0:
@@ -5491,73 +6645,113 @@ class binary_reader
             case 0xBD:
             case 0xBE:
             case 0xBF:
-                return get_msgpack_string();
+            {
+                string_t s;
+                return get_msgpack_string(s) and sax->string(s);
+            }
 
             case 0xC0: // nil
-                return value_t::null;
+                return sax->null();
 
             case 0xC2: // false
-                return false;
+                return sax->boolean(false);
 
             case 0xC3: // true
-                return true;
+                return sax->boolean(true);
 
             case 0xCA: // float 32
-                return get_number<float>();
+            {
+                float number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
 
             case 0xCB: // float 64
-                return get_number<double>();
+            {
+                double number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
 
             case 0xCC: // uint 8
-                return get_number<uint8_t>();
+            {
+                uint8_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xCD: // uint 16
-                return get_number<uint16_t>();
+            {
+                uint16_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xCE: // uint 32
-                return get_number<uint32_t>();
+            {
+                uint32_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xCF: // uint 64
-                return get_number<uint64_t>();
+            {
+                uint64_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
 
             case 0xD0: // int 8
-                return get_number<int8_t>();
+            {
+                int8_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD1: // int 16
-                return get_number<int16_t>();
+            {
+                int16_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD2: // int 32
-                return get_number<int32_t>();
+            {
+                int32_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD3: // int 64
-                return get_number<int64_t>();
+            {
+                int64_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
 
             case 0xD9: // str 8
             case 0xDA: // str 16
             case 0xDB: // str 32
-                return get_msgpack_string();
+            {
+                string_t s;
+                return get_msgpack_string(s) and sax->string(s);
+            }
 
             case 0xDC: // array 16
             {
-                return get_msgpack_array(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_msgpack_array(static_cast<std::size_t>(len));
             }
 
             case 0xDD: // array 32
             {
-                return get_msgpack_array(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_msgpack_array(static_cast<std::size_t>(len));
             }
 
             case 0xDE: // map 16
             {
-                return get_msgpack_object(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_msgpack_object(static_cast<std::size_t>(len));
             }
 
             case 0xDF: // map 32
             {
-                return get_msgpack_object(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_msgpack_object(static_cast<std::size_t>(len));
             }
 
-            // positive fixint
+            // negative fixint
             case 0xE0:
             case 0xE1:
             case 0xE2:
@@ -5590,14 +6784,12 @@ class binary_reader
             case 0xFD:
             case 0xFE:
             case 0xFF:
-                return static_cast<int8_t>(current);
+                return sax->number_integer(static_cast<int8_t>(current));
 
             default: // anything else
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read,
-                                               "error reading MessagePack; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "error reading MessagePack; last byte: 0x" + last_token));
             }
         }
     }
@@ -5606,8 +6798,10 @@ class binary_reader
     @param[in] get_char  whether a new character should be retrieved from the
                          input (true, default) or whether the last read
                          character should be considered instead
+
+    @return whether a valid UBJSON value was passed to the SAX parser
     */
-    BasicJsonType parse_ubjson_internal(const bool get_char = true)
+    bool parse_ubjson_internal(const bool get_char = true)
     {
         return get_ubjson_value(get_char ? get_ignore_noop() : current);
     }
@@ -5645,23 +6839,26 @@ class binary_reader
     @brief read a number from the input
 
     @tparam NumberType the type of the number
+    @param[out] result  number of type @a NumberType
 
-    @return number of type @a NumberType
+    @return whether conversion completed
 
     @note This function needs to respect the system's endianess, because
-          bytes in CBOR and MessagePack are stored in network order (big
-          endian) and therefore need reordering on little endian systems.
-
-    @throw parse_error.110 if input has less than `sizeof(NumberType)` bytes
+          bytes in CBOR, MessagePack, and UBJSON are stored in network order
+          (big endian) and therefore need reordering on little endian systems.
     */
-    template<typename NumberType> NumberType get_number()
+    template<typename NumberType>
+    bool get_number(NumberType& result)
     {
         // step 1: read input into array with system's byte order
         std::array<uint8_t, sizeof(NumberType)> vec;
         for (std::size_t i = 0; i < sizeof(NumberType); ++i)
         {
             get();
-            unexpect_eof();
+            if (JSON_UNLIKELY(not unexpect_eof()))
+            {
+                return false;
+            }
 
             // reverse byte order prior to conversion if necessary
             if (is_little_endian)
@@ -5675,35 +6872,37 @@ class binary_reader
         }
 
         // step 2: convert array into number of type T and return
-        NumberType result;
         std::memcpy(&result, vec.data(), sizeof(NumberType));
-        return result;
+        return true;
     }
 
     /*!
     @brief create a string by reading characters from the input
 
-    @param[in] len number of bytes to read
+    @tparam NumberType the type of the number
+    @param[in] len number of characters to read
+    @param[out] string created by reading @a len bytes
+
+    @return whether string creation completed
 
     @note We can not reserve @a len bytes for the result, because @a len
           may be too large. Usually, @ref unexpect_eof() detects the end of
           the input before we run out of string memory.
-
-    @return string created by reading @a len bytes
-
-    @throw parse_error.110 if input has less than @a len bytes
     */
     template<typename NumberType>
-    string_t get_string(const NumberType len)
+    bool get_string(const NumberType len, string_t& result)
     {
-        string_t result;
-        std::generate_n(std::back_inserter(result), len, [this]()
+        bool success = true;
+        std::generate_n(std::back_inserter(result), len, [this, &success]()
         {
             get();
-            unexpect_eof();
+            if (JSON_UNLIKELY(not unexpect_eof()))
+            {
+                success = false;
+            }
             return static_cast<char>(current);
         });
-        return result;
+        return success;
     }
 
     /*!
@@ -5713,14 +6912,16 @@ class binary_reader
     string length and then copies this number of bytes into a string.
     Additionally, CBOR's strings with indefinite lengths are supported.
 
-    @return string
+    @param[out] result  created string
 
-    @throw parse_error.110 if input ended
-    @throw parse_error.113 if an unexpected byte is read
+    @return whether string creation completed
     */
-    string_t get_cbor_string()
+    bool get_cbor_string(string_t& result)
     {
-        unexpect_eof();
+        if (JSON_UNLIKELY(not unexpect_eof()))
+        {
+            return false;
+        }
 
         switch (current)
         {
@@ -5750,73 +6951,137 @@ class binary_reader
             case 0x76:
             case 0x77:
             {
-                return get_string(current & 0x1F);
+                return get_string(current & 0x1F, result);
             }
 
             case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
             {
-                return get_string(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
             {
-                return get_string(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
             {
-                return get_string(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
             {
-                return get_string(get_number<uint64_t>());
+                uint64_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0x7F: // UTF-8 string (indefinite length)
             {
-                string_t result;
                 while (get() != 0xFF)
                 {
-                    result.append(get_cbor_string());
+                    string_t chunk;
+                    if (not get_cbor_string(chunk))
+                    {
+                        return false;
+                    }
+                    result.append(chunk);
                 }
-                return result;
+                return true;
             }
 
             default:
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(113, chars_read, "expected a CBOR string; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "expected a CBOR string; last byte: 0x" + last_token));
             }
         }
     }
 
-    template<typename NumberType>
-    BasicJsonType get_cbor_array(const NumberType len)
+    /*!
+    @param[in] len  the length of the array or std::size_t(-1) for an
+                    array of indefinite size
+    @return whether array creation completed
+    */
+    bool get_cbor_array(const std::size_t len)
     {
-        BasicJsonType result = value_t::array;
-        std::generate_n(std::back_inserter(*result.m_value.array), len, [this]()
+        if (JSON_UNLIKELY(not sax->start_array(len)))
         {
-            return parse_cbor_internal();
-        });
-        return result;
+            return false;
+        }
+
+        if (len != std::size_t(-1))
+            for (std::size_t i = 0; i < len; ++i)
+            {
+                if (JSON_UNLIKELY(not parse_cbor_internal()))
+                {
+                    return false;
+                }
+            }
+        else
+        {
+            while (get() != 0xFF)
+            {
+                if (JSON_UNLIKELY(not parse_cbor_internal(false)))
+                {
+                    return false;
+                }
+            }
+        }
+
+        return sax->end_array();
     }
 
-    template<typename NumberType>
-    BasicJsonType get_cbor_object(const NumberType len)
+    /*!
+    @param[in] len  the length of the object or std::size_t(-1) for an
+                    object of indefinite size
+    @return whether object creation completed
+    */
+    bool get_cbor_object(const std::size_t len)
     {
-        BasicJsonType result = value_t::object;
-        std::generate_n(std::inserter(*result.m_value.object,
-                                      result.m_value.object->end()),
-                        len, [this]()
+        if (not JSON_UNLIKELY(sax->start_object(len)))
         {
-            get();
-            auto key = get_cbor_string();
-            auto val = parse_cbor_internal();
-            return std::make_pair(std::move(key), std::move(val));
-        });
-        return result;
+            return false;
+        }
+
+        string_t key;
+        if (len != std::size_t(-1))
+        {
+            for (std::size_t i = 0; i < len; ++i)
+            {
+                get();
+                if (JSON_UNLIKELY(not get_cbor_string(key) or not sax->key(key)))
+                {
+                    return false;
+                }
+
+                if (JSON_UNLIKELY(not parse_cbor_internal()))
+                {
+                    return false;
+                }
+                key.clear();
+            }
+        }
+        else
+        {
+            while (get() != 0xFF)
+            {
+                if (JSON_UNLIKELY(not get_cbor_string(key) or not sax->key(key)))
+                {
+                    return false;
+                }
+
+                if (JSON_UNLIKELY(not parse_cbor_internal()))
+                {
+                    return false;
+                }
+                key.clear();
+            }
+        }
+
+        return sax->end_object();
     }
 
     /*!
@@ -5825,14 +7090,16 @@ class binary_reader
     This function first reads starting bytes to determine the expected
     string length and then copies this number of bytes into a string.
 
-    @return string
+    @param[out] result  created string
 
-    @throw parse_error.110 if input ended
-    @throw parse_error.113 if an unexpected byte is read
+    @return whether string creation completed
     */
-    string_t get_msgpack_string()
+    bool get_msgpack_string(string_t& result)
     {
-        unexpect_eof();
+        if (JSON_UNLIKELY(not unexpect_eof()))
+        {
+            return false;
+        }
 
         switch (current)
         {
@@ -5870,59 +7137,85 @@ class binary_reader
             case 0xBE:
             case 0xBF:
             {
-                return get_string(current & 0x1F);
+                return get_string(current & 0x1F, result);
             }
 
             case 0xD9: // str 8
             {
-                return get_string(get_number<uint8_t>());
+                uint8_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0xDA: // str 16
             {
-                return get_string(get_number<uint16_t>());
+                uint16_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             case 0xDB: // str 32
             {
-                return get_string(get_number<uint32_t>());
+                uint32_t len;
+                return get_number(len) and get_string(len, result);
             }
 
             default:
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(113, chars_read,
-                                               "expected a MessagePack string; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "expected a MessagePack string; last byte: 0x" + last_token));
             }
         }
     }
 
-    template<typename NumberType>
-    BasicJsonType get_msgpack_array(const NumberType len)
+    /*!
+    @param[in] len  the length of the array
+    @return whether array creation completed
+    */
+    bool get_msgpack_array(const std::size_t len)
     {
-        BasicJsonType result = value_t::array;
-        std::generate_n(std::back_inserter(*result.m_value.array), len, [this]()
+        if (JSON_UNLIKELY(not sax->start_array(len)))
         {
-            return parse_msgpack_internal();
-        });
-        return result;
+            return false;
+        }
+
+        for (std::size_t i = 0; i < len; ++i)
+        {
+            if (JSON_UNLIKELY(not parse_msgpack_internal()))
+            {
+                return false;
+            }
+        }
+
+        return sax->end_array();
     }
 
-    template<typename NumberType>
-    BasicJsonType get_msgpack_object(const NumberType len)
+    /*!
+    @param[in] len  the length of the object
+    @return whether object creation completed
+    */
+    bool get_msgpack_object(const std::size_t len)
     {
-        BasicJsonType result = value_t::object;
-        std::generate_n(std::inserter(*result.m_value.object,
-                                      result.m_value.object->end()),
-                        len, [this]()
+        if (JSON_UNLIKELY(not sax->start_object(len)))
+        {
+            return false;
+        }
+
+        string_t key;
+        for (std::size_t i = 0; i < len; ++i)
         {
             get();
-            auto key = get_msgpack_string();
-            auto val = parse_msgpack_internal();
-            return std::make_pair(std::move(key), std::move(val));
-        });
-        return result;
+            if (JSON_UNLIKELY(not get_msgpack_string(key) or not sax->key(key)))
+            {
+                return false;
+            }
+
+            if (JSON_UNLIKELY(not parse_msgpack_internal()))
+            {
+                return false;
+            }
+            key.clear();
+        }
+
+        return sax->end_object();
     }
 
     /*!
@@ -5932,41 +7225,131 @@ class binary_reader
     indicating a string, or in case of an object key where the 'S' byte can be
     left out.
 
+    @param[out] result   created string
     @param[in] get_char  whether a new character should be retrieved from the
                          input (true, default) or whether the last read
                          character should be considered instead
 
-    @return string
-
-    @throw parse_error.110 if input ended
-    @throw parse_error.113 if an unexpected byte is read
+    @return whether string creation completed
     */
-    string_t get_ubjson_string(const bool get_char = true)
+    bool get_ubjson_string(string_t& result, const bool get_char = true)
     {
         if (get_char)
         {
             get();  // TODO: may we ignore N here?
         }
 
-        unexpect_eof();
+        if (JSON_UNLIKELY(not unexpect_eof()))
+        {
+            return false;
+        }
 
         switch (current)
         {
             case 'U':
-                return get_string(get_number<uint8_t>());
+            {
+                uint8_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'i':
-                return get_string(get_number<int8_t>());
+            {
+                int8_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'I':
-                return get_string(get_number<int16_t>());
+            {
+                int16_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'l':
-                return get_string(get_number<int32_t>());
+            {
+                int32_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             case 'L':
-                return get_string(get_number<int64_t>());
+            {
+                int64_t len;
+                return get_number(len) and get_string(len, result);
+            }
+
             default:
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(113, chars_read,
-                                               "expected a UBJSON string; last byte: 0x" + ss.str()));
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "expected a UBJSON string; last byte: 0x" + last_token));
+        }
+    }
+
+    /*!
+    @param[out] result  determined size
+    @return whether size determination completed
+    */
+    bool get_ubjson_size_value(std::size_t& result)
+    {
+        switch (get_ignore_noop())
+        {
+            case 'U':
+            {
+                uint8_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'i':
+            {
+                int8_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'I':
+            {
+                int16_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'l':
+            {
+                int32_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            case 'L':
+            {
+                int64_t number;
+                if (JSON_UNLIKELY(not get_number(number)))
+                {
+                    return false;
+                }
+                result = static_cast<std::size_t>(number);
+                return true;
+            }
+
+            default:
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "byte after '#' must denote a number type; last byte: 0x" + last_token));
+            }
         }
     }
 
@@ -5976,84 +7359,127 @@ class binary_reader
     In the optimized UBJSON format, a type and a size can be provided to allow
     for a more compact representation.
 
-    @return pair of the size and the type
+    @param[out] result  pair of the size and the type
+
+    @return whether pair creation completed
     */
-    std::pair<std::size_t, int> get_ubjson_size_type()
+    bool get_ubjson_size_type(std::pair<std::size_t, int>& result)
     {
-        std::size_t sz = string_t::npos;
-        int tc = 0;
+        result.first = string_t::npos; // size
+        result.second = 0; // type
 
         get_ignore_noop();
 
         if (current == '$')
         {
-            tc = get();  // must not ignore 'N', because 'N' maybe the type
-            unexpect_eof();
+            result.second = get();  // must not ignore 'N', because 'N' maybe the type
+            if (JSON_UNLIKELY(not unexpect_eof()))
+            {
+                return false;
+            }
 
             get_ignore_noop();
-            if (current != '#')
+            if (JSON_UNLIKELY(current != '#'))
             {
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read,
-                                               "expected '#' after UBJSON type information; last byte: 0x" + ss.str()));
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "expected '#' after UBJSON type information; last byte: 0x" + last_token));
             }
-            sz = parse_ubjson_internal();
+
+            return get_ubjson_size_value(result.first);
         }
         else if (current == '#')
         {
-            sz = parse_ubjson_internal();
+            return get_ubjson_size_value(result.first);
         }
-
-        return std::make_pair(sz, tc);
+        return true;
     }
 
-    BasicJsonType get_ubjson_value(const int prefix)
+    /*!
+    @param prefix  the previously read or set type prefix
+    @return whether value creation completed
+    */
+    bool get_ubjson_value(const int prefix)
     {
         switch (prefix)
         {
             case std::char_traits<char>::eof():  // EOF
-                JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+                return unexpect_eof();
 
             case 'T':  // true
-                return true;
+                return sax->boolean(true);
             case 'F':  // false
-                return false;
+                return sax->boolean(false);
 
             case 'Z':  // null
-                return nullptr;
+                return sax->null();
 
             case 'U':
-                return get_number<uint8_t>();
+            {
+                uint8_t number;
+                return get_number(number) and sax->number_unsigned(number);
+            }
+
             case 'i':
-                return get_number<int8_t>();
+            {
+                int8_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'I':
-                return get_number<int16_t>();
+            {
+                int16_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'l':
-                return get_number<int32_t>();
+            {
+                int32_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'L':
-                return get_number<int64_t>();
+            {
+                int64_t number;
+                return get_number(number) and sax->number_integer(number);
+            }
+
             case 'd':
-                return get_number<float>();
+            {
+                float number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
+
             case 'D':
-                return get_number<double>();
+            {
+                double number;
+                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+            }
 
             case 'C':  // char
             {
                 get();
-                unexpect_eof();
+                if (JSON_UNLIKELY(not unexpect_eof()))
+                {
+                    return false;
+                }
                 if (JSON_UNLIKELY(current > 127))
                 {
-                    std::stringstream ss;
-                    ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                    JSON_THROW(parse_error::create(113, chars_read,
-                                                   "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + ss.str()));
+                    auto last_token = get_token_string();
+                    return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + last_token));
                 }
-                return string_t(1, static_cast<char>(current));
+                string_t s(1, static_cast<char>(current));
+                return sax->string(s);
             }
 
             case 'S':  // string
-                return get_ubjson_string();
+            {
+                string_t s;
+                return get_ubjson_string(s) and sax->string(s);
+            }
 
             case '[':  // array
                 return get_ubjson_array();
@@ -6062,129 +7488,170 @@ class binary_reader
                 return get_ubjson_object();
 
             default: // anything else
-                std::stringstream ss;
-                ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
-                JSON_THROW(parse_error::create(112, chars_read,
-                                               "error reading UBJSON; last byte: 0x" + ss.str()));
+            {
+                auto last_token = get_token_string();
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, "error reading UBJSON; last byte: 0x" + last_token));
+            }
         }
     }
 
-    BasicJsonType get_ubjson_array()
+    /*!
+    @return whether array creation completed
+    */
+    bool get_ubjson_array()
     {
-        BasicJsonType result = value_t::array;
-        const auto size_and_type = get_ubjson_size_type();
+        std::pair<std::size_t, int> size_and_type;
+        if (JSON_UNLIKELY(not get_ubjson_size_type(size_and_type)))
+        {
+            return false;
+        }
 
         if (size_and_type.first != string_t::npos)
         {
-            if (JSON_UNLIKELY(size_and_type.first > result.max_size()))
+            if (JSON_UNLIKELY(not sax->start_array(size_and_type.first)))
             {
-                JSON_THROW(out_of_range::create(408,
-                                                "excessive array size: " + std::to_string(size_and_type.first)));
+                return false;
             }
 
             if (size_and_type.second != 0)
             {
                 if (size_and_type.second != 'N')
                 {
-                    std::generate_n(std::back_inserter(*result.m_value.array),
-                                    size_and_type.first, [this, size_and_type]()
+                    for (std::size_t i = 0; i < size_and_type.first; ++i)
                     {
-                        return get_ubjson_value(size_and_type.second);
-                    });
+                        if (JSON_UNLIKELY(not get_ubjson_value(size_and_type.second)))
+                        {
+                            return false;
+                        }
+                    }
                 }
             }
             else
             {
-                std::generate_n(std::back_inserter(*result.m_value.array),
-                                size_and_type.first, [this]()
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
                 {
-                    return parse_ubjson_internal();
-                });
+                    if (JSON_UNLIKELY(not parse_ubjson_internal()))
+                    {
+                        return false;
+                    }
+                }
             }
         }
         else
         {
+            if (JSON_UNLIKELY(not sax->start_array(std::size_t(-1))))
+            {
+                return false;
+            }
+
             while (current != ']')
             {
-                result.push_back(parse_ubjson_internal(false));
+                if (JSON_UNLIKELY(not parse_ubjson_internal(false)))
+                {
+                    return false;
+                }
                 get_ignore_noop();
             }
         }
 
-        return result;
+        return sax->end_array();
     }
 
-    BasicJsonType get_ubjson_object()
+    /*!
+    @return whether object creation completed
+    */
+    bool get_ubjson_object()
     {
-        BasicJsonType result = value_t::object;
-        const auto size_and_type = get_ubjson_size_type();
+        std::pair<std::size_t, int> size_and_type;
+        if (JSON_UNLIKELY(not get_ubjson_size_type(size_and_type)))
+        {
+            return false;
+        }
 
+        string_t key;
         if (size_and_type.first != string_t::npos)
         {
-            if (JSON_UNLIKELY(size_and_type.first > result.max_size()))
+            if (JSON_UNLIKELY(not sax->start_object(size_and_type.first)))
             {
-                JSON_THROW(out_of_range::create(408,
-                                                "excessive object size: " + std::to_string(size_and_type.first)));
+                return false;
             }
 
             if (size_and_type.second != 0)
             {
-                std::generate_n(std::inserter(*result.m_value.object,
-                                              result.m_value.object->end()),
-                                size_and_type.first, [this, size_and_type]()
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
                 {
-                    auto key = get_ubjson_string();
-                    auto val = get_ubjson_value(size_and_type.second);
-                    return std::make_pair(std::move(key), std::move(val));
-                });
+                    if (JSON_UNLIKELY(not get_ubjson_string(key) or not sax->key(key)))
+                    {
+                        return false;
+                    }
+                    if (JSON_UNLIKELY(not get_ubjson_value(size_and_type.second)))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
             }
             else
             {
-                std::generate_n(std::inserter(*result.m_value.object,
-                                              result.m_value.object->end()),
-                                size_and_type.first, [this]()
+                for (std::size_t i = 0; i < size_and_type.first; ++i)
                 {
-                    auto key = get_ubjson_string();
-                    auto val = parse_ubjson_internal();
-                    return std::make_pair(std::move(key), std::move(val));
-                });
+                    if (JSON_UNLIKELY(not get_ubjson_string(key) or not sax->key(key)))
+                    {
+                        return false;
+                    }
+                    if (JSON_UNLIKELY(not parse_ubjson_internal()))
+                    {
+                        return false;
+                    }
+                    key.clear();
+                }
             }
         }
         else
         {
+            if (JSON_UNLIKELY(not sax->start_object(std::size_t(-1))))
+            {
+                return false;
+            }
+
             while (current != '}')
             {
-                auto key = get_ubjson_string(false);
-                result[std::move(key)] = parse_ubjson_internal();
+                if (JSON_UNLIKELY(not get_ubjson_string(key, false) or not sax->key(key)))
+                {
+                    return false;
+                }
+                if (JSON_UNLIKELY(not parse_ubjson_internal()))
+                {
+                    return false;
+                }
                 get_ignore_noop();
+                key.clear();
             }
         }
 
-        return result;
+        return sax->end_object();
     }
 
     /*!
-    @brief throw if end of input is not reached
-    @throw parse_error.110 if input not ended
+    @return whether the last read character is not EOF
     */
-    void expect_eof() const
-    {
-        if (JSON_UNLIKELY(current != std::char_traits<char>::eof()))
-        {
-            JSON_THROW(parse_error::create(110, chars_read, "expected end of input"));
-        }
-    }
-
-    /*!
-    @briefthrow if end of input is reached
-    @throw parse_error.110 if input ended
-    */
-    void unexpect_eof() const
+    bool unexpect_eof() const
     {
         if (JSON_UNLIKELY(current == std::char_traits<char>::eof()))
         {
-            JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+            return sax->parse_error(chars_read, "<end of file>", parse_error::create(110, chars_read, "unexpected end of input"));
         }
+        return true;
+    }
+
+    /*!
+    @return a string representation of the last read byte
+    */
+    std::string get_token_string() const
+    {
+        char cr[3];
+        snprintf(cr, 3, "%.2hhX", static_cast<unsigned char>(current));
+        return std::string{cr};
     }
 
   private:
@@ -6199,6 +7666,9 @@ class binary_reader
 
     /// whether we can assume little endianess
     const bool is_little_endian = little_endianess();
+
+    /// the SAX parser
+    json_sax_t* sax = nullptr;
 };
 }
 }
@@ -6357,9 +7827,9 @@ class binary_writer
                 break;
             }
 
-            case value_t::number_float: // Double-Precision Float
+            case value_t::number_float:
             {
-                oa->write_character(static_cast<CharType>(0xFB));
+                oa->write_character(get_cbor_float_prefix(j.m_value.number_float));
                 write_number(j.m_value.number_float);
                 break;
             }
@@ -6617,9 +8087,9 @@ class binary_writer
                 break;
             }
 
-            case value_t::number_float: // float 64
+            case value_t::number_float:
             {
-                oa->write_character(static_cast<CharType>(0xCB));
+                oa->write_character(get_msgpack_float_prefix(j.m_value.number_float));
                 write_number(j.m_value.number_float);
                 break;
             }
@@ -6796,7 +8266,7 @@ class binary_writer
                 if (use_type and not j.m_value.array->empty())
                 {
                     assert(use_count);
-                    const char first_prefix = ubjson_prefix(j.front());
+                    const CharType first_prefix = ubjson_prefix(j.front());
                     const bool same_prefix = std::all_of(j.begin() + 1, j.end(),
                                                          [this, first_prefix](const BasicJsonType & v)
                     {
@@ -6807,7 +8277,7 @@ class binary_writer
                     {
                         prefix_required = false;
                         oa->write_character(static_cast<CharType>('$'));
-                        oa->write_character(static_cast<CharType>(first_prefix));
+                        oa->write_character(first_prefix);
                     }
                 }
 
@@ -6841,7 +8311,7 @@ class binary_writer
                 if (use_type and not j.m_value.object->empty())
                 {
                     assert(use_count);
-                    const char first_prefix = ubjson_prefix(j.front());
+                    const CharType first_prefix = ubjson_prefix(j.front());
                     const bool same_prefix = std::all_of(j.begin(), j.end(),
                                                          [this, first_prefix](const BasicJsonType & v)
                     {
@@ -6852,7 +8322,7 @@ class binary_writer
                     {
                         prefix_required = false;
                         oa->write_character(static_cast<CharType>('$'));
-                        oa->write_character(static_cast<CharType>(first_prefix));
+                        oa->write_character(first_prefix);
                     }
                 }
 
@@ -6920,7 +8390,7 @@ class binary_writer
     {
         if (add_prefix)
         {
-            oa->write_character(static_cast<CharType>('D'));  // float64
+            oa->write_character(get_ubjson_float_prefix(n));
         }
         write_number(n);
     }
@@ -7041,7 +8511,7 @@ class binary_writer
           write_number_with_ubjson_prefix. Therefore, we return 'L' for any
           value that does not fit the previous limits.
     */
-    char ubjson_prefix(const BasicJsonType& j) const noexcept
+    CharType ubjson_prefix(const BasicJsonType& j) const noexcept
     {
         switch (j.type())
         {
@@ -7100,7 +8570,7 @@ class binary_writer
             }
 
             case value_t::number_float:
-                return 'D';
+                return get_ubjson_float_prefix(j.m_value.number_float);
 
             case value_t::string:
                 return 'S';
@@ -7116,6 +8586,36 @@ class binary_writer
         }
     }
 
+    static constexpr CharType get_cbor_float_prefix(float)
+    {
+        return static_cast<CharType>(0xFA);  // Single-Precision Float
+    }
+
+    static constexpr CharType get_cbor_float_prefix(double)
+    {
+        return static_cast<CharType>(0xFB);  // Double-Precision Float
+    }
+
+    static constexpr CharType get_msgpack_float_prefix(float)
+    {
+        return static_cast<CharType>(0xCA);  // float 32
+    }
+
+    static constexpr CharType get_msgpack_float_prefix(double)
+    {
+        return static_cast<CharType>(0xCB);  // float 64
+    }
+
+    static constexpr CharType get_ubjson_float_prefix(float)
+    {
+        return 'd';  // float 32
+    }
+
+    static constexpr CharType get_ubjson_float_prefix(double)
+    {
+        return 'D';  // float 64
+    }
+
   private:
     /// whether we can assume little endianess
     const bool is_little_endian = binary_reader<BasicJsonType>::little_endianess();
@@ -7138,11 +8638,8 @@ class binary_writer
 #include <cstddef> // size_t, ptrdiff_t
 #include <cstdint> // uint8_t
 #include <cstdio> // snprintf
-#include <iomanip> // setfill
-#include <iterator> // next
 #include <limits> // numeric_limits
 #include <string> // string
-#include <sstream> // stringstream
 #include <type_traits> // is_same
 
 // #include <nlohmann/detail/exceptions.hpp>
@@ -8037,7 +9534,7 @@ void grisu2(char* buf, int& len, int& decimal_exponent, FloatType value)
     // numbers, all float's can be recovered using strtod (and strtof). However, the resulting
     // decimal representations are not exactly "short".
     //
-    // The documentation for 'std::to_chars' (http://en.cppreference.com/w/cpp/utility/to_chars)
+    // The documentation for 'std::to_chars' (https://en.cppreference.com/w/cpp/utility/to_chars)
     // says "value is converted to a string as if by std::sprintf in the default ("C") locale"
     // and since sprintf promotes float's to double's, I think this is exactly what 'std::to_chars'
     // does.
@@ -8246,7 +9743,7 @@ char* to_chars(char* first, char* last, FloatType value)
 
 // #include <nlohmann/detail/macro_scope.hpp>
 
-// #include <nlohmann/detail/meta.hpp>
+// #include <nlohmann/detail/meta/cpp_future.hpp>
 
 // #include <nlohmann/detail/output/output_adapters.hpp>
 
@@ -8619,9 +10116,9 @@ class serializer
 
                 case UTF8_REJECT:  // decode found invalid UTF-8 byte
                 {
-                    std::stringstream ss;
-                    ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << static_cast<int>(byte);
-                    JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + ss.str()));
+                    std::string sn(3, '\0');
+                    snprintf(&sn[0], sn.size(), "%.2X", byte);
+                    JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + sn));
                 }
 
                 default:  // decode found yet incomplete multi-byte code point
@@ -8647,9 +10144,9 @@ class serializer
         else
         {
             // we finish reading, but do not accept: string was incomplete
-            std::stringstream ss;
-            ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << static_cast<int>(static_cast<uint8_t>(s.back()));
-            JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + ss.str()));
+            std::string sn(3, '\0');
+            snprintf(&sn[0], sn.size(), "%.2X", static_cast<uint8_t>(s.back()));
+            JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + sn));
         }
     }
 
@@ -9711,42 +11208,42 @@ and `from_json()` (@ref adl_serializer by default)
 
 @requirement The class satisfies the following concept requirements:
 - Basic
- - [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible):
+ - [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible):
    JSON values can be default constructed. The result will be a JSON null
    value.
- - [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible):
+ - [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible):
    A JSON value can be constructed from an rvalue argument.
- - [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible):
+ - [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible):
    A JSON value can be copy-constructed from an lvalue expression.
- - [MoveAssignable](http://en.cppreference.com/w/cpp/concept/MoveAssignable):
+ - [MoveAssignable](https://en.cppreference.com/w/cpp/named_req/MoveAssignable):
    A JSON value van be assigned from an rvalue argument.
- - [CopyAssignable](http://en.cppreference.com/w/cpp/concept/CopyAssignable):
+ - [CopyAssignable](https://en.cppreference.com/w/cpp/named_req/CopyAssignable):
    A JSON value can be copy-assigned from an lvalue expression.
- - [Destructible](http://en.cppreference.com/w/cpp/concept/Destructible):
+ - [Destructible](https://en.cppreference.com/w/cpp/named_req/Destructible):
    JSON values can be destructed.
 - Layout
- - [StandardLayoutType](http://en.cppreference.com/w/cpp/concept/StandardLayoutType):
+ - [StandardLayoutType](https://en.cppreference.com/w/cpp/named_req/StandardLayoutType):
    JSON values have
-   [standard layout](http://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
+   [standard layout](https://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
    All non-static data members are private and standard layout types, the
    class has no virtual functions or (virtual) base classes.
 - Library-wide
- - [EqualityComparable](http://en.cppreference.com/w/cpp/concept/EqualityComparable):
+ - [EqualityComparable](https://en.cppreference.com/w/cpp/named_req/EqualityComparable):
    JSON values can be compared with `==`, see @ref
    operator==(const_reference,const_reference).
- - [LessThanComparable](http://en.cppreference.com/w/cpp/concept/LessThanComparable):
+ - [LessThanComparable](https://en.cppreference.com/w/cpp/named_req/LessThanComparable):
    JSON values can be compared with `<`, see @ref
    operator<(const_reference,const_reference).
- - [Swappable](http://en.cppreference.com/w/cpp/concept/Swappable):
+ - [Swappable](https://en.cppreference.com/w/cpp/named_req/Swappable):
    Any JSON lvalue or rvalue of can be swapped with any lvalue or rvalue of
    other compatible types, using unqualified function call @ref swap().
- - [NullablePointer](http://en.cppreference.com/w/cpp/concept/NullablePointer):
+ - [NullablePointer](https://en.cppreference.com/w/cpp/named_req/NullablePointer):
    JSON values can be compared against `std::nullptr_t` objects which are used
    to model the `null` value.
 - Container
- - [Container](http://en.cppreference.com/w/cpp/concept/Container):
+ - [Container](https://en.cppreference.com/w/cpp/named_req/Container):
    JSON values can be used like STL containers and provide iterator access.
- - [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer);
+ - [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer);
    JSON values can be used like STL containers and provide reverse iterator
    access.
 
@@ -9780,8 +11277,12 @@ class basic_json
     friend class ::nlohmann::detail::iter_impl;
     template<typename BasicJsonType, typename CharType>
     friend class ::nlohmann::detail::binary_writer;
-    template<typename BasicJsonType>
+    template<typename BasicJsonType, typename SAX>
     friend class ::nlohmann::detail::binary_reader;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::json_sax_dom_parser;
+    template<typename BasicJsonType>
+    friend class ::nlohmann::detail::json_sax_dom_callback_parser;
 
     /// workaround type for MSVC
     using basic_json_t = NLOHMANN_BASIC_JSON_TPL;
@@ -9809,13 +11310,17 @@ class basic_json
 
   public:
     using value_t = detail::value_t;
-    /// @copydoc nlohmann::json_pointer
+    /// JSON Pointer, see @ref nlohmann::json_pointer
     using json_pointer = ::nlohmann::json_pointer<basic_json>;
     template<typename T, typename SFINAE>
     using json_serializer = JSONSerializer<T, SFINAE>;
     /// helper type for initializer lists of basic_json values
     using initializer_list_t = std::initializer_list<detail::json_ref<basic_json>>;
 
+    using input_format_t = detail::input_format_t;
+    /// SAX interface type, see @ref nlohmann::json_sax
+    using json_sax_t = json_sax<basic_json>;
+
     ////////////////
     // exceptions //
     ////////////////
@@ -10548,7 +12053,7 @@ class basic_json
                     object = nullptr;  // silence warning, see #821
                     if (JSON_UNLIKELY(t == value_t::null))
                     {
-                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.1.2")); // LCOV_EXCL_LINE
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.2.0")); // LCOV_EXCL_LINE
                     }
                     break;
                 }
@@ -10716,7 +12221,6 @@ class basic_json
     */
     using parser_callback_t = typename parser::parser_callback_t;
 
-
     //////////////////
     // constructors //
     //////////////////
@@ -10878,7 +12382,7 @@ class basic_json
     was provided), strong guarantee holds: if an exception is thrown, there are
     no changes to any JSON value.
 
-    @since version 3.1.2
+    @since version 3.2.0
     */
     template <typename BasicJsonType,
               detail::enable_if_t<
@@ -11198,7 +12702,7 @@ class basic_json
     @warning A precondition is enforced with a runtime assertion that will
              result in calling `std::abort` if this precondition is not met.
              Assertions can be disabled by defining `NDEBUG` at compile time.
-             See http://en.cppreference.com/w/cpp/error/assert for more
+             See https://en.cppreference.com/w/cpp/error/assert for more
              information.
 
     @throw invalid_iterator.201 if iterators @a first and @a last are not
@@ -11338,7 +12842,7 @@ class basic_json
     changes to any JSON value.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is linear.
     - As postcondition, it holds: `other == basic_json(other)`.
@@ -11423,7 +12927,7 @@ class basic_json
     exceptions.
 
     @requirement This function helps `basic_json` satisfying the
-    [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible)
+    [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible)
     requirements.
 
     @liveexample{The code below shows the move constructor explicitly called
@@ -11457,7 +12961,7 @@ class basic_json
     @complexity Linear.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is linear.
 
@@ -11494,7 +12998,7 @@ class basic_json
     @complexity Linear.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is linear.
     - All stored elements are destroyed and all memory is freed.
@@ -12111,7 +13615,7 @@ class basic_json
     @complexity Depending on the implementation of the called `from_json()`
                 method.
 
-    @since version 3.1.2
+    @since version 3.2.0
     */
     template<typename BasicJsonType, detail::enable_if_t<
                  not std::is_same<BasicJsonType, basic_json>::value and
@@ -12125,8 +13629,8 @@ class basic_json
     @brief get a value (explicit)
 
     Explicit type conversion between the JSON value and a compatible value
-    which is [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible)
-    and [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible).
+    which is [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+    and [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
     The value is converted by calling the @ref json_serializer<ValueType>
     `from_json()` method.
 
@@ -12186,8 +13690,8 @@ class basic_json
     @brief get a value (explicit); special case
 
     Explicit type conversion between the JSON value and a compatible value
-    which is **not** [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible)
-    and **not** [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible).
+    which is **not** [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+    and **not** [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
     The value is converted by calling the @ref json_serializer<ValueType>
     `from_json()` method.
 
@@ -12432,9 +13936,9 @@ class basic_json
                    not detail::is_basic_json<ValueType>::value
 #ifndef _MSC_VER  // fix for issue #167 operator<< ambiguity under VS2015
                    and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
-#endif
-#if defined(JSON_HAS_CPP_17)
+#if defined(JSON_HAS_CPP_17) && defined(_MSC_VER) and _MSC_VER <= 1914
                    and not std::is_same<ValueType, typename std::string_view>::value
+#endif
 #endif
                    , int >::type = 0 >
     operator ValueType() const
@@ -13016,7 +14520,7 @@ class basic_json
     @return copy of the element at key @a key or @a default_value if @a key
     is not found
 
-    @throw type_error.306 if the JSON value is not an objec; in that case,
+    @throw type_error.306 if the JSON value is not an object; in that case,
     using `value()` with a key makes no sense.
 
     @complexity Logarithmic in the size of the container.
@@ -13040,7 +14544,7 @@ class basic_json
             {
                 return ptr.get_checked(this);
             }
-            JSON_CATCH (out_of_range&)
+            JSON_INTERNAL_CATCH (out_of_range&)
             {
                 return default_value;
             }
@@ -13551,7 +15055,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
 
@@ -13590,7 +15094,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).begin()`.
@@ -13622,7 +15126,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
 
@@ -13661,7 +15165,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).end()`.
@@ -13691,7 +15195,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `reverse_iterator(end())`.
@@ -13728,7 +15232,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `reverse_iterator(begin())`.
@@ -13765,7 +15269,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).rbegin()`.
@@ -13794,7 +15298,7 @@ class basic_json
     @complexity Constant.
 
     @requirement This function helps `basic_json` satisfying the
-    [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+    [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
     requirements:
     - The complexity is constant.
     - Has the semantics of `const_cast<const basic_json&>(*this).rend()`.
@@ -13935,7 +15439,7 @@ class basic_json
 
     @complexity Constant.
 
-    @since version 3.x.x.
+    @since version 3.1.0.
     */
     iteration_proxy<iterator> items() noexcept
     {
@@ -13992,7 +15496,7 @@ class basic_json
     false in the case of a string.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `begin() == end()`.
@@ -14063,7 +15567,7 @@ class basic_json
     the case of a string.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of `std::distance(begin(), end())`.
@@ -14133,7 +15637,7 @@ class basic_json
     @exceptionsafety No-throw guarantee: this function never throws exceptions.
 
     @requirement This function helps `basic_json` satisfying the
-    [Container](http://en.cppreference.com/w/cpp/concept/Container)
+    [Container](https://en.cppreference.com/w/cpp/named_req/Container)
     requirements:
     - The complexity is constant.
     - Has the semantics of returning `b.size()` where `b` is the largest
@@ -15602,7 +17106,7 @@ class basic_json
 
     @since version 2.0.3 (contiguous containers)
     */
-    static basic_json parse(detail::input_adapter i,
+    static basic_json parse(detail::input_adapter&& i,
                             const parser_callback_t cb = nullptr,
                             const bool allow_exceptions = true)
     {
@@ -15611,26 +17115,80 @@ class basic_json
         return result;
     }
 
+    static bool accept(detail::input_adapter&& i)
+    {
+        return parser(i).accept(true);
+    }
+
     /*!
-    @copydoc basic_json parse(detail::input_adapter, const parser_callback_t)
+    @brief generate SAX events
+
+    The SAX event lister must follow the interface of @ref json_sax.
+
+    This function reads from a compatible input. Examples are:
+    - an array of 1-byte values
+    - strings with character/literal type with size of 1 byte
+    - input streams
+    - container with contiguous storage of 1-byte values. Compatible container
+      types include `std::vector`, `std::string`, `std::array`,
+      `std::valarray`, and `std::initializer_list`. Furthermore, C-style
+      arrays can be used with `std::begin()`/`std::end()`. User-defined
+      containers can be used as long as they implement random-access iterators
+      and a contiguous storage.
+
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @pre The container storage is contiguous. Violating this precondition
+    yields undefined behavior. **This precondition is enforced with an
+    assertion.**
+    @pre Each element of the container has a size of 1 byte. Violating this
+    precondition yields undefined behavior. **This precondition is enforced
+    with a static assertion.**
+
+    @warning There is no way to enforce all preconditions at compile-time. If
+             the function is called with a noncompliant container and with
+             assertions switched off, the behavior is undefined and will most
+             likely yield segmentation violation.
+
+    @param[in] i  input to read from
+    @param[in,out] sax  SAX event listener
+    @param[in] format  the format to parse (JSON, CBOR, MessagePack, or UBJSON)
+    @param[in] strict  whether the input has to be consumed completely
+
+    @return return value of the last processed SAX event
+
+    @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+    of input; expected string literal""`
+    @throw parse_error.102 if to_unicode fails or surrogate error
+    @throw parse_error.103 if to_unicode fails
+
+    @complexity Linear in the length of the input. The parser is a predictive
+    LL(1) parser. The complexity can be higher if the SAX consumer @a sax has
+    a super-linear complexity.
+
+    @note A UTF-8 byte order mark is silently ignored.
+
+    @liveexample{The example below demonstrates the `sax_parse()` function
+    reading from string and processing the events with a user-defined SAX
+    event consumer.,sax_parse}
+
+    @since version 3.2.0
     */
-    static basic_json parse(detail::input_adapter& i,
-                            const parser_callback_t cb = nullptr,
-                            const bool allow_exceptions = true)
+    template <typename SAX>
+    static bool sax_parse(detail::input_adapter&& i, SAX* sax,
+                          input_format_t format = input_format_t::json,
+                          const bool strict = true)
     {
-        basic_json result;
-        parser(i, cb, allow_exceptions).parse(true, result);
-        return result;
-    }
-
-    static bool accept(detail::input_adapter i)
-    {
-        return parser(i).accept(true);
-    }
-
-    static bool accept(detail::input_adapter& i)
-    {
-        return parser(i).accept(true);
+        assert(sax);
+        switch (format)
+        {
+            case input_format_t::json:
+                return parser(std::move(i)).sax_parse(sax, strict);
+            default:
+                return detail::binary_reader<basic_json, SAX>(std::move(i)).sax_parse(format, sax, strict);
+        }
     }
 
     /*!
@@ -15702,6 +17260,15 @@ class basic_json
         return parser(detail::input_adapter(first, last)).accept(true);
     }
 
+    template<class IteratorType, class SAX, typename std::enable_if<
+                 std::is_base_of<
+                     std::random_access_iterator_tag,
+                     typename std::iterator_traits<IteratorType>::iterator_category>::value, int>::type = 0>
+    static bool sax_parse(IteratorType first, IteratorType last, SAX* sax)
+    {
+        return parser(detail::input_adapter(first, last)).sax_parse(sax);
+    }
+
     /*!
     @brief deserialize from stream
     @deprecated This stream operator is deprecated and will be removed in
@@ -16198,6 +17765,9 @@ class basic_json
     @param[in] i  an input in CBOR format convertible to an input adapter
     @param[in] strict  whether to expect the input to be consumed until EOF
                        (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
     @return deserialized JSON value
 
     @throw parse_error.110 if the given input ends prematurely or the end of
@@ -16213,29 +17783,39 @@ class basic_json
 
     @sa http://cbor.io
     @sa @ref to_cbor(const basic_json&) for the analogous serialization
-    @sa @ref from_msgpack(detail::input_adapter, const bool) for the
+    @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for the
         related MessagePack format
-    @sa @ref from_ubjson(detail::input_adapter, const bool) for the related
-        UBJSON format
+    @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for the
+        related UBJSON format
 
     @since version 2.0.9; parameter @a start_index since 2.1.1; changed to
            consume input adapters, removed start_index parameter, and added
-           @a strict parameter since 3.0.0
+           @a strict parameter since 3.0.0; added @allow_exceptions parameter
+           since 3.2.0
     */
-    static basic_json from_cbor(detail::input_adapter i,
-                                const bool strict = true)
+    static basic_json from_cbor(detail::input_adapter&& i,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
     {
-        return binary_reader(i).parse_cbor(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::cbor, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
-    @copydoc from_cbor(detail::input_adapter, const bool)
+    @copydoc from_cbor(detail::input_adapter, const bool, const bool)
     */
     template<typename A1, typename A2,
              detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
-    static basic_json from_cbor(A1 && a1, A2 && a2, const bool strict = true)
+    static basic_json from_cbor(A1 && a1, A2 && a2,
+                                const bool strict = true,
+                                const bool allow_exceptions = true)
     {
-        return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_cbor(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).sax_parse(input_format_t::cbor, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
@@ -16288,6 +17868,10 @@ class basic_json
                   adapter
     @param[in] strict  whether to expect the input to be consumed until EOF
                        (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value
 
     @throw parse_error.110 if the given input ends prematurely or the end of
     file was not reached when @a strict was set to true
@@ -16302,29 +17886,39 @@ class basic_json
 
     @sa http://msgpack.org
     @sa @ref to_msgpack(const basic_json&) for the analogous serialization
-    @sa @ref from_cbor(detail::input_adapter, const bool) for the related CBOR
-        format
-    @sa @ref from_ubjson(detail::input_adapter, const bool) for the related
-        UBJSON format
+    @sa @ref from_cbor(detail::input_adapter, const bool, const bool) for the
+        related CBOR format
+    @sa @ref from_ubjson(detail::input_adapter, const bool, const bool) for
+        the related UBJSON format
 
     @since version 2.0.9; parameter @a start_index since 2.1.1; changed to
            consume input adapters, removed start_index parameter, and added
-           @a strict parameter since 3.0.0
+           @a strict parameter since 3.0.0; added @allow_exceptions parameter
+           since 3.2.0
     */
-    static basic_json from_msgpack(detail::input_adapter i,
-                                   const bool strict = true)
+    static basic_json from_msgpack(detail::input_adapter&& i,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
     {
-        return binary_reader(i).parse_msgpack(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
-    @copydoc from_msgpack(detail::input_adapter, const bool)
+    @copydoc from_msgpack(detail::input_adapter, const bool, const bool)
     */
     template<typename A1, typename A2,
              detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
-    static basic_json from_msgpack(A1 && a1, A2 && a2, const bool strict = true)
+    static basic_json from_msgpack(A1 && a1, A2 && a2,
+                                   const bool strict = true,
+                                   const bool allow_exceptions = true)
     {
-        return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_msgpack(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).sax_parse(input_format_t::msgpack, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /*!
@@ -16359,6 +17953,10 @@ class basic_json
     @param[in] i  an input in UBJSON format convertible to an input adapter
     @param[in] strict  whether to expect the input to be consumed until EOF
                        (true by default)
+    @param[in] allow_exceptions  whether to throw exceptions in case of a
+    parse error (optional, true by default)
+
+    @return deserialized JSON value
 
     @throw parse_error.110 if the given input ends prematurely or the end of
     file was not reached when @a strict was set to true
@@ -16373,24 +17971,36 @@ class basic_json
     @sa http://ubjson.org
     @sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
              analogous serialization
-    @sa @ref from_cbor(detail::input_adapter, const bool) for the related CBOR
-        format
-    @sa @ref from_msgpack(detail::input_adapter, const bool) for the related
-        MessagePack format
+    @sa @ref from_cbor(detail::input_adapter, const bool, const bool) for the
+        related CBOR format
+    @sa @ref from_msgpack(detail::input_adapter, const bool, const bool) for
+        the related MessagePack format
 
-    @since version 3.1.0
+    @since version 3.1.0; added @allow_exceptions parameter since 3.2.0
     */
-    static basic_json from_ubjson(detail::input_adapter i,
-                                  const bool strict = true)
+    static basic_json from_ubjson(detail::input_adapter&& i,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
     {
-        return binary_reader(i).parse_ubjson(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(i)).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
+    /*!
+    @copydoc from_ubjson(detail::input_adapter, const bool, const bool)
+    */
     template<typename A1, typename A2,
              detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
-    static basic_json from_ubjson(A1 && a1, A2 && a2, const bool strict = true)
+    static basic_json from_ubjson(A1 && a1, A2 && a2,
+                                  const bool strict = true,
+                                  const bool allow_exceptions = true)
     {
-        return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_ubjson(strict);
+        basic_json result;
+        detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+        const bool res = binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).sax_parse(input_format_t::ubjson, &sdp, strict);
+        return res ? result : basic_json(value_t::discarded);
     }
 
     /// @}
@@ -16767,11 +18377,13 @@ class basic_json
                         break;
                     }
 
+                    // LCOV_EXCL_START
                     default:
                     {
                         // if there exists a parent it cannot be primitive
-                        assert(false);  // LCOV_EXCL_LINE
+                        assert(false);
                     }
+                        // LCOV_EXCL_STOP
                 }
             }
         };
@@ -16913,7 +18525,7 @@ class basic_json
                         // the "path" location must exist - use at()
                         success = (result.at(ptr) == get_value("test", "value", false));
                     }
-                    JSON_CATCH (out_of_range&)
+                    JSON_INTERNAL_CATCH (out_of_range&)
                     {
                         // ignore out of range errors: success remains false
                     }
@@ -17191,11 +18803,10 @@ namespace std
 @since version 1.0.0
 */
 template<>
-inline void swap(nlohmann::json& j1,
-                 nlohmann::json& j2) noexcept(
-                     is_nothrow_move_constructible<nlohmann::json>::value and
-                     is_nothrow_move_assignable<nlohmann::json>::value
-                 )
+inline void swap<nlohmann::json>(nlohmann::json& j1, nlohmann::json& j2) noexcept(
+    is_nothrow_move_constructible<nlohmann::json>::value and
+    is_nothrow_move_assignable<nlohmann::json>::value
+)
 {
     j1.swap(j2);
 }
@@ -17284,6 +18895,7 @@ inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std
 #endif
 
 // clean up
+#undef JSON_INTERNAL_CATCH
 #undef JSON_CATCH
 #undef JSON_THROW
 #undef JSON_TRY
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index e5f6dc55..c0f40728 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -6,15 +6,14 @@ option(JSON_Coverage "Build test suite with coverage information" OFF)
 if(JSON_Sanitizer)
     message(STATUS "Building test suite with Clang sanitizer")
     if(NOT MSVC)
-        set(CMAKE_CXX_FLAGS "-std=c++11 -g -O2 -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer")
+        set(CMAKE_CXX_FLAGS "-g -O2 -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer")
     endif()
 endif()
 
 if(JSON_Valgrind)
     find_program(CMAKE_MEMORYCHECK_COMMAND valgrind)
     message(STATUS "Executing test suite with Valgrind (${CMAKE_MEMORYCHECK_COMMAND})")
-    set(MEMORYCHECK_COMMAND_OPTIONS "--error-exitcode=1 --leak-check=full")
-    set(memcheck_command "${CMAKE_MEMORYCHECK_COMMAND} ${CMAKE_MEMORYCHECK_COMMAND_OPTIONS}")
+    set(memcheck_command "${CMAKE_MEMORYCHECK_COMMAND} ${CMAKE_MEMORYCHECK_COMMAND_OPTIONS} --error-exitcode=1 --leak-check=full")
     separate_arguments(memcheck_command)
 endif()
 
@@ -62,11 +61,10 @@ add_library(catch_main OBJECT
     "src/unit.cpp"
 )
 set_target_properties(catch_main PROPERTIES
-    CXX_STANDARD 11
-    CXX_STANDARD_REQUIRED ON
     COMPILE_DEFINITIONS "$<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>"
     COMPILE_OPTIONS "$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>"
 )
+target_compile_features(catch_main PUBLIC cxx_std_11)
 target_include_directories(catch_main PRIVATE "thirdparty/catch")
 
 # https://stackoverflow.com/questions/2368811/how-to-set-warning-level-in-cmake
@@ -83,6 +81,9 @@ if(MSVC)
 	# Disable warning C4566: character represented by universal-character-name '\uFF01' cannot be represented in the current code page (1252)
 	# Disable warning C4996: 'nlohmann::basic_json<std::map,std::vector,std::string,bool,int64_t,uint64_t,double,std::allocator,nlohmann::adl_serializer>::operator <<': was declared deprecated
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4389 /wd4309 /wd4566 /wd4996")
+	
+	# https://github.com/nlohmann/json/issues/1114
+	set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /bigobj")
 endif()
 
 #############################################################################
@@ -96,13 +97,12 @@ foreach(file ${files})
 
     add_executable(${testcase} $<TARGET_OBJECTS:catch_main> ${file})
     set_target_properties(${testcase} PROPERTIES
-        CXX_STANDARD 11
-        CXX_STANDARD_REQUIRED ON
         COMPILE_DEFINITIONS "$<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>"
         COMPILE_OPTIONS "$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>"
     )
 
     target_compile_definitions(${testcase} PRIVATE CATCH_CONFIG_FAST_COMPILE)
+    target_compile_features(${testcase} PRIVATE cxx_std_11)
     target_include_directories(${testcase} PRIVATE "thirdparty/catch")
     target_include_directories(${testcase} PRIVATE "thirdparty/fifo_map")
     target_include_directories(${testcase} PRIVATE ${NLOHMANN_JSON_INCLUDE_BUILD_DIR})
diff --git a/test/Makefile b/test/Makefile
index f373451f..afbb1ba5 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -42,7 +42,8 @@ SOURCES = src/unit.cpp \
           src/unit-serialization.cpp \
           src/unit-testsuites.cpp \
           src/unit-ubjson.cpp \
-          src/unit-unicode.cpp
+          src/unit-unicode.cpp \
+          src/unit-wstring.cpp
 
 OBJECTS = $(SOURCES:.cpp=.o)
 
diff --git a/test/data/nst_json_testsuite2/LICENSE b/test/data/nst_json_testsuite2/LICENSE
new file mode 100644
index 00000000..c4b3621d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016 Nicolas Seriot
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/test/data/nst_json_testsuite2/README.md b/test/data/nst_json_testsuite2/README.md
new file mode 100644
index 00000000..775ccfd6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/README.md
@@ -0,0 +1,55 @@
+# JSON Parsing Test Suite
+A comprehensive test suite for RFC 8259 compliant JSON parsers
+
+This repository was created as an appendix to the article [Parsing JSON is a Minefield 💣](http://seriot.ch/parsing_json.php).
+
+**/parsers/**
+
+This directory contains several parsers and tiny wrappers to turn the parsers into JSON validators, by returning a specific value.
+
+- `0` the parser did accept the content
+- `1` the parser did reject the content
+- `>1` the process did crash
+- `timeout` happens after 5 seconds
+
+**/test\_parsing/**
+
+The name of these files tell if their contents should be accepted or rejected.
+
+- `y_` content must be accepted by parsers
+- `n_` content must be rejected by parsers
+- `i_` parsers are free to accept or reject content
+
+**/test\_transform/**
+
+These files contain weird structures and characters that parsers may understand differently, eg:
+
+- huge numbers
+- dictionaries with similar keys
+- NULL characters
+- escaped invalid strings
+
+These files were used to produce `results/transform.html`.
+
+**/run_tests.py**
+
+Run all parsers with all files:
+
+    $ python3 run_tests.py
+
+Run all parsers with a specific file:
+
+    $ python3 run_tests.py file.json
+
+Run specific parsers with all files:
+
+    $ echo '["Python 2.7.10", "Python 3.5.2"]' > python_only.json
+    $ python3 run_tests.py --filter=python_only.json
+
+The script writes logs in `results/logs.txt`.
+
+The script then reads `logs.txt` and generates `results/parsing.html`.
+
+**/results/**
+
+<img src="results/pruned_results.png" alt="JSON Parsing Tests" />
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_double_huge_neg_exp.json b/test/data/nst_json_testsuite2/test_parsing/i_number_double_huge_neg_exp.json
new file mode 100644
index 00000000..ae4c7b71
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_double_huge_neg_exp.json
@@ -0,0 +1 @@
+[123.456e-789]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_huge_exp.json b/test/data/nst_json_testsuite2/test_parsing/i_number_huge_exp.json
new file mode 100644
index 00000000..9b5efa23
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_huge_exp.json
@@ -0,0 +1 @@
+[0.4e00669999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999969999999006]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_neg_int_huge_exp.json b/test/data/nst_json_testsuite2/test_parsing/i_number_neg_int_huge_exp.json
new file mode 100755
index 00000000..3abd58a5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_neg_int_huge_exp.json
@@ -0,0 +1 @@
+[-1e+9999]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_pos_double_huge_exp.json b/test/data/nst_json_testsuite2/test_parsing/i_number_pos_double_huge_exp.json
new file mode 100755
index 00000000..e10a7eb6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_pos_double_huge_exp.json
@@ -0,0 +1 @@
+[1.5e+9999]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_real_neg_overflow.json b/test/data/nst_json_testsuite2/test_parsing/i_number_real_neg_overflow.json
new file mode 100644
index 00000000..3d628a99
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_real_neg_overflow.json
@@ -0,0 +1 @@
+[-123123e100000]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_real_pos_overflow.json b/test/data/nst_json_testsuite2/test_parsing/i_number_real_pos_overflow.json
new file mode 100644
index 00000000..54d7d3dc
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_real_pos_overflow.json
@@ -0,0 +1 @@
+[123123e100000]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_real_underflow.json b/test/data/nst_json_testsuite2/test_parsing/i_number_real_underflow.json
new file mode 100644
index 00000000..c5236eb2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_real_underflow.json
@@ -0,0 +1 @@
+[123e-10000000]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_too_big_neg_int.json b/test/data/nst_json_testsuite2/test_parsing/i_number_too_big_neg_int.json
new file mode 100644
index 00000000..dfa38461
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_too_big_neg_int.json
@@ -0,0 +1 @@
+[-123123123123123123123123123123]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_too_big_pos_int.json b/test/data/nst_json_testsuite2/test_parsing/i_number_too_big_pos_int.json
new file mode 100644
index 00000000..338a8c3c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_too_big_pos_int.json
@@ -0,0 +1 @@
+[100000000000000000000]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_number_very_big_negative_int.json b/test/data/nst_json_testsuite2/test_parsing/i_number_very_big_negative_int.json
new file mode 100755
index 00000000..e2d9738c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_number_very_big_negative_int.json
@@ -0,0 +1 @@
+[-237462374673276894279832749832423479823246327846]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_object_key_lone_2nd_surrogate.json b/test/data/nst_json_testsuite2/test_parsing/i_object_key_lone_2nd_surrogate.json
new file mode 100644
index 00000000..5be7ebaf
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_object_key_lone_2nd_surrogate.json
@@ -0,0 +1 @@
+{"\uDFAA":0}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_1st_surrogate_but_2nd_missing.json b/test/data/nst_json_testsuite2/test_parsing/i_string_1st_surrogate_but_2nd_missing.json
new file mode 100644
index 00000000..3b9e37c6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_1st_surrogate_but_2nd_missing.json
@@ -0,0 +1 @@
+["\uDADA"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_1st_valid_surrogate_2nd_invalid.json b/test/data/nst_json_testsuite2/test_parsing/i_string_1st_valid_surrogate_2nd_invalid.json
new file mode 100644
index 00000000..48759283
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_1st_valid_surrogate_2nd_invalid.json
@@ -0,0 +1 @@
+["\uD888\u1234"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_UTF-16LE_with_BOM.json b/test/data/nst_json_testsuite2/test_parsing/i_string_UTF-16LE_with_BOM.json
new file mode 100644
index 00000000..2a79c062
Binary files /dev/null and b/test/data/nst_json_testsuite2/test_parsing/i_string_UTF-16LE_with_BOM.json differ
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_UTF-8_invalid_sequence.json b/test/data/nst_json_testsuite2/test_parsing/i_string_UTF-8_invalid_sequence.json
new file mode 100755
index 00000000..e2a968a1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_UTF-8_invalid_sequence.json
@@ -0,0 +1 @@
+["日ш�"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_UTF8_surrogate_U+D800.json b/test/data/nst_json_testsuite2/test_parsing/i_string_UTF8_surrogate_U+D800.json
new file mode 100644
index 00000000..916bff92
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_UTF8_surrogate_U+D800.json
@@ -0,0 +1 @@
+["���"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_and_escape_valid.json b/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_and_escape_valid.json
new file mode 100755
index 00000000..3cb11d22
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_and_escape_valid.json
@@ -0,0 +1 @@
+["\uD800\n"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_pair.json b/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_pair.json
new file mode 100755
index 00000000..38ec23bb
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_pair.json
@@ -0,0 +1 @@
+["\uDd1ea"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogates_escape_valid.json b/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogates_escape_valid.json
new file mode 100755
index 00000000..c9cd6f6c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogates_escape_valid.json
@@ -0,0 +1 @@
+["\uD800\uD800\n"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_lonely_surrogate.json b/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_lonely_surrogate.json
new file mode 100755
index 00000000..3abbd8d8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_lonely_surrogate.json
@@ -0,0 +1 @@
+["\ud800"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_surrogate.json b/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_surrogate.json
new file mode 100755
index 00000000..ffddc04f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_surrogate.json
@@ -0,0 +1 @@
+["\ud800abc"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_utf-8.json b/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_utf-8.json
new file mode 100644
index 00000000..8e45a7ec
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_invalid_utf-8.json
@@ -0,0 +1 @@
+["�"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_inverted_surrogates_U+1D11E.json b/test/data/nst_json_testsuite2/test_parsing/i_string_inverted_surrogates_U+1D11E.json
new file mode 100755
index 00000000..0d5456cc
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_inverted_surrogates_U+1D11E.json
@@ -0,0 +1 @@
+["\uDd1e\uD834"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_iso_latin_1.json b/test/data/nst_json_testsuite2/test_parsing/i_string_iso_latin_1.json
new file mode 100644
index 00000000..9389c982
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_iso_latin_1.json
@@ -0,0 +1 @@
+["�"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_lone_second_surrogate.json b/test/data/nst_json_testsuite2/test_parsing/i_string_lone_second_surrogate.json
new file mode 100644
index 00000000..1dbd397f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_lone_second_surrogate.json
@@ -0,0 +1 @@
+["\uDFAA"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_lone_utf8_continuation_byte.json b/test/data/nst_json_testsuite2/test_parsing/i_string_lone_utf8_continuation_byte.json
new file mode 100644
index 00000000..729337c0
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_lone_utf8_continuation_byte.json
@@ -0,0 +1 @@
+["�"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_not_in_unicode_range.json b/test/data/nst_json_testsuite2/test_parsing/i_string_not_in_unicode_range.json
new file mode 100644
index 00000000..df90a291
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_not_in_unicode_range.json
@@ -0,0 +1 @@
+["����"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_2_bytes.json b/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_2_bytes.json
new file mode 100644
index 00000000..c8cee5e0
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_2_bytes.json
@@ -0,0 +1 @@
+["��"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes.json b/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes.json
new file mode 100755
index 00000000..9a91da79
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes.json
@@ -0,0 +1 @@
+["������"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes_null.json b/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes_null.json
new file mode 100755
index 00000000..d24fffdd
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes_null.json
@@ -0,0 +1 @@
+["������"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_truncated-utf-8.json b/test/data/nst_json_testsuite2/test_parsing/i_string_truncated-utf-8.json
new file mode 100644
index 00000000..63c7777f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_string_truncated-utf-8.json
@@ -0,0 +1 @@
+["��"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_utf16BE_no_BOM.json b/test/data/nst_json_testsuite2/test_parsing/i_string_utf16BE_no_BOM.json
new file mode 100644
index 00000000..57e5392f
Binary files /dev/null and b/test/data/nst_json_testsuite2/test_parsing/i_string_utf16BE_no_BOM.json differ
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_string_utf16LE_no_BOM.json b/test/data/nst_json_testsuite2/test_parsing/i_string_utf16LE_no_BOM.json
new file mode 100644
index 00000000..c49c1b25
Binary files /dev/null and b/test/data/nst_json_testsuite2/test_parsing/i_string_utf16LE_no_BOM.json differ
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_structure_500_nested_arrays.json b/test/data/nst_json_testsuite2/test_parsing/i_structure_500_nested_arrays.json
new file mode 100644
index 00000000..71184058
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_structure_500_nested_arrays.json
@@ -0,0 +1 @@
+[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/i_structure_UTF-8_BOM_empty_object.json b/test/data/nst_json_testsuite2/test_parsing/i_structure_UTF-8_BOM_empty_object.json
new file mode 100755
index 00000000..22fdca1b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/i_structure_UTF-8_BOM_empty_object.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_1_true_without_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_1_true_without_comma.json
new file mode 100644
index 00000000..c14e3f6b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_1_true_without_comma.json
@@ -0,0 +1 @@
+[1 true]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_a_invalid_utf8.json b/test/data/nst_json_testsuite2/test_parsing/n_array_a_invalid_utf8.json
new file mode 100644
index 00000000..38a86e2e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_a_invalid_utf8.json
@@ -0,0 +1 @@
+[a�]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_colon_instead_of_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_colon_instead_of_comma.json
new file mode 100644
index 00000000..0d02ad44
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_colon_instead_of_comma.json
@@ -0,0 +1 @@
+["": 1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_comma_after_close.json b/test/data/nst_json_testsuite2/test_parsing/n_array_comma_after_close.json
new file mode 100644
index 00000000..2ccba8d9
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_comma_after_close.json
@@ -0,0 +1 @@
+[""],
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_comma_and_number.json b/test/data/nst_json_testsuite2/test_parsing/n_array_comma_and_number.json
new file mode 100755
index 00000000..d2c84e37
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_comma_and_number.json
@@ -0,0 +1 @@
+[,1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_double_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_double_comma.json
new file mode 100755
index 00000000..0431712b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_double_comma.json
@@ -0,0 +1 @@
+[1,,2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_double_extra_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_double_extra_comma.json
new file mode 100644
index 00000000..3f01d312
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_double_extra_comma.json
@@ -0,0 +1 @@
+["x",,]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_extra_close.json b/test/data/nst_json_testsuite2/test_parsing/n_array_extra_close.json
new file mode 100644
index 00000000..c12f9fae
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_extra_close.json
@@ -0,0 +1 @@
+["x"]]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_extra_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_extra_comma.json
new file mode 100644
index 00000000..5f8ce18e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_extra_comma.json
@@ -0,0 +1 @@
+["",]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_incomplete.json b/test/data/nst_json_testsuite2/test_parsing/n_array_incomplete.json
new file mode 100644
index 00000000..cc65b0b5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_incomplete.json
@@ -0,0 +1 @@
+["x"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_incomplete_invalid_value.json b/test/data/nst_json_testsuite2/test_parsing/n_array_incomplete_invalid_value.json
new file mode 100644
index 00000000..c21a8f6c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_incomplete_invalid_value.json
@@ -0,0 +1 @@
+[x
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_inner_array_no_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_inner_array_no_comma.json
new file mode 100644
index 00000000..c70b7164
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_inner_array_no_comma.json
@@ -0,0 +1 @@
+[3[4]]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_invalid_utf8.json b/test/data/nst_json_testsuite2/test_parsing/n_array_invalid_utf8.json
new file mode 100644
index 00000000..6099d344
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_invalid_utf8.json
@@ -0,0 +1 @@
+[�]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_items_separated_by_semicolon.json b/test/data/nst_json_testsuite2/test_parsing/n_array_items_separated_by_semicolon.json
new file mode 100755
index 00000000..d4bd7314
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_items_separated_by_semicolon.json
@@ -0,0 +1 @@
+[1:2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_just_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_just_comma.json
new file mode 100755
index 00000000..9d7077c6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_just_comma.json
@@ -0,0 +1 @@
+[,]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_just_minus.json b/test/data/nst_json_testsuite2/test_parsing/n_array_just_minus.json
new file mode 100755
index 00000000..29501c6c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_just_minus.json
@@ -0,0 +1 @@
+[-]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_missing_value.json b/test/data/nst_json_testsuite2/test_parsing/n_array_missing_value.json
new file mode 100644
index 00000000..3a6ba86f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_missing_value.json
@@ -0,0 +1 @@
+[   , ""]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_newlines_unclosed.json b/test/data/nst_json_testsuite2/test_parsing/n_array_newlines_unclosed.json
new file mode 100644
index 00000000..64668006
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_newlines_unclosed.json
@@ -0,0 +1,3 @@
+["a",
+4
+,1,
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_number_and_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_number_and_comma.json
new file mode 100755
index 00000000..13f6f1d1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_number_and_comma.json
@@ -0,0 +1 @@
+[1,]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_number_and_several_commas.json b/test/data/nst_json_testsuite2/test_parsing/n_array_number_and_several_commas.json
new file mode 100755
index 00000000..0ac408cb
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_number_and_several_commas.json
@@ -0,0 +1 @@
+[1,,]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_spaces_vertical_tab_formfeed.json b/test/data/nst_json_testsuite2/test_parsing/n_array_spaces_vertical_tab_formfeed.json
new file mode 100755
index 00000000..6cd7cf58
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_spaces_vertical_tab_formfeed.json
@@ -0,0 +1 @@
+["a"\f]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_star_inside.json b/test/data/nst_json_testsuite2/test_parsing/n_array_star_inside.json
new file mode 100755
index 00000000..5a519464
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_star_inside.json
@@ -0,0 +1 @@
+[*]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed.json b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed.json
new file mode 100644
index 00000000..06073305
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed.json
@@ -0,0 +1 @@
+[""
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_trailing_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_trailing_comma.json
new file mode 100644
index 00000000..6604698f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_trailing_comma.json
@@ -0,0 +1 @@
+[1,
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_new_lines.json b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_new_lines.json
new file mode 100644
index 00000000..4f61de3f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_new_lines.json
@@ -0,0 +1,3 @@
+[1,
+1
+,1
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_object_inside.json b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_object_inside.json
new file mode 100644
index 00000000..043a87e2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_object_inside.json
@@ -0,0 +1 @@
+[{}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_incomplete_false.json b/test/data/nst_json_testsuite2/test_parsing/n_incomplete_false.json
new file mode 100644
index 00000000..eb18c6a1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_incomplete_false.json
@@ -0,0 +1 @@
+[fals]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_incomplete_null.json b/test/data/nst_json_testsuite2/test_parsing/n_incomplete_null.json
new file mode 100644
index 00000000..c18ef538
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_incomplete_null.json
@@ -0,0 +1 @@
+[nul]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_incomplete_true.json b/test/data/nst_json_testsuite2/test_parsing/n_incomplete_true.json
new file mode 100644
index 00000000..f451ac6d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_incomplete_true.json
@@ -0,0 +1 @@
+[tru]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_multidigit_number_then_00.json b/test/data/nst_json_testsuite2/test_parsing/n_multidigit_number_then_00.json
new file mode 100644
index 00000000..c22507b8
Binary files /dev/null and b/test/data/nst_json_testsuite2/test_parsing/n_multidigit_number_then_00.json differ
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_++.json b/test/data/nst_json_testsuite2/test_parsing/n_number_++.json
new file mode 100644
index 00000000..bdb62aaf
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_++.json
@@ -0,0 +1 @@
+[++1234]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_+1.json b/test/data/nst_json_testsuite2/test_parsing/n_number_+1.json
new file mode 100755
index 00000000..3cbe58c9
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_+1.json
@@ -0,0 +1 @@
+[+1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_+Inf.json b/test/data/nst_json_testsuite2/test_parsing/n_number_+Inf.json
new file mode 100755
index 00000000..871ae14d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_+Inf.json
@@ -0,0 +1 @@
+[+Inf]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_-01.json b/test/data/nst_json_testsuite2/test_parsing/n_number_-01.json
new file mode 100755
index 00000000..0df32bac
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_-01.json
@@ -0,0 +1 @@
+[-01]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_-1.0..json b/test/data/nst_json_testsuite2/test_parsing/n_number_-1.0..json
new file mode 100755
index 00000000..7cf55a85
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_-1.0..json
@@ -0,0 +1 @@
+[-1.0.]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_-2..json b/test/data/nst_json_testsuite2/test_parsing/n_number_-2..json
new file mode 100755
index 00000000..9be84365
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_-2..json
@@ -0,0 +1 @@
+[-2.]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_-NaN.json b/test/data/nst_json_testsuite2/test_parsing/n_number_-NaN.json
new file mode 100755
index 00000000..f61615d4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_-NaN.json
@@ -0,0 +1 @@
+[-NaN]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_.-1.json b/test/data/nst_json_testsuite2/test_parsing/n_number_.-1.json
new file mode 100644
index 00000000..1c9f2dd1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_.-1.json
@@ -0,0 +1 @@
+[.-1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_.2e-3.json b/test/data/nst_json_testsuite2/test_parsing/n_number_.2e-3.json
new file mode 100755
index 00000000..c6c976f2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_.2e-3.json
@@ -0,0 +1 @@
+[.2e-3]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0.1.2.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0.1.2.json
new file mode 100755
index 00000000..c83a2562
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0.1.2.json
@@ -0,0 +1 @@
+[0.1.2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0.3e+.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0.3e+.json
new file mode 100644
index 00000000..a55a1bfe
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0.3e+.json
@@ -0,0 +1 @@
+[0.3e+]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0.3e.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0.3e.json
new file mode 100644
index 00000000..3dd5df4b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0.3e.json
@@ -0,0 +1 @@
+[0.3e]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0.e1.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0.e1.json
new file mode 100644
index 00000000..c92c71cc
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0.e1.json
@@ -0,0 +1 @@
+[0.e1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E+.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E+.json
new file mode 100644
index 00000000..3ba2c7d6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E+.json
@@ -0,0 +1 @@
+[0E+]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E.json
new file mode 100755
index 00000000..5301840d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E.json
@@ -0,0 +1 @@
+[0E]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0e+.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0e+.json
new file mode 100644
index 00000000..8ab0bc4b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0e+.json
@@ -0,0 +1 @@
+[0e+]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_0e.json b/test/data/nst_json_testsuite2/test_parsing/n_number_0e.json
new file mode 100644
index 00000000..47ec421b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_0e.json
@@ -0,0 +1 @@
+[0e]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e+.json b/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e+.json
new file mode 100755
index 00000000..cd84b9f6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e+.json
@@ -0,0 +1 @@
+[1.0e+]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e-.json b/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e-.json
new file mode 100755
index 00000000..4eb7afa0
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e-.json
@@ -0,0 +1 @@
+[1.0e-]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e.json b/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e.json
new file mode 100755
index 00000000..21753f4c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_1.0e.json
@@ -0,0 +1 @@
+[1.0e]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_1_000.json b/test/data/nst_json_testsuite2/test_parsing/n_number_1_000.json
new file mode 100755
index 00000000..7b18b66b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_1_000.json
@@ -0,0 +1 @@
+[1 000.0]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_1eE2.json b/test/data/nst_json_testsuite2/test_parsing/n_number_1eE2.json
new file mode 100755
index 00000000..4318a341
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_1eE2.json
@@ -0,0 +1 @@
+[1eE2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_2.e+3.json b/test/data/nst_json_testsuite2/test_parsing/n_number_2.e+3.json
new file mode 100755
index 00000000..4442f394
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_2.e+3.json
@@ -0,0 +1 @@
+[2.e+3]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_2.e-3.json b/test/data/nst_json_testsuite2/test_parsing/n_number_2.e-3.json
new file mode 100755
index 00000000..a65060ed
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_2.e-3.json
@@ -0,0 +1 @@
+[2.e-3]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_2.e3.json b/test/data/nst_json_testsuite2/test_parsing/n_number_2.e3.json
new file mode 100755
index 00000000..66f7cf70
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_2.e3.json
@@ -0,0 +1 @@
+[2.e3]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_9.e+.json b/test/data/nst_json_testsuite2/test_parsing/n_number_9.e+.json
new file mode 100644
index 00000000..732a7b11
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_9.e+.json
@@ -0,0 +1 @@
+[9.e+]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_Inf.json b/test/data/nst_json_testsuite2/test_parsing/n_number_Inf.json
new file mode 100755
index 00000000..c40c734c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_Inf.json
@@ -0,0 +1 @@
+[Inf]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_NaN.json b/test/data/nst_json_testsuite2/test_parsing/n_number_NaN.json
new file mode 100755
index 00000000..49923179
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_NaN.json
@@ -0,0 +1 @@
+[NaN]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_U+FF11_fullwidth_digit_one.json b/test/data/nst_json_testsuite2/test_parsing/n_number_U+FF11_fullwidth_digit_one.json
new file mode 100644
index 00000000..b14587e5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_U+FF11_fullwidth_digit_one.json
@@ -0,0 +1 @@
+[１]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_expression.json b/test/data/nst_json_testsuite2/test_parsing/n_number_expression.json
new file mode 100644
index 00000000..76fdbc8a
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_expression.json
@@ -0,0 +1 @@
+[1+2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_hex_1_digit.json b/test/data/nst_json_testsuite2/test_parsing/n_number_hex_1_digit.json
new file mode 100644
index 00000000..3b214880
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_hex_1_digit.json
@@ -0,0 +1 @@
+[0x1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_hex_2_digits.json b/test/data/nst_json_testsuite2/test_parsing/n_number_hex_2_digits.json
new file mode 100644
index 00000000..83e516ab
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_hex_2_digits.json
@@ -0,0 +1 @@
+[0x42]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_infinity.json b/test/data/nst_json_testsuite2/test_parsing/n_number_infinity.json
new file mode 100755
index 00000000..8c2baf78
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_infinity.json
@@ -0,0 +1 @@
+[Infinity]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_invalid+-.json b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid+-.json
new file mode 100644
index 00000000..1cce602b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid+-.json
@@ -0,0 +1 @@
+[0e+-1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-negative-real.json b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-negative-real.json
new file mode 100644
index 00000000..5fc3c1ef
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-negative-real.json
@@ -0,0 +1 @@
+[-123.123foo]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-bigger-int.json b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-bigger-int.json
new file mode 100644
index 00000000..3b97e580
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-bigger-int.json
@@ -0,0 +1 @@
+[123�]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-exponent.json b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-exponent.json
new file mode 100644
index 00000000..ea35d723
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-exponent.json
@@ -0,0 +1 @@
+[1e1�]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-int.json b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-int.json
new file mode 100644
index 00000000..371226e4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-int.json
@@ -0,0 +1 @@
+[0�]
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_minus_infinity.json b/test/data/nst_json_testsuite2/test_parsing/n_number_minus_infinity.json
new file mode 100755
index 00000000..cf4133d2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_minus_infinity.json
@@ -0,0 +1 @@
+[-Infinity]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_minus_sign_with_trailing_garbage.json b/test/data/nst_json_testsuite2/test_parsing/n_number_minus_sign_with_trailing_garbage.json
new file mode 100644
index 00000000..a6d8e78e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_minus_sign_with_trailing_garbage.json
@@ -0,0 +1 @@
+[-foo]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_minus_space_1.json b/test/data/nst_json_testsuite2/test_parsing/n_number_minus_space_1.json
new file mode 100644
index 00000000..9a5ebedf
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_minus_space_1.json
@@ -0,0 +1 @@
+[- 1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_neg_int_starting_with_zero.json b/test/data/nst_json_testsuite2/test_parsing/n_number_neg_int_starting_with_zero.json
new file mode 100644
index 00000000..67af0960
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_neg_int_starting_with_zero.json
@@ -0,0 +1 @@
+[-012]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_neg_real_without_int_part.json b/test/data/nst_json_testsuite2/test_parsing/n_number_neg_real_without_int_part.json
new file mode 100755
index 00000000..1f2a4349
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_neg_real_without_int_part.json
@@ -0,0 +1 @@
+[-.123]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_neg_with_garbage_at_end.json b/test/data/nst_json_testsuite2/test_parsing/n_number_neg_with_garbage_at_end.json
new file mode 100644
index 00000000..2aa73119
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_neg_with_garbage_at_end.json
@@ -0,0 +1 @@
+[-1x]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_real_garbage_after_e.json b/test/data/nst_json_testsuite2/test_parsing/n_number_real_garbage_after_e.json
new file mode 100644
index 00000000..9213dfca
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_real_garbage_after_e.json
@@ -0,0 +1 @@
+[1ea]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_real_with_invalid_utf8_after_e.json b/test/data/nst_json_testsuite2/test_parsing/n_number_real_with_invalid_utf8_after_e.json
new file mode 100644
index 00000000..1e52ef96
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_real_with_invalid_utf8_after_e.json
@@ -0,0 +1 @@
+[1e�]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_real_without_fractional_part.json b/test/data/nst_json_testsuite2/test_parsing/n_number_real_without_fractional_part.json
new file mode 100755
index 00000000..1de287cf
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_real_without_fractional_part.json
@@ -0,0 +1 @@
+[1.]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_starting_with_dot.json b/test/data/nst_json_testsuite2/test_parsing/n_number_starting_with_dot.json
new file mode 100755
index 00000000..f682dbdc
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_starting_with_dot.json
@@ -0,0 +1 @@
+[.123]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha.json b/test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha.json
new file mode 100644
index 00000000..1e42d818
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha.json
@@ -0,0 +1 @@
+[1.2a-3]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha_char.json b/test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha_char.json
new file mode 100644
index 00000000..b79daccb
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha_char.json
@@ -0,0 +1 @@
+[1.8011670033376514H-308]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_number_with_leading_zero.json b/test/data/nst_json_testsuite2/test_parsing/n_number_with_leading_zero.json
new file mode 100755
index 00000000..7106da1f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_number_with_leading_zero.json
@@ -0,0 +1 @@
+[012]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_bad_value.json b/test/data/nst_json_testsuite2/test_parsing/n_object_bad_value.json
new file mode 100644
index 00000000..a03a8c03
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_bad_value.json
@@ -0,0 +1 @@
+["x", truth]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_bracket_key.json b/test/data/nst_json_testsuite2/test_parsing/n_object_bracket_key.json
new file mode 100644
index 00000000..cc443b48
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_bracket_key.json
@@ -0,0 +1 @@
+{[: "x"}
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_comma_instead_of_colon.json b/test/data/nst_json_testsuite2/test_parsing/n_object_comma_instead_of_colon.json
new file mode 100644
index 00000000..8d563770
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_comma_instead_of_colon.json
@@ -0,0 +1 @@
+{"x", null}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_double_colon.json b/test/data/nst_json_testsuite2/test_parsing/n_object_double_colon.json
new file mode 100644
index 00000000..80e8c7b8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_double_colon.json
@@ -0,0 +1 @@
+{"x"::"b"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_emoji.json b/test/data/nst_json_testsuite2/test_parsing/n_object_emoji.json
new file mode 100644
index 00000000..cb4078ea
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_emoji.json
@@ -0,0 +1 @@
+{🇨🇭}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_garbage_at_end.json b/test/data/nst_json_testsuite2/test_parsing/n_object_garbage_at_end.json
new file mode 100644
index 00000000..80c42cba
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_garbage_at_end.json
@@ -0,0 +1 @@
+{"a":"a" 123}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_key_with_single_quotes.json b/test/data/nst_json_testsuite2/test_parsing/n_object_key_with_single_quotes.json
new file mode 100755
index 00000000..77c32759
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_key_with_single_quotes.json
@@ -0,0 +1 @@
+{key: 'value'}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_lone_continuation_byte_in_key_and_trailing_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_object_lone_continuation_byte_in_key_and_trailing_comma.json
new file mode 100644
index 00000000..aa2cb637
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_lone_continuation_byte_in_key_and_trailing_comma.json
@@ -0,0 +1 @@
+{"�":"0",}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_missing_colon.json b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_colon.json
new file mode 100644
index 00000000..b98eff62
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_colon.json
@@ -0,0 +1 @@
+{"a" b}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_missing_key.json b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_key.json
new file mode 100755
index 00000000..b4fb0f52
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_key.json
@@ -0,0 +1 @@
+{:"b"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_missing_semicolon.json b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_semicolon.json
new file mode 100755
index 00000000..e3451384
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_semicolon.json
@@ -0,0 +1 @@
+{"a" "b"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_missing_value.json b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_value.json
new file mode 100644
index 00000000..3ef538a6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_missing_value.json
@@ -0,0 +1 @@
+{"a":
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_no-colon.json b/test/data/nst_json_testsuite2/test_parsing/n_object_no-colon.json
new file mode 100644
index 00000000..f3797b35
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_no-colon.json
@@ -0,0 +1 @@
+{"a"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key.json b/test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key.json
new file mode 100755
index 00000000..b9945b34
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key.json
@@ -0,0 +1 @@
+{1:1}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key_but_huge_number_instead.json b/test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key_but_huge_number_instead.json
new file mode 100755
index 00000000..b37fa86c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key_but_huge_number_instead.json
@@ -0,0 +1 @@
+{9999E9999:1}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_repeated_null_null.json b/test/data/nst_json_testsuite2/test_parsing/n_object_repeated_null_null.json
new file mode 100755
index 00000000..f7d2959d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_repeated_null_null.json
@@ -0,0 +1 @@
+{null:null,null:null}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_several_trailing_commas.json b/test/data/nst_json_testsuite2/test_parsing/n_object_several_trailing_commas.json
new file mode 100755
index 00000000..3c9afe8d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_several_trailing_commas.json
@@ -0,0 +1 @@
+{"id":0,,,,,}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_single_quote.json b/test/data/nst_json_testsuite2/test_parsing/n_object_single_quote.json
new file mode 100644
index 00000000..e5cdf976
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_single_quote.json
@@ -0,0 +1 @@
+{'a':0}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comma.json
new file mode 100755
index 00000000..a4b02509
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comma.json
@@ -0,0 +1 @@
+{"id":0,}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment.json b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment.json
new file mode 100644
index 00000000..a372c655
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment.json
@@ -0,0 +1 @@
+{"a":"b"}/**/
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_open.json b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_open.json
new file mode 100644
index 00000000..d557f41c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_open.json
@@ -0,0 +1 @@
+{"a":"b"}/**//
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open.json b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open.json
new file mode 100644
index 00000000..e335136c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open.json
@@ -0,0 +1 @@
+{"a":"b"}//
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open_incomplete.json b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open_incomplete.json
new file mode 100644
index 00000000..d892e49f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open_incomplete.json
@@ -0,0 +1 @@
+{"a":"b"}/
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_two_commas_in_a_row.json b/test/data/nst_json_testsuite2/test_parsing/n_object_two_commas_in_a_row.json
new file mode 100755
index 00000000..7c639ae6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_two_commas_in_a_row.json
@@ -0,0 +1 @@
+{"a":"b",,"c":"d"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_unquoted_key.json b/test/data/nst_json_testsuite2/test_parsing/n_object_unquoted_key.json
new file mode 100644
index 00000000..8ba13729
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_unquoted_key.json
@@ -0,0 +1 @@
+{a: "b"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_unterminated-value.json b/test/data/nst_json_testsuite2/test_parsing/n_object_unterminated-value.json
new file mode 100644
index 00000000..7fe699a6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_unterminated-value.json
@@ -0,0 +1 @@
+{"a":"a
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_with_single_string.json b/test/data/nst_json_testsuite2/test_parsing/n_object_with_single_string.json
new file mode 100644
index 00000000..d63f7fbb
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_with_single_string.json
@@ -0,0 +1 @@
+{ "foo" : "bar", "a" }
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_object_with_trailing_garbage.json b/test/data/nst_json_testsuite2/test_parsing/n_object_with_trailing_garbage.json
new file mode 100644
index 00000000..787c8f0a
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_object_with_trailing_garbage.json
@@ -0,0 +1 @@
+{"a":"b"}#
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_single_space.json b/test/data/nst_json_testsuite2/test_parsing/n_single_space.json
new file mode 100755
index 00000000..0519ecba
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_single_space.json
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape.json b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape.json
new file mode 100644
index 00000000..acec66d8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape.json
@@ -0,0 +1 @@
+["\uD800\"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u.json b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u.json
new file mode 100644
index 00000000..e834b05e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u.json
@@ -0,0 +1 @@
+["\uD800\u"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1.json b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1.json
new file mode 100644
index 00000000..a04cd348
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1.json
@@ -0,0 +1 @@
+["\uD800\u1"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1x.json b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1x.json
new file mode 100644
index 00000000..bfbd2340
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1x.json
@@ -0,0 +1 @@
+["\uD800\u1x"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_accentuated_char_no_quotes.json b/test/data/nst_json_testsuite2/test_parsing/n_string_accentuated_char_no_quotes.json
new file mode 100644
index 00000000..fd689569
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_accentuated_char_no_quotes.json
@@ -0,0 +1 @@
+[é]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_backslash_00.json b/test/data/nst_json_testsuite2/test_parsing/n_string_backslash_00.json
new file mode 100644
index 00000000..b5bf267b
Binary files /dev/null and b/test/data/nst_json_testsuite2/test_parsing/n_string_backslash_00.json differ
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_escape_x.json b/test/data/nst_json_testsuite2/test_parsing/n_string_escape_x.json
new file mode 100644
index 00000000..fae29193
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_escape_x.json
@@ -0,0 +1 @@
+["\x00"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_backslash_bad.json b/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_backslash_bad.json
new file mode 100755
index 00000000..016fcb47
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_backslash_bad.json
@@ -0,0 +1 @@
+["\\\"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_ctrl_char_tab.json b/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_ctrl_char_tab.json
new file mode 100644
index 00000000..f35ea382
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_ctrl_char_tab.json
@@ -0,0 +1 @@
+["\	"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_emoji.json b/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_emoji.json
new file mode 100644
index 00000000..a2777542
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_escaped_emoji.json
@@ -0,0 +1 @@
+["\🌀"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escape.json b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escape.json
new file mode 100755
index 00000000..3415c33c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escape.json
@@ -0,0 +1 @@
+["\"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escaped_character.json b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escaped_character.json
new file mode 100755
index 00000000..0f2197ea
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escaped_character.json
@@ -0,0 +1 @@
+["\u00A"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate.json b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate.json
new file mode 100755
index 00000000..75504a65
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate.json
@@ -0,0 +1 @@
+["\uD834\uDd"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate_escape_invalid.json b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate_escape_invalid.json
new file mode 100755
index 00000000..bd965606
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate_escape_invalid.json
@@ -0,0 +1 @@
+["\uD800\uD800\x"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_invalid-utf-8-in-escape.json b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid-utf-8-in-escape.json
new file mode 100644
index 00000000..0c430064
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid-utf-8-in-escape.json
@@ -0,0 +1 @@
+["\u�"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_backslash_esc.json b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_backslash_esc.json
new file mode 100755
index 00000000..d1eb6092
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_backslash_esc.json
@@ -0,0 +1 @@
+["\a"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_unicode_escape.json b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_unicode_escape.json
new file mode 100644
index 00000000..7608cb6b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_unicode_escape.json
@@ -0,0 +1 @@
+["\uqqqq"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_utf8_after_escape.json b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_utf8_after_escape.json
new file mode 100644
index 00000000..2f757a25
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_invalid_utf8_after_escape.json
@@ -0,0 +1 @@
+["\�"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_leading_uescaped_thinspace.json b/test/data/nst_json_testsuite2/test_parsing/n_string_leading_uescaped_thinspace.json
new file mode 100755
index 00000000..7b297c63
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_leading_uescaped_thinspace.json
@@ -0,0 +1 @@
+[\u0020"asd"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_no_quotes_with_bad_escape.json b/test/data/nst_json_testsuite2/test_parsing/n_string_no_quotes_with_bad_escape.json
new file mode 100644
index 00000000..01bc70ab
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_no_quotes_with_bad_escape.json
@@ -0,0 +1 @@
+[\n]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_single_doublequote.json b/test/data/nst_json_testsuite2/test_parsing/n_string_single_doublequote.json
new file mode 100755
index 00000000..9d68933c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_single_doublequote.json
@@ -0,0 +1 @@
+"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_single_quote.json b/test/data/nst_json_testsuite2/test_parsing/n_string_single_quote.json
new file mode 100644
index 00000000..caff239b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_single_quote.json
@@ -0,0 +1 @@
+['single quote']
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_single_string_no_double_quotes.json b/test/data/nst_json_testsuite2/test_parsing/n_string_single_string_no_double_quotes.json
new file mode 100755
index 00000000..f2ba8f84
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_single_string_no_double_quotes.json
@@ -0,0 +1 @@
+abc
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_start_escape_unclosed.json b/test/data/nst_json_testsuite2/test_parsing/n_string_start_escape_unclosed.json
new file mode 100644
index 00000000..db62a46f
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_start_escape_unclosed.json
@@ -0,0 +1 @@
+["\
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_crtl_char.json b/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_crtl_char.json
new file mode 100755
index 00000000..9f213480
Binary files /dev/null and b/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_crtl_char.json differ
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_newline.json b/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_newline.json
new file mode 100644
index 00000000..700d3608
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_newline.json
@@ -0,0 +1,2 @@
+["new
+line"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_tab.json b/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_tab.json
new file mode 100644
index 00000000..160264a2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_tab.json
@@ -0,0 +1 @@
+["	"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_unicode_CapitalU.json b/test/data/nst_json_testsuite2/test_parsing/n_string_unicode_CapitalU.json
new file mode 100644
index 00000000..17332bb1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_unicode_CapitalU.json
@@ -0,0 +1 @@
+"\UA66D"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_string_with_trailing_garbage.json b/test/data/nst_json_testsuite2/test_parsing/n_string_with_trailing_garbage.json
new file mode 100644
index 00000000..efe3bd27
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_string_with_trailing_garbage.json
@@ -0,0 +1 @@
+""x
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_100000_opening_arrays.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_100000_opening_arrays.json
new file mode 100644
index 00000000..a4823eec
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_100000_opening_arrays.json
@@ -0,0 +1 @@
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[
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_U+2060_word_joined.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_U+2060_word_joined.json
new file mode 100644
index 00000000..81156a69
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_U+2060_word_joined.json
@@ -0,0 +1 @@
+[⁠]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_UTF8_BOM_no_data.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_UTF8_BOM_no_data.json
new file mode 100755
index 00000000..5f282702
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_UTF8_BOM_no_data.json
@@ -0,0 +1 @@
+
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_..json b/test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_..json
new file mode 100755
index 00000000..a56fef0b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_..json
@@ -0,0 +1 @@
+<.>
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_null.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_null.json
new file mode 100755
index 00000000..617f2625
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_null.json
@@ -0,0 +1 @@
+[<null>]
\ No newline at end of file
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diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_open_string.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_open_string.json
new file mode 100644
index 00000000..9822a6ba
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_open_string.json
@@ -0,0 +1 @@
+["a
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_string.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_string.json
new file mode 100644
index 00000000..42a61936
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_string.json
@@ -0,0 +1 @@
+["a"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object.json
new file mode 100644
index 00000000..81750b96
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object.json
@@ -0,0 +1 @@
+{
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_close_array.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_close_array.json
new file mode 100755
index 00000000..eebc700a
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_close_array.json
@@ -0,0 +1 @@
+{]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_comma.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_comma.json
new file mode 100644
index 00000000..47bc9106
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_comma.json
@@ -0,0 +1 @@
+{,
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_array.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_array.json
new file mode 100644
index 00000000..381ede5d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_array.json
@@ -0,0 +1 @@
+{[
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_string.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_string.json
new file mode 100644
index 00000000..328c30cd
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_string.json
@@ -0,0 +1 @@
+{"a
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_string_with_apostrophes.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_string_with_apostrophes.json
new file mode 100644
index 00000000..9dba1709
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_string_with_apostrophes.json
@@ -0,0 +1 @@
+{'a'
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_open_open.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_open.json
new file mode 100644
index 00000000..841fd5f8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_open_open.json
@@ -0,0 +1 @@
+["\{["\{["\{["\{
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_single_eacute.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_single_eacute.json
new file mode 100644
index 00000000..92a39f39
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_single_eacute.json
@@ -0,0 +1 @@
+�
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_single_star.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_single_star.json
new file mode 100755
index 00000000..f59ec20a
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_single_star.json
@@ -0,0 +1 @@
+*
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_trailing_#.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_trailing_#.json
new file mode 100644
index 00000000..89861108
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_trailing_#.json
@@ -0,0 +1 @@
+{"a":"b"}#{}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_uescaped_LF_before_string.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_uescaped_LF_before_string.json
new file mode 100755
index 00000000..df2f0f24
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_uescaped_LF_before_string.json
@@ -0,0 +1 @@
+[\u000A""]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array.json
new file mode 100755
index 00000000..11209515
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array.json
@@ -0,0 +1 @@
+[1
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_partial_null.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_partial_null.json
new file mode 100644
index 00000000..0d591762
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_partial_null.json
@@ -0,0 +1 @@
+[ false, nul
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_false.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_false.json
new file mode 100644
index 00000000..a2ff8504
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_false.json
@@ -0,0 +1 @@
+[ true, fals
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_true.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_true.json
new file mode 100644
index 00000000..3149e8f5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_true.json
@@ -0,0 +1 @@
+[ false, tru
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_object.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_object.json
new file mode 100755
index 00000000..694d69db
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_object.json
@@ -0,0 +1 @@
+{"asd":"asd"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_unicode-identifier.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_unicode-identifier.json
new file mode 100644
index 00000000..7284aea3
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_unicode-identifier.json
@@ -0,0 +1 @@
+å
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_U+2060_word_joiner.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_U+2060_word_joiner.json
new file mode 100755
index 00000000..81156a69
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_U+2060_word_joiner.json
@@ -0,0 +1 @@
+[⁠]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_formfeed.json b/test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_formfeed.json
new file mode 100755
index 00000000..a9ea535d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_formfeed.json
@@ -0,0 +1 @@
+[]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_arraysWithSpaces.json b/test/data/nst_json_testsuite2/test_parsing/y_array_arraysWithSpaces.json
new file mode 100755
index 00000000..58229079
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_arraysWithSpaces.json
@@ -0,0 +1 @@
+[[]   ]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_empty-string.json b/test/data/nst_json_testsuite2/test_parsing/y_array_empty-string.json
new file mode 100644
index 00000000..93b6be2b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_empty-string.json
@@ -0,0 +1 @@
+[""]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_empty.json b/test/data/nst_json_testsuite2/test_parsing/y_array_empty.json
new file mode 100755
index 00000000..0637a088
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_empty.json
@@ -0,0 +1 @@
+[]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_ending_with_newline.json b/test/data/nst_json_testsuite2/test_parsing/y_array_ending_with_newline.json
new file mode 100755
index 00000000..eac5f7b4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_ending_with_newline.json
@@ -0,0 +1 @@
+["a"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_false.json b/test/data/nst_json_testsuite2/test_parsing/y_array_false.json
new file mode 100644
index 00000000..67b2f076
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_false.json
@@ -0,0 +1 @@
+[false]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_heterogeneous.json b/test/data/nst_json_testsuite2/test_parsing/y_array_heterogeneous.json
new file mode 100755
index 00000000..d3c1e264
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_heterogeneous.json
@@ -0,0 +1 @@
+[null, 1, "1", {}]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_null.json b/test/data/nst_json_testsuite2/test_parsing/y_array_null.json
new file mode 100644
index 00000000..500db4a8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_null.json
@@ -0,0 +1 @@
+[null]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_with_1_and_newline.json b/test/data/nst_json_testsuite2/test_parsing/y_array_with_1_and_newline.json
new file mode 100644
index 00000000..99482550
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_with_1_and_newline.json
@@ -0,0 +1,2 @@
+[1
+]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_with_leading_space.json b/test/data/nst_json_testsuite2/test_parsing/y_array_with_leading_space.json
new file mode 100755
index 00000000..18bfe642
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_with_leading_space.json
@@ -0,0 +1 @@
+ [1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_with_several_null.json b/test/data/nst_json_testsuite2/test_parsing/y_array_with_several_null.json
new file mode 100755
index 00000000..99f6c5d1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_with_several_null.json
@@ -0,0 +1 @@
+[1,null,null,null,2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_array_with_trailing_space.json b/test/data/nst_json_testsuite2/test_parsing/y_array_with_trailing_space.json
new file mode 100755
index 00000000..de9e7a94
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_array_with_trailing_space.json
@@ -0,0 +1 @@
+[2] 
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number.json b/test/data/nst_json_testsuite2/test_parsing/y_number.json
new file mode 100644
index 00000000..e5f5cc33
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number.json
@@ -0,0 +1 @@
+[123e65]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_0e+1.json b/test/data/nst_json_testsuite2/test_parsing/y_number_0e+1.json
new file mode 100755
index 00000000..d1d39670
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_0e+1.json
@@ -0,0 +1 @@
+[0e+1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_0e1.json b/test/data/nst_json_testsuite2/test_parsing/y_number_0e1.json
new file mode 100755
index 00000000..3283a793
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_0e1.json
@@ -0,0 +1 @@
+[0e1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_after_space.json b/test/data/nst_json_testsuite2/test_parsing/y_number_after_space.json
new file mode 100644
index 00000000..623570d9
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_after_space.json
@@ -0,0 +1 @@
+[ 4]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_double_close_to_zero.json b/test/data/nst_json_testsuite2/test_parsing/y_number_double_close_to_zero.json
new file mode 100755
index 00000000..96555ff7
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_double_close_to_zero.json
@@ -0,0 +1 @@
+[-0.000000000000000000000000000000000000000000000000000000000000000000000000000001]
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_int_with_exp.json b/test/data/nst_json_testsuite2/test_parsing/y_number_int_with_exp.json
new file mode 100755
index 00000000..a4ca9e75
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_int_with_exp.json
@@ -0,0 +1 @@
+[20e1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_minus_zero.json b/test/data/nst_json_testsuite2/test_parsing/y_number_minus_zero.json
new file mode 100755
index 00000000..37af1312
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_minus_zero.json
@@ -0,0 +1 @@
+[-0]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_negative_int.json b/test/data/nst_json_testsuite2/test_parsing/y_number_negative_int.json
new file mode 100644
index 00000000..8e30f8bd
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_negative_int.json
@@ -0,0 +1 @@
+[-123]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_negative_one.json b/test/data/nst_json_testsuite2/test_parsing/y_number_negative_one.json
new file mode 100644
index 00000000..99d21a2a
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_negative_one.json
@@ -0,0 +1 @@
+[-1]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_negative_zero.json b/test/data/nst_json_testsuite2/test_parsing/y_number_negative_zero.json
new file mode 100644
index 00000000..37af1312
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_negative_zero.json
@@ -0,0 +1 @@
+[-0]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e.json
new file mode 100644
index 00000000..6edbdfcb
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e.json
@@ -0,0 +1 @@
+[1E22]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_neg_exp.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_neg_exp.json
new file mode 100644
index 00000000..0a01bd3e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_neg_exp.json
@@ -0,0 +1 @@
+[1E-2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_pos_exp.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_pos_exp.json
new file mode 100644
index 00000000..5a8fc097
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_pos_exp.json
@@ -0,0 +1 @@
+[1E+2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_exponent.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_exponent.json
new file mode 100644
index 00000000..da2522d6
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_exponent.json
@@ -0,0 +1 @@
+[123e45]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_fraction_exponent.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_fraction_exponent.json
new file mode 100644
index 00000000..3944a7a4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_fraction_exponent.json
@@ -0,0 +1 @@
+[123.456e78]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_neg_exp.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_neg_exp.json
new file mode 100644
index 00000000..ca40d3c2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_neg_exp.json
@@ -0,0 +1 @@
+[1e-2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_real_pos_exponent.json b/test/data/nst_json_testsuite2/test_parsing/y_number_real_pos_exponent.json
new file mode 100644
index 00000000..343601d5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_real_pos_exponent.json
@@ -0,0 +1 @@
+[1e+2]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_simple_int.json b/test/data/nst_json_testsuite2/test_parsing/y_number_simple_int.json
new file mode 100644
index 00000000..e47f69af
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_simple_int.json
@@ -0,0 +1 @@
+[123]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_number_simple_real.json b/test/data/nst_json_testsuite2/test_parsing/y_number_simple_real.json
new file mode 100644
index 00000000..b02878e5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_number_simple_real.json
@@ -0,0 +1 @@
+[123.456789]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object.json b/test/data/nst_json_testsuite2/test_parsing/y_object.json
new file mode 100755
index 00000000..78262eda
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object.json
@@ -0,0 +1 @@
+{"asd":"sdf", "dfg":"fgh"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_basic.json b/test/data/nst_json_testsuite2/test_parsing/y_object_basic.json
new file mode 100755
index 00000000..646bbe7b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_basic.json
@@ -0,0 +1 @@
+{"asd":"sdf"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key.json b/test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key.json
new file mode 100755
index 00000000..bbc2e1ce
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key.json
@@ -0,0 +1 @@
+{"a":"b","a":"c"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key_and_value.json b/test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key_and_value.json
new file mode 100755
index 00000000..211581c2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key_and_value.json
@@ -0,0 +1 @@
+{"a":"b","a":"b"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_empty.json b/test/data/nst_json_testsuite2/test_parsing/y_object_empty.json
new file mode 100644
index 00000000..9e26dfee
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_empty.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_empty_key.json b/test/data/nst_json_testsuite2/test_parsing/y_object_empty_key.json
new file mode 100755
index 00000000..c0013d3b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_empty_key.json
@@ -0,0 +1 @@
+{"":0}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_escaped_null_in_key.json b/test/data/nst_json_testsuite2/test_parsing/y_object_escaped_null_in_key.json
new file mode 100644
index 00000000..593f0f67
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_escaped_null_in_key.json
@@ -0,0 +1 @@
+{"foo\u0000bar": 42}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_extreme_numbers.json b/test/data/nst_json_testsuite2/test_parsing/y_object_extreme_numbers.json
new file mode 100644
index 00000000..a0d3531c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_extreme_numbers.json
@@ -0,0 +1 @@
+{ "min": -1.0e+28, "max": 1.0e+28 }
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_long_strings.json b/test/data/nst_json_testsuite2/test_parsing/y_object_long_strings.json
new file mode 100644
index 00000000..bdc4a087
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_long_strings.json
@@ -0,0 +1 @@
+{"x":[{"id": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"}], "id": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_simple.json b/test/data/nst_json_testsuite2/test_parsing/y_object_simple.json
new file mode 100644
index 00000000..dacac917
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_simple.json
@@ -0,0 +1 @@
+{"a":[]}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_string_unicode.json b/test/data/nst_json_testsuite2/test_parsing/y_object_string_unicode.json
new file mode 100644
index 00000000..8effdb29
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_string_unicode.json
@@ -0,0 +1 @@
+{"title":"\u041f\u043e\u043b\u0442\u043e\u0440\u0430 \u0417\u0435\u043c\u043b\u0435\u043a\u043e\u043f\u0430" }
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_object_with_newlines.json b/test/data/nst_json_testsuite2/test_parsing/y_object_with_newlines.json
new file mode 100644
index 00000000..246ec6b3
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_object_with_newlines.json
@@ -0,0 +1,3 @@
+{
+"a": "b"
+}
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_1_2_3_bytes_UTF-8_sequences.json b/test/data/nst_json_testsuite2/test_parsing/y_string_1_2_3_bytes_UTF-8_sequences.json
new file mode 100755
index 00000000..9967ddeb
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_1_2_3_bytes_UTF-8_sequences.json
@@ -0,0 +1 @@
+["\u0060\u012a\u12AB"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pair.json b/test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pair.json
new file mode 100755
index 00000000..996875cc
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pair.json
@@ -0,0 +1 @@
+["\uD801\udc37"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pairs.json b/test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pairs.json
new file mode 100755
index 00000000..3401021e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pairs.json
@@ -0,0 +1 @@
+["\ud83d\ude39\ud83d\udc8d"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_allowed_escapes.json b/test/data/nst_json_testsuite2/test_parsing/y_string_allowed_escapes.json
new file mode 100644
index 00000000..7f495532
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_allowed_escapes.json
@@ -0,0 +1 @@
+["\"\\\/\b\f\n\r\t"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_backslash_and_u_escaped_zero.json b/test/data/nst_json_testsuite2/test_parsing/y_string_backslash_and_u_escaped_zero.json
new file mode 100755
index 00000000..d4439eda
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_backslash_and_u_escaped_zero.json
@@ -0,0 +1 @@
+["\\u0000"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_backslash_doublequotes.json b/test/data/nst_json_testsuite2/test_parsing/y_string_backslash_doublequotes.json
new file mode 100644
index 00000000..ae03243b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_backslash_doublequotes.json
@@ -0,0 +1 @@
+["\""]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_comments.json b/test/data/nst_json_testsuite2/test_parsing/y_string_comments.json
new file mode 100644
index 00000000..2260c20c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_comments.json
@@ -0,0 +1 @@
+["a/*b*/c/*d//e"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_a.json b/test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_a.json
new file mode 100644
index 00000000..6715d6f4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_a.json
@@ -0,0 +1 @@
+["\\a"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_n.json b/test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_n.json
new file mode 100644
index 00000000..44ca56c4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_n.json
@@ -0,0 +1 @@
+["\\n"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_escaped_control_character.json b/test/data/nst_json_testsuite2/test_parsing/y_string_escaped_control_character.json
new file mode 100644
index 00000000..5b014a9c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_escaped_control_character.json
@@ -0,0 +1 @@
+["\u0012"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_escaped_noncharacter.json b/test/data/nst_json_testsuite2/test_parsing/y_string_escaped_noncharacter.json
new file mode 100755
index 00000000..2ff52e2c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_escaped_noncharacter.json
@@ -0,0 +1 @@
+["\uFFFF"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_in_array.json b/test/data/nst_json_testsuite2/test_parsing/y_string_in_array.json
new file mode 100755
index 00000000..21d7ae4c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_in_array.json
@@ -0,0 +1 @@
+["asd"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_in_array_with_leading_space.json b/test/data/nst_json_testsuite2/test_parsing/y_string_in_array_with_leading_space.json
new file mode 100755
index 00000000..9e1887c1
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_in_array_with_leading_space.json
@@ -0,0 +1 @@
+[ "asd"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_last_surrogates_1_and_2.json b/test/data/nst_json_testsuite2/test_parsing/y_string_last_surrogates_1_and_2.json
new file mode 100644
index 00000000..3919cef7
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_last_surrogates_1_and_2.json
@@ -0,0 +1 @@
+["\uDBFF\uDFFF"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_nbsp_uescaped.json b/test/data/nst_json_testsuite2/test_parsing/y_string_nbsp_uescaped.json
new file mode 100644
index 00000000..2085ab1a
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_nbsp_uescaped.json
@@ -0,0 +1 @@
+["new\u00A0line"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+10FFFF.json b/test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+10FFFF.json
new file mode 100755
index 00000000..059e4d9d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+10FFFF.json
@@ -0,0 +1 @@
+["􏿿"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+FFFF.json b/test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+FFFF.json
new file mode 100755
index 00000000..4c913bd4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+FFFF.json
@@ -0,0 +1 @@
+["￿"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_null_escape.json b/test/data/nst_json_testsuite2/test_parsing/y_string_null_escape.json
new file mode 100644
index 00000000..c1ad8440
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_null_escape.json
@@ -0,0 +1 @@
+["\u0000"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_one-byte-utf-8.json b/test/data/nst_json_testsuite2/test_parsing/y_string_one-byte-utf-8.json
new file mode 100644
index 00000000..15718592
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_one-byte-utf-8.json
@@ -0,0 +1 @@
+["\u002c"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_pi.json b/test/data/nst_json_testsuite2/test_parsing/y_string_pi.json
new file mode 100644
index 00000000..9df11ae8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_pi.json
@@ -0,0 +1 @@
+["π"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_reservedCharacterInUTF-8_U+1BFFF.json b/test/data/nst_json_testsuite2/test_parsing/y_string_reservedCharacterInUTF-8_U+1BFFF.json
new file mode 100755
index 00000000..10a33a17
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_reservedCharacterInUTF-8_U+1BFFF.json
@@ -0,0 +1 @@
+["𛿿"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_simple_ascii.json b/test/data/nst_json_testsuite2/test_parsing/y_string_simple_ascii.json
new file mode 100644
index 00000000..8cadf7d0
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_simple_ascii.json
@@ -0,0 +1 @@
+["asd "]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_space.json b/test/data/nst_json_testsuite2/test_parsing/y_string_space.json
new file mode 100644
index 00000000..efd782cc
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_space.json
@@ -0,0 +1 @@
+" "
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_surrogates_U+1D11E_MUSICAL_SYMBOL_G_CLEF.json b/test/data/nst_json_testsuite2/test_parsing/y_string_surrogates_U+1D11E_MUSICAL_SYMBOL_G_CLEF.json
new file mode 100755
index 00000000..7620b665
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_surrogates_U+1D11E_MUSICAL_SYMBOL_G_CLEF.json
@@ -0,0 +1 @@
+["\uD834\uDd1e"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_three-byte-utf-8.json b/test/data/nst_json_testsuite2/test_parsing/y_string_three-byte-utf-8.json
new file mode 100644
index 00000000..108f1d67
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_three-byte-utf-8.json
@@ -0,0 +1 @@
+["\u0821"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_two-byte-utf-8.json b/test/data/nst_json_testsuite2/test_parsing/y_string_two-byte-utf-8.json
new file mode 100644
index 00000000..461503c3
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_two-byte-utf-8.json
@@ -0,0 +1 @@
+["\u0123"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_u+2028_line_sep.json b/test/data/nst_json_testsuite2/test_parsing/y_string_u+2028_line_sep.json
new file mode 100755
index 00000000..897b6021
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_u+2028_line_sep.json
@@ -0,0 +1 @@
+["
"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_u+2029_par_sep.json b/test/data/nst_json_testsuite2/test_parsing/y_string_u+2029_par_sep.json
new file mode 100755
index 00000000..8cd998c8
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_u+2029_par_sep.json
@@ -0,0 +1 @@
+["
"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_uEscape.json b/test/data/nst_json_testsuite2/test_parsing/y_string_uEscape.json
new file mode 100755
index 00000000..f7b41a02
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_uEscape.json
@@ -0,0 +1 @@
+["\u0061\u30af\u30EA\u30b9"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_uescaped_newline.json b/test/data/nst_json_testsuite2/test_parsing/y_string_uescaped_newline.json
new file mode 100644
index 00000000..3a5a220b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_uescaped_newline.json
@@ -0,0 +1 @@
+["new\u000Aline"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unescaped_char_delete.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unescaped_char_delete.json
new file mode 100755
index 00000000..7d064f49
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unescaped_char_delete.json
@@ -0,0 +1 @@
+[""]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode.json
new file mode 100644
index 00000000..3598095b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode.json
@@ -0,0 +1 @@
+["\uA66D"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicodeEscapedBackslash.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicodeEscapedBackslash.json
new file mode 100755
index 00000000..0bb3b51e
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicodeEscapedBackslash.json
@@ -0,0 +1 @@
+["\u005C"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_2.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_2.json
new file mode 100644
index 00000000..a7dcb976
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_2.json
@@ -0,0 +1 @@
+["⍂㈴⍂"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+10FFFE_nonchar.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+10FFFE_nonchar.json
new file mode 100644
index 00000000..9a8370b9
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+10FFFE_nonchar.json
@@ -0,0 +1 @@
+["\uDBFF\uDFFE"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+1FFFE_nonchar.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+1FFFE_nonchar.json
new file mode 100644
index 00000000..c51f8ae4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+1FFFE_nonchar.json
@@ -0,0 +1 @@
+["\uD83F\uDFFE"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+200B_ZERO_WIDTH_SPACE.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+200B_ZERO_WIDTH_SPACE.json
new file mode 100644
index 00000000..626d5f81
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+200B_ZERO_WIDTH_SPACE.json
@@ -0,0 +1 @@
+["\u200B"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+2064_invisible_plus.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+2064_invisible_plus.json
new file mode 100644
index 00000000..1e23972c
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+2064_invisible_plus.json
@@ -0,0 +1 @@
+["\u2064"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FDD0_nonchar.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FDD0_nonchar.json
new file mode 100644
index 00000000..18ef151b
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FDD0_nonchar.json
@@ -0,0 +1 @@
+["\uFDD0"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FFFE_nonchar.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FFFE_nonchar.json
new file mode 100644
index 00000000..13d261fd
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FFFE_nonchar.json
@@ -0,0 +1 @@
+["\uFFFE"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_escaped_double_quote.json b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_escaped_double_quote.json
new file mode 100755
index 00000000..4e625785
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_unicode_escaped_double_quote.json
@@ -0,0 +1 @@
+["\u0022"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_utf8.json b/test/data/nst_json_testsuite2/test_parsing/y_string_utf8.json
new file mode 100644
index 00000000..40878435
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_utf8.json
@@ -0,0 +1 @@
+["€𝄞"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_string_with_del_character.json b/test/data/nst_json_testsuite2/test_parsing/y_string_with_del_character.json
new file mode 100755
index 00000000..8bd24907
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_string_with_del_character.json
@@ -0,0 +1 @@
+["aa"]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_false.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_false.json
new file mode 100644
index 00000000..02e4a84d
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_false.json
@@ -0,0 +1 @@
+false
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_int.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_int.json
new file mode 100755
index 00000000..f70d7bba
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_int.json
@@ -0,0 +1 @@
+42
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_negative_real.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_negative_real.json
new file mode 100755
index 00000000..b5135a20
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_negative_real.json
@@ -0,0 +1 @@
+-0.1
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_null.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_null.json
new file mode 100644
index 00000000..ec747fa4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_null.json
@@ -0,0 +1 @@
+null
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_string.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_string.json
new file mode 100755
index 00000000..b6e982ca
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_string.json
@@ -0,0 +1 @@
+"asd"
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_true.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_true.json
new file mode 100755
index 00000000..f32a5804
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_true.json
@@ -0,0 +1 @@
+true
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_string_empty.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_string_empty.json
new file mode 100644
index 00000000..3cc762b5
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_string_empty.json
@@ -0,0 +1 @@
+""
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_trailing_newline.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_trailing_newline.json
new file mode 100644
index 00000000..0c3426d4
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_trailing_newline.json
@@ -0,0 +1 @@
+["a"]
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_true_in_array.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_true_in_array.json
new file mode 100644
index 00000000..de601e30
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_true_in_array.json
@@ -0,0 +1 @@
+[true]
\ No newline at end of file
diff --git a/test/data/nst_json_testsuite2/test_parsing/y_structure_whitespace_array.json b/test/data/nst_json_testsuite2/test_parsing/y_structure_whitespace_array.json
new file mode 100644
index 00000000..2bedf7f2
--- /dev/null
+++ b/test/data/nst_json_testsuite2/test_parsing/y_structure_whitespace_array.json
@@ -0,0 +1 @@
+ [] 
\ No newline at end of file
diff --git a/test/src/fuzzer-driver_afl.cpp b/test/src/fuzzer-driver_afl.cpp
index bc8b3e76..dd01b749 100644
--- a/test/src/fuzzer-driver_afl.cpp
+++ b/test/src/fuzzer-driver_afl.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a driver for American Fuzzy Lop (afl-fuzz). It relies on
diff --git a/test/src/fuzzer-parse_cbor.cpp b/test/src/fuzzer-parse_cbor.cpp
index 0520ae7c..20050eb7 100644
--- a/test/src/fuzzer-parse_cbor.cpp
+++ b/test/src/fuzzer-parse_cbor.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
@@ -58,6 +58,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
     {
         // type errors can occur during parsing, too
     }
+    catch (const json::out_of_range&)
+    {
+        // out of range errors can occur during parsing, too
+    }
 
     // return 0 - non-zero return values are reserved for future use
     return 0;
diff --git a/test/src/fuzzer-parse_json.cpp b/test/src/fuzzer-parse_json.cpp
index 2d13c26b..d159a709 100644
--- a/test/src/fuzzer-parse_json.cpp
+++ b/test/src/fuzzer-parse_json.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
@@ -63,6 +63,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
     {
         // parse errors are ok, because input may be random bytes
     }
+    catch (const json::out_of_range&)
+    {
+        // out of range errors may happen if provided sizes are excessive
+    }
 
     // return 0 - non-zero return values are reserved for future use
     return 0;
diff --git a/test/src/fuzzer-parse_msgpack.cpp b/test/src/fuzzer-parse_msgpack.cpp
index 6f98409f..0421e134 100644
--- a/test/src/fuzzer-parse_msgpack.cpp
+++ b/test/src/fuzzer-parse_msgpack.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
@@ -58,6 +58,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
     {
         // type errors can occur during parsing, too
     }
+    catch (const json::out_of_range&)
+    {
+        // out of range errors may happen if provided sizes are excessive
+    }
 
     // return 0 - non-zero return values are reserved for future use
     return 0;
diff --git a/test/src/fuzzer-parse_ubjson.cpp b/test/src/fuzzer-parse_ubjson.cpp
index 1d7c936c..d20f0fe2 100644
--- a/test/src/fuzzer-parse_ubjson.cpp
+++ b/test/src/fuzzer-parse_ubjson.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
diff --git a/test/src/unit-algorithms.cpp b/test/src/unit-algorithms.cpp
index 6579c4a5..c525ff11 100644
--- a/test/src/unit-algorithms.cpp
+++ b/test/src/unit-algorithms.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-allocator.cpp b/test/src/unit-allocator.cpp
index debe69ad..8cf5160f 100644
--- a/test/src/unit-allocator.cpp
+++ b/test/src/unit-allocator.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -175,29 +176,6 @@ TEST_CASE("controlled bad_alloc")
             CHECK_THROWS_AS(my_json::json_value(v), std::bad_alloc&);
             next_construct_fails = false;
         }
-
-        /*
-                SECTION("json_value(const object_t&)")
-                {
-                    next_construct_fails = false;
-                    my_json::object_t v {{"foo", "bar"}};
-                    CHECK_NOTHROW(my_json::json_value j(v));
-                    next_construct_fails = true;
-                    CHECK_THROWS_AS(my_json::json_value j(v), std::bad_alloc&);
-                    next_construct_fails = false;
-                }
-        */
-        /*
-                SECTION("json_value(const array_t&)")
-                {
-                    next_construct_fails = false;
-                    my_json::array_t v = {"foo", "bar", "baz"};
-                    CHECK_NOTHROW(my_json::json_value j(v));
-                    next_construct_fails = true;
-                    CHECK_THROWS_AS(my_json::json_value j(v), std::bad_alloc&);
-                    next_construct_fails = false;
-                }
-        */
     }
 
     SECTION("class basic_json")
diff --git a/test/src/unit-alt-string.cpp b/test/src/unit-alt-string.cpp
index 36c8b83b..356835c0 100644
--- a/test/src/unit-alt-string.cpp
+++ b/test/src/unit-alt-string.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2018 Vitaliy Manushkin <agri@akamo.info>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -32,6 +33,12 @@ SOFTWARE.
 #include <string>
 #include <utility>
 
+
+/* forward declarations */
+class alt_string;
+bool operator<(const char* op1, const alt_string& op2);
+
+
 /*
  * This is virtually a string class.
  * It covers std::string under the hood.
@@ -59,17 +66,27 @@ class alt_string
     }
 
     template <typename op_type>
-    bool operator==(op_type&& op) const
+    bool operator==(const op_type& op) const
     {
         return str_impl == op;
     }
 
+    bool operator==(const alt_string& op) const
+    {
+        return str_impl == op.str_impl;
+    }
+
     template <typename op_type>
-    bool operator!=(op_type&& op) const
+    bool operator!=(const op_type& op) const
     {
         return str_impl != op;
     }
 
+    bool operator!=(const alt_string& op) const
+    {
+        return str_impl != op.str_impl;
+    }
+
     std::size_t size() const noexcept
     {
         return str_impl.size();
@@ -86,7 +103,7 @@ class alt_string
     }
 
     template <typename op_type>
-    bool operator<(op_type&& op) const
+    bool operator<(const op_type& op) const
     {
         return str_impl < op;
     }
@@ -133,6 +150,8 @@ class alt_string
 
   private:
     std::string str_impl;
+
+    friend bool ::operator<(const char*, const alt_string&);
 };
 
 
@@ -148,6 +167,12 @@ using alt_json = nlohmann::basic_json <
                  nlohmann::adl_serializer >;
 
 
+bool operator<(const char* op1, const alt_string& op2)
+{
+    return op1 < op2.str_impl;
+}
+
+
 
 TEST_CASE("alternative string type")
 {
@@ -209,4 +234,34 @@ TEST_CASE("alternative string type")
         alt_string dump = doc.dump();
         CHECK(dump == R"({"foo":"bar"})");
     }
+
+    SECTION("equality")
+    {
+        alt_json doc;
+        doc["Who are you?"] = "I'm Batman";
+
+        CHECK("I'm Batman" == doc["Who are you?"]);
+        CHECK(doc["Who are you?"]  == "I'm Batman");
+        CHECK_FALSE("I'm Batman" != doc["Who are you?"]);
+        CHECK_FALSE(doc["Who are you?"]  != "I'm Batman");
+
+        CHECK("I'm Bruce Wayne" != doc["Who are you?"]);
+        CHECK(doc["Who are you?"]  != "I'm Bruce Wayne");
+        CHECK_FALSE("I'm Bruce Wayne" == doc["Who are you?"]);
+        CHECK_FALSE(doc["Who are you?"]  == "I'm Bruce Wayne");
+
+        {
+            const alt_json& const_doc = doc;
+
+            CHECK("I'm Batman" == const_doc["Who are you?"]);
+            CHECK(const_doc["Who are you?"] == "I'm Batman");
+            CHECK_FALSE("I'm Batman" != const_doc["Who are you?"]);
+            CHECK_FALSE(const_doc["Who are you?"] != "I'm Batman");
+
+            CHECK("I'm Bruce Wayne" != const_doc["Who are you?"]);
+            CHECK(const_doc["Who are you?"] != "I'm Bruce Wayne");
+            CHECK_FALSE("I'm Bruce Wayne" == const_doc["Who are you?"]);
+            CHECK_FALSE(const_doc["Who are you?"] == "I'm Bruce Wayne");
+        }
+    }
 }
diff --git a/test/src/unit-capacity.cpp b/test/src/unit-capacity.cpp
index 47ac03cc..718d102a 100644
--- a/test/src/unit-capacity.cpp
+++ b/test/src/unit-capacity.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-cbor.cpp b/test/src/unit-cbor.cpp
index 6b9eac52..525c7630 100644
--- a/test/src/unit-cbor.cpp
+++ b/test/src/unit-cbor.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -33,6 +34,76 @@ using nlohmann::json;
 
 #include <fstream>
 
+class SaxCountdown
+{
+  public:
+    explicit SaxCountdown(const int count) : events_left(count)
+    {}
+
+    bool null()
+    {
+        return events_left-- > 0;
+    }
+
+    bool boolean(bool)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_integer(json::number_integer_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_unsigned(json::number_unsigned_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_float(json::number_float_t, const std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool string(std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_object(std::size_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool key(std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_object()
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_array(std::size_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_array()
+    {
+        return events_left-- > 0;
+    }
+
+    bool parse_error(std::size_t, const std::string&, const json::exception&)
+    {
+        return false;
+    }
+
+  private:
+    int events_left = 0;
+};
+
 TEST_CASE("CBOR")
 {
     SECTION("individual values")
@@ -54,6 +125,7 @@ TEST_CASE("CBOR")
 
             // roundtrip
             CHECK(json::from_cbor(result) == j);
+            CHECK(json::from_cbor(result, true, false) == j);
         }
 
         SECTION("boolean")
@@ -67,6 +139,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("false")
@@ -78,6 +151,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
         }
 
@@ -142,6 +216,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -190,6 +265,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -225,6 +301,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -241,6 +318,7 @@ TEST_CASE("CBOR")
 
                     // roundtrip
                     CHECK(json::from_cbor(result) == j);
+                    CHECK(json::from_cbor(result, true, false) == j);
                 }
 
                 SECTION("-256..-24")
@@ -271,6 +349,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -300,6 +379,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -330,6 +410,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -362,6 +443,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -396,6 +478,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -438,6 +521,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -488,10 +572,10 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
-                /*
                 SECTION("-32768..-129 (int 16)")
                 {
                     for (int16_t i = -32768; i <= -129; ++i)
@@ -517,14 +601,13 @@ TEST_CASE("CBOR")
 
                         // check individual bytes
                         CHECK(result[0] == 0xd1);
-                        int16_t restored = (result[1] << 8) + result[2];
+                        int16_t restored = static_cast<int16_t>((result[1] << 8) + result[2]);
                         CHECK(restored == i);
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
                     }
                 }
-                */
             }
 
             SECTION("unsigned")
@@ -555,6 +638,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -587,6 +671,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -620,6 +705,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -661,6 +747,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
 
@@ -710,6 +797,7 @@ TEST_CASE("CBOR")
 
                         // roundtrip
                         CHECK(json::from_cbor(result) == j);
+                        CHECK(json::from_cbor(result, true, false) == j);
                     }
                 }
             }
@@ -730,6 +818,8 @@ TEST_CASE("CBOR")
                     // roundtrip
                     CHECK(json::from_cbor(result) == j);
                     CHECK(json::from_cbor(result) == v);
+
+                    CHECK(json::from_cbor(result, true, false) == j);
                 }
             }
 
@@ -742,12 +832,14 @@ TEST_CASE("CBOR")
                         CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xf9})), json::parse_error&);
                         CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xf9})),
                                           "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                        CHECK(json::from_cbor(std::vector<uint8_t>({0xf9}), true, false).is_discarded());
                     }
                     SECTION("only one byte follows")
                     {
                         CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xf9, 0x7c})), json::parse_error&);
                         CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xf9, 0x7c})),
                                           "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                        CHECK(json::from_cbor(std::vector<uint8_t>({0xf9, 0x7c}), true, false).is_discarded());
                     }
                 }
 
@@ -868,6 +960,7 @@ TEST_CASE("CBOR")
 
                     // roundtrip
                     CHECK(json::from_cbor(result) == j);
+                    CHECK(json::from_cbor(result, true, false) == j);
                 }
             }
 
@@ -899,6 +992,7 @@ TEST_CASE("CBOR")
 
                     // roundtrip
                     CHECK(json::from_cbor(result) == j);
+                    CHECK(json::from_cbor(result, true, false) == j);
                 }
             }
 
@@ -931,6 +1025,7 @@ TEST_CASE("CBOR")
 
                     // roundtrip
                     CHECK(json::from_cbor(result) == j);
+                    CHECK(json::from_cbor(result, true, false) == j);
                 }
             }
 
@@ -965,6 +1060,7 @@ TEST_CASE("CBOR")
 
                     // roundtrip
                     CHECK(json::from_cbor(result) == j);
+                    CHECK(json::from_cbor(result, true, false) == j);
                 }
             }
         }
@@ -980,6 +1076,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("[null]")
@@ -991,6 +1088,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("[1,2,3,4,5]")
@@ -1002,6 +1100,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("[[[[]]]]")
@@ -1013,6 +1112,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("array with uint16_t elements")
@@ -1027,6 +1127,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("array with uint32_t elements")
@@ -1043,29 +1144,8 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
-
-            /*
-            SECTION("array with uint64_t elements")
-            {
-                json j(4294967296, nullptr);
-                std::vector<uint8_t> expected(j.size() + 9, 0xf6); // all null
-                expected[0] = 0x9b; // array 64 bit
-                expected[1] = 0x00; // size (0x0000000100000000), byte 0
-                expected[2] = 0x00; // size (0x0000000100000000), byte 1
-                expected[3] = 0x00; // size (0x0000000100000000), byte 2
-                expected[4] = 0x01; // size (0x0000000100000000), byte 3
-                expected[5] = 0x00; // size (0x0000000100000000), byte 4
-                expected[6] = 0x00; // size (0x0000000100000000), byte 5
-                expected[7] = 0x00; // size (0x0000000100000000), byte 6
-                expected[8] = 0x00; // size (0x0000000100000000), byte 7
-                const auto result = json::to_cbor(j);
-                CHECK(result == expected);
-
-                // roundtrip
-                CHECK(json::from_cbor(result) == j);
-            }
-            */
         }
 
         SECTION("object")
@@ -1079,6 +1159,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("{\"\":null}")
@@ -1090,6 +1171,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("{\"a\": {\"b\": {\"c\": {}}}}")
@@ -1104,6 +1186,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("object with uint8_t elements")
@@ -1130,6 +1213,7 @@ TEST_CASE("CBOR")
                 CHECK(result[1] == 0xff); // size byte (0xff)
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("object with uint16_t elements")
@@ -1158,6 +1242,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
 
             SECTION("object with uint32_t elements")
@@ -1188,6 +1273,7 @@ TEST_CASE("CBOR")
 
                 // roundtrip
                 CHECK(json::from_cbor(result) == j);
+                CHECK(json::from_cbor(result, true, false) == j);
             }
         }
     }
@@ -1229,6 +1315,7 @@ TEST_CASE("CBOR")
             CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>()), json::parse_error&);
             CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>()),
                               "[json.exception.parse_error.110] parse error at 1: unexpected end of input");
+            CHECK(json::from_cbor(std::vector<uint8_t>(), true, false).is_discarded());
         }
 
         SECTION("too short byte vector")
@@ -1248,6 +1335,15 @@ TEST_CASE("CBOR")
             CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00})), json::parse_error&);
             CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})), json::parse_error&);
             CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x62})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x62, 0x60})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x7F})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x7F, 0x60})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x82, 0x01})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x9F, 0x01})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xBF, 0x61, 0x61, 0xF5})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xA1, 0x61, 0X61})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xBF, 0x61, 0X61})), json::parse_error&);
 
             CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x18})),
                               "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
@@ -1279,6 +1375,49 @@ TEST_CASE("CBOR")
                               "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
             CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})),
                               "[json.exception.parse_error.110] parse error at 9: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x62})),
+                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x62, 0x60})),
+                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x7F})),
+                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x7F, 0x60})),
+                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x82, 0x01})),
+                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x9F, 0x01})),
+                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xBF, 0x61, 0x61, 0xF5})),
+                              "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xA1, 0x61, 0x61})),
+                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xBF, 0x61, 0x61})),
+                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x18}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x19}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x19, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1a}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1a, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1a, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1a, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x62}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x62, 0x60}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x7F}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x7F, 0x60}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x82, 0x01}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0x9F, 0x01}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0xBF, 0x61, 0x61, 0xF5}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0xA1, 0x61, 0x61}), true, false).is_discarded());
+            CHECK(json::from_cbor(std::vector<uint8_t>({0xBF, 0x61, 0x61}), true, false).is_discarded());
         }
 
         SECTION("unsupported bytes")
@@ -1288,9 +1427,12 @@ TEST_CASE("CBOR")
                 CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0x1c})), json::parse_error&);
                 CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1c})),
                                   "[json.exception.parse_error.112] parse error at 1: error reading CBOR; last byte: 0x1C");
+                CHECK(json::from_cbor(std::vector<uint8_t>({0x1c}), true, false).is_discarded());
+
                 CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xf8})), json::parse_error&);
                 CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xf8})),
                                   "[json.exception.parse_error.112] parse error at 1: error reading CBOR; last byte: 0xF8");
+                CHECK(json::from_cbor(std::vector<uint8_t>({0xf8}), true, false).is_discarded());
             }
 
             SECTION("all unsupported bytes")
@@ -1340,6 +1482,7 @@ TEST_CASE("CBOR")
                         })
                 {
                     CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({static_cast<uint8_t>(byte)})), json::parse_error&);
+                    CHECK(json::from_cbor(std::vector<uint8_t>({static_cast<uint8_t>(byte)}), true, false).is_discarded());
                 }
             }
         }
@@ -1349,6 +1492,7 @@ TEST_CASE("CBOR")
             CHECK_THROWS_AS(json::from_cbor(std::vector<uint8_t>({0xa1, 0xff, 0x01})), json::parse_error&);
             CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0xa1, 0xff, 0x01})),
                               "[json.exception.parse_error.113] parse error at 2: expected a CBOR string; last byte: 0xFF");
+            CHECK(json::from_cbor(std::vector<uint8_t>({0xa1, 0xff, 0x01}), true, false).is_discarded());
         }
 
         SECTION("strict mode")
@@ -1358,6 +1502,7 @@ TEST_CASE("CBOR")
             {
                 const auto result = json::from_cbor(vec, false);
                 CHECK(result == json());
+                CHECK(not json::from_cbor(vec, false, false).is_discarded());
             }
 
             SECTION("strict mode")
@@ -1365,9 +1510,34 @@ TEST_CASE("CBOR")
                 CHECK_THROWS_AS(json::from_cbor(vec), json::parse_error&);
                 CHECK_THROWS_WITH(json::from_cbor(vec),
                                   "[json.exception.parse_error.110] parse error at 2: expected end of input");
+                CHECK(json::from_cbor(vec, true, false).is_discarded());
             }
         }
     }
+
+    SECTION("SAX aborts")
+    {
+        SECTION("start_array(len)")
+        {
+            std::vector<uint8_t> v = {0x83, 0x01, 0x02, 0x03};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::cbor));
+        }
+
+        SECTION("start_object(len)")
+        {
+            std::vector<uint8_t> v = {0xA1, 0x63, 0x66, 0x6F, 0x6F, 0xF4};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::cbor));
+        }
+
+        SECTION("key()")
+        {
+            std::vector<uint8_t> v = {0xA1, 0x63, 0x66, 0x6F, 0x6F, 0xF4};
+            SaxCountdown scp(1);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::cbor));
+        }
+    }
 }
 
 // use this testcase outside [hide] to run it with Valgrind
@@ -1490,6 +1660,22 @@ TEST_CASE("CBOR roundtrips", "[hide]")
 {
     SECTION("input from flynn")
     {
+        // most of these are exluded due to differences in key order (not a real problem)
+        auto exclude_packed = std::set<std::string>
+        {
+            "test/data/json.org/1.json",
+            "test/data/json.org/2.json",
+            "test/data/json.org/3.json",
+            "test/data/json.org/4.json",
+            "test/data/json.org/5.json",
+            "test/data/json_testsuite/sample.json", // kills AppVeyor
+            "test/data/json_tests/pass1.json",
+            "test/data/regression/working_file.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_duplicated_key.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_long_strings.json",
+        };
+
         for (std::string filename :
                 {
                     "test/data/json_nlohmann_tests/all_unicode.json",
@@ -1641,12 +1827,12 @@ TEST_CASE("CBOR roundtrips", "[hide]")
         {
             CAPTURE(filename);
 
-            // parse JSON file
-            std::ifstream f_json(filename);
-            json j1 = json::parse(f_json);
-
-            SECTION("std::vector<uint8_t>")
+            SECTION(filename + ": std::vector<uint8_t>")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse CBOR file
                 std::ifstream f_cbor(filename + ".cbor", std::ios::binary);
                 std::vector<uint8_t> packed(
@@ -1659,8 +1845,12 @@ TEST_CASE("CBOR roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("std::ifstream")
+            SECTION(filename + ": std::ifstream")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse CBOR file
                 std::ifstream f_cbor(filename + ".cbor", std::ios::binary);
                 json j2;
@@ -1670,8 +1860,12 @@ TEST_CASE("CBOR roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("uint8_t* and size")
+            SECTION(filename + ": uint8_t* and size")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse CBOR file
                 std::ifstream f_cbor(filename + ".cbor", std::ios::binary);
                 std::vector<uint8_t> packed(
@@ -1684,19 +1878,26 @@ TEST_CASE("CBOR roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("output to output adapters")
+            SECTION(filename + ": output to output adapters")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse CBOR file
                 std::ifstream f_cbor(filename + ".cbor", std::ios::binary);
                 std::vector<uint8_t> packed(
                     (std::istreambuf_iterator<char>(f_cbor)),
                     std::istreambuf_iterator<char>());
 
-                SECTION("std::vector<uint8_t>")
+                if (!exclude_packed.count(filename))
                 {
-                    std::vector<uint8_t> vec;
-                    json::to_cbor(j1, vec);
-                    CHECK(vec == packed);
+                    SECTION(filename + ": output adapters: std::vector<uint8_t>")
+                    {
+                        std::vector<uint8_t> vec;
+                        json::to_cbor(j1, vec);
+                        CHECK(vec == packed);
+                    }
                 }
             }
         }
diff --git a/test/src/unit-class_const_iterator.cpp b/test/src/unit-class_const_iterator.cpp
index 8319fef5..783eb048 100644
--- a/test/src/unit-class_const_iterator.cpp
+++ b/test/src/unit-class_const_iterator.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-class_iterator.cpp b/test/src/unit-class_iterator.cpp
index 484a49de..e8d530f7 100644
--- a/test/src/unit-class_iterator.cpp
+++ b/test/src/unit-class_iterator.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-class_lexer.cpp b/test/src/unit-class_lexer.cpp
index 164dc67d..65859ad5 100644
--- a/test/src/unit-class_lexer.cpp
+++ b/test/src/unit-class_lexer.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -173,15 +174,4 @@ TEST_CASE("lexer class")
         s += "\"";
         CHECK((scan_string(s.c_str()) == json::lexer::token_type::value_string));
     }
-
-    /* NOTE: to_unicode function has been removed
-    SECTION("to_unicode")
-    {
-        // lexer to call to_unicode on
-        json::lexer dummy_lexer("", 0);
-        CHECK(dummy_lexer.to_unicode(0x1F4A9) == "💩");
-        CHECK_THROWS_AS(dummy_lexer.to_unicode(0x200000), json::parse_error);
-        CHECK_THROWS_WITH(dummy_lexer.to_unicode(0x200000), "[json.exception.parse_error.103] parse error: code points above 0x10FFFF are invalid");
-    }
-    */
 }
diff --git a/test/src/unit-class_parser.cpp b/test/src/unit-class_parser.cpp
index 29a948e8..f9115f51 100644
--- a/test/src/unit-class_parser.cpp
+++ b/test/src/unit-class_parser.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -34,6 +35,170 @@ using nlohmann::json;
 
 #include <valarray>
 
+class SaxEventLogger
+{
+  public:
+    bool null()
+    {
+        events.push_back("null()");
+        return true;
+    }
+
+    bool boolean(bool val)
+    {
+        events.push_back(val ? "boolean(true)" : "boolean(false)");
+        return true;
+    }
+
+    bool number_integer(json::number_integer_t val)
+    {
+        events.push_back("number_integer(" + std::to_string(val) + ")");
+        return true;
+    }
+
+    bool number_unsigned(json::number_unsigned_t val)
+    {
+        events.push_back("number_unsigned(" + std::to_string(val) + ")");
+        return true;
+    }
+
+    bool number_float(json::number_float_t, const std::string& s)
+    {
+        events.push_back("number_float(" + s + ")");
+        return true;
+    }
+
+    bool string(std::string& val)
+    {
+        events.push_back("string(" + val + ")");
+        return true;
+    }
+
+    bool start_object(std::size_t elements)
+    {
+        if (elements == std::size_t(-1))
+        {
+            events.push_back("start_object()");
+        }
+        else
+        {
+            events.push_back("start_object(" + std::to_string(elements) + ")");
+        }
+        return true;
+    }
+
+    bool key(std::string& val)
+    {
+        events.push_back("key(" + val + ")");
+        return true;
+    }
+
+    bool end_object()
+    {
+        events.push_back("end_object()");
+        return true;
+    }
+
+    bool start_array(std::size_t elements)
+    {
+        if (elements == std::size_t(-1))
+        {
+            events.push_back("start_array()");
+        }
+        else
+        {
+            events.push_back("start_array(" + std::to_string(elements) + ")");
+        }
+        return true;
+    }
+
+    bool end_array()
+    {
+        events.push_back("end_array()");
+        return true;
+    }
+
+    bool parse_error(std::size_t position, const std::string&, const json::exception&)
+    {
+        errored = true;
+        events.push_back("parse_error(" + std::to_string(position) + ")");
+        return false;
+    }
+
+    std::vector<std::string> events;
+    bool errored = false;
+};
+
+class SaxCountdown : public nlohmann::json::json_sax_t
+{
+  public:
+    explicit SaxCountdown(const int count) : events_left(count)
+    {}
+
+    bool null() override
+    {
+        return events_left-- > 0;
+    }
+
+    bool boolean(bool) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_integer(json::number_integer_t) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_unsigned(json::number_unsigned_t) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_float(json::number_float_t, const std::string&) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool string(std::string&) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_object(std::size_t) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool key(std::string&) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_object() override
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_array(std::size_t) override
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_array() override
+    {
+        return events_left-- > 0;
+    }
+
+    bool parse_error(std::size_t, const std::string&, const json::exception&) override
+    {
+        return false;
+    }
+
+  private:
+    int events_left = 0;
+};
+
 json parser_helper(const std::string& s);
 bool accept_helper(const std::string& s);
 
@@ -48,11 +213,18 @@ json parser_helper(const std::string& s)
     CHECK_NOTHROW(json::parser(nlohmann::detail::input_adapter(s), nullptr, false).parse(true, j_nothrow));
     CHECK(j_nothrow == j);
 
+    json j_sax;
+    nlohmann::detail::json_sax_dom_parser<json> sdp(j_sax);
+    json::sax_parse(s, &sdp);
+    CHECK(j_sax == j);
+
     return j;
 }
 
 bool accept_helper(const std::string& s)
 {
+    CAPTURE(s);
+
     // 1. parse s without exceptions
     json j;
     CHECK_NOTHROW(json::parser(nlohmann::detail::input_adapter(s), nullptr, false).parse(true, j));
@@ -64,7 +236,23 @@ bool accept_helper(const std::string& s)
     // 3. check if both approaches come to the same result
     CHECK(ok_noexcept == ok_accept);
 
-    // 4. return result
+    // 4. parse with SAX (compare with relaxed accept result)
+    SaxEventLogger el;
+    CHECK_NOTHROW(json::sax_parse(s, &el, json::input_format_t::json, false));
+    CHECK(json::parser(nlohmann::detail::input_adapter(s)).accept(false) == not el.errored);
+
+    // 5. parse with simple callback
+    json::parser_callback_t cb = [](int, json::parse_event_t, json&)
+    {
+        return true;
+    };
+    json j_cb = json::parse(s, cb, false);
+    const bool ok_noexcept_cb = not j_cb.is_discarded();
+
+    // 6. check if this approach came to the same result
+    CHECK(ok_noexcept == ok_noexcept_cb);
+
+    // 7. return result
     return ok_accept;
 }
 
@@ -1472,4 +1660,100 @@ TEST_CASE("parser class")
             CHECK(j == json(true));
         }
     }
+
+    SECTION("improve test coverage")
+    {
+        SECTION("parser with callback")
+        {
+            json::parser_callback_t cb = [](int, json::parse_event_t, json&)
+            {
+                return true;
+            };
+
+            CHECK(json::parse("{\"foo\": true:", cb, false).is_discarded());
+
+            CHECK_THROWS_AS(json::parse("{\"foo\": true:", cb), json::parse_error&);
+            CHECK_THROWS_WITH(json::parse("{\"foo\": true:", cb),
+                              "[json.exception.parse_error.101] parse error at 13: syntax error - unexpected ':'; expected '}'");
+
+            CHECK_THROWS_AS(json::parse("1.18973e+4932", cb), json::out_of_range&);
+            CHECK_THROWS_WITH(json::parse("1.18973e+4932", cb),
+                              "[json.exception.out_of_range.406] number overflow parsing '1.18973e+4932'");
+        }
+
+        SECTION("SAX parser")
+        {
+            SECTION("} without value")
+            {
+                SaxCountdown s(1);
+                CHECK(json::sax_parse("{}", &s) == false);
+            }
+
+            SECTION("} with value")
+            {
+                SaxCountdown s(3);
+                CHECK(json::sax_parse("{\"k1\": true}", &s) == false);
+            }
+
+            SECTION("second key")
+            {
+                SaxCountdown s(3);
+                CHECK(json::sax_parse("{\"k1\": true, \"k2\": false}", &s) == false);
+            }
+
+            SECTION("] without value")
+            {
+                SaxCountdown s(1);
+                CHECK(json::sax_parse("[]", &s) == false);
+            }
+
+            SECTION("] with value")
+            {
+                SaxCountdown s(2);
+                CHECK(json::sax_parse("[1]", &s) == false);
+            }
+
+            SECTION("float")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("3.14", &s) == false);
+            }
+
+            SECTION("false")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("false", &s) == false);
+            }
+
+            SECTION("null")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("null", &s) == false);
+            }
+
+            SECTION("true")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("true", &s) == false);
+            }
+
+            SECTION("unsigned")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("12", &s) == false);
+            }
+
+            SECTION("integer")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("-12", &s) == false);
+            }
+
+            SECTION("string")
+            {
+                SaxCountdown s(0);
+                CHECK(json::sax_parse("\"foo\"", &s) == false);
+            }
+        }
+    }
 }
diff --git a/test/src/unit-comparison.cpp b/test/src/unit-comparison.cpp
index 0659c1db..3da891b6 100644
--- a/test/src/unit-comparison.cpp
+++ b/test/src/unit-comparison.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -32,7 +33,7 @@ SOFTWARE.
 using nlohmann::json;
 
 // helper function to check std::less<json::value_t>
-// see http://en.cppreference.com/w/cpp/utility/functional/less
+// see https://en.cppreference.com/w/cpp/utility/functional/less
 template <typename A, typename B, typename U = std::less<json::value_t>>
 bool f(A a, B b, U u = U())
 {
diff --git a/test/src/unit-concepts.cpp b/test/src/unit-concepts.cpp
index e2aac157..95013c69 100644
--- a/test/src/unit-concepts.cpp
+++ b/test/src/unit-concepts.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-constructor1.cpp b/test/src/unit-constructor1.cpp
index 35652bd8..d6040fc3 100644
--- a/test/src/unit-constructor1.cpp
+++ b/test/src/unit-constructor1.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-constructor2.cpp b/test/src/unit-constructor2.cpp
index e36de923..14738023 100644
--- a/test/src/unit-constructor2.cpp
+++ b/test/src/unit-constructor2.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-convenience.cpp b/test/src/unit-convenience.cpp
index 15596032..08c0b162 100644
--- a/test/src/unit-convenience.cpp
+++ b/test/src/unit-convenience.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-conversions.cpp b/test/src/unit-conversions.cpp
index d67f5acb..fd09b230 100644
--- a/test/src/unit-conversions.cpp
+++ b/test/src/unit-conversions.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -39,11 +40,28 @@ using nlohmann::json;
 #include <unordered_set>
 #include <valarray>
 
+#if (defined(__cplusplus) && __cplusplus >= 201703L) || (defined(_HAS_CXX17) && _HAS_CXX17 == 1) // fix for issue #464
+    #define JSON_HAS_CPP_17
+    #define JSON_HAS_CPP_14
+#elif (defined(__cplusplus) && __cplusplus >= 201402L) || (defined(_HAS_CXX14) && _HAS_CXX14 == 1)
+    #define JSON_HAS_CPP_14
+#endif
+
+#if defined(JSON_HAS_CPP_17)
+    #include <string_view>
+#endif
+
 TEST_CASE("value conversion")
 {
     SECTION("get an object (explicit)")
     {
-        json::object_t o_reference = {{"object", json::object()}, {"array", {1, 2, 3, 4}}, {"number", 42}, {"boolean", false}, {"null", nullptr}, {"string", "Hello world"} };
+        json::object_t o_reference = {{"object", json::object()},
+            {"array", {1, 2, 3, 4}},
+            {"number", 42},
+            {"boolean", false},
+            {"null", nullptr},
+            {"string", "Hello world"}
+        };
         json j(o_reference);
 
         SECTION("json::object_t")
@@ -54,19 +72,22 @@ TEST_CASE("value conversion")
 
         SECTION("std::map<json::string_t, json>")
         {
-            std::map<json::string_t, json> o = j.get<std::map<json::string_t, json>>();
+            std::map<json::string_t, json> o =
+                j.get<std::map<json::string_t, json>>();
             CHECK(json(o) == j);
         }
 
         SECTION("std::multimap<json::string_t, json>")
         {
-            std::multimap<json::string_t, json> o = j.get<std::multimap<json::string_t, json>>();
+            std::multimap<json::string_t, json> o =
+                j.get<std::multimap<json::string_t, json>>();
             CHECK(json(o) == j);
         }
 
         SECTION("std::unordered_map<json::string_t, json>")
         {
-            std::unordered_map<json::string_t, json> o = j.get<std::unordered_map<json::string_t, json>>();
+            std::unordered_map<json::string_t, json> o =
+                j.get<std::unordered_map<json::string_t, json>>();
             CHECK(json(o) == j);
         }
 
@@ -79,34 +100,55 @@ TEST_CASE("value conversion")
 
         SECTION("exception in case of a non-object type")
         {
-            CHECK_THROWS_AS(json(json::value_t::null).get<json::object_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::array).get<json::object_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::string).get<json::object_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::object_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::object_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<json::object_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::object_t>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::null).get<json::object_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::array).get<json::object_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::string).get<json::object_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::object_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::object_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(
+                json(json::value_t::number_unsigned).get<json::object_t>(),
+                json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::object_t>(),
+                            json::type_error&);
 
-            CHECK_THROWS_WITH(json(json::value_t::null).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is null");
-            CHECK_THROWS_WITH(json(json::value_t::array).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is array");
-            CHECK_THROWS_WITH(json(json::value_t::string).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is string");
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<json::object_t>(),
+                "[json.exception.type_error.302] type must be object, but is null");
+            CHECK_THROWS_WITH(
+                json(json::value_t::array).get<json::object_t>(),
+                "[json.exception.type_error.302] type must be object, but is array");
+            CHECK_THROWS_WITH(
+                json(json::value_t::string).get<json::object_t>(),
+                "[json.exception.type_error.302] type must be object, but is string");
             CHECK_THROWS_WITH(json(json::value_t::boolean).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is boolean");
-            CHECK_THROWS_WITH(json(json::value_t::number_integer).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_unsigned).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_float).get<json::object_t>(),
-                              "[json.exception.type_error.302] type must be object, but is number");
+                              "[json.exception.type_error.302] type must be object, "
+                              "but is boolean");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_integer).get<json::object_t>(),
+                "[json.exception.type_error.302] type must be object, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_unsigned).get<json::object_t>(),
+                "[json.exception.type_error.302] type must be object, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_float).get<json::object_t>(),
+                "[json.exception.type_error.302] type must be object, but is number");
         }
     }
 
     SECTION("get an object (implicit)")
     {
-        json::object_t o_reference = {{"object", json::object()}, {"array", {1, 2, 3, 4}}, {"number", 42}, {"boolean", false}, {"null", nullptr}, {"string", "Hello world"} };
+        json::object_t o_reference = {{"object", json::object()},
+            {"array", {1, 2, 3, 4}},
+            {"number", 42},
+            {"boolean", false},
+            {"null", nullptr},
+            {"string", "Hello world"}
+        };
         json j(o_reference);
 
         SECTION("json::object_t")
@@ -142,7 +184,8 @@ TEST_CASE("value conversion")
 
     SECTION("get an array (explicit)")
     {
-        json::array_t a_reference {json(1), json(1u), json(2.2), json(false), json("string"), json()};
+        json::array_t a_reference{json(1),     json(1u),       json(2.2),
+                                  json(false), json("string"), json()};
         json j(a_reference);
 
         SECTION("json::array_t")
@@ -162,9 +205,11 @@ TEST_CASE("value conversion")
             std::forward_list<json> a = j.get<std::forward_list<json>>();
             CHECK(json(a) == j);
 
-            CHECK_THROWS_AS(json(json::value_t::null).get<std::forward_list<json>>(), json::type_error&);
-            CHECK_THROWS_WITH(json(json::value_t::null).get<std::forward_list<json>>(),
-                              "[json.exception.type_error.302] type must be array, but is null");
+            CHECK_THROWS_AS(json(json::value_t::null).get<std::forward_list<json>>(),
+                            json::type_error&);
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<std::forward_list<json>>(),
+                "[json.exception.type_error.302] type must be array, but is null");
         }
 
         SECTION("std::vector<json>")
@@ -172,9 +217,11 @@ TEST_CASE("value conversion")
             std::vector<json> a = j.get<std::vector<json>>();
             CHECK(json(a) == j);
 
-            CHECK_THROWS_AS(json(json::value_t::null).get<std::vector<json>>(), json::type_error&);
-            CHECK_THROWS_WITH(json(json::value_t::null).get<std::vector<json>>(),
-                              "[json.exception.type_error.302] type must be array, but is null");
+            CHECK_THROWS_AS(json(json::value_t::null).get<std::vector<json>>(),
+                            json::type_error&);
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<std::vector<json>>(),
+                "[json.exception.type_error.302] type must be array, but is null");
 
 #if not defined(JSON_NOEXCEPTION)
             SECTION("reserve is called on containers that supports it")
@@ -213,36 +260,52 @@ TEST_CASE("value conversion")
 
         SECTION("exception in case of a non-array type")
         {
-            CHECK_THROWS_AS(json(json::value_t::null).get<json::array_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::object).get<json::array_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::string).get<json::array_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::array_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::array_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<json::array_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::array_t>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::null).get<json::array_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::object).get<json::array_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::string).get<json::array_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::array_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::array_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<json::array_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::array_t>(),
+                            json::type_error&);
 
-            CHECK_THROWS_WITH(json(json::value_t::object).get<std::vector<int>>(),
-                              "[json.exception.type_error.302] type must be array, but is object");
-            CHECK_THROWS_WITH(json(json::value_t::null).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is null");
-            CHECK_THROWS_WITH(json(json::value_t::object).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is object");
-            CHECK_THROWS_WITH(json(json::value_t::string).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is string");
-            CHECK_THROWS_WITH(json(json::value_t::boolean).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is boolean");
-            CHECK_THROWS_WITH(json(json::value_t::number_integer).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_unsigned).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_float).get<json::array_t>(),
-                              "[json.exception.type_error.302] type must be array, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::object).get<std::vector<int>>(),
+                "[json.exception.type_error.302] type must be array, but is object");
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is null");
+            CHECK_THROWS_WITH(
+                json(json::value_t::object).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is object");
+            CHECK_THROWS_WITH(
+                json(json::value_t::string).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is string");
+            CHECK_THROWS_WITH(
+                json(json::value_t::boolean).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is boolean");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_integer).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_unsigned).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_float).get<json::array_t>(),
+                "[json.exception.type_error.302] type must be array, but is number");
         }
     }
 
     SECTION("get an array (implicit)")
     {
-        json::array_t a_reference {json(1), json(1u), json(2.2), json(false), json("string"), json()};
+        json::array_t a_reference{json(1),     json(1u),       json(2.2),
+                                  json(false), json("string"), json()};
         json j(a_reference);
 
         SECTION("json::array_t")
@@ -278,7 +341,7 @@ TEST_CASE("value conversion")
 
     SECTION("get a string (explicit)")
     {
-        json::string_t s_reference {"Hello world"};
+        json::string_t s_reference{"Hello world"};
         json j(s_reference);
 
         SECTION("string_t")
@@ -292,37 +355,120 @@ TEST_CASE("value conversion")
             std::string s = j.get<std::string>();
             CHECK(json(s) == j);
         }
+#if defined(JSON_HAS_CPP_17)
+        SECTION("std::string_view")
+        {
+            std::string_view s = j.get<std::string_view>();
+            CHECK(json(s) == j);
+        }
+#endif
 
         SECTION("exception in case of a non-string type")
         {
-            CHECK_THROWS_AS(json(json::value_t::null).get<json::string_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::object).get<json::string_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::array).get<json::string_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::string_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::string_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<json::string_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::string_t>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::null).get<json::string_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::object).get<json::string_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::array).get<json::string_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::string_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::string_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(
+                json(json::value_t::number_unsigned).get<json::string_t>(),
+                json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::string_t>(),
+                            json::type_error&);
 
-            CHECK_THROWS_WITH(json(json::value_t::null).get<json::string_t>(),
-                              "[json.exception.type_error.302] type must be string, but is null");
-            CHECK_THROWS_WITH(json(json::value_t::object).get<json::string_t>(),
-                              "[json.exception.type_error.302] type must be string, but is object");
-            CHECK_THROWS_WITH(json(json::value_t::array).get<json::string_t>(),
-                              "[json.exception.type_error.302] type must be string, but is array");
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<json::string_t>(),
+                "[json.exception.type_error.302] type must be string, but is null");
+            CHECK_THROWS_WITH(
+                json(json::value_t::object).get<json::string_t>(),
+                "[json.exception.type_error.302] type must be string, but is object");
+            CHECK_THROWS_WITH(
+                json(json::value_t::array).get<json::string_t>(),
+                "[json.exception.type_error.302] type must be string, but is array");
             CHECK_THROWS_WITH(json(json::value_t::boolean).get<json::string_t>(),
+                              "[json.exception.type_error.302] type must be string, "
+                              "but is boolean");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_integer).get<json::string_t>(),
+                "[json.exception.type_error.302] type must be string, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_unsigned).get<json::string_t>(),
+                "[json.exception.type_error.302] type must be string, but is number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_float).get<json::string_t>(),
+                "[json.exception.type_error.302] type must be string, but is number");
+        }
+
+#if defined(JSON_HAS_CPP_17)
+        SECTION("exception in case of a non-string type using string_view")
+        {
+            CHECK_THROWS_AS(json(json::value_t::null).get<std::string_view>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::object).get<std::string_view>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::array).get<std::string_view>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::boolean).get<std::string_view>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_integer).get<std::string_view>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<std::string_view>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_float).get<std::string_view>(), json::type_error&);
+
+            CHECK_THROWS_WITH(json(json::value_t::null).get<std::string_view>(),
+                              "[json.exception.type_error.302] type must be string, but is null");
+            CHECK_THROWS_WITH(json(json::value_t::object).get<std::string_view>(),
+                              "[json.exception.type_error.302] type must be string, but is object");
+            CHECK_THROWS_WITH(json(json::value_t::array).get<std::string_view>(),
+                              "[json.exception.type_error.302] type must be string, but is array");
+            CHECK_THROWS_WITH(json(json::value_t::boolean).get<std::string_view>(),
                               "[json.exception.type_error.302] type must be string, but is boolean");
-            CHECK_THROWS_WITH(json(json::value_t::number_integer).get<json::string_t>(),
+            CHECK_THROWS_WITH(json(json::value_t::number_integer).get<std::string_view>(),
                               "[json.exception.type_error.302] type must be string, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_unsigned).get<json::string_t>(),
+            CHECK_THROWS_WITH(json(json::value_t::number_unsigned).get<std::string_view>(),
                               "[json.exception.type_error.302] type must be string, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_float).get<json::string_t>(),
+            CHECK_THROWS_WITH(json(json::value_t::number_float).get<std::string_view>(),
                               "[json.exception.type_error.302] type must be string, but is number");
         }
+#endif
+    }
+
+    SECTION("get null (explicit)")
+    {
+        std::nullptr_t n = nullptr;
+        json j(n);
+
+        auto n2 = j.get<std::nullptr_t>();
+        CHECK(n2 == n);
+
+        CHECK_THROWS_AS(json(json::value_t::string).get<std::nullptr_t>(), json::type_error&);
+        CHECK_THROWS_AS(json(json::value_t::object).get<std::nullptr_t>(), json::type_error&);
+        CHECK_THROWS_AS(json(json::value_t::array).get<std::nullptr_t>(), json::type_error&);
+        CHECK_THROWS_AS(json(json::value_t::boolean).get<std::nullptr_t>(), json::type_error&);
+        CHECK_THROWS_AS(json(json::value_t::number_integer).get<std::nullptr_t>(), json::type_error&);
+        CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<std::nullptr_t>(), json::type_error&);
+        CHECK_THROWS_AS(json(json::value_t::number_float).get<std::nullptr_t>(), json::type_error&);
+
+        CHECK_THROWS_WITH(json(json::value_t::string).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is string");
+        CHECK_THROWS_WITH(json(json::value_t::object).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is object");
+        CHECK_THROWS_WITH(json(json::value_t::array).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is array");
+        CHECK_THROWS_WITH(json(json::value_t::boolean).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is boolean");
+        CHECK_THROWS_WITH(json(json::value_t::number_integer).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is number");
+        CHECK_THROWS_WITH(json(json::value_t::number_unsigned).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is number");
+        CHECK_THROWS_WITH(json(json::value_t::number_float).get<std::nullptr_t>(),
+                          "[json.exception.type_error.302] type must be null, but is number");
+
     }
 
     SECTION("get a string (implicit)")
     {
-        json::string_t s_reference {"Hello world"};
+        json::string_t s_reference{"Hello world"};
         json j(s_reference);
 
         SECTION("string_t")
@@ -331,6 +477,14 @@ TEST_CASE("value conversion")
             CHECK(json(s) == j);
         }
 
+#if defined(JSON_HAS_CPP_17)
+        SECTION("std::string_view")
+        {
+            std::string_view s = j;
+            CHECK(json(s) == j);
+        }
+#endif
+
         SECTION("std::string")
         {
             std::string s = j;
@@ -340,7 +494,7 @@ TEST_CASE("value conversion")
 
     SECTION("get a boolean (explicit)")
     {
-        json::boolean_t b_reference {true};
+        json::boolean_t b_reference{true};
         json j(b_reference);
 
         SECTION("boolean_t")
@@ -357,34 +511,53 @@ TEST_CASE("value conversion")
 
         SECTION("exception in case of a non-string type")
         {
-            CHECK_THROWS_AS(json(json::value_t::null).get<json::boolean_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::object).get<json::boolean_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::array).get<json::boolean_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::string).get<json::boolean_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_integer).get<json::boolean_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_unsigned).get<json::boolean_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::boolean_t>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::null).get<json::boolean_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::object).get<json::boolean_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::array).get<json::boolean_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::string).get<json::boolean_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(
+                json(json::value_t::number_integer).get<json::boolean_t>(),
+                json::type_error&);
+            CHECK_THROWS_AS(
+                json(json::value_t::number_unsigned).get<json::boolean_t>(),
+                json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::number_float).get<json::boolean_t>(),
+                            json::type_error&);
 
-            CHECK_THROWS_WITH(json(json::value_t::null).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is null");
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<json::boolean_t>(),
+                "[json.exception.type_error.302] type must be boolean, but is null");
             CHECK_THROWS_WITH(json(json::value_t::object).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is object");
-            CHECK_THROWS_WITH(json(json::value_t::array).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is array");
+                              "[json.exception.type_error.302] type must be boolean, "
+                              "but is object");
+            CHECK_THROWS_WITH(
+                json(json::value_t::array).get<json::boolean_t>(),
+                "[json.exception.type_error.302] type must be boolean, but is array");
             CHECK_THROWS_WITH(json(json::value_t::string).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is string");
-            CHECK_THROWS_WITH(json(json::value_t::number_integer).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_unsigned).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is number");
-            CHECK_THROWS_WITH(json(json::value_t::number_float).get<json::boolean_t>(),
-                              "[json.exception.type_error.302] type must be boolean, but is number");
+                              "[json.exception.type_error.302] type must be boolean, "
+                              "but is string");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_integer).get<json::boolean_t>(),
+                "[json.exception.type_error.302] type must be boolean, but is "
+                "number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_unsigned).get<json::boolean_t>(),
+                "[json.exception.type_error.302] type must be boolean, but is "
+                "number");
+            CHECK_THROWS_WITH(
+                json(json::value_t::number_float).get<json::boolean_t>(),
+                "[json.exception.type_error.302] type must be boolean, but is "
+                "number");
         }
     }
 
     SECTION("get a boolean (implicit)")
     {
-        json::boolean_t b_reference {true};
+        json::boolean_t b_reference{true};
         json j(b_reference);
 
         SECTION("boolean_t")
@@ -402,9 +575,9 @@ TEST_CASE("value conversion")
 
     SECTION("get an integer number (explicit)")
     {
-        json::number_integer_t n_reference {42};
+        json::number_integer_t n_reference{42};
         json j(n_reference);
-        json::number_unsigned_t n_unsigned_reference {42u};
+        json::number_unsigned_t n_unsigned_reference{42u};
         json j_unsigned(n_unsigned_reference);
 
         SECTION("number_integer_t")
@@ -613,33 +786,47 @@ TEST_CASE("value conversion")
 
         SECTION("exception in case of a non-number type")
         {
-            CHECK_THROWS_AS(json(json::value_t::null).get<json::number_integer_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::object).get<json::number_integer_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::array).get<json::number_integer_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::string).get<json::number_integer_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::number_integer_t>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::null).get<json::number_integer_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::object).get<json::number_integer_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::array).get<json::number_integer_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::string).get<json::number_integer_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(
+                json(json::value_t::boolean).get<json::number_integer_t>(),
+                json::type_error&);
 
-            CHECK_THROWS_WITH(json(json::value_t::null).get<json::number_integer_t>(),
-                              "[json.exception.type_error.302] type must be number, but is null");
-            CHECK_THROWS_WITH(json(json::value_t::object).get<json::number_integer_t>(),
-                              "[json.exception.type_error.302] type must be number, but is object");
-            CHECK_THROWS_WITH(json(json::value_t::array).get<json::number_integer_t>(),
-                              "[json.exception.type_error.302] type must be number, but is array");
-            CHECK_THROWS_WITH(json(json::value_t::string).get<json::number_integer_t>(),
-                              "[json.exception.type_error.302] type must be number, but is string");
-            CHECK_THROWS_WITH(json(json::value_t::boolean).get<json::number_integer_t>(),
-                              "[json.exception.type_error.302] type must be number, but is boolean");
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<json::number_integer_t>(),
+                "[json.exception.type_error.302] type must be number, but is null");
+            CHECK_THROWS_WITH(
+                json(json::value_t::object).get<json::number_integer_t>(),
+                "[json.exception.type_error.302] type must be number, but is object");
+            CHECK_THROWS_WITH(
+                json(json::value_t::array).get<json::number_integer_t>(),
+                "[json.exception.type_error.302] type must be number, but is array");
+            CHECK_THROWS_WITH(
+                json(json::value_t::string).get<json::number_integer_t>(),
+                "[json.exception.type_error.302] type must be number, but is string");
+            CHECK_THROWS_WITH(
+                json(json::value_t::boolean).get<json::number_integer_t>(),
+                "[json.exception.type_error.302] type must be number, but is "
+                "boolean");
 
-            CHECK_NOTHROW(json(json::value_t::number_float).get<json::number_integer_t>());
-            CHECK_NOTHROW(json(json::value_t::number_float).get<json::number_unsigned_t>());
+            CHECK_NOTHROW(
+                json(json::value_t::number_float).get<json::number_integer_t>());
+            CHECK_NOTHROW(
+                json(json::value_t::number_float).get<json::number_unsigned_t>());
         }
     }
 
     SECTION("get an integer number (implicit)")
     {
-        json::number_integer_t n_reference {42};
+        json::number_integer_t n_reference{42};
         json j(n_reference);
-        json::number_unsigned_t n_unsigned_reference {42u};
+        json::number_unsigned_t n_unsigned_reference{42u};
         json j_unsigned(n_unsigned_reference);
 
         SECTION("number_integer_t")
@@ -849,7 +1036,7 @@ TEST_CASE("value conversion")
 
     SECTION("get a floating-point number (explicit)")
     {
-        json::number_float_t n_reference {42.23};
+        json::number_float_t n_reference{42.23};
         json j(n_reference);
 
         SECTION("number_float_t")
@@ -872,31 +1059,44 @@ TEST_CASE("value conversion")
 
         SECTION("exception in case of a non-string type")
         {
-            CHECK_THROWS_AS(json(json::value_t::null).get<json::number_float_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::object).get<json::number_float_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::array).get<json::number_float_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::string).get<json::number_float_t>(), json::type_error&);
-            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::number_float_t>(), json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::null).get<json::number_float_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::object).get<json::number_float_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::array).get<json::number_float_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::string).get<json::number_float_t>(),
+                            json::type_error&);
+            CHECK_THROWS_AS(json(json::value_t::boolean).get<json::number_float_t>(),
+                            json::type_error&);
 
-            CHECK_THROWS_WITH(json(json::value_t::null).get<json::number_float_t>(),
-                              "[json.exception.type_error.302] type must be number, but is null");
-            CHECK_THROWS_WITH(json(json::value_t::object).get<json::number_float_t>(),
-                              "[json.exception.type_error.302] type must be number, but is object");
-            CHECK_THROWS_WITH(json(json::value_t::array).get<json::number_float_t>(),
-                              "[json.exception.type_error.302] type must be number, but is array");
-            CHECK_THROWS_WITH(json(json::value_t::string).get<json::number_float_t>(),
-                              "[json.exception.type_error.302] type must be number, but is string");
-            CHECK_THROWS_WITH(json(json::value_t::boolean).get<json::number_float_t>(),
-                              "[json.exception.type_error.302] type must be number, but is boolean");
+            CHECK_THROWS_WITH(
+                json(json::value_t::null).get<json::number_float_t>(),
+                "[json.exception.type_error.302] type must be number, but is null");
+            CHECK_THROWS_WITH(
+                json(json::value_t::object).get<json::number_float_t>(),
+                "[json.exception.type_error.302] type must be number, but is object");
+            CHECK_THROWS_WITH(
+                json(json::value_t::array).get<json::number_float_t>(),
+                "[json.exception.type_error.302] type must be number, but is array");
+            CHECK_THROWS_WITH(
+                json(json::value_t::string).get<json::number_float_t>(),
+                "[json.exception.type_error.302] type must be number, but is string");
+            CHECK_THROWS_WITH(
+                json(json::value_t::boolean).get<json::number_float_t>(),
+                "[json.exception.type_error.302] type must be number, but is "
+                "boolean");
 
-            CHECK_NOTHROW(json(json::value_t::number_integer).get<json::number_float_t>());
-            CHECK_NOTHROW(json(json::value_t::number_unsigned).get<json::number_float_t>());
+            CHECK_NOTHROW(
+                json(json::value_t::number_integer).get<json::number_float_t>());
+            CHECK_NOTHROW(
+                json(json::value_t::number_unsigned).get<json::number_float_t>());
         }
     }
 
     SECTION("get a floating-point number (implicit)")
     {
-        json::number_float_t n_reference {42.23};
+        json::number_float_t n_reference{42.23};
         json j(n_reference);
 
         SECTION("number_float_t")
@@ -953,7 +1153,7 @@ TEST_CASE("value conversion")
                 j3.get<std::unordered_map<std::string, double>>();
                 j4.get<std::unordered_map<std::string, bool>>();
                 j5.get<std::unordered_map<std::string, std::string>>();
-                //CHECK(m5["one"] == "eins");
+                // CHECK(m5["one"] == "eins");
             }
 
             SECTION("std::multimap")
@@ -963,7 +1163,7 @@ TEST_CASE("value conversion")
                 j3.get<std::multimap<std::string, double>>();
                 j4.get<std::multimap<std::string, bool>>();
                 j5.get<std::multimap<std::string, std::string>>();
-                //CHECK(m5["one"] == "eins");
+                // CHECK(m5["one"] == "eins");
             }
 
             SECTION("std::unordered_multimap")
@@ -973,13 +1173,16 @@ TEST_CASE("value conversion")
                 j3.get<std::unordered_multimap<std::string, double>>();
                 j4.get<std::unordered_multimap<std::string, bool>>();
                 j5.get<std::unordered_multimap<std::string, std::string>>();
-                //CHECK(m5["one"] == "eins");
+                // CHECK(m5["one"] == "eins");
             }
 
             SECTION("exception in case of a non-object type")
             {
-                CHECK_THROWS_AS((json().get<std::map<std::string, int>>()), json::type_error&);
-                CHECK_THROWS_WITH((json().get<std::map<std::string, int>>()), "[json.exception.type_error.302] type must be object, but is null");
+                CHECK_THROWS_AS((json().get<std::map<std::string, int>>()),
+                                json::type_error&);
+                CHECK_THROWS_WITH(
+                    (json().get<std::map<std::string, int>>()),
+                    "[json.exception.type_error.302] type must be object, but is null");
             }
         }
 
@@ -1021,7 +1224,8 @@ TEST_CASE("value conversion")
                 {
                     std::array<int, 6> arr6 = {{1, 2, 3, 4, 5, 6}};
                     CHECK_THROWS_AS(arr6 = j1, json::out_of_range&);
-                    CHECK_THROWS_WITH(arr6 = j1, "[json.exception.out_of_range.401] array index 4 is out of range");
+                    CHECK_THROWS_WITH(arr6 = j1, "[json.exception.out_of_range.401] "
+                                      "array index 4 is out of range");
                 }
 
                 SECTION("std::array is smaller than JSON")
@@ -1078,6 +1282,60 @@ TEST_CASE("value conversion")
                 j5.get<std::unordered_set<std::string>>();
             }
 
+            SECTION("std::map (array of pairs)")
+            {
+                std::map<int, int> m{{0, 1}, {1, 2}, {2, 3}};
+                json j6 = m;
+
+                auto m2 = j6.get<std::map<int, int>>();
+                CHECK(m == m2);
+
+                json j7 = {0, 1, 2, 3};
+                json j8 = 2;
+                CHECK_THROWS_AS((j7.get<std::map<int, int>>()), json::type_error&);
+                CHECK_THROWS_AS((j8.get<std::map<int, int>>()), json::type_error&);
+                CHECK_THROWS_WITH((j7.get<std::map<int, int>>()),
+                                  "[json.exception.type_error.302] type must be array, "
+                                  "but is number");
+                CHECK_THROWS_WITH((j8.get<std::map<int, int>>()),
+                                  "[json.exception.type_error.302] type must be array, "
+                                  "but is number");
+
+                SECTION("superfluous entries")
+                {
+                    json j9 = {{0, 1, 2}, {1, 2, 3}, {2, 3, 4}};
+                    m2 = j9.get<std::map<int, int>>();
+                    CHECK(m == m2);
+                }
+            }
+
+            SECTION("std::unordered_map (array of pairs)")
+            {
+                std::unordered_map<int, int> m{{0, 1}, {1, 2}, {2, 3}};
+                json j6 = m;
+
+                auto m2 = j6.get<std::unordered_map<int, int>>();
+                CHECK(m == m2);
+
+                json j7 = {0, 1, 2, 3};
+                json j8 = 2;
+                CHECK_THROWS_AS((j7.get<std::unordered_map<int, int>>()), json::type_error&);
+                CHECK_THROWS_AS((j8.get<std::unordered_map<int, int>>()), json::type_error&);
+                CHECK_THROWS_WITH((j7.get<std::unordered_map<int, int>>()),
+                                  "[json.exception.type_error.302] type must be array, "
+                                  "but is number");
+                CHECK_THROWS_WITH((j8.get<std::unordered_map<int, int>>()),
+                                  "[json.exception.type_error.302] type must be array, "
+                                  "but is number");
+
+                SECTION("superfluous entries")
+                {
+                    json j9{{0, 1, 2}, {1, 2, 3}, {2, 3, 4}};
+                    m2 = j9.get<std::unordered_map<int, int>>();
+                    CHECK(m == m2);
+                }
+            }
+
             SECTION("exception in case of a non-object type")
             {
                 CHECK_THROWS_AS((json().get<std::list<int>>()), json::type_error&);
@@ -1088,11 +1346,24 @@ TEST_CASE("value conversion")
 
                 // does type really must be an array? or it rather must not be null?
                 // that's what I thought when other test like this one broke
-                CHECK_THROWS_WITH((json().get<std::list<int>>()), "[json.exception.type_error.302] type must be array, but is null");
-                CHECK_THROWS_WITH((json().get<std::vector<int>>()), "[json.exception.type_error.302] type must be array, but is null");
-                CHECK_THROWS_WITH((json().get<std::vector<json>>()), "[json.exception.type_error.302] type must be array, but is null");
-                CHECK_THROWS_WITH((json().get<std::list<json>>()), "[json.exception.type_error.302] type must be array, but is null");
-                CHECK_THROWS_WITH((json().get<std::valarray<int>>()), "[json.exception.type_error.302] type must be array, but is null");
+                CHECK_THROWS_WITH(
+                    (json().get<std::list<int>>()),
+                    "[json.exception.type_error.302] type must be array, but is null");
+                CHECK_THROWS_WITH(
+                    (json().get<std::vector<int>>()),
+                    "[json.exception.type_error.302] type must be array, but is null");
+                CHECK_THROWS_WITH(
+                    (json().get<std::vector<json>>()),
+                    "[json.exception.type_error.302] type must be array, but is null");
+                CHECK_THROWS_WITH(
+                    (json().get<std::list<json>>()),
+                    "[json.exception.type_error.302] type must be array, but is null");
+                CHECK_THROWS_WITH(
+                    (json().get<std::valarray<int>>()),
+                    "[json.exception.type_error.302] type must be array, but is null");
+                CHECK_THROWS_WITH(
+                    (json().get<std::map<int, int>>()),
+                    "[json.exception.type_error.302] type must be array, but is null");
             }
         }
     }
diff --git a/test/src/unit-deserialization.cpp b/test/src/unit-deserialization.cpp
index 2886f009..4f9970ab 100644
--- a/test/src/unit-deserialization.cpp
+++ b/test/src/unit-deserialization.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -34,18 +35,162 @@ using nlohmann::json;
 #include <iostream>
 #include <valarray>
 
+struct SaxEventLogger : public nlohmann::json_sax<json>
+{
+    bool null() override
+    {
+        events.push_back("null()");
+        return true;
+    }
+
+    bool boolean(bool val) override
+    {
+        events.push_back(val ? "boolean(true)" : "boolean(false)");
+        return true;
+    }
+
+    bool number_integer(json::number_integer_t val) override
+    {
+        events.push_back("number_integer(" + std::to_string(val) + ")");
+        return true;
+    }
+
+    bool number_unsigned(json::number_unsigned_t val) override
+    {
+        events.push_back("number_unsigned(" + std::to_string(val) + ")");
+        return true;
+    }
+
+    bool number_float(json::number_float_t, const std::string& s) override
+    {
+        events.push_back("number_float(" + s + ")");
+        return true;
+    }
+
+    bool string(std::string& val) override
+    {
+        events.push_back("string(" + val + ")");
+        return true;
+    }
+
+    bool start_object(std::size_t elements) override
+    {
+        if (elements == std::size_t(-1))
+        {
+            events.push_back("start_object()");
+        }
+        else
+        {
+            events.push_back("start_object(" + std::to_string(elements) + ")");
+        }
+        return true;
+    }
+
+    bool key(std::string& val) override
+    {
+        events.push_back("key(" + val + ")");
+        return true;
+    }
+
+    bool end_object() override
+    {
+        events.push_back("end_object()");
+        return true;
+    }
+
+    bool start_array(std::size_t elements) override
+    {
+        if (elements == std::size_t(-1))
+        {
+            events.push_back("start_array()");
+        }
+        else
+        {
+            events.push_back("start_array(" + std::to_string(elements) + ")");
+        }
+        return true;
+    }
+
+    bool end_array() override
+    {
+        events.push_back("end_array()");
+        return true;
+    }
+
+    bool parse_error(std::size_t position, const std::string&, const json::exception&) override
+    {
+        events.push_back("parse_error(" + std::to_string(position) + ")");
+        return false;
+    }
+
+    std::vector<std::string> events;
+};
+
+struct SaxEventLoggerExitAfterStartObject : public SaxEventLogger
+{
+    bool start_object(std::size_t elements) override
+    {
+        if (elements == std::size_t(-1))
+        {
+            events.push_back("start_object()");
+        }
+        else
+        {
+            events.push_back("start_object(" + std::to_string(elements) + ")");
+        }
+        return false;
+    }
+};
+
+struct SaxEventLoggerExitAfterKey : public SaxEventLogger
+{
+    bool key(std::string& val) override
+    {
+        events.push_back("key(" + val + ")");
+        return false;
+    }
+};
+
+struct SaxEventLoggerExitAfterStartArray : public SaxEventLogger
+{
+    bool start_array(std::size_t elements) override
+    {
+        if (elements == std::size_t(-1))
+        {
+            events.push_back("start_array()");
+        }
+        else
+        {
+            events.push_back("start_array(" + std::to_string(elements) + ")");
+        }
+        return false;
+    }
+};
+
 TEST_CASE("deserialization")
 {
     SECTION("successful deserialization")
     {
         SECTION("stream")
         {
-            std::stringstream ss1, ss2;
+            std::stringstream ss1, ss2, ss3;
             ss1 << "[\"foo\",1,2,3,false,{\"one\":1}]";
             ss2 << "[\"foo\",1,2,3,false,{\"one\":1}]";
+            ss3 << "[\"foo\",1,2,3,false,{\"one\":1}]";
             json j = json::parse(ss1);
             CHECK(json::accept(ss2));
             CHECK(j == json({"foo", 1, 2, 3, false, {{"one", 1}}}));
+
+            SaxEventLogger l;
+            CHECK(json::sax_parse(ss3, &l));
+            CHECK(l.events.size() == 11);
+            CHECK(l.events == std::vector<std::string>(
+            {
+                "start_array()", "string(foo)", "number_unsigned(1)",
+                "number_unsigned(2)", "number_unsigned(3)", "boolean(false)",
+                "start_object()", "key(one)", "number_unsigned(1)",
+                "end_object()", "end_array()"
+            }));
         }
 
         SECTION("string literal")
@@ -54,6 +199,17 @@ TEST_CASE("deserialization")
             json j = json::parse(s);
             CHECK(json::accept(s));
             CHECK(j == json({"foo", 1, 2, 3, false, {{"one", 1}}}));
+
+            SaxEventLogger l;
+            CHECK(json::sax_parse(s, &l));
+            CHECK(l.events.size() == 11);
+            CHECK(l.events == std::vector<std::string>(
+            {
+                "start_array()", "string(foo)", "number_unsigned(1)",
+                "number_unsigned(2)", "number_unsigned(3)", "boolean(false)",
+                "start_object()", "key(one)", "number_unsigned(1)",
+                "end_object()", "end_array()"
+            }));
         }
 
         SECTION("string_t")
@@ -62,6 +218,17 @@ TEST_CASE("deserialization")
             json j = json::parse(s);
             CHECK(json::accept(s));
             CHECK(j == json({"foo", 1, 2, 3, false, {{"one", 1}}}));
+
+            SaxEventLogger l;
+            CHECK(json::sax_parse(s, &l));
+            CHECK(l.events.size() == 11);
+            CHECK(l.events == std::vector<std::string>(
+            {
+                "start_array()", "string(foo)", "number_unsigned(1)",
+                "number_unsigned(2)", "number_unsigned(3)", "boolean(false)",
+                "start_object()", "key(one)", "number_unsigned(1)",
+                "end_object()", "end_array()"
+            }));
         }
 
         SECTION("operator<<")
@@ -92,19 +259,31 @@ TEST_CASE("deserialization")
     {
         SECTION("stream")
         {
-            std::stringstream ss1, ss2, ss3, ss4;
+            std::stringstream ss1, ss2, ss3, ss4, ss5;
             ss1 << "[\"foo\",1,2,3,false,{\"one\":1}";
             ss2 << "[\"foo\",1,2,3,false,{\"one\":1}";
             ss3 << "[\"foo\",1,2,3,false,{\"one\":1}";
             ss4 << "[\"foo\",1,2,3,false,{\"one\":1}";
+            ss5 << "[\"foo\",1,2,3,false,{\"one\":1}";
             CHECK_THROWS_AS(json::parse(ss1), json::parse_error&);
             CHECK_THROWS_WITH(json::parse(ss2),
                               "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
             CHECK(not json::accept(ss3));
 
             json j_error;
-            CHECK_NOTHROW(j_error = json::parse(ss1, nullptr, false));
+            CHECK_NOTHROW(j_error = json::parse(ss4, nullptr, false));
             CHECK(j_error.is_discarded());
+
+            SaxEventLogger l;
+            CHECK(not json::sax_parse(ss5, &l));
+            CHECK(l.events.size() == 11);
+            CHECK(l.events == std::vector<std::string>(
+            {
+                "start_array()", "string(foo)", "number_unsigned(1)",
+                "number_unsigned(2)", "number_unsigned(3)", "boolean(false)",
+                "start_object()", "key(one)", "number_unsigned(1)",
+                "end_object()", "parse_error(29)"
+            }));
         }
 
         SECTION("string")
@@ -118,6 +297,17 @@ TEST_CASE("deserialization")
             json j_error;
             CHECK_NOTHROW(j_error = json::parse(s, nullptr, false));
             CHECK(j_error.is_discarded());
+
+            SaxEventLogger l;
+            CHECK(not json::sax_parse(s, &l));
+            CHECK(l.events.size() == 11);
+            CHECK(l.events == std::vector<std::string>(
+            {
+                "start_array()", "string(foo)", "number_unsigned(1)",
+                "number_unsigned(2)", "number_unsigned(3)", "boolean(false)",
+                "start_object()", "key(one)", "number_unsigned(1)",
+                "end_object()", "parse_error(29)"
+            }));
         }
 
         SECTION("operator<<")
@@ -159,6 +349,11 @@ TEST_CASE("deserialization")
                 std::vector<uint8_t> v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(v) == json(true));
                 CHECK(json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from std::array")
@@ -166,6 +361,11 @@ TEST_CASE("deserialization")
                 std::array<uint8_t, 5> v { {'t', 'r', 'u', 'e'} };
                 CHECK(json::parse(v) == json(true));
                 CHECK(json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from array")
@@ -173,6 +373,11 @@ TEST_CASE("deserialization")
                 uint8_t v[] = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(v) == json(true));
                 CHECK(json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from chars")
@@ -185,6 +390,12 @@ TEST_CASE("deserialization")
                 v[4] = '\0';
                 CHECK(json::parse(v) == json(true));
                 CHECK(json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
+
                 delete[] v;
             }
 
@@ -193,6 +404,11 @@ TEST_CASE("deserialization")
                 std::string v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(v) == json(true));
                 CHECK(json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from std::initializer_list")
@@ -200,6 +416,11 @@ TEST_CASE("deserialization")
                 std::initializer_list<uint8_t> v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(v) == json(true));
                 CHECK(json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("empty container")
@@ -207,6 +428,11 @@ TEST_CASE("deserialization")
                 std::vector<uint8_t> v;
                 CHECK_THROWS_AS(json::parse(v), json::parse_error&);
                 CHECK(not json::accept(v));
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(v, &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(1)"}));
             }
         }
 
@@ -217,6 +443,12 @@ TEST_CASE("deserialization")
                 std::vector<uint8_t> v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
                 CHECK(json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
+
             }
 
             SECTION("from std::array")
@@ -224,6 +456,11 @@ TEST_CASE("deserialization")
                 std::array<uint8_t, 5> v { {'t', 'r', 'u', 'e'} };
                 CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
                 CHECK(json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from array")
@@ -231,6 +468,11 @@ TEST_CASE("deserialization")
                 uint8_t v[] = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
                 CHECK(json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from std::string")
@@ -238,6 +480,11 @@ TEST_CASE("deserialization")
                 std::string v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
                 CHECK(json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from std::initializer_list")
@@ -245,6 +492,11 @@ TEST_CASE("deserialization")
                 std::initializer_list<uint8_t> v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
                 CHECK(json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("from std::valarray")
@@ -252,6 +504,11 @@ TEST_CASE("deserialization")
                 std::valarray<uint8_t> v = {'t', 'r', 'u', 'e'};
                 CHECK(json::parse(std::begin(v), std::end(v)) == json(true));
                 CHECK(json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"boolean(true)"}));
             }
 
             SECTION("with empty range")
@@ -259,6 +516,11 @@ TEST_CASE("deserialization")
                 std::vector<uint8_t> v;
                 CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error&);
                 CHECK(not json::accept(std::begin(v), std::end(v)));
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(1)"}));
             }
         }
 
@@ -274,6 +536,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(10)"}));
             }
 
             SECTION("case 2")
@@ -285,6 +552,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(11)"}));
             }
 
             SECTION("case 3")
@@ -296,6 +568,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(18)"}));
             }
 
             SECTION("case 4")
@@ -307,6 +584,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(18)"}));
             }
 
             SECTION("case 5")
@@ -318,6 +600,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(3)"}));
             }
 
             SECTION("case 6")
@@ -331,6 +618,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 7")
@@ -342,6 +634,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 8")
@@ -353,6 +650,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 9")
@@ -364,6 +666,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 10")
@@ -375,6 +682,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 11")
@@ -386,6 +698,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 12")
@@ -397,6 +714,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 13")
@@ -408,6 +730,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 14")
@@ -419,6 +746,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 15")
@@ -430,6 +762,11 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 1);
+                CHECK(l.events == std::vector<std::string>({"parse_error(4)"}));
             }
 
             SECTION("case 16")
@@ -441,6 +778,15 @@ TEST_CASE("deserialization")
                 json j_error;
                 CHECK_NOTHROW(j_error = json::parse(std::begin(v), std::end(v), nullptr, false));
                 CHECK(j_error.is_discarded());
+
+                SaxEventLogger l;
+                CHECK(not json::sax_parse(std::begin(v), std::end(v), &l));
+                CHECK(l.events.size() == 4);
+                CHECK(l.events == std::vector<std::string>(
+                {
+                    "start_object()", "key()", "number_unsigned(11)",
+                    "parse_error(7)"
+                }));
             }
         }
     }
@@ -453,39 +799,89 @@ TEST_CASE("deserialization")
         {
             CHECK_THROWS_AS(json::parse(bom), json::parse_error&);
             CHECK_THROWS_WITH(json::parse(bom),
-                              "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                              "[json.exception.parse_error.101] parse error at 4: syntax error - unexpected end of input; expected '[', '{', or a literal");
 
             CHECK_THROWS_AS(json::parse(std::istringstream(bom)), json::parse_error&);
             CHECK_THROWS_WITH(json::parse(std::istringstream(bom)),
-                              "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                              "[json.exception.parse_error.101] parse error at 4: syntax error - unexpected end of input; expected '[', '{', or a literal");
+
+            SaxEventLogger l;
+            CHECK(not json::sax_parse(bom, &l));
+            CHECK(l.events.size() == 1);
+            CHECK(l.events == std::vector<std::string>(
+            {
+                "parse_error(4)"
+            }));
         }
 
         SECTION("BOM and content")
         {
             CHECK(json::parse(bom + "1") == 1);
             CHECK(json::parse(std::istringstream(bom + "1")) == 1);
+
+            SaxEventLogger l1, l2;
+            CHECK(json::sax_parse(std::istringstream(bom + "1"), &l1));
+            CHECK(json::sax_parse(bom + "1", &l2));
+            CHECK(l1.events.size() == 1);
+            CHECK(l1.events == std::vector<std::string>(
+            {
+                "number_unsigned(1)"
+            }));
+            CHECK(l2.events.size() == 1);
+            CHECK(l2.events == std::vector<std::string>(
+            {
+                "number_unsigned(1)"
+            }));
         }
 
         SECTION("2 byte of BOM")
         {
             CHECK_THROWS_AS(json::parse(bom.substr(0, 2)), json::parse_error&);
-            CHECK_THROWS_WITH(json::parse(bom),
-                              "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input; expected '[', '{', or a literal");
+            CHECK_THROWS_WITH(json::parse(bom.substr(0, 2)),
+                              "[json.exception.parse_error.101] parse error at 3: syntax error - invalid BOM; must be 0xEF 0xBB 0xBF if given; last read: '\xEF\xBB'");
 
             CHECK_THROWS_AS(json::parse(std::istringstream(bom.substr(0, 2))), json::parse_error&);
-            CHECK_THROWS_WITH(json::parse(std::istringstream(bom)),
-                              "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input; expected '[', '{', or a literal");
+            CHECK_THROWS_WITH(json::parse(std::istringstream(bom.substr(0, 2))),
+                              "[json.exception.parse_error.101] parse error at 3: syntax error - invalid BOM; must be 0xEF 0xBB 0xBF if given; last read: '\xEF\xBB'");
+
+            SaxEventLogger l1, l2;
+            CHECK(not json::sax_parse(std::istringstream(bom.substr(0, 2)), &l1));
+            CHECK(not json::sax_parse(bom.substr(0, 2), &l2));
+            CHECK(l1.events.size() == 1);
+            CHECK(l1.events == std::vector<std::string>(
+            {
+                "parse_error(3)"
+            }));
+            CHECK(l2.events.size() == 1);
+            CHECK(l2.events == std::vector<std::string>(
+            {
+                "parse_error(3)"
+            }));
         }
 
         SECTION("1 byte of BOM")
         {
             CHECK_THROWS_AS(json::parse(bom.substr(0, 1)), json::parse_error&);
-            CHECK_THROWS_WITH(json::parse(bom),
-                              "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input; expected '[', '{', or a literal");
+            CHECK_THROWS_WITH(json::parse(bom.substr(0, 1)),
+                              "[json.exception.parse_error.101] parse error at 2: syntax error - invalid BOM; must be 0xEF 0xBB 0xBF if given; last read: '\xEF'");
 
             CHECK_THROWS_AS(json::parse(std::istringstream(bom.substr(0, 1))), json::parse_error&);
-            CHECK_THROWS_WITH(json::parse(std::istringstream(bom)),
-                              "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected end of input; expected '[', '{', or a literal");
+            CHECK_THROWS_WITH(json::parse(std::istringstream(bom.substr(0, 1))),
+                              "[json.exception.parse_error.101] parse error at 2: syntax error - invalid BOM; must be 0xEF 0xBB 0xBF if given; last read: '\xEF'");
+
+            SaxEventLogger l1, l2;
+            CHECK(not json::sax_parse(std::istringstream(bom.substr(0, 1)), &l1));
+            CHECK(not json::sax_parse(bom.substr(0, 1), &l2));
+            CHECK(l1.events.size() == 1);
+            CHECK(l1.events == std::vector<std::string>(
+            {
+                "parse_error(2)"
+            }));
+            CHECK(l2.events.size() == 1);
+            CHECK(l2.events == std::vector<std::string>(
+            {
+                "parse_error(2)"
+            }));
         }
 
         SECTION("variations")
@@ -513,12 +909,46 @@ TEST_CASE("deserialization")
                             // without any variation, we skip the BOM
                             CHECK(json::parse(s + "null") == json());
                             CHECK(json::parse(std::istringstream(s + "null")) == json());
+
+                            SaxEventLogger l;
+                            CHECK(json::sax_parse(s + "null", &l));
+                            CHECK(l.events.size() == 1);
+                            CHECK(l.events == std::vector<std::string>(
+                            {
+                                "null()"
+                            }));
                         }
                         else
                         {
                             // any variation is an error
                             CHECK_THROWS_AS(json::parse(s + "null"), json::parse_error&);
                             CHECK_THROWS_AS(json::parse(std::istringstream(s + "null")), json::parse_error&);
+
+                            SaxEventLogger l;
+                            CHECK(not json::sax_parse(s + "null", &l));
+                            CHECK(l.events.size() == 1);
+
+                            if (i0 != 0)
+                            {
+                                CHECK(l.events == std::vector<std::string>(
+                                {
+                                    "parse_error(1)"
+                                }));
+                            }
+                            else if (i1 != 0)
+                            {
+                                CHECK(l.events == std::vector<std::string>(
+                                {
+                                    "parse_error(2)"
+                                }));
+                            }
+                            else
+                            {
+                                CHECK(l.events == std::vector<std::string>(
+                                {
+                                    "parse_error(3)"
+                                }));
+                            }
                         }
                     }
                 }
@@ -535,4 +965,49 @@ TEST_CASE("deserialization")
             CHECK(j == 456);
         }
     }
+
+    SECTION("SAX and early abort")
+    {
+        std::string s = "[1, [\"string\", 43.12], null, {\"key1\": true, \"key2\": false}]";
+
+        SaxEventLogger default_logger;
+        SaxEventLoggerExitAfterStartObject exit_after_start_object;
+        SaxEventLoggerExitAfterKey exit_after_key;
+        SaxEventLoggerExitAfterStartArray exit_after_start_array;
+
+        json::sax_parse(s, &default_logger);
+        CHECK(default_logger.events.size() == 14);
+        CHECK(default_logger.events == std::vector<std::string>(
+        {
+            "start_array()", "number_unsigned(1)", "start_array()",
+            "string(string)", "number_float(43.12)", "end_array()", "null()",
+            "start_object()", "key(key1)", "boolean(true)", "key(key2)",
+            "boolean(false)", "end_object()", "end_array()"
+        }));
+
+        json::sax_parse(s, &exit_after_start_object);
+        CHECK(exit_after_start_object.events.size() == 8);
+        CHECK(exit_after_start_object.events == std::vector<std::string>(
+        {
+            "start_array()", "number_unsigned(1)", "start_array()",
+            "string(string)", "number_float(43.12)", "end_array()", "null()",
+            "start_object()"
+        }));
+
+        json::sax_parse(s, &exit_after_key);
+        CHECK(exit_after_key.events.size() == 9);
+        CHECK(exit_after_key.events == std::vector<std::string>(
+        {
+            "start_array()", "number_unsigned(1)", "start_array()",
+            "string(string)", "number_float(43.12)", "end_array()", "null()",
+            "start_object()", "key(key1)"
+        }));
+
+        json::sax_parse(s, &exit_after_start_array);
+        CHECK(exit_after_start_array.events.size() == 1);
+        CHECK(exit_after_start_array.events == std::vector<std::string>(
+        {
+            "start_array()"
+        }));
+    }
 }
diff --git a/test/src/unit-element_access1.cpp b/test/src/unit-element_access1.cpp
index d06b97ca..2954d696 100644
--- a/test/src/unit-element_access1.cpp
+++ b/test/src/unit-element_access1.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-element_access2.cpp b/test/src/unit-element_access2.cpp
index 5ea4b8a5..41ec42be 100644
--- a/test/src/unit-element_access2.cpp
+++ b/test/src/unit-element_access2.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-inspection.cpp b/test/src/unit-inspection.cpp
index 111e6ea2..8e42c6ec 100644
--- a/test/src/unit-inspection.cpp
+++ b/test/src/unit-inspection.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-items.cpp b/test/src/unit-items.cpp
index 8f18884d..69637ee8 100644
--- a/test/src/unit-items.cpp
+++ b/test/src/unit-items.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-iterators1.cpp b/test/src/unit-iterators1.cpp
index c8125ce7..8c3417d5 100644
--- a/test/src/unit-iterators1.cpp
+++ b/test/src/unit-iterators1.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-iterators2.cpp b/test/src/unit-iterators2.cpp
index 2d369881..3d309b3c 100644
--- a/test/src/unit-iterators2.cpp
+++ b/test/src/unit-iterators2.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-json_patch.cpp b/test/src/unit-json_patch.cpp
index 1a71621d..c7c62fe5 100644
--- a/test/src/unit-json_patch.cpp
+++ b/test/src/unit-json_patch.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-json_pointer.cpp b/test/src/unit-json_pointer.cpp
index c630da56..9f39493c 100644
--- a/test/src/unit-json_pointer.cpp
+++ b/test/src/unit-json_pointer.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-merge_patch.cpp b/test/src/unit-merge_patch.cpp
index 2daaf00f..15997e19 100644
--- a/test/src/unit-merge_patch.cpp
+++ b/test/src/unit-merge_patch.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-meta.cpp b/test/src/unit-meta.cpp
index 6fc84998..1fd21dbf 100644
--- a/test/src/unit-meta.cpp
+++ b/test/src/unit-meta.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -42,10 +43,10 @@ TEST_CASE("version information")
         CHECK(j["url"] == "https://github.com/nlohmann/json");
         CHECK(j["version"] == json(
         {
-            {"string", "3.1.2"},
+            {"string", "3.2.0"},
             {"major", 3},
-            {"minor", 1},
-            {"patch", 2}
+            {"minor", 2},
+            {"patch", 0}
         }));
 
         CHECK(j.find("platform") != j.end());
diff --git a/test/src/unit-modifiers.cpp b/test/src/unit-modifiers.cpp
index ada65f20..a73e7cfb 100644
--- a/test/src/unit-modifiers.cpp
+++ b/test/src/unit-modifiers.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-msgpack.cpp b/test/src/unit-msgpack.cpp
index d8bdb08b..60892345 100644
--- a/test/src/unit-msgpack.cpp
+++ b/test/src/unit-msgpack.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -33,6 +34,76 @@ using nlohmann::json;
 
 #include <fstream>
 
+class SaxCountdown
+{
+  public:
+    explicit SaxCountdown(const int count) : events_left(count)
+    {}
+
+    bool null()
+    {
+        return events_left-- > 0;
+    }
+
+    bool boolean(bool)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_integer(json::number_integer_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_unsigned(json::number_unsigned_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_float(json::number_float_t, const std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool string(std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_object(std::size_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool key(std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_object()
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_array(std::size_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_array()
+    {
+        return events_left-- > 0;
+    }
+
+    bool parse_error(std::size_t, const std::string&, const json::exception&)
+    {
+        return false;
+    }
+
+  private:
+    int events_left = 0;
+};
+
 TEST_CASE("MessagePack")
 {
     SECTION("individual values")
@@ -54,6 +125,7 @@ TEST_CASE("MessagePack")
 
             // roundtrip
             CHECK(json::from_msgpack(result) == j);
+            CHECK(json::from_msgpack(result, true, false) == j);
         }
 
         SECTION("boolean")
@@ -67,6 +139,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("false")
@@ -78,6 +151,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
         }
 
@@ -111,6 +185,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -141,6 +216,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -174,6 +250,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -208,6 +285,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -250,6 +328,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -300,6 +379,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -331,6 +411,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -347,6 +428,7 @@ TEST_CASE("MessagePack")
 
                     // roundtrip
                     CHECK(json::from_msgpack(result) == j);
+                    CHECK(json::from_msgpack(result, true, false) == j);
                 }
 
                 SECTION("-32768..-129 (int 16)")
@@ -379,6 +461,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -423,6 +506,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -472,6 +556,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
             }
@@ -504,6 +589,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -536,6 +622,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -569,6 +656,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -610,6 +698,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
 
@@ -659,6 +748,7 @@ TEST_CASE("MessagePack")
 
                         // roundtrip
                         CHECK(json::from_msgpack(result) == j);
+                        CHECK(json::from_msgpack(result, true, false) == j);
                     }
                 }
             }
@@ -679,6 +769,7 @@ TEST_CASE("MessagePack")
                     // roundtrip
                     CHECK(json::from_msgpack(result) == j);
                     CHECK(json::from_msgpack(result) == v);
+                    CHECK(json::from_msgpack(result, true, false) == j);
                 }
             }
         }
@@ -727,6 +818,7 @@ TEST_CASE("MessagePack")
 
                     // roundtrip
                     CHECK(json::from_msgpack(result) == j);
+                    CHECK(json::from_msgpack(result, true, false) == j);
                 }
             }
 
@@ -758,6 +850,7 @@ TEST_CASE("MessagePack")
 
                     // roundtrip
                     CHECK(json::from_msgpack(result) == j);
+                    CHECK(json::from_msgpack(result, true, false) == j);
                 }
             }
 
@@ -790,6 +883,7 @@ TEST_CASE("MessagePack")
 
                     // roundtrip
                     CHECK(json::from_msgpack(result) == j);
+                    CHECK(json::from_msgpack(result, true, false) == j);
                 }
             }
 
@@ -824,6 +918,7 @@ TEST_CASE("MessagePack")
 
                     // roundtrip
                     CHECK(json::from_msgpack(result) == j);
+                    CHECK(json::from_msgpack(result, true, false) == j);
                 }
             }
         }
@@ -839,6 +934,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("[null]")
@@ -850,6 +946,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("[1,2,3,4,5]")
@@ -861,6 +958,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("[[[[]]]]")
@@ -872,6 +970,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("array 16")
@@ -886,6 +985,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("array 32")
@@ -909,6 +1009,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
         }
 
@@ -923,6 +1024,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("{\"\":null}")
@@ -934,6 +1036,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("{\"a\": {\"b\": {\"c\": {}}}}")
@@ -948,6 +1051,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("map 16")
@@ -971,6 +1075,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
 
             SECTION("map 32")
@@ -1001,6 +1106,7 @@ TEST_CASE("MessagePack")
 
                 // roundtrip
                 CHECK(json::from_msgpack(result) == j);
+                CHECK(json::from_msgpack(result, true, false) == j);
             }
         }
     }
@@ -1019,10 +1125,12 @@ TEST_CASE("MessagePack")
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>()), json::parse_error&);
             CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>()),
                               "[json.exception.parse_error.110] parse error at 1: unexpected end of input");
+            CHECK(json::from_msgpack(std::vector<uint8_t>(), true, false).is_discarded());
         }
 
         SECTION("too short byte vector")
         {
+            CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0x87})), json::parse_error&);
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xcc})), json::parse_error&);
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xcd})), json::parse_error&);
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xcd, 0x00})), json::parse_error&);
@@ -1038,7 +1146,12 @@ TEST_CASE("MessagePack")
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00})), json::parse_error&);
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})), json::parse_error&);
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xa5, 0x68, 0x65})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0x92, 0x01})), json::parse_error&);
+            CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0x81, 0xa1, 0x61})), json::parse_error&);
 
+            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0x87})),
+                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
             CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcc})),
                               "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
             CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcd})),
@@ -1069,6 +1182,32 @@ TEST_CASE("MessagePack")
                               "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
             CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})),
                               "[json.exception.parse_error.110] parse error at 9: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xa5, 0x68, 0x65})),
+                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0x92, 0x01})),
+                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0x81, 0xa1, 0x61})),
+                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0x87}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcc}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcd}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcd, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xce}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xce, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xce, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xce, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0xa5, 0x68, 0x65}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0x92, 0x01}), true, false).is_discarded());
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0x81, 0xA1, 0x61}), true, false).is_discarded());
         }
 
         SECTION("unsupported bytes")
@@ -1078,9 +1217,12 @@ TEST_CASE("MessagePack")
                 CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xc1})), json::parse_error&);
                 CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xc1})),
                                   "[json.exception.parse_error.112] parse error at 1: error reading MessagePack; last byte: 0xC1");
+                CHECK(json::from_msgpack(std::vector<uint8_t>({0xc6}), true, false).is_discarded());
+
                 CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0xc6})), json::parse_error&);
                 CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xc6})),
                                   "[json.exception.parse_error.112] parse error at 1: error reading MessagePack; last byte: 0xC6");
+                CHECK(json::from_msgpack(std::vector<uint8_t>({0xc6}), true, false).is_discarded());
             }
 
             SECTION("all unsupported bytes")
@@ -1098,6 +1240,7 @@ TEST_CASE("MessagePack")
                         })
                 {
                     CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({static_cast<uint8_t>(byte)})), json::parse_error&);
+                    CHECK(json::from_msgpack(std::vector<uint8_t>({static_cast<uint8_t>(byte)}), true, false).is_discarded());
                 }
             }
         }
@@ -1107,6 +1250,7 @@ TEST_CASE("MessagePack")
             CHECK_THROWS_AS(json::from_msgpack(std::vector<uint8_t>({0x81, 0xff, 0x01})), json::parse_error&);
             CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0x81, 0xff, 0x01})),
                               "[json.exception.parse_error.113] parse error at 2: expected a MessagePack string; last byte: 0xFF");
+            CHECK(json::from_msgpack(std::vector<uint8_t>({0x81, 0xff, 0x01}), true, false).is_discarded());
         }
 
         SECTION("strict mode")
@@ -1123,9 +1267,34 @@ TEST_CASE("MessagePack")
                 CHECK_THROWS_AS(json::from_msgpack(vec), json::parse_error&);
                 CHECK_THROWS_WITH(json::from_msgpack(vec),
                                   "[json.exception.parse_error.110] parse error at 2: expected end of input");
+                CHECK(json::from_msgpack(vec, true, false).is_discarded());
             }
         }
     }
+
+    SECTION("SAX aborts")
+    {
+        SECTION("start_array(len)")
+        {
+            std::vector<uint8_t> v = {0x93, 0x01, 0x02, 0x03};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::msgpack));
+        }
+
+        SECTION("start_object(len)")
+        {
+            std::vector<uint8_t> v = {0x81, 0xa3, 0x66, 0x6F, 0x6F, 0xc2};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::msgpack));
+        }
+
+        SECTION("key()")
+        {
+            std::vector<uint8_t> v = {0x81, 0xa3, 0x66, 0x6F, 0x6F, 0xc2};
+            SaxCountdown scp(1);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::msgpack));
+        }
+    }
 }
 
 
@@ -1180,6 +1349,25 @@ TEST_CASE("MessagePack roundtrips", "[hide]")
 {
     SECTION("input from msgpack-python")
     {
+        // most of these are exluded due to differences in key order (not a real problem)
+        auto exclude_packed = std::set<std::string>
+        {
+            "test/data/json.org/1.json",
+            "test/data/json.org/2.json",
+            "test/data/json.org/3.json",
+            "test/data/json.org/4.json",
+            "test/data/json.org/5.json",
+            "test/data/json_testsuite/sample.json", // kills AppVeyor
+            "test/data/json_tests/pass1.json",
+            "test/data/regression/working_file.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_basic.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_duplicated_key.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_long_strings.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_simple.json",
+            "test/data/nst_json_testsuite/test_parsing/y_object_string_unicode.json",
+        };
+
         for (std::string filename :
                 {
                     "test/data/json_nlohmann_tests/all_unicode.json",
@@ -1331,12 +1519,12 @@ TEST_CASE("MessagePack roundtrips", "[hide]")
         {
             CAPTURE(filename);
 
-            // parse JSON file
-            std::ifstream f_json(filename);
-            json j1 = json::parse(f_json);
-
-            SECTION("std::vector<uint8_t>")
+            SECTION(filename + ": std::vector<uint8_t>")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_msgpack(filename + ".msgpack", std::ios::binary);
                 std::vector<uint8_t> packed(
@@ -1349,8 +1537,12 @@ TEST_CASE("MessagePack roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("std::ifstream")
+            SECTION(filename + ": std::ifstream")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_msgpack(filename + ".msgpack", std::ios::binary);
                 json j2;
@@ -1360,8 +1552,12 @@ TEST_CASE("MessagePack roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("uint8_t* and size")
+            SECTION(filename + ": uint8_t* and size")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_msgpack(filename + ".msgpack", std::ios::binary);
                 std::vector<uint8_t> packed(
@@ -1374,19 +1570,26 @@ TEST_CASE("MessagePack roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("output to output adapters")
+            SECTION(filename + ": output to output adapters")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_msgpack(filename + ".msgpack", std::ios::binary);
                 std::vector<uint8_t> packed(
                     (std::istreambuf_iterator<char>(f_msgpack)),
                     std::istreambuf_iterator<char>());
 
-                SECTION("std::vector<uint8_t>")
+                if (!exclude_packed.count(filename))
                 {
-                    std::vector<uint8_t> vec;
-                    json::to_msgpack(j1, vec);
-                    CHECK(vec == packed);
+                    SECTION(filename + ": output adapters: std::vector<uint8_t>")
+                    {
+                        std::vector<uint8_t> vec;
+                        json::to_msgpack(j1, vec);
+                        CHECK(vec == packed);
+                    }
                 }
             }
         }
diff --git a/test/src/unit-noexcept.cpp b/test/src/unit-noexcept.cpp
index 4b3dcade..72e89267 100644
--- a/test/src/unit-noexcept.cpp
+++ b/test/src/unit-noexcept.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-pointer_access.cpp b/test/src/unit-pointer_access.cpp
index 5670269a..f34b0a7c 100644
--- a/test/src/unit-pointer_access.cpp
+++ b/test/src/unit-pointer_access.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-readme.cpp b/test/src/unit-readme.cpp
index 4c163afa..5e3255ce 100644
--- a/test/src/unit-readme.cpp
+++ b/test/src/unit-readme.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-reference_access.cpp b/test/src/unit-reference_access.cpp
index 3c92096f..5bd20776 100644
--- a/test/src/unit-reference_access.cpp
+++ b/test/src/unit-reference_access.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-regression.cpp b/test/src/unit-regression.cpp
index c4ca93d9..69c0cf29 100644
--- a/test/src/unit-regression.cpp
+++ b/test/src/unit-regression.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -114,6 +115,13 @@ struct nocopy
 };
 }
 
+/////////////////////////////////////////////////////////////////////
+// for #1021
+/////////////////////////////////////////////////////////////////////
+
+using float_json = nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int64_t, std::uint64_t, float>;
+
+
 TEST_CASE("regression tests")
 {
     SECTION("issue #60 - Double quotation mark is not parsed correctly")
@@ -129,19 +137,19 @@ TEST_CASE("regression tests")
 
     SECTION("issue #70 - Handle infinity and NaN cases")
     {
-        /*
+        // previously, NAN/INFINITY created a null value; now, the values are
+        // properly stored, but are dumped as "null"
         SECTION("NAN value")
         {
-            CHECK(json(NAN) == json());
-            CHECK(json(json::number_float_t(NAN)) == json());
+            CHECK(json(NAN).dump() == "null");
+            CHECK(json(json::number_float_t(NAN)).dump() == "null");
         }
 
         SECTION("infinity")
         {
-            CHECK(json(INFINITY) == json());
-            CHECK(json(json::number_float_t(INFINITY)) == json());
+            CHECK(json(INFINITY).dump() == "null");
+            CHECK(json(json::number_float_t(INFINITY)).dump() == "null");
         }
-        */
 
         // With 3.0.0, the semantics of this changed: NAN and infinity are
         // stored properly inside the JSON value (no exception or conversion
@@ -1206,41 +1214,6 @@ TEST_CASE("regression tests")
         CHECK(j["bool_vector"].dump() == "[false,true,false,false]");
     }
 
-    /* NOTE: m_line_buffer is not used any more
-    SECTION("issue #495 - fill_line_buffer incorrectly tests m_stream for eof but not fail or bad bits")
-    {
-        SECTION("setting failbit")
-        {
-            std::stringstream ss;
-            ss << "[1,2,3\n,4,5]";
-
-            json::lexer l(ss);
-
-            CHECK(l.m_line_buffer == "[1,2,3\n");
-
-            l.m_stream->setstate(std::ios_base::failbit);
-
-            CHECK_THROWS_AS(l.fill_line_buffer(), json::parse_error&);
-            CHECK_THROWS_WITH(l.fill_line_buffer(), "[json.exception.parse_error.111] parse error: bad input stream");
-        }
-
-        SECTION("setting badbit")
-        {
-            std::stringstream ss;
-            ss << "[1,2,3\n,4,5]";
-
-            json::lexer l(ss);
-
-            CHECK(l.m_line_buffer == "[1,2,3\n");
-
-            l.m_stream->setstate(std::ios_base::badbit);
-
-            CHECK_THROWS_AS(l.fill_line_buffer(), json::parse_error&);
-            CHECK_THROWS_WITH(l.fill_line_buffer(), "[json.exception.parse_error.111] parse error: bad input stream");
-        }
-    }
-     */
-
     SECTION("issue #504 - assertion error (OSS-Fuzz 856)")
     {
         std::vector<uint8_t> vec1 = {0xf9, 0xff, 0xff, 0x4a, 0x3a, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x01, 0x37, 0x02, 0x38};
@@ -1499,6 +1472,46 @@ TEST_CASE("regression tests")
         //                  "[json.exception.out_of_range.408] excessive object size: 8658170730974374167");
     }
 
+    SECTION("issue #971 - Add a SAX parser - late bug")
+    {
+        // a JSON text
+        auto text = R"(
+    {
+        "Image": {
+            "Width":  800,
+            "Height": 600,
+            "Title":  "View from 15th Floor",
+            "Thumbnail": {
+                "Url":    "http://www.example.com/image/481989943",
+                "Height": 125,
+                "Width":  100
+            },
+            "Animated" : false,
+            "IDs": [116, 943, 234, 38793]
+        }
+    }
+    )";
+
+        // define parser callback
+        json::parser_callback_t cb = [](int /*depth*/, json::parse_event_t event, json & parsed)
+        {
+            // skip object elements with key "Thumbnail"
+            if (event == json::parse_event_t::key and parsed == json("Thumbnail"))
+            {
+                return false;
+            }
+            else
+            {
+                return true;
+            }
+        };
+
+        // parse (with callback) and serialize JSON
+        json j_filtered = json::parse(text, cb);
+
+        CHECK(j_filtered == R"({"Image":{"Animated":false,"Height":600,"IDs":[116,943,234,38793], "Title":"View from 15th Floor","Width":800}})"_json);
+    }
+
     SECTION("issue #972 - Segmentation fault on G++ when trying to assign json string literal to custom json type")
     {
         my_json foo = R"([1, 2, 3])"_json;
@@ -1563,38 +1576,71 @@ TEST_CASE("regression tests")
             switch (event)
             {
                 case json::parse_event_t::key:
-                {
-                    return true;
-                }
+                    {
+                        return true;
+                    }
                 case json::parse_event_t::value:
-                {
-                    return false;
-                }
+                    {
+                        return false;
+                    }
                 case json::parse_event_t::object_start:
-                {
-                    return true;
-                }
+                    {
+                        return true;
+                    }
                 case json::parse_event_t::object_end:
-                {
-                    return false;
-                }
+                    {
+                        return false;
+                    }
                 case json::parse_event_t::array_start:
-                {
-                    return true;
-                }
+                    {
+                        return true;
+                    }
                 case json::parse_event_t::array_end:
-                {
-                    return false;
-                }
+                    {
+                        return false;
+                    }
 
                 default:
-                {
-                    return true;
-                }
+                    {
+                        return true;
+                    }
             }
         };
 
         auto j = json::parse(geojsonExample, cb, true);
         CHECK(j == json());
     }
+
+    SECTION("issue #1021 - to/from_msgpack only works with standard typization")
+    {
+        float_json j = 1000.0;
+        CHECK(float_json::from_cbor(float_json::to_cbor(j)) == j);
+        CHECK(float_json::from_msgpack(float_json::to_msgpack(j)) == j);
+        CHECK(float_json::from_ubjson(float_json::to_ubjson(j)) == j);
+
+        float_json j2 = {1000.0, 2000.0, 3000.0};
+        CHECK(float_json::from_ubjson(float_json::to_ubjson(j2, true, true)) == j2);
+    }
+
+    SECTION("issue #1045 - Using STL algorithms with JSON containers with expected results?")
+    {
+        json diffs = nlohmann::json::array();
+        json m1{{"key1", 42}};
+        json m2{{"key2", 42}};
+        auto p1 = m1.items();
+        auto p2 = m2.items();
+
+        using it_type = decltype(p1.begin());
+
+        std::set_difference(
+            p1.begin(), p1.end(),
+            p2.begin(), p2.end(),
+            std::inserter(diffs, diffs.end()), [&](const it_type & e1, const it_type & e2) -> bool
+        {
+            using comper_pair = std::pair<std::string, decltype(e1.value())>; // Trying to avoid unneeded copy
+            return comper_pair(e1.key(), e1.value()) < comper_pair(e2.key(), e2.value()); // Using pair comper
+        });
+
+        CHECK(diffs.size() == 1); // Note the change here, was 2
+    }
 }
diff --git a/test/src/unit-serialization.cpp b/test/src/unit-serialization.cpp
index ebe64297..f2861c42 100644
--- a/test/src/unit-serialization.cpp
+++ b/test/src/unit-serialization.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-testsuites.cpp b/test/src/unit-testsuites.cpp
index 5f77a737..237eb34e 100644
--- a/test/src/unit-testsuites.cpp
+++ b/test/src/unit-testsuites.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -881,6 +882,438 @@ TEST_CASE("nst's JSONTestSuite")
     }
 }
 
+TEST_CASE("nst's JSONTestSuite (2)")
+{
+    SECTION("test_parsing")
+    {
+        SECTION("y")
+        {
+            for (auto filename :
+                    {
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_arraysWithSpaces.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_empty-string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_empty.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_ending_with_newline.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_false.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_heterogeneous.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_with_1_and_newline.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_with_leading_space.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_with_several_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_array_with_trailing_space.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_0e+1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_0e1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_after_space.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_double_close_to_zero.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_int_with_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_minus_zero.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_negative_int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_negative_one.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_negative_zero.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_neg_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_capital_e_pos_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_exponent.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_fraction_exponent.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_neg_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_real_pos_exponent.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_simple_int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_number_simple_real.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_basic.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_duplicated_key_and_value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_empty.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_empty_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_escaped_null_in_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_extreme_numbers.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_long_strings.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_simple.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_string_unicode.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_object_with_newlines.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_1_2_3_bytes_UTF-8_sequences.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pair.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_accepted_surrogate_pairs.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_allowed_escapes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_backslash_and_u_escaped_zero.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_backslash_doublequotes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_comments.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_a.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_double_escape_n.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_escaped_control_character.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_escaped_noncharacter.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_in_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_in_array_with_leading_space.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_last_surrogates_1_and_2.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_nbsp_uescaped.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+10FFFF.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_nonCharacterInUTF-8_U+FFFF.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_null_escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_one-byte-utf-8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_pi.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_reservedCharacterInUTF-8_U+1BFFF.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_simple_ascii.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_space.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_surrogates_U+1D11E_MUSICAL_SYMBOL_G_CLEF.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_three-byte-utf-8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_two-byte-utf-8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_u+2028_line_sep.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_u+2029_par_sep.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_uEscape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_uescaped_newline.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unescaped_char_delete.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicodeEscapedBackslash.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_2.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+10FFFE_nonchar.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+1FFFE_nonchar.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+200B_ZERO_WIDTH_SPACE.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+2064_invisible_plus.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FDD0_nonchar.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_U+FFFE_nonchar.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_unicode_escaped_double_quote.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_utf8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_string_with_del_character.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_false.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_negative_real.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_lonely_true.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_string_empty.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_trailing_newline.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_true_in_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/y_structure_whitespace_array.json"
+                    }
+                )
+            {
+                CAPTURE(filename);
+                std::ifstream f(filename);
+                CHECK_NOTHROW(json::parse(f));
+                std::ifstream f2(filename);
+                CHECK(json::accept(f2));
+            }
+        }
+
+        SECTION("n")
+        {
+            for (auto filename :
+                    {
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_1_true_without_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_a_invalid_utf8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_colon_instead_of_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_comma_after_close.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_comma_and_number.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_double_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_double_extra_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_extra_close.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_extra_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_incomplete.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_incomplete_invalid_value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_inner_array_no_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_invalid_utf8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_items_separated_by_semicolon.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_just_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_just_minus.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_missing_value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_newlines_unclosed.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_number_and_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_number_and_several_commas.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_spaces_vertical_tab_formfeed.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_star_inside.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_unclosed.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_trailing_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_new_lines.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_array_unclosed_with_object_inside.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_incomplete_false.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_incomplete_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_incomplete_true.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/n_multidigit_number_then_00.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_++.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_+1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_+Inf.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_-01.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_-1.0..json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_-2..json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_-NaN.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_.-1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_.2e-3.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0.1.2.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0.3e+.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0.3e.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0.e1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E+.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0_capital_E.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0e+.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_0e.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_1.0e+.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_1.0e-.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_1.0e.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_1_000.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_1eE2.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_2.e+3.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_2.e-3.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_2.e3.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_9.e+.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_Inf.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_NaN.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_U+FF11_fullwidth_digit_one.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_expression.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_hex_1_digit.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_hex_2_digits.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_infinity.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_invalid+-.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_invalid-negative-real.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-bigger-int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-exponent.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_invalid-utf-8-in-int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_minus_infinity.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_minus_sign_with_trailing_garbage.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_minus_space_1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_neg_int_starting_with_zero.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_neg_real_without_int_part.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_neg_with_garbage_at_end.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_real_garbage_after_e.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_real_with_invalid_utf8_after_e.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_real_without_fractional_part.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_starting_with_dot.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_with_alpha_char.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_number_with_leading_zero.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_bad_value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_bracket_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_comma_instead_of_colon.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_double_colon.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_emoji.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_garbage_at_end.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_key_with_single_quotes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_lone_continuation_byte_in_key_and_trailing_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_missing_colon.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_missing_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_missing_semicolon.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_missing_value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_no-colon.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_non_string_key_but_huge_number_instead.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_repeated_null_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_several_trailing_commas.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_single_quote.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_open.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_trailing_comment_slash_open_incomplete.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_two_commas_in_a_row.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_unquoted_key.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_unterminated-value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_with_single_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_object_with_trailing_garbage.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_single_space.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_1_surrogate_then_escape_u1x.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_accentuated_char_no_quotes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_backslash_00.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_escape_x.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_escaped_backslash_bad.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_escaped_ctrl_char_tab.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_escaped_emoji.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_escaped_character.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_incomplete_surrogate_escape_invalid.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_invalid-utf-8-in-escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_invalid_backslash_esc.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_invalid_unicode_escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_invalid_utf8_after_escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_leading_uescaped_thinspace.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_no_quotes_with_bad_escape.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_single_doublequote.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_single_quote.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_single_string_no_double_quotes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_start_escape_unclosed.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_crtl_char.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_newline.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_unescaped_tab.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_unicode_CapitalU.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_string_with_trailing_garbage.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_U+2060_word_joined.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_UTF8_BOM_no_data.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_..json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_angle_bracket_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_array_trailing_garbage.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_array_with_extra_array_close.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_array_with_unclosed_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_ascii-unicode-identifier.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_capitalized_True.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_close_unopened_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_comma_instead_of_closing_brace.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_double_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_end_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_incomplete_UTF8_BOM.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_lone-invalid-utf-8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_lone-open-bracket.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_no_data.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_null-byte-outside-string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_number_with_trailing_garbage.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_object_followed_by_closing_object.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_object_unclosed_no_value.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_object_with_comment.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_object_with_trailing_garbage.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_apostrophe.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_open_object.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_open_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_object.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_close_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_comma.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_open_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_object_string_with_apostrophes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_open.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_single_eacute.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_single_star.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_trailing_#.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_uescaped_LF_before_string.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_partial_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_false.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_array_unfinished_true.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_unclosed_object.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_unicode-identifier.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_U+2060_word_joiner.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_whitespace_formfeed.json"
+                    }
+                )
+            {
+                CAPTURE(filename);
+                std::ifstream f(filename);
+                CHECK_THROWS_AS(json::parse(f), json::parse_error&);
+                std::ifstream f2(filename);
+                CHECK(not json::accept(f2));
+            }
+        }
+
+        SECTION("n (previously overflowed)")
+        {
+            for (auto filename :
+                    {
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_100000_opening_arrays.json",
+                        "test/data/nst_json_testsuite2/test_parsing/n_structure_open_array_object.json"
+                    }
+                )
+            {
+                CAPTURE(filename);
+                std::ifstream f(filename);
+                CHECK(not json::accept(f));
+            }
+        }
+
+        SECTION("i -> y")
+        {
+            for (auto filename :
+                    {
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_double_huge_neg_exp.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_huge_exp.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_neg_int_huge_exp.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_pos_double_huge_exp.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_real_neg_overflow.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_real_pos_overflow.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_real_underflow.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_too_big_neg_int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_too_big_pos_int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_very_big_negative_int.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_object_key_lone_2nd_surrogate.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_1st_surrogate_but_2nd_missing.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_1st_valid_surrogate_2nd_invalid.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_UTF-16LE_with_BOM.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_UTF-8_invalid_sequence.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_UTF8_surrogate_U+D800.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_and_escape_valid.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_pair.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogates_escape_valid.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_invalid_lonely_surrogate.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_invalid_surrogate.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_invalid_utf-8.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_inverted_surrogates_U+1D11E.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_iso_latin_1.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_lone_second_surrogate.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_lone_utf8_continuation_byte.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_not_in_unicode_range.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_2_bytes.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes_null.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_truncated-utf-8.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_utf16BE_no_BOM.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_string_utf16LE_no_BOM.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_structure_500_nested_arrays.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_structure_UTF-8_BOM_empty_object.json"
+                    }
+                )
+            {
+                CAPTURE(filename);
+                std::ifstream f(filename);
+                CHECK_NOTHROW(json::parse(f));
+                std::ifstream f2(filename);
+                CHECK(json::accept(f2));
+            }
+        }
+
+        SECTION("i -> n")
+        {
+            for (auto filename :
+                    {
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_double_huge_neg_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_huge_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_neg_int_huge_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_pos_double_huge_exp.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_real_neg_overflow.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_number_real_pos_overflow.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_real_underflow.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_too_big_neg_int.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_too_big_pos_int.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_number_very_big_negative_int.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_object_key_lone_2nd_surrogate.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_1st_surrogate_but_2nd_missing.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_1st_valid_surrogate_2nd_invalid.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_UTF-16LE_with_BOM.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_UTF-8_invalid_sequence.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_UTF8_surrogate_U+D800.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_and_escape_valid.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogate_pair.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_incomplete_surrogates_escape_valid.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_invalid_lonely_surrogate.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_invalid_surrogate.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_invalid_utf-8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_inverted_surrogates_U+1D11E.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_iso_latin_1.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_lone_second_surrogate.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_lone_utf8_continuation_byte.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_not_in_unicode_range.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_2_bytes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_overlong_sequence_6_bytes_null.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_truncated-utf-8.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_utf16BE_no_BOM.json",
+                        "test/data/nst_json_testsuite2/test_parsing/i_string_utf16LE_no_BOM.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_structure_500_nested_arrays.json",
+                        //"test/data/nst_json_testsuite2/test_parsing/i_structure_UTF-8_BOM_empty_object.json"
+                    }
+                )
+            {
+                CAPTURE(filename);
+                std::ifstream f(filename);
+                CHECK_THROWS_AS(json::parse(f), json::exception&); // could be parse_error or out_of_range
+                std::ifstream f2(filename);
+                CHECK(not json::accept(f2));
+            }
+        }
+    }
+}
+
 std::string trim(const std::string& str);
 
 // from http://stackoverflow.com/a/25829178/266378
diff --git a/test/src/unit-to_chars.cpp b/test/src/unit-to_chars.cpp
index 841e164b..d4431765 100644
--- a/test/src/unit-to_chars.cpp
+++ b/test/src/unit-to_chars.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-ubjson.cpp b/test/src/unit-ubjson.cpp
index e2f77234..abae230b 100644
--- a/test/src/unit-ubjson.cpp
+++ b/test/src/unit-ubjson.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
@@ -33,6 +34,76 @@ using nlohmann::json;
 
 #include <fstream>
 
+class SaxCountdown
+{
+  public:
+    explicit SaxCountdown(const int count) : events_left(count)
+    {}
+
+    bool null()
+    {
+        return events_left-- > 0;
+    }
+
+    bool boolean(bool)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_integer(json::number_integer_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_unsigned(json::number_unsigned_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool number_float(json::number_float_t, const std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool string(std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_object(std::size_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool key(std::string&)
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_object()
+    {
+        return events_left-- > 0;
+    }
+
+    bool start_array(std::size_t)
+    {
+        return events_left-- > 0;
+    }
+
+    bool end_array()
+    {
+        return events_left-- > 0;
+    }
+
+    bool parse_error(std::size_t, const std::string&, const json::exception&)
+    {
+        return false;
+    }
+
+  private:
+    int events_left = 0;
+};
+
 TEST_CASE("UBJSON")
 {
     SECTION("individual values")
@@ -54,6 +125,7 @@ TEST_CASE("UBJSON")
 
             // roundtrip
             CHECK(json::from_ubjson(result) == j);
+            CHECK(json::from_ubjson(result, true, false) == j);
         }
 
         SECTION("boolean")
@@ -67,6 +139,7 @@ TEST_CASE("UBJSON")
 
                 // roundtrip
                 CHECK(json::from_ubjson(result) == j);
+                CHECK(json::from_ubjson(result, true, false) == j);
             }
 
             SECTION("false")
@@ -78,6 +151,7 @@ TEST_CASE("UBJSON")
 
                 // roundtrip
                 CHECK(json::from_ubjson(result) == j);
+                CHECK(json::from_ubjson(result, true, false) == j);
             }
         }
 
@@ -140,6 +214,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -152,7 +227,7 @@ TEST_CASE("UBJSON")
                     numbers.push_back(-10000000);
                     numbers.push_back(-100000000);
                     numbers.push_back(-1000000000);
-                    numbers.push_back(-2147483648L);
+                    numbers.push_back(-2147483647 - 1); // https://stackoverflow.com/a/29356002/266378
                     for (auto i : numbers)
                     {
                         CAPTURE(i);
@@ -186,6 +261,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -219,6 +295,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -239,6 +316,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("-128..-1 (int8)")
@@ -269,6 +347,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -301,6 +380,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -333,6 +413,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -367,6 +448,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -409,6 +491,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -457,6 +540,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
             }
@@ -492,6 +576,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -524,6 +609,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -557,6 +643,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -598,6 +685,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
 
@@ -645,6 +733,7 @@ TEST_CASE("UBJSON")
 
                         // roundtrip
                         CHECK(json::from_ubjson(result) == j);
+                        CHECK(json::from_ubjson(result, true, false) == j);
                     }
                 }
             }
@@ -665,6 +754,7 @@ TEST_CASE("UBJSON")
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
                     CHECK(json::from_ubjson(result) == v);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
         }
@@ -703,6 +793,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -735,6 +826,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -768,6 +860,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -803,6 +896,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
         }
@@ -820,6 +914,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -831,6 +926,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -842,6 +938,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -856,6 +953,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -867,6 +965,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -878,6 +977,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -892,6 +992,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -903,6 +1004,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -914,6 +1016,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -928,6 +1031,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -939,6 +1043,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -950,6 +1055,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -966,6 +1072,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -982,6 +1089,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -993,6 +1101,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -1009,6 +1118,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -1027,6 +1137,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -1038,6 +1149,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
         }
@@ -1055,6 +1167,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -1066,6 +1179,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -1077,6 +1191,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -1091,6 +1206,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -1102,6 +1218,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -1113,6 +1230,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
 
@@ -1130,6 +1248,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=false")
@@ -1144,6 +1263,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
 
                 SECTION("size=true type=true")
@@ -1158,6 +1278,7 @@ TEST_CASE("UBJSON")
 
                     // roundtrip
                     CHECK(json::from_ubjson(result) == j);
+                    CHECK(json::from_ubjson(result, true, false) == j);
                 }
             }
         }
@@ -1189,6 +1310,80 @@ TEST_CASE("UBJSON")
             CHECK_THROWS_AS(json::to_ubjson(j), json::out_of_range&);
             CHECK_THROWS_WITH(json::to_ubjson(j), "[json.exception.out_of_range.407] number overflow serializing 9223372036854775808");
         }
+
+        SECTION("excessive size")
+        {
+            SECTION("array")
+            {
+                std::vector<uint8_t> v_ubjson = {'[', '$', 'Z', '#', 'L', 0x78, 0x28, 0x00, 0x68, 0x28, 0x69, 0x69, 0x17};
+                CHECK_THROWS_AS(json::from_ubjson(v_ubjson), json::out_of_range&);
+
+                json j;
+                nlohmann::detail::json_sax_dom_callback_parser<json> scp(j, [](int, json::parse_event_t, const json&)
+                {
+                    return true;
+                });
+                CHECK_THROWS_AS(json::sax_parse(v_ubjson, &scp, json::input_format_t::ubjson), json::out_of_range&);
+            }
+
+            SECTION("object")
+            {
+                std::vector<uint8_t> v_ubjson = {'{', '$', 'Z', '#', 'L', 0x78, 0x28, 0x00, 0x68, 0x28, 0x69, 0x69, 0x17};
+                CHECK_THROWS_AS(json::from_ubjson(v_ubjson), json::out_of_range&);
+
+                json j;
+                nlohmann::detail::json_sax_dom_callback_parser<json> scp(j, [](int, json::parse_event_t, const json&)
+                {
+                    return true;
+                });
+                CHECK_THROWS_AS(json::sax_parse(v_ubjson, &scp, json::input_format_t::ubjson), json::out_of_range&);
+            }
+        }
+    }
+
+    SECTION("SAX aborts")
+    {
+        SECTION("start_array()")
+        {
+            std::vector<uint8_t> v = {'[', 'T', 'F', ']'};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::ubjson));
+        }
+
+        SECTION("start_object()")
+        {
+            std::vector<uint8_t> v = {'{', 'i', 3, 'f', 'o', 'o', 'F', '}'};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::ubjson));
+        }
+
+        SECTION("key() in object")
+        {
+            std::vector<uint8_t> v = {'{', 'i', 3, 'f', 'o', 'o', 'F', '}'};
+            SaxCountdown scp(1);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::ubjson));
+        }
+
+        SECTION("start_array(len)")
+        {
+            std::vector<uint8_t> v = {'[', '#', 'i', '2', 'T', 'F'};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::ubjson));
+        }
+
+        SECTION("start_object(len)")
+        {
+            std::vector<uint8_t> v = {'{', '#', 'i', '1', 3, 'f', 'o', 'o', 'F'};
+            SaxCountdown scp(0);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::ubjson));
+        }
+
+        SECTION("key() in object with length")
+        {
+            std::vector<uint8_t> v = {'{', 'i', 3, 'f', 'o', 'o', 'F', '}'};
+            SaxCountdown scp(1);
+            CHECK(not json::sax_parse(v, &scp, json::input_format_t::ubjson));
+        }
     }
 
     SECTION("parsing values")
@@ -1239,6 +1434,7 @@ TEST_CASE("UBJSON")
             SECTION("optimized version (length only)")
             {
                 // create vector with two elements of the same type
+                std::vector<uint8_t> v_TU = {'[', '#', 'U', 2, 'T', 'T'};
                 std::vector<uint8_t> v_T = {'[', '#', 'i', 2, 'T', 'T'};
                 std::vector<uint8_t> v_F = {'[', '#', 'i', 2, 'F', 'F'};
                 std::vector<uint8_t> v_Z = {'[', '#', 'i', 2, 'Z', 'Z'};
@@ -1252,6 +1448,7 @@ TEST_CASE("UBJSON")
                 std::vector<uint8_t> v_C = {'[', '#', 'i', 2, 'C', 'a', 'C', 'a'};
 
                 // check if vector is parsed correctly
+                CHECK(json::from_ubjson(v_TU) == json({true, true}));
                 CHECK(json::from_ubjson(v_T) == json({true, true}));
                 CHECK(json::from_ubjson(v_F) == json({false, false}));
                 CHECK(json::from_ubjson(v_Z) == json({nullptr, nullptr}));
@@ -1378,6 +1575,136 @@ TEST_CASE("UBJSON")
                 CHECK_THROWS_WITH(json::from_ubjson(v), "[json.exception.parse_error.112] parse error at 4: expected '#' after UBJSON type information; last byte: 0x02");
             }
         }
+
+        SECTION("strings")
+        {
+            std::vector<uint8_t> vS = {'S'};
+            CHECK_THROWS_AS(json::from_ubjson(vS), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vS), "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+            CHECK(json::from_ubjson(vS, true, false).is_discarded());
+
+            std::vector<uint8_t> v = {'S', 'i', '2', 'a'};
+            CHECK_THROWS_AS(json::from_ubjson(v), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v), "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+            CHECK(json::from_ubjson(v, true, false).is_discarded());
+
+            std::vector<uint8_t> vC = {'C'};
+            CHECK_THROWS_AS(json::from_ubjson(vC), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vC), "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+            CHECK(json::from_ubjson(vC, true, false).is_discarded());
+        }
+
+        SECTION("sizes")
+        {
+            std::vector<uint8_t> vU = {'[', '#', 'U'};
+            CHECK_THROWS_AS(json::from_ubjson(vU), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vU), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vU, true, false).is_discarded());
+
+            std::vector<uint8_t> vi = {'[', '#', 'i'};
+            CHECK_THROWS_AS(json::from_ubjson(vi), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vi), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vi, true, false).is_discarded());
+
+            std::vector<uint8_t> vI = {'[', '#', 'I'};
+            CHECK_THROWS_AS(json::from_ubjson(vI), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vI), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vI, true, false).is_discarded());
+
+            std::vector<uint8_t> vl = {'[', '#', 'l'};
+            CHECK_THROWS_AS(json::from_ubjson(vl), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vl), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vl, true, false).is_discarded());
+
+            std::vector<uint8_t> vL = {'[', '#', 'L'};
+            CHECK_THROWS_AS(json::from_ubjson(vL), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vL), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vL, true, false).is_discarded());
+
+            std::vector<uint8_t> v0 = {'[', '#', 'T', ']'};
+            CHECK_THROWS_AS(json::from_ubjson(v0), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v0), "[json.exception.parse_error.113] parse error at 3: byte after '#' must denote a number type; last byte: 0x54");
+            CHECK(json::from_ubjson(v0, true, false).is_discarded());
+        }
+
+        SECTION("types")
+        {
+            std::vector<uint8_t> v0 = {'[', '$'};
+            CHECK_THROWS_AS(json::from_ubjson(v0), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v0), "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+            CHECK(json::from_ubjson(v0, true, false).is_discarded());
+
+            std::vector<uint8_t> vi = {'[', '$', '#'};
+            CHECK_THROWS_AS(json::from_ubjson(vi), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vi), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vi, true, false).is_discarded());
+
+            std::vector<uint8_t> vT = {'[', '$', 'T'};
+            CHECK_THROWS_AS(json::from_ubjson(vT), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vT), "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+            CHECK(json::from_ubjson(vT, true, false).is_discarded());
+        }
+
+        SECTION("arrays")
+        {
+            std::vector<uint8_t> vST = {'[', '$', 'i', '#', 'i', 2, 1};
+            CHECK_THROWS_AS(json::from_ubjson(vST), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vST), "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
+            CHECK(json::from_ubjson(vST, true, false).is_discarded());
+
+            std::vector<uint8_t> vS = {'[', '#', 'i', 2, 'i', 1};
+            CHECK_THROWS_AS(json::from_ubjson(vS), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vS), "[json.exception.parse_error.110] parse error at 7: unexpected end of input");
+            CHECK(json::from_ubjson(vS, true, false).is_discarded());
+
+            std::vector<uint8_t> v = {'[', 'i', 2, 'i', 1};
+            CHECK_THROWS_AS(json::from_ubjson(v), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v), "[json.exception.parse_error.110] parse error at 6: unexpected end of input");
+            CHECK(json::from_ubjson(v, true, false).is_discarded());
+        }
+
+        SECTION("objects")
+        {
+            std::vector<uint8_t> vST = {'{', '$', 'i', '#', 'i', 2, 'i', 1, 'a', 1};
+            CHECK_THROWS_AS(json::from_ubjson(vST), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vST), "[json.exception.parse_error.110] parse error at 11: unexpected end of input");
+            CHECK(json::from_ubjson(vST, true, false).is_discarded());
+
+            std::vector<uint8_t> vT = {'{', '$', 'i', 'i', 1, 'a', 1};
+            CHECK_THROWS_AS(json::from_ubjson(vT), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vT), "[json.exception.parse_error.112] parse error at 4: expected '#' after UBJSON type information; last byte: 0x69");
+            CHECK(json::from_ubjson(vT, true, false).is_discarded());
+
+            std::vector<uint8_t> vS = {'{', '#', 'i', 2, 'i', 1, 'a', 'i', 1};
+            CHECK_THROWS_AS(json::from_ubjson(vS), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vS), "[json.exception.parse_error.110] parse error at 10: unexpected end of input");
+            CHECK(json::from_ubjson(vS, true, false).is_discarded());
+
+            std::vector<uint8_t> v = {'{', 'i', 1, 'a', 'i', 1};
+            CHECK_THROWS_AS(json::from_ubjson(v), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v), "[json.exception.parse_error.110] parse error at 7: unexpected end of input");
+            CHECK(json::from_ubjson(v, true, false).is_discarded());
+
+            std::vector<uint8_t> v2 = {'{', 'i', 1, 'a', 'i', 1, 'i'};
+            CHECK_THROWS_AS(json::from_ubjson(v2), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v2), "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
+            CHECK(json::from_ubjson(v2, true, false).is_discarded());
+
+            std::vector<uint8_t> v3 = {'{', 'i', 1, 'a'};
+            CHECK_THROWS_AS(json::from_ubjson(v3), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(v3), "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+            CHECK(json::from_ubjson(v3, true, false).is_discarded());
+
+            std::vector<uint8_t> vST1 = {'{', '$', 'd', '#', 'i', 2, 'i', 1, 'a'};
+            CHECK_THROWS_AS(json::from_ubjson(vST1), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vST1), "[json.exception.parse_error.110] parse error at 10: unexpected end of input");
+            CHECK(json::from_ubjson(vST1, true, false).is_discarded());
+
+            std::vector<uint8_t> vST2 = {'{', '#', 'i', 2, 'i', 1, 'a'};
+            CHECK_THROWS_AS(json::from_ubjson(vST2), json::parse_error&);
+            CHECK_THROWS_WITH(json::from_ubjson(vST2), "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
+            CHECK(json::from_ubjson(vST2, true, false).is_discarded());
+        }
     }
 
     SECTION("writing optimized values")
@@ -1477,257 +1804,6 @@ TEST_CASE("UBJSON")
     }
 }
 
-/*
-// use this testcase outside [hide] to run it with Valgrind
-TEST_CASE("single UBJSON roundtrip")
-{
-    SECTION("sample.json")
-    {
-        std::string filename = "test/data/json_testsuite/sample.json";
-
-        // parse JSON file
-        std::ifstream f_json(filename);
-        json j1 = json::parse(f_json);
-
-        // parse MessagePack file
-        std::ifstream f_ubjson(filename + ".ubj", std::ios::binary);
-        std::vector<uint8_t> packed((std::istreambuf_iterator<char>(f_ubjson)),
-                                    std::istreambuf_iterator<char>());
-        json j2;
-        CHECK_NOTHROW(j2 = json::from_ubjson(packed));
-
-        // compare parsed JSON values
-        CHECK(j1 == j2);
-
-        SECTION("roundtrips")
-        {
-            SECTION("std::ostringstream")
-            {
-                std::ostringstream ss;
-                json::to_ubjson(j1, ss);
-                json j3 = json::from_ubjson(ss.str());
-                CHECK(j1 == j3);
-            }
-
-            SECTION("std::string")
-            {
-                std::string s;
-                json::to_ubjson(j1, s);
-                json j3 = json::from_ubjson(s);
-                CHECK(j1 == j3);
-            }
-        }
-
-        // check with different start index
-        // packed.insert(packed.begin(), 5, 0xff);
-        // CHECK(j1 == json::from_ubjson(packed.begin() + 5, packed.end()));
-    }
-}
-*/
-
-/*
-TEST_CASE("UBJSON roundtrips", "[hide]")
-{
-    SECTION("input from py-ubjson")
-    {
-        for (std::string filename :
-                {
-                    "test/data/json_nlohmann_tests/all_unicode.json",
-                    "test/data/json.org/1.json",
-                    "test/data/json.org/2.json",
-                    "test/data/json.org/3.json",
-                    "test/data/json.org/4.json",
-                    "test/data/json.org/5.json",
-                    "test/data/json_roundtrip/roundtrip01.json",
-                    "test/data/json_roundtrip/roundtrip02.json",
-                    "test/data/json_roundtrip/roundtrip03.json",
-                    "test/data/json_roundtrip/roundtrip04.json",
-                    "test/data/json_roundtrip/roundtrip05.json",
-                    "test/data/json_roundtrip/roundtrip06.json",
-                    "test/data/json_roundtrip/roundtrip07.json",
-                    "test/data/json_roundtrip/roundtrip08.json",
-                    "test/data/json_roundtrip/roundtrip09.json",
-                    "test/data/json_roundtrip/roundtrip10.json",
-                    "test/data/json_roundtrip/roundtrip11.json",
-                    "test/data/json_roundtrip/roundtrip12.json",
-                    "test/data/json_roundtrip/roundtrip13.json",
-                    "test/data/json_roundtrip/roundtrip14.json",
-                    "test/data/json_roundtrip/roundtrip15.json",
-                    "test/data/json_roundtrip/roundtrip16.json",
-                    "test/data/json_roundtrip/roundtrip17.json",
-                    "test/data/json_roundtrip/roundtrip18.json",
-                    "test/data/json_roundtrip/roundtrip19.json",
-                    "test/data/json_roundtrip/roundtrip20.json",
-                    "test/data/json_roundtrip/roundtrip21.json",
-                    "test/data/json_roundtrip/roundtrip22.json",
-                    "test/data/json_roundtrip/roundtrip23.json",
-                    "test/data/json_roundtrip/roundtrip24.json",
-                    "test/data/json_roundtrip/roundtrip25.json",
-                    "test/data/json_roundtrip/roundtrip26.json",
-                    "test/data/json_roundtrip/roundtrip27.json",
-                    "test/data/json_roundtrip/roundtrip28.json",
-                    "test/data/json_roundtrip/roundtrip29.json",
-                    "test/data/json_roundtrip/roundtrip30.json",
-                    "test/data/json_roundtrip/roundtrip31.json",
-                    "test/data/json_roundtrip/roundtrip32.json",
-                    "test/data/json_testsuite/sample.json", // kills AppVeyor
-                    "test/data/json_tests/pass1.json",
-                    "test/data/json_tests/pass2.json",
-                    "test/data/json_tests/pass3.json",
-                    "test/data/regression/floats.json",
-                    "test/data/regression/signed_ints.json",
-                    "test/data/regression/unsigned_ints.json",
-                    "test/data/regression/working_file.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_arraysWithSpaces.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_empty-string.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_empty.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_ending_with_newline.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_false.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_heterogeneous.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_null.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_with_1_and_newline.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_with_leading_space.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_with_several_null.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_array_with_trailing_space.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_0e+1.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_0e1.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_after_space.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_double_close_to_zero.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_double_huge_neg_exp.json",
-                    //"test/data/nst_json_testsuite/test_parsing/y_number_huge_exp.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_int_with_exp.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_minus_zero.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_negative_int.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_negative_one.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_negative_zero.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_capital_e.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_capital_e_neg_exp.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_capital_e_pos_exp.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_exponent.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_fraction_exponent.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_neg_exp.json",
-                    //"test/data/nst_json_testsuite/test_parsing/y_number_real_neg_overflow.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_pos_exponent.json",
-                    //"test/data/nst_json_testsuite/test_parsing/y_number_real_pos_overflow.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_real_underflow.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_simple_int.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_number_simple_real.json",
-                    //"test/data/nst_json_testsuite/test_parsing/y_number_too_big_neg_int.json",
-                    //"test/data/nst_json_testsuite/test_parsing/y_number_too_big_pos_int.json",
-                    //"test/data/nst_json_testsuite/test_parsing/y_number_very_big_negative_int.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_basic.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_duplicated_key.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_duplicated_key_and_value.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_empty.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_empty_key.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_escaped_null_in_key.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_extreme_numbers.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_long_strings.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_simple.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_string_unicode.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_object_with_newlines.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_1_2_3_bytes_UTF-8_sequences.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_UTF-16_Surrogates_U+1D11E_MUSICAL_SYMBOL_G_CLEF.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_accepted_surrogate_pair.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_accepted_surrogate_pairs.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_allowed_escapes.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_backslash_and_u_escaped_zero.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_backslash_doublequotes.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_comments.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_double_escape_a.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_double_escape_n.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_escaped_control_character.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_escaped_noncharacter.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_in_array.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_in_array_with_leading_space.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_last_surrogates_1_and_2.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_newline_uescaped.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_nonCharacterInUTF-8_U+10FFFF.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_nonCharacterInUTF-8_U+1FFFF.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_nonCharacterInUTF-8_U+FFFF.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_null_escape.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_one-byte-utf-8.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_pi.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_simple_ascii.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_space.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_three-byte-utf-8.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_two-byte-utf-8.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_u+2028_line_sep.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_u+2029_par_sep.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_uEscape.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unescaped_char_delete.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unicode.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unicodeEscapedBackslash.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unicode_2.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unicode_U+200B_ZERO_WIDTH_SPACE.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unicode_U+2064_invisible_plus.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_unicode_escaped_double_quote.json",
-                    // "test/data/nst_json_testsuite/test_parsing/y_string_utf16.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_utf8.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_string_with_del_character.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_lonely_false.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_lonely_int.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_lonely_negative_real.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_lonely_null.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_lonely_string.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_lonely_true.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_string_empty.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_trailing_newline.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_true_in_array.json",
-                    "test/data/nst_json_testsuite/test_parsing/y_structure_whitespace_array.json"
-                })
-        {
-            CAPTURE(filename);
-
-            // parse JSON file
-            std::ifstream f_json(filename);
-            json j1 = json::parse(f_json);
-
-            SECTION("std::vector<uint8_t>")
-            {
-                // parse UBJSON file
-                std::ifstream f_ubjson(filename + ".ubj", std::ios::binary);
-                std::vector<uint8_t> packed(
-                    (std::istreambuf_iterator<char>(f_ubjson)),
-                    std::istreambuf_iterator<char>());
-                json j2;
-                CHECK_NOTHROW(j2 = json::from_ubjson(packed));
-
-                // compare parsed JSON values
-                CHECK(j1 == j2);
-            }
-
-            SECTION("std::ifstream")
-            {
-                // parse UBJSON file
-                std::ifstream f_ubjson(filename + ".ubj", std::ios::binary);
-                json j2;
-                CHECK_NOTHROW(j2 = json::from_ubjson(f_ubjson));
-
-                // compare parsed JSON values
-                CHECK(j1 == j2);
-            }
-
-            SECTION("uint8_t* and size")
-            {
-                // parse UBJSON file
-                std::ifstream f_ubjson(filename + ".ubj", std::ios::binary);
-                std::vector<uint8_t> packed(
-                    (std::istreambuf_iterator<char>(f_ubjson)),
-                    std::istreambuf_iterator<char>());
-                json j2;
-                CHECK_NOTHROW(j2 = json::from_ubjson({packed.data(), packed.size()}));
-
-                // compare parsed JSON values
-                CHECK(j1 == j2);
-            }
-        }
-    }
-}
-*/
-
 TEST_CASE("Universal Binary JSON Specification Examples 1")
 {
     SECTION("Null Value")
@@ -2037,40 +2113,6 @@ TEST_CASE("Universal Binary JSON Specification Examples 1")
     }
 }
 
-/*
-TEST_CASE("Universal Binary JSON Specification Examples 2")
-{
-    for (std::string prefix :
-            {
-                "test/data/universal-binary-json-java/CouchDB4k",
-                "test/data/universal-binary-json-java/MediaContent",
-                "test/data/universal-binary-json-java/TwitterTimeline"
-            })
-    {
-        CAPTURE(prefix);
-
-        // parse JSON file
-        std::ifstream f_json(prefix + ".formatted.json");
-        json j1 = json::parse(f_json);
-
-        SECTION("std::vector<uint8_t>")
-        {
-            // parse UBJSON file
-            std::ifstream f_ubjson(prefix + ".ubj", std::ios::binary);
-            std::vector<uint8_t> packed(
-                (std::istreambuf_iterator<char>(f_ubjson)),
-                std::istreambuf_iterator<char>());
-            json j2;
-            CHECK_NOTHROW(j2 = json::from_ubjson(packed));
-
-            // compare parsed JSON values
-            CHECK(j1 == j2);
-        }
-    }
-}
-*/
-
-
 TEST_CASE("all UBJSON first bytes", "[!throws]")
 {
     // these bytes will fail immediately with exception parse_error.112
@@ -2157,12 +2199,12 @@ TEST_CASE("UBJSON roundtrips", "[hide]")
         {
             CAPTURE(filename);
 
-            // parse JSON file
-            std::ifstream f_json(filename);
-            json j1 = json::parse(f_json);
-
-            SECTION("std::vector<uint8_t>")
+            SECTION(filename + ": std::vector<uint8_t>")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_ubjson(filename + ".ubjson", std::ios::binary);
                 std::vector<uint8_t> packed(
@@ -2175,8 +2217,12 @@ TEST_CASE("UBJSON roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("std::ifstream")
+            SECTION(filename + ": std::ifstream")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_ubjson(filename + ".ubjson", std::ios::binary);
                 json j2;
@@ -2186,8 +2232,12 @@ TEST_CASE("UBJSON roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("uint8_t* and size")
+            SECTION(filename + ": uint8_t* and size")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_ubjson(filename + ".ubjson", std::ios::binary);
                 std::vector<uint8_t> packed(
@@ -2200,15 +2250,19 @@ TEST_CASE("UBJSON roundtrips", "[hide]")
                 CHECK(j1 == j2);
             }
 
-            SECTION("output to output adapters")
+            SECTION(filename + ": output to output adapters")
             {
+                // parse JSON file
+                std::ifstream f_json(filename);
+                json j1 = json::parse(f_json);
+
                 // parse MessagePack file
                 std::ifstream f_ubjson(filename + ".ubjson", std::ios::binary);
                 std::vector<uint8_t> packed(
                     (std::istreambuf_iterator<char>(f_ubjson)),
                     std::istreambuf_iterator<char>());
 
-                SECTION("std::vector<uint8_t>")
+                SECTION(filename + ": output adapters: std::vector<uint8_t>")
                 {
                     std::vector<uint8_t> vec;
                     json::to_ubjson(j1, vec);
diff --git a/test/src/unit-udt.cpp b/test/src/unit-udt.cpp
index 9cfc6e97..f59999ee 100644
--- a/test/src/unit-udt.cpp
+++ b/test/src/unit-udt.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-unicode.cpp b/test/src/unit-unicode.cpp
index 95925dee..083dec1f 100644
--- a/test/src/unit-unicode.cpp
+++ b/test/src/unit-unicode.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/src/unit-wstring.cpp b/test/src/unit-wstring.cpp
new file mode 100644
index 00000000..3e83c932
--- /dev/null
+++ b/test/src/unit-wstring.cpp
@@ -0,0 +1,112 @@
+/*
+    __ _____ _____ _____
+ __|  |   __|     |   | |  JSON for Modern C++ (test suite)
+|  |  |__   |  |  | | | |  version 3.2.0
+|_____|_____|_____|_|___|  https://github.com/nlohmann/json
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
+
+Permission is hereby  granted, free of charge, to any  person obtaining a copy
+of this software and associated  documentation files (the "Software"), to deal
+in the Software  without restriction, including without  limitation the rights
+to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+#include "catch.hpp"
+
+#include <nlohmann/json.hpp>
+
+using nlohmann::json;
+
+bool wstring_is_utf16();
+bool wstring_is_utf16()
+{
+    return (std::wstring(L"💩") == std::wstring(L"\U0001F4A9"));
+}
+
+bool u16string_is_utf16();
+bool u16string_is_utf16()
+{
+    return (std::u16string(u"💩") == std::u16string(u"\U0001F4A9"));
+}
+
+bool u32string_is_utf32();
+bool u32string_is_utf32()
+{
+    return (std::u32string(U"💩") == std::u32string(U"\U0001F4A9"));
+}
+
+TEST_CASE("wide strings")
+{
+    SECTION("std::wstring")
+    {
+        if (wstring_is_utf16())
+        {
+            std::wstring w = L"[12.2,\"Ⴥaäö💤🧢\"]";
+            json j = json::parse(w);
+            CHECK(j.dump() == "[12.2,\"Ⴥaäö💤🧢\"]");
+        }
+    }
+
+    SECTION("invalid std::wstring")
+    {
+        if (wstring_is_utf16())
+        {
+            std::wstring w = L"\"\xDBFF";
+            CHECK_THROWS_AS(json::parse(w), json::parse_error&);
+        }
+    }
+
+    SECTION("std::u16string")
+    {
+        if (u16string_is_utf16())
+        {
+            std::u16string w = u"[12.2,\"Ⴥaäö💤🧢\"]";
+            json j = json::parse(w);
+            CHECK(j.dump() == "[12.2,\"Ⴥaäö💤🧢\"]");
+        }
+    }
+
+    SECTION("invalid std::u16string")
+    {
+        if (wstring_is_utf16())
+        {
+            std::u16string w = u"\"\xDBFF";
+            CHECK_THROWS_AS(json::parse(w), json::parse_error&);
+        }
+    }
+
+    SECTION("std::u32string")
+    {
+        if (u32string_is_utf32())
+        {
+            std::u32string w = U"[12.2,\"Ⴥaäö💤🧢\"]";
+            json j = json::parse(w);
+            CHECK(j.dump() == "[12.2,\"Ⴥaäö💤🧢\"]");
+        }
+    }
+
+    SECTION("invalid std::u32string")
+    {
+        if (u32string_is_utf32())
+        {
+            std::u32string w = U"\"\x110000";
+            CHECK_THROWS_AS(json::parse(w), json::parse_error&);
+        }
+    }
+}
diff --git a/test/src/unit.cpp b/test/src/unit.cpp
index 95659955..4f26dbdd 100644
--- a/test/src/unit.cpp
+++ b/test/src/unit.cpp
@@ -1,10 +1,11 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.1.2
+|  |  |__   |  |  | | | |  version 3.2.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
 Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
 
 Permission is hereby  granted, free of charge, to any  person obtaining a copy
diff --git a/test/thirdparty/catch/catch.hpp b/test/thirdparty/catch/catch.hpp
index 7c351e93..6b5129d6 100644
--- a/test/thirdparty/catch/catch.hpp
+++ b/test/thirdparty/catch/catch.hpp
@@ -1,6 +1,6 @@
 /*
- *  Catch v1.9.7
- *  Generated: 2017-08-10 23:49:15.233907
+ *  Catch v1.12.0
+ *  Generated: 2018-01-11 21:56:34.893972
  *  ----------------------------------------------------------
  *  This file has been merged from multiple headers. Please don't edit it directly
  *  Copyright (c) 2012 Two Blue Cubes Ltd. All rights reserved.
@@ -228,7 +228,12 @@
     ( defined __GNUC__  && ( __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3 )) ) || \
     ( defined __clang__ && __clang_major__ >= 3 )
 
-#define CATCH_INTERNAL_CONFIG_COUNTER
+// Use of __COUNTER__ is suppressed during code analysis in CLion/AppCode 2017.2.x and former,
+// because __COUNTER__ is not properly handled by it.
+// This does not affect compilation
+#if ( !defined __JETBRAINS_IDE__ || __JETBRAINS_IDE__ >= 20170300L )
+    #define CATCH_INTERNAL_CONFIG_COUNTER
+#endif
 
 #endif
 
@@ -309,10 +314,7 @@
 #if defined(CATCH_INTERNAL_CONFIG_CPP11_UNIQUE_PTR) && !defined(CATCH_CONFIG_CPP11_NO_UNIQUE_PTR) && !defined(CATCH_CONFIG_CPP11_UNIQUE_PTR) && !defined(CATCH_CONFIG_NO_CPP11)
 #   define CATCH_CONFIG_CPP11_UNIQUE_PTR
 #endif
-// Use of __COUNTER__ is suppressed if __JETBRAINS_IDE__ is #defined (meaning we're being parsed by a JetBrains IDE for
-// analytics) because, at time of writing, __COUNTER__ is not properly handled by it.
-// This does not affect compilation
-#if defined(CATCH_INTERNAL_CONFIG_COUNTER) && !defined(CATCH_CONFIG_NO_COUNTER) && !defined(CATCH_CONFIG_COUNTER) && !defined(__JETBRAINS_IDE__)
+#if defined(CATCH_INTERNAL_CONFIG_COUNTER) && !defined(CATCH_CONFIG_NO_COUNTER) && !defined(CATCH_CONFIG_COUNTER)
 #   define CATCH_CONFIG_COUNTER
 #endif
 #if defined(CATCH_INTERNAL_CONFIG_CPP11_SHUFFLE) && !defined(CATCH_CONFIG_CPP11_NO_SHUFFLE) && !defined(CATCH_CONFIG_CPP11_SHUFFLE) && !defined(CATCH_CONFIG_NO_CPP11)
@@ -1291,6 +1293,7 @@ namespace Catch {
 #ifdef _MSC_VER
 #pragma warning(push)
 #pragma warning(disable:4389) // '==' : signed/unsigned mismatch
+#pragma warning(disable:4018) // more "signed/unsigned mismatch"
 #pragma warning(disable:4312) // Converting int to T* using reinterpret_cast (issue on x64 platform)
 #endif
 
@@ -2166,6 +2169,12 @@ namespace Catch {
     };
 }
 
+#if !defined(CATCH_CONFIG_DISABLE_STRINGIFICATION)
+# define CATCH_INTERNAL_STRINGIFY(expr) #expr
+#else
+# define CATCH_INTERNAL_STRINGIFY(expr) "Disabled by CATCH_CONFIG_DISABLE_STRINGIFICATION"
+#endif
+
 #if defined(CATCH_CONFIG_FAST_COMPILE)
 ///////////////////////////////////////////////////////////////////////////////
 // We can speedup compilation significantly by breaking into debugger lower in
@@ -2181,7 +2190,7 @@ namespace Catch {
 // the exception before it propagates back up to the runner.
 #define INTERNAL_CATCH_TEST_NO_TRY( macroName, resultDisposition, expr ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #expr, resultDisposition ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(expr), resultDisposition ); \
         __catchResult.setExceptionGuard(); \
         CATCH_INTERNAL_SUPPRESS_PARENTHESES_WARNINGS \
         ( __catchResult <= expr ).endExpression(); \
@@ -2193,9 +2202,9 @@ namespace Catch {
 
 #define INTERNAL_CHECK_THAT_NO_TRY( macroName, matcher, resultDisposition, arg ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #arg ", " #matcher, resultDisposition ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(arg) ", " CATCH_INTERNAL_STRINGIFY(matcher), resultDisposition ); \
         __catchResult.setExceptionGuard(); \
-        __catchResult.captureMatch( arg, matcher, #matcher ); \
+        __catchResult.captureMatch( arg, matcher, CATCH_INTERNAL_STRINGIFY(matcher) ); \
         __catchResult.unsetExceptionGuard(); \
         INTERNAL_CATCH_REACT( __catchResult ) \
     } while( Catch::alwaysFalse() )
@@ -2214,7 +2223,7 @@ namespace Catch {
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_TEST( macroName, resultDisposition, expr ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #expr, resultDisposition ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(expr), resultDisposition ); \
         try { \
             CATCH_INTERNAL_SUPPRESS_PARENTHESES_WARNINGS \
             ( __catchResult <= expr ).endExpression(); \
@@ -2240,7 +2249,7 @@ namespace Catch {
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_NO_THROW( macroName, resultDisposition, expr ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #expr, resultDisposition ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(expr), resultDisposition ); \
         try { \
             static_cast<void>(expr); \
             __catchResult.captureResult( Catch::ResultWas::Ok ); \
@@ -2254,7 +2263,7 @@ namespace Catch {
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_THROWS( macroName, resultDisposition, matcher, expr ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #expr, resultDisposition, #matcher ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(expr), resultDisposition, CATCH_INTERNAL_STRINGIFY(matcher) ); \
         if( __catchResult.allowThrows() ) \
             try { \
                 static_cast<void>(expr); \
@@ -2271,7 +2280,7 @@ namespace Catch {
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CATCH_THROWS_AS( macroName, exceptionType, resultDisposition, expr ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #expr ", " #exceptionType, resultDisposition ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(expr) ", " CATCH_INTERNAL_STRINGIFY(exceptionType), resultDisposition ); \
         if( __catchResult.allowThrows() ) \
             try { \
                 static_cast<void>(expr); \
@@ -2314,9 +2323,9 @@ namespace Catch {
 ///////////////////////////////////////////////////////////////////////////////
 #define INTERNAL_CHECK_THAT( macroName, matcher, resultDisposition, arg ) \
     do { \
-        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, #arg ", " #matcher, resultDisposition ); \
+        Catch::ResultBuilder __catchResult( macroName, CATCH_INTERNAL_LINEINFO, CATCH_INTERNAL_STRINGIFY(arg) ", " CATCH_INTERNAL_STRINGIFY(matcher), resultDisposition ); \
         try { \
-            __catchResult.captureMatch( arg, matcher, #matcher ); \
+            __catchResult.captureMatch( arg, matcher, CATCH_INTERNAL_STRINGIFY(matcher) ); \
         } catch( ... ) { \
             __catchResult.useActiveException( resultDisposition | Catch::ResultDisposition::ContinueOnFailure ); \
         } \
@@ -2822,7 +2831,8 @@ namespace Detail {
             if (relativeOK) {
                 return true;
             }
-            return std::fabs(lhs_v - rhs.m_value) < rhs.m_margin;
+
+            return std::fabs(lhs_v - rhs.m_value) <= rhs.m_margin;
         }
 
         template <typename T, typename = typename std::enable_if<std::is_constructible<double, T>::value>::type>
@@ -2894,7 +2904,7 @@ namespace Detail {
             if (relativeOK) {
                 return true;
             }
-            return std::fabs(lhs - rhs.m_value) < rhs.m_margin;
+            return std::fabs(lhs - rhs.m_value) <= rhs.m_margin;
         }
 
         friend bool operator == ( Approx const& lhs, double rhs ) {
@@ -3852,6 +3862,12 @@ namespace Catch {
         Yes,
         No
     }; };
+    struct WaitForKeypress { enum When {
+        Never,
+        BeforeStart = 1,
+        BeforeExit = 2,
+        BeforeStartAndExit = BeforeStart | BeforeExit
+    }; };
 
     class TestSpec;
 
@@ -3965,13 +3981,15 @@ namespace Catch {
             showHelp( false ),
             showInvisibles( false ),
             filenamesAsTags( false ),
+            libIdentify( false ),
             abortAfter( -1 ),
             rngSeed( 0 ),
             verbosity( Verbosity::Normal ),
             warnings( WarnAbout::Nothing ),
             showDurations( ShowDurations::DefaultForReporter ),
             runOrder( RunTests::InDeclarationOrder ),
-            useColour( UseColour::Auto )
+            useColour( UseColour::Auto ),
+            waitForKeypress( WaitForKeypress::Never )
         {}
 
         bool listTests;
@@ -3986,6 +4004,7 @@ namespace Catch {
         bool showHelp;
         bool showInvisibles;
         bool filenamesAsTags;
+        bool libIdentify;
 
         int abortAfter;
         unsigned int rngSeed;
@@ -3995,6 +4014,7 @@ namespace Catch {
         ShowDurations::OrNot showDurations;
         RunTests::InWhatOrder runOrder;
         UseColour::YesOrNo useColour;
+        WaitForKeypress::When waitForKeypress;
 
         std::string outputFilename;
         std::string name;
@@ -5188,6 +5208,18 @@ namespace Catch {
         else
             throw std::runtime_error( "colour mode must be one of: auto, yes or no" );
     }
+    inline void setWaitForKeypress( ConfigData& config, std::string const& keypress ) {
+        std::string keypressLc = toLower( keypress );
+        if( keypressLc == "start" )
+            config.waitForKeypress = WaitForKeypress::BeforeStart;
+        else if( keypressLc == "exit" )
+            config.waitForKeypress = WaitForKeypress::BeforeExit;
+        else if( keypressLc == "both" )
+            config.waitForKeypress = WaitForKeypress::BeforeStartAndExit;
+        else
+            throw std::runtime_error( "keypress argument must be one of: start, exit or both. '" + keypress + "' not recognised" );
+    };
+
     inline void forceColour( ConfigData& config ) {
         config.useColour = UseColour::Yes;
     }
@@ -5323,6 +5355,14 @@ namespace Catch {
             .describe( "should output be colourised" )
             .bind( &setUseColour, "yes|no" );
 
+        cli["--libidentify"]
+            .describe( "report name and version according to libidentify standard" )
+            .bind( &ConfigData::libIdentify );
+
+        cli["--wait-for-keypress"]
+                .describe( "waits for a keypress before exiting" )
+                .bind( &setWaitForKeypress, "start|exit|both" );
+
         return cli;
     }
 
@@ -6700,7 +6740,10 @@ namespace Catch {
                 m_totals.assertions.passed++;
             }
             else if( !result.isOk() ) {
-                m_totals.assertions.failed++;
+                if( m_activeTestCase->getTestCaseInfo().okToFail() )
+                    m_totals.assertions.failedButOk++;
+                else
+                    m_totals.assertions.failed++;
             }
 
             // We have no use for the return value (whether messages should be cleared), because messages were made scoped
@@ -6889,12 +6932,6 @@ namespace Catch {
             Counts assertions = m_totals.assertions - prevAssertions;
             bool missingAssertions = testForMissingAssertions( assertions );
 
-            if( testCaseInfo.okToFail() ) {
-                std::swap( assertions.failedButOk, assertions.failed );
-                m_totals.assertions.failed -= assertions.failedButOk;
-                m_totals.assertions.failedButOk += assertions.failedButOk;
-            }
-
             SectionStats testCaseSectionStats( testCaseSection, assertions, duration, missingAssertions );
             m_reporter->sectionEnded( testCaseSectionStats );
         }
@@ -7101,6 +7138,13 @@ namespace Catch {
             m_cli.usage( Catch::cout(), processName );
             Catch::cout() << "For more detail usage please see the project docs\n" << std::endl;
         }
+        void libIdentify() {
+            Catch::cout()
+                    << std::left << std::setw(16) << "description: " << "A Catch test executable\n"
+                    << std::left << std::setw(16) << "category: " << "testframework\n"
+                    << std::left << std::setw(16) << "framework: " << "Catch Test\n"
+                    << std::left << std::setw(16) << "version: " << libraryVersion() << std::endl;
+        }
 
         int applyCommandLine( int argc, char const* const* const argv, OnUnusedOptions::DoWhat unusedOptionBehaviour = OnUnusedOptions::Fail ) {
             try {
@@ -7108,6 +7152,8 @@ namespace Catch {
                 m_unusedTokens = m_cli.parseInto( Clara::argsToVector( argc, argv ), m_configData );
                 if( m_configData.showHelp )
                     showHelp( m_configData.processName );
+                if( m_configData.libIdentify )
+                    libIdentify();
                 m_config.reset();
             }
             catch( std::exception& ex ) {
@@ -7164,7 +7210,36 @@ namespace Catch {
     #endif
 
         int run() {
-            if( m_configData.showHelp )
+            if( ( m_configData.waitForKeypress & WaitForKeypress::BeforeStart ) != 0 ) {
+                Catch::cout() << "...waiting for enter/ return before starting" << std::endl;
+                static_cast<void>(std::getchar());
+            }
+            int exitCode = runInternal();
+            if( ( m_configData.waitForKeypress & WaitForKeypress::BeforeExit ) != 0 ) {
+                Catch::cout() << "...waiting for enter/ return before exiting, with code: " << exitCode << std::endl;
+                static_cast<void>(std::getchar());
+            }
+            return exitCode;
+        }
+
+        Clara::CommandLine<ConfigData> const& cli() const {
+            return m_cli;
+        }
+        std::vector<Clara::Parser::Token> const& unusedTokens() const {
+            return m_unusedTokens;
+        }
+        ConfigData& configData() {
+            return m_configData;
+        }
+        Config& config() {
+            if( !m_config )
+                m_config = new Config( m_configData );
+            return *m_config;
+        }
+    private:
+
+        int runInternal() {
+            if( m_configData.showHelp || m_configData.libIdentify )
                 return 0;
 
             try
@@ -7188,21 +7263,6 @@ namespace Catch {
             }
         }
 
-        Clara::CommandLine<ConfigData> const& cli() const {
-            return m_cli;
-        }
-        std::vector<Clara::Parser::Token> const& unusedTokens() const {
-            return m_unusedTokens;
-        }
-        ConfigData& configData() {
-            return m_configData;
-        }
-        Config& config() {
-            if( !m_config )
-                m_config = new Config( m_configData );
-            return *m_config;
-        }
-    private:
         Clara::CommandLine<ConfigData> m_cli;
         std::vector<Clara::Parser::Token> m_unusedTokens;
         ConfigData m_configData;
@@ -7227,7 +7287,7 @@ namespace Catch {
 namespace Catch {
 
     struct RandomNumberGenerator {
-        typedef std::ptrdiff_t result_type;
+        typedef unsigned int result_type;
 
         result_type operator()( result_type n ) const { return std::rand() % n; }
 
@@ -8148,7 +8208,7 @@ namespace Catch {
 
     std::string AssertionResult::getExpression() const {
         if( isFalseTest( m_info.resultDisposition ) )
-            return '!' + capturedExpressionWithSecondArgument(m_info.capturedExpression, m_info.secondArg);
+            return "!(" + capturedExpressionWithSecondArgument(m_info.capturedExpression, m_info.secondArg) + ")";
         else
             return capturedExpressionWithSecondArgument(m_info.capturedExpression, m_info.secondArg);
     }
@@ -8406,7 +8466,7 @@ namespace Catch {
     }
 
     inline Version libraryVersion() {
-        static Version version( 1, 9, 7, "", 0 );
+        static Version version( 1, 12, 0, "", 0 );
         return version;
     }
 
@@ -10220,12 +10280,12 @@ namespace Catch {
 
             bool includeResults = m_config->includeSuccessfulResults() || !result.isOk();
 
-            if( includeResults ) {
+            if( includeResults || result.getResultType() == ResultWas::Warning ) {
                 // Print any info messages in <Info> tags.
                 for( std::vector<MessageInfo>::const_iterator it = assertionStats.infoMessages.begin(), itEnd = assertionStats.infoMessages.end();
                      it != itEnd;
                      ++it ) {
-                    if( it->type == ResultWas::Info ) {
+                    if( it->type == ResultWas::Info && includeResults ) {
                         m_xml.scopedElement( "Info" )
                                 .writeText( it->message );
                     } else if ( it->type == ResultWas::Warning ) {