Merge branch 'develop' of https://github.com/nlohmann/json into feature/bson

Conflicts: include/nlohmann/detail/input/binary_reader.hpp single_include/nlohmann/json.hpp src/unit-bson.cpp
2018-10-17 19:06:22 +02:00 · 2018-10-17 19:06:22 +02:00 · 2a63869159
commit 2a63869159
parent 978c3c4116 4b2a00641c
110 changed files with 2497 additions and 1418 deletions
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@ -54,7 +54,7 @@ To make changes, you need to edit the following files:
 ## Please don't
- The C++11 support varies between different **compilers** and versions. Please note the [list of supported compilers](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers). Some compilers like GCC 4.8 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with `#ifdef`s or other means.
+- The C++11 support varies between different **compilers** and versions. Please note the [list of supported compilers](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers). Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with `#ifdef`s or other means.
 - Specifically, I am aware of compilation problems with **Microsoft Visual Studio** (there even is an [issue label](https://github.com/nlohmann/json/issues?utf8=✓&q=label%3A%22visual+studio%22+) for these kind of bugs). I understand that even in 2016, complete C++11 support isn't there yet. But please also understand that I do not want to drop features or uglify the code just to make Microsoft's sub-standard compiler happy. The past has shown that there are ways to express the functionality such that the code compiles with the most recent MSVC - unfortunately, this is not the main objective of the project.
 - Please refrain from proposing changes that would **break [JSON](http://json.org) conformance**. If you propose a conformant extension of JSON to be supported by the library, please motivate this extension.
  - We shall not extend the library to **support comments**. There is quite some [controversy](https://www.reddit.com/r/programming/comments/4v6chu/why_json_doesnt_support_comments_douglas_crockford/) around this topic, and there were quite some [issues](https://github.com/nlohmann/json/issues/376) on this. We believe that JSON is fine without comments.
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@ -13,7 +13,7 @@ Read the [Contribution Guidelines](https://github.com/nlohmann/json/blob/develop
 ## Please don't
- The C++11 support varies between different **compilers** and versions. Please note the [list of supported compilers](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers). Some compilers like GCC 4.8 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with `#ifdef`s or other means.
+- The C++11 support varies between different **compilers** and versions. Please note the [list of supported compilers](https://github.com/nlohmann/json/blob/master/README.md#supported-compilers). Some compilers like GCC 4.7 (and earlier), Clang 3.3 (and earlier), or Microsoft Visual Studio 13.0 and earlier are known not to work due to missing or incomplete C++11 support. Please refrain from proposing changes that work around these compiler's limitations with `#ifdef`s or other means.
 - Specifically, I am aware of compilation problems with **Microsoft Visual Studio** (there even is an [issue label](https://github.com/nlohmann/json/issues?utf8=✓&q=label%3A%22visual+studio%22+) for these kind of bugs). I understand that even in 2016, complete C++11 support isn't there yet. But please also understand that I do not want to drop features or uglify the code just to make Microsoft's sub-standard compiler happy. The past has shown that there are ways to express the functionality such that the code compiles with the most recent MSVC - unfortunately, this is not the main objective of the project.
 - Please refrain from proposing changes that would **break [JSON](http://json.org) conformance**. If you propose a conformant extension of JSON to be supported by the library, please motivate this extension.
 - Please do not open pull requests that address **multiple issues**.
--- a/.travis.yml
+++ b/.travis.yml
@ -161,11 +161,22 @@ matrix:
  - os: osx
    osx_image: xcode9.4
  - os: osx
    osx_image: xcode10
  # Linux / GCC
  - os: linux
    compiler: gcc
-    env: COMPILER=g++-4.9
+    env: compiler=g++-4.8
    addons:
      apt:
        sources: ['ubuntu-toolchain-r-test']
        packages: ['g++-4.8', 'ninja-build']
  - os: linux
    compiler: gcc
    env: compiler=g++-4.9
    addons:
      apt:
        sources: ['ubuntu-toolchain-r-test']
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 3.8)
 ## PROJECT
 ## name and version
 ##
-project(nlohmann_json VERSION 3.2.0 LANGUAGES CXX)
+project(nlohmann_json VERSION 3.3.0 LANGUAGES CXX)
 ##
 ## INCLUDE
@ -86,10 +86,10 @@ include(CMakePackageConfigHelpers)
 write_basic_package_version_file(
    ${NLOHMANN_JSON_CMAKE_VERSION_CONFIG_FILE} COMPATIBILITY SameMajorVersion
 )
-configure_package_config_file(
+configure_file(
    ${NLOHMANN_JSON_CMAKE_CONFIG_TEMPLATE}
    ${NLOHMANN_JSON_CMAKE_PROJECT_CONFIG_FILE}
-    INSTALL_DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
+    @ONLY
 )
 install(
@ -121,4 +121,3 @@ install(
    NAMESPACE ${PROJECT_NAME}::
    DESTINATION ${NLOHMANN_JSON_CONFIG_INSTALL_DIR}
 )
 export(PACKAGE ${PROJECT_NAME})
--- a/ChangeLog.md
+++ b/ChangeLog.md
@ -1,7 +1,75 @@
 # 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)
+## [v3.3.0](https://github.com/nlohmann/json/releases/tag/v3.3.0) (2018-10-05)
 [Full Changelog](https://github.com/nlohmann/json/compare/v3.2.0...v3.3.0)
 - When key is not found print the key name into error too [\#1273](https://github.com/nlohmann/json/issues/1273)
 - Visual Studio 2017 15.8.5 "conditional expression is constant" warning on Line 1851 in json.hpp [\#1268](https://github.com/nlohmann/json/issues/1268)
 - how can we get this working on WSL? [\#1264](https://github.com/nlohmann/json/issues/1264)
 - Help needed [\#1259](https://github.com/nlohmann/json/issues/1259)
 - A way to get to a JSON values "key" [\#1258](https://github.com/nlohmann/json/issues/1258)
 - Two blackslashes on json output file [\#1253](https://github.com/nlohmann/json/issues/1253)
 - Including nlohmann the badwrong way. [\#1250](https://github.com/nlohmann/json/issues/1250)
 - how to build with clang? [\#1247](https://github.com/nlohmann/json/issues/1247)
 - Cmake target\_link\_libraries unable to find nlohmann\_json since version 3.2.0 [\#1243](https://github.com/nlohmann/json/issues/1243)
 - \[Question\] Access to end\(\) iterator reference [\#1242](https://github.com/nlohmann/json/issues/1242)
 - Parsing different json format [\#1241](https://github.com/nlohmann/json/issues/1241)
 - Parsing Multiple JSON Files [\#1240](https://github.com/nlohmann/json/issues/1240)
 - Doesn't compile under C++17 [\#1239](https://github.com/nlohmann/json/issues/1239)
 - Conversion operator for nlohmann::json is not SFINAE friendly [\#1237](https://github.com/nlohmann/json/issues/1237)
 - Custom deserialization of number\_float\_t [\#1236](https://github.com/nlohmann/json/issues/1236)
 - Move tests to a separate repo [\#1235](https://github.com/nlohmann/json/issues/1235)
 - deprecated-declarations warnings when compiling tests with GCC 8.2.1. [\#1233](https://github.com/nlohmann/json/issues/1233)
 - Incomplete type with json\_fwd.hpp [\#1232](https://github.com/nlohmann/json/issues/1232)
 - Parse Error [\#1229](https://github.com/nlohmann/json/issues/1229)
 - json::get function with argument [\#1227](https://github.com/nlohmann/json/issues/1227)
 - questions regarding from\_json [\#1226](https://github.com/nlohmann/json/issues/1226)
 - Lambda in unevaluated context [\#1225](https://github.com/nlohmann/json/issues/1225)
 - NLohmann doesn't compile when enabling strict warning policies [\#1224](https://github.com/nlohmann/json/issues/1224)
 - Creating array of objects [\#1223](https://github.com/nlohmann/json/issues/1223)
 - Somewhat unhelpful error message "cannot use operator\[\] with object" [\#1220](https://github.com/nlohmann/json/issues/1220)
 - single\_include json.hpp [\#1218](https://github.com/nlohmann/json/issues/1218)
 - Maps with enum class keys which are convertible to JSON strings should be converted to JSON dictionaries [\#1217](https://github.com/nlohmann/json/issues/1217)
 - Adding JSON Array to the Array  [\#1216](https://github.com/nlohmann/json/issues/1216)
 - Best way to output a vector of a given type to json [\#1215](https://github.com/nlohmann/json/issues/1215)
 - compiler warning: double definition of macro JSON\_INTERNAL\_CATCH  [\#1213](https://github.com/nlohmann/json/issues/1213)
 - Compilation error when using MOCK\_METHOD1 from GMock and nlohmann::json [\#1212](https://github.com/nlohmann/json/issues/1212)
 - Issues parsing a previously encoded binary \(non-UTF8\) string. [\#1211](https://github.com/nlohmann/json/issues/1211)
 - Yet another ordering question: char \* and parse\(\) [\#1209](https://github.com/nlohmann/json/issues/1209)
 - Error using gcc 8.1.0 on Ubuntu 14.04 [\#1207](https://github.com/nlohmann/json/issues/1207)
 - "type must be string, but is " std::string\(j.type\_name\(\)  [\#1206](https://github.com/nlohmann/json/issues/1206)
 - Returning empty json object from a function of type const json& ? [\#1205](https://github.com/nlohmann/json/issues/1205)
 - VS2017 compiler suggests using constexpr if [\#1204](https://github.com/nlohmann/json/issues/1204)
 - Template instatiation error on compiling [\#1203](https://github.com/nlohmann/json/issues/1203)
 - Soften the landing when dumping non-UTF8 strings \(type\_error.316 exception\) [\#1198](https://github.com/nlohmann/json/issues/1198)
 - BUG - json dump field with unicode -\> array of ints \(instead of string\) [\#1197](https://github.com/nlohmann/json/issues/1197)
 - Compile error using Code::Blocks // mingw-w64 GCC 8.1.0 - "Incomplete Type" [\#1193](https://github.com/nlohmann/json/issues/1193)
 - SEGFAULT on arm target  [\#1190](https://github.com/nlohmann/json/issues/1190)
 - Compiler crash with old Clang [\#1179](https://github.com/nlohmann/json/issues/1179)
 - Custom Precision on floating point numbers [\#1170](https://github.com/nlohmann/json/issues/1170)
 - Can we have a json\_view class like std::string\_view? [\#1158](https://github.com/nlohmann/json/issues/1158)
 - improve error handling [\#1152](https://github.com/nlohmann/json/issues/1152)
 - We should remove static\_asserts [\#960](https://github.com/nlohmann/json/issues/960)
 - Fix warning C4127: conditional expression is constant [\#1272](https://github.com/nlohmann/json/pull/1272) ([antonioborondo](https://github.com/antonioborondo))
 - Turn off additional deprecation warnings for GCC. [\#1271](https://github.com/nlohmann/json/pull/1271) ([chuckatkins](https://github.com/chuckatkins))
 - docs: Add additional CMake documentation [\#1270](https://github.com/nlohmann/json/pull/1270) ([chuckatkins](https://github.com/chuckatkins))
 - unit-testsuites.cpp: fix hangup if file not found [\#1262](https://github.com/nlohmann/json/pull/1262) ([knilch0r](https://github.com/knilch0r))
 - Fix broken cmake imported target alias [\#1260](https://github.com/nlohmann/json/pull/1260) ([chuckatkins](https://github.com/chuckatkins))
 - GCC 48 [\#1257](https://github.com/nlohmann/json/pull/1257) ([henryiii](https://github.com/henryiii))
 - Add version and license to meson.build [\#1252](https://github.com/nlohmann/json/pull/1252) ([koponomarenko](https://github.com/koponomarenko))
 - \#1179 Reordered the code. It seems to stop clang 3.4.2 in RHEL 7 from crash… [\#1249](https://github.com/nlohmann/json/pull/1249) ([LEgregius](https://github.com/LEgregius))
 - Use a version check to provide backwards comatible CMake imported target names [\#1245](https://github.com/nlohmann/json/pull/1245) ([chuckatkins](https://github.com/chuckatkins))
 - Fix issue \#1237 [\#1238](https://github.com/nlohmann/json/pull/1238) ([theodelrieu](https://github.com/theodelrieu))
 - Add a get overload taking a parameter. [\#1231](https://github.com/nlohmann/json/pull/1231) ([theodelrieu](https://github.com/theodelrieu))
 - Move lambda out of unevaluated context [\#1230](https://github.com/nlohmann/json/pull/1230) ([mandreyel](https://github.com/mandreyel))
 - Remove static asserts [\#1228](https://github.com/nlohmann/json/pull/1228) ([theodelrieu](https://github.com/theodelrieu))
 - Better error 305 [\#1221](https://github.com/nlohmann/json/pull/1221) ([rivertam](https://github.com/rivertam))
 - Fix \#1213 [\#1214](https://github.com/nlohmann/json/pull/1214) ([simnalamburt](https://github.com/simnalamburt))
 - Export package to allow builds without installing [\#1202](https://github.com/nlohmann/json/pull/1202) ([dennisfischer](https://github.com/dennisfischer))
 ## [v3.2.0](https://github.com/nlohmann/json/releases/tag/v3.2.0) (2018-08-20)
 [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)
@ -964,7 +1032,6 @@ All notable changes to this project will be documented in this file. This projec
 - json::diff generates incorrect patch when removing multiple array elements. [\#269](https://github.com/nlohmann/json/issues/269)
 - Docs - What does Json\[key\] return? [\#267](https://github.com/nlohmann/json/issues/267)
 - Compiler Errors With JSON.hpp [\#265](https://github.com/nlohmann/json/issues/265)
 - Throw exception instead of crashing my app [\#264](https://github.com/nlohmann/json/issues/264)
 - Ambiguous push\_back and operator+= overloads [\#263](https://github.com/nlohmann/json/issues/263)
 - Preseving order of items in json [\#262](https://github.com/nlohmann/json/issues/262)
 - '\' char problem in strings [\#261](https://github.com/nlohmann/json/issues/261)
--- a/1
+++ b/1
@ -12,6 +12,7 @@ SRCS = include/nlohmann/json.hpp \
       include/nlohmann/detail/input/json_sax.hpp \
       include/nlohmann/detail/input/lexer.hpp \
       include/nlohmann/detail/input/parser.hpp \
       include/nlohmann/detail/input/position_t.hpp \
       include/nlohmann/detail/iterators/internal_iterator.hpp \
       include/nlohmann/detail/iterators/iter_impl.hpp \
       include/nlohmann/detail/iterators/iteration_proxy.hpp \
--- a/README.md
+++ b/README.md
@ -5,6 +5,7 @@
 [![Coverage Status](https://img.shields.io/coveralls/nlohmann/json.svg)](https://coveralls.io/r/nlohmann/json)
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/5550/badge.svg)](https://scan.coverity.com/projects/nlohmann-json)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/f3732b3327e34358a0e9d1fe9f661f08)](https://www.codacy.com/app/nlohmann/json?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=nlohmann/json&amp;utm_campaign=Badge_Grade)
 [![Language grade: C/C++](https://img.shields.io/lgtm/grade/cpp/g/nlohmann/json.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/nlohmann/json/context:cpp)
 [![Try online](https://img.shields.io/badge/try-online-blue.svg)](https://wandbox.org/permlink/TarF5pPn9NtHQjhf)
 [![Documentation](https://img.shields.io/badge/docs-doxygen-blue.svg)](http://nlohmann.github.io/json)
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/nlohmann/json/master/LICENSE.MIT)
@ -15,6 +16,8 @@
 - [Design goals](#design-goals)
 - [Integration](#integration)
  - [CMake](#cmake)
  - [Package Managers](#package-managers)
 - [Examples](#examples)
  - [JSON as first-class data type](#json-as-first-class-data-type)
  - [Serialization / Deserialization](#serialization--deserialization)
@ -68,6 +71,71 @@ to the files you want to process JSON and set the necessary switches to enable C
 You can further use file [`include/nlohmann/json_fwd.hpp`](https://github.com/nlohmann/json/blob/develop/include/nlohmann/json_fwd.hpp) for forward-declarations. The installation of json_fwd.hpp (as part of cmake's install step), can be achieved by setting `-DJSON_MultipleHeaders=ON`.
 ### CMake
 You can also use the `nlohmann_json::nlohmann_json` interface target in CMake.  This target populates the appropriate usage requirements for `INTERFACE_INCLUDE_DIRECTORIES` to point to the appropriate include directories and `INTERFACE_COMPILE_FEATURES` for the necessary C++11 flags.
 #### External
 To use this library from a CMake project, you can locate it directly with `find_package()` and use the namespaced imported target from the generated package configuration:
 ```cmake
 # CMakeLists.txt
 find_package(nlohmann_json 3.2.0 REQUIRED)
 ...
 add_library(foo ...)
 ...
 target_link_libraries(foo PRIVATE nlohmann_json::nlohmann_json)
 ```
 The package configuration file, `nlohmann_jsonConfig.cmake`, can be used either from an install tree or directly out of the build tree.
 #### Embedded
 To embed the library directly into an existing CMake project, place the entire source tree in a subdirectory and call `add_subdirectory()` in your `CMakeLists.txt` file:
 ```cmake
 # Typically you don't care so much for a third party library's tests to be
 # run from your own project's code.
 set(JSON_BuildTests OFF CACHE INTERNAL "")
 # Don't use include(nlohmann_json/CMakeLists.txt) since that carries with it
 # inintended consequences that will break the build.  It's generally
 # discouraged (although not necessarily well documented as such) to use
 # include(...) for pulling in other CMake projects anyways.
 add_subdirectory(nlohmann_json)
 ...
 add_library(foo ...)
 ...
 target_link_libraries(foo PRIVATE nlohmann_json::nlohmann_json)
 ```
 #### Supporting Both
 To allow your project to support either an externally supplied or an embedded JSON library, you can use a pattern akin to the following:
 ``` cmake
 # Top level CMakeLists.txt
 project(FOO)
 ...
 option(FOO_USE_EXTERNAL_JSON "Use an external JSON library" OFF)
 ...
 add_subdirectory(thirdparty)
 ...
 add_library(foo ...)
 ...
 # Note that the namespaced target will always be available regardless of the
 # import method
 target_link_libraries(foo PRIVATE nlohmann_json::nlohmann_json)
 ```
 ```cmake
 # thirdparty/CMakeLists.txt
 ...
 if(FOO_USE_EXTERNAL_JSON)
  find_package(nlohmann_json 3.2.0 REQUIRED)
 else()
  set(JSON_BuildTests OFF CACHE INTERNAL "")
  add_subdirectory(nlohmann_json)
 endif()
 ...
 ```
 `thirdparty/nlohmann_json` is then a complete copy of this source tree.
 ### Package Managers
 :beer: If you are using OS X and [Homebrew](http://brew.sh), just type `brew tap nlohmann/json` and `brew install nlohmann_json` and you're set. If you want the bleeding edge rather than the latest release, use `brew install nlohmann_json --HEAD`.
@ -226,12 +294,15 @@ json j_string = "this is a string";
 std::string cpp_string = j_string;
 // retrieve the string value (explicit JSON to std::string conversion)
 auto cpp_string2 = j_string.get<std::string>();
 // retrieve the string value (alternative explicit JSON to std::string conversion)
 std::string cpp_string3;
 j_string.get_to(cpp_string3);
 // retrieve the serialized value (explicit JSON serialization)
 std::string serialized_string = j_string.dump();
 // output of original string
-std::cout << cpp_string << " == " << cpp_string2 << " == " << j_string.get<std::string>() << '\n';
+std::cout << cpp_string << " == " << cpp_string2 << " == " << cpp_string3 << " == " << j_string.get<std::string>() << '\n';
 // output of serialized value
 std::cout << j_string << " == " << serialized_string << std::endl;
 ```
@ -642,15 +713,15 @@ namespace ns {
    }
    void from_json(const json& j, person& p) {
-        p.name = j.at("name").get<std::string>();
+        j.at("name").get_to(p.name);
-        p.address = j.at("address").get<std::string>();
+        j.at("address").get_to(p.address);
-        p.age = j.at("age").get<int>();
+        j.at("age").get_to(p.age);
    }
 } // namespace ns
 ```
 That's all! When calling the `json` constructor with your type, your custom `to_json` method will be automatically called.
-Likewise, when calling `get<your_type>()`, the `from_json` method will be called.
+Likewise, when calling `get<your_type>()` or `get_to(your_type&)`, the `from_json` method will be called.
 Some important things:
@ -658,9 +729,8 @@ Some important things:
 * 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.
+* 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)>();` or `your_json.get_to(your_variable);` instead.
 * You do not need to add serializers or deserializers for STL types like `std::vector`: the library already implements these.
 * Be careful with the definition order of the `from_json`/`to_json` functions: If a type `B` has a member of type `A`, you **MUST** define `to_json(A)` before `to_json(B)`. Look at [issue 561](https://github.com/nlohmann/json/issues/561) for more details.
 #### How do I convert third-party types?
@ -842,7 +912,7 @@ 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 - 8.2 (and possibly later)
+- GCC 4.8 - 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)
@ -852,7 +922,7 @@ I would be happy to learn about other compilers/versions.
 Please note:
- GCC 4.8 does not work because of two bugs ([55817](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55817) and [57824](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57824)) in the C++11 support. Note there is a [pull request](https://github.com/nlohmann/json/pull/212) to fix some of the issues.
+- GCC 4.8 has a bug [57824](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57824)): multiline raw strings cannot be the arguments to macros. Don't use multiline raw strings directly in macros with this compiler.
 - Android defaults to using very old compilers and C++ libraries. To fix this, add the following to your `Application.mk`. This will switch to the LLVM C++ library, the Clang compiler, and enable C++11 and other features disabled by default.
    ```
@ -871,6 +941,7 @@ The following compilers are currently used in continuous integration at [Travis]
 | Compiler        | Operating System             | Version String |
 |-----------------|------------------------------|----------------|
 | GCC 4.8.5       | Ubuntu 14.04.5 LTS           | g++-4.8 (Ubuntu 4.8.5-2ubuntu1~14.04.2) 4.8.5 |
 | 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 |
@ -895,6 +966,7 @@ The following compilers are currently used in continuous integration at [Travis]
 | 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) |
 | Clang Xcode 10.0 | OSX 10.13.3 | Apple LLVM version 10.0.0 (clang-1000.11.45.2) |
 | 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 15.7.180.61344, MSVC 19.14.26433.0 |
@ -1045,7 +1117,7 @@ I deeply appreciate the help of the following people.
 - [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
+- [Chuck Atkins](https://github.com/chuckatkins) adjusted the CMake files to the CMake packaging guidelines and provided documentation for the CMake integration.
 - [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`.
@ -1056,6 +1128,16 @@ I deeply appreciate the help of the following people.
 - [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.
 - [David Guthrie](https://github.com/LEgregius) fixed a subtle compilation error with Clang 3.4.2.
 - [Dennis Fischer](https://github.com/dennisfischer) allowed to call `find_package` without installing the library.
 - [Hyeon Kim](https://github.com/simnalamburt) fixed an issue with a double macro definition.
 - [Ben Berman](https://github.com/rivertam) made some error messages more understandable.
 - [zakalibit](https://github.com/zakalibit) fixed a compilation problem with the Intel C++ compiler.
 - [mandreyel](https://github.com/mandreyel) fixed a compilation problem.
 - [Kostiantyn Ponomarenko](https://github.com/koponomarenko) added version and license information to the Meson build file.
 - [Henry Schreiner](https://github.com/henryiii) added support for GCC 4.8.
 - [knilch](https://github.com/knilch0r) made sure the test suite does not stall when run in the wrong directory.
 - [Antonio Borondo](https://github.com/antonioborondo) fixed an MSVC 2017 warning.
 Thanks a lot for helping out! Please [let me know](mailto:mail@nlohmann.me) if I forgot someone.
--- a/benchmarks/thirdparty/benchmark/CMakeLists.txt
+++ b/benchmarks/thirdparty/benchmark/CMakeLists.txt
@ -140,7 +140,7 @@ else()
      if (GCC_RANLIB)
        set(CMAKE_RANLIB ${GCC_RANLIB})
      endif()
-    elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
+    elseif("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
      include(llvm-toolchain)
    endif()
  endif()
@ -165,7 +165,7 @@ else()
 endif()
 if (BENCHMARK_USE_LIBCXX)
-  if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
    add_cxx_compiler_flag(-stdlib=libc++)
  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
          "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
--- a/benchmarks/thirdparty/benchmark/cmake/HandleGTest.cmake
+++ b/benchmarks/thirdparty/benchmark/cmake/HandleGTest.cmake
@ -7,7 +7,7 @@ macro(build_external_gtest)
  include(ExternalProject)
  set(GTEST_FLAGS "")
  if (BENCHMARK_USE_LIBCXX)
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
      list(APPEND GTEST_FLAGS -stdlib=libc++)
    else()
      message(WARNING "Unsupported compiler (${CMAKE_CXX_COMPILER}) when using libc++")
--- a/cmake/config.cmake.in
+++ b/cmake/config.cmake.in
@ -1,5 +1,15 @@
-@PACKAGE_INIT@
+include(FindPackageHandleStandardArgs)
 set(${CMAKE_FIND_PACKAGE_NAME}_CONFIG ${CMAKE_CURRENT_LIST_FILE})
 find_package_handle_standard_args(@PROJECT_NAME@ CONFIG_MODE)
 if(NOT TARGET @PROJECT_NAME@::@NLOHMANN_JSON_TARGET_NAME@)
    include("${CMAKE_CURRENT_LIST_DIR}/@NLOHMANN_JSON_TARGETS_EXPORT_NAME@.cmake")
    if((NOT TARGET @NLOHMANN_JSON_TARGET_NAME@) AND
       (NOT @PROJECT_NAME@_FIND_VERSION OR
        @PROJECT_NAME@_FIND_VERSION VERSION_LESS 3.2.0))
        add_library(@NLOHMANN_JSON_TARGET_NAME@ INTERFACE IMPORTED)
        set_target_properties(@NLOHMANN_JSON_TARGET_NAME@ PROPERTIES
            INTERFACE_LINK_LIBRARIES @PROJECT_NAME@::@NLOHMANN_JSON_TARGET_NAME@
        )
    endif()
 endif()
 check_required_components("@PROJECT_NAME@")
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "JSON for Modern C++"
-PROJECT_NUMBER         = 3.2.0
+PROJECT_NUMBER         = 3.3.0
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = .
--- a/doc/avatars.png
+++ b/doc/avatars.png
--- a/doc/examples/README.link
+++ b/doc/examples/README.link
@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/VexEaSCbbvOOXsPt"><b>online</b></a>
+<a target="_blank" href="https://wandbox.org/permlink/RWX63GizBsDZ5EnQ"><b>online</b></a>
--- a/doc/examples/get_to.cpp
+++ b/doc/examples/get_to.cpp
@ -0,0 +1,60 @@
 #include <iostream>
 #include <unordered_map>
 #include <nlohmann/json.hpp>
 using json = nlohmann::json;
 int main()
 {
    // create a JSON value with different types
    json json_types =
    {
        {"boolean", true},
        {
            "number", {
                {"integer", 42},
                {"floating-point", 17.23}
            }
        },
        {"string", "Hello, world!"},
        {"array", {1, 2, 3, 4, 5}},
        {"null", nullptr}
    };
    bool v1;
    int v2;
    short v3;
    float v4;
    int v5;
    std::string v6;
    std::vector<short> v7;
    std::unordered_map<std::string, json> v8;
    // use explicit conversions
    json_types["boolean"].get_to(v1);
    json_types["number"]["integer"].get_to(v2);
    json_types["number"]["integer"].get_to(v3);
    json_types["number"]["floating-point"].get_to(v4);
    json_types["number"]["floating-point"].get_to(v5);
    json_types["string"].get_to(v6);
    json_types["array"].get_to(v7);
    json_types.get_to(v8);
    // print the conversion results
    std::cout << v1 << '\n';
    std::cout << v2 << ' ' << v3 << '\n';
    std::cout << v4 << ' ' << v5 << '\n';
    std::cout << v6 << '\n';
    for (auto i : v7)
    {
        std::cout << i << ' ';
    }
    std::cout << "\n\n";
    for (auto i : v8)
    {
        std::cout << i.first << ": " << i.second << '\n';
    }
 }
--- a/doc/examples/get_to.link
+++ b/doc/examples/get_to.link
@ -0,0 +1 @@
 <a target="_blank" href="https://wandbox.org/permlink/QxtxaO6JZAMJPutC"><b>online</b></a>
--- a/doc/examples/get_to.output
+++ b/doc/examples/get_to.output
@ -0,0 +1,11 @@
 1
 42 42
 17.23 17
 Hello, world!
 1 2 3 4 5 
 string: "Hello, world!"
 number: {"floating-point":17.23,"integer":42}
 null: null
 boolean: true
 array: [1,2,3,4,5]
--- a/doc/examples/json_pointer.output
+++ b/doc/examples/json_pointer.output
@ -1,3 +1,3 @@
-[json.exception.parse_error.107] parse error at 1: JSON pointer must be empty or begin with '/' - was: 'foo'
+[json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'foo'
 [json.exception.parse_error.108] parse error: escape character '~' must be followed with '0' or '1'
 [json.exception.parse_error.108] parse error: escape character '~' must be followed with '0' or '1'
--- a/doc/examples/meta.output
+++ b/doc/examples/meta.output
@ -2,7 +2,7 @@
    "compiler": {
        "c++": "201103",
        "family": "clang",
-        "version": "9.1.0 (clang-902.0.39.2)"
+        "version": "10.0.0 (clang-1000.10.43.1)"
    },
    "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": 2,
+        "minor": 3,
        "patch": 0,
-        "string": "3.2.0"
+        "string": "3.3.0"
    }
 }
--- a/doc/examples/parse_error.output
+++ b/doc/examples/parse_error.output
@ -1,3 +1,3 @@
-message: [json.exception.parse_error.101] parse error at 8: syntax error - unexpected ']'; expected '[', '{', or a literal
+message: [json.exception.parse_error.101] parse error at line 1, column 8: syntax error while parsing value - unexpected ']'; expected '[', '{', or a literal
 exception id: 101
 byte position of error: 8
--- a/doc/index.md
+++ b/doc/index.md
@ -306,4 +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 3.2.0
+@version 3.3.0
--- a/doc/json.gif
+++ b/doc/json.gif
--- a/include/nlohmann/adl_serializer.hpp
+++ b/include/nlohmann/adl_serializer.hpp
@ -46,4 +46,4 @@ struct adl_serializer
        ::nlohmann::to_json(j, std::forward<ValueType>(val));
    }
 };
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/conversions/from_json.hpp
+++ b/include/nlohmann/detail/conversions/from_json.hpp
@ -299,7 +299,7 @@ void from_json(const BasicJsonType& j, std::pair<A1, A2>& p)
 }
 template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
-void from_json_tuple_impl(const BasicJsonType& j, Tuple& t, index_sequence<Idx...>)
+void from_json_tuple_impl(const BasicJsonType& j, Tuple& t, index_sequence<Idx...> /*unused*/)
 {
    t = std::make_tuple(j.at(Idx).template get<typename std::tuple_element<Idx, Tuple>::type>()...);
 }
@ -358,7 +358,7 @@ struct from_json_fn
        return from_json(j, val);
    }
 };
-}
+}  // namespace detail
 /// namespace to hold default `from_json` function
 /// to see why this is required:
@ -366,5 +366,5 @@ struct from_json_fn
 namespace
 {
 constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value;
-}
+} // namespace
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/conversions/to_chars.hpp
+++ b/include/nlohmann/detail/conversions/to_chars.hpp
@ -47,10 +47,9 @@ struct diyfp // f * 2^e
 {
    static constexpr int kPrecision = 64; // = q
-    uint64_t f;
+    uint64_t f = 0;
-    int e;
+    int e = 0;
    constexpr diyfp() noexcept : f(0), e(0) {}
    constexpr diyfp(uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
    /*!
@ -62,7 +61,7 @@ struct diyfp // f * 2^e
        assert(x.e == y.e);
        assert(x.f >= y.f);
-        return diyfp(x.f - y.f, x.e);
+        return {x.f - y.f, x.e};
    }
    /*!
@ -127,7 +126,7 @@ struct diyfp // f * 2^e
        const uint64_t h = p3 + p2_hi + p1_hi + (Q >> 32);
-        return diyfp(h, x.e + y.e + 64);
+        return {h, x.e + y.e + 64};
    }
    /*!
@ -158,7 +157,7 @@ struct diyfp // f * 2^e
        assert(delta >= 0);
        assert(((x.f << delta) >> delta) == x.f);
-        return diyfp(x.f << delta, target_exponent);
+        return {x.f << delta, target_exponent};
    }
 };
@ -461,7 +460,7 @@ inline cached_power get_cached_power_for_binary_exponent(int e)
    assert(e >= -1500);
    assert(e <=  1500);
    const int f = kAlpha - e - 1;
-    const int k = (f * 78913) / (1 << 18) + (f > 0);
+    const int k = (f * 78913) / (1 << 18) + static_cast<int>(f > 0);
    const int index = (-kCachedPowersMinDecExp + k + (kCachedPowersDecStep - 1)) / kCachedPowersDecStep;
    assert(index >= 0);
@ -609,7 +608,7 @@ inline void grisu2_digit_gen(char* buffer, int& length, int& decimal_exponent,
    const diyfp one(uint64_t{1} << -M_plus.e, M_plus.e);
-    uint32_t p1 = static_cast<uint32_t>(M_plus.f >> -one.e); // p1 = f div 2^-e (Since -e >= 32, p1 fits into a 32-bit int.)
+    auto p1 = static_cast<uint32_t>(M_plus.f >> -one.e); // p1 = f div 2^-e (Since -e >= 32, p1 fits into a 32-bit int.)
    uint64_t p2 = M_plus.f & (one.f - 1);                    // p2 = f mod 2^-e
    // 1)
@ -928,7 +927,7 @@ inline char* append_exponent(char* buf, int e)
        *buf++ = '+';
    }
-    uint32_t k = static_cast<uint32_t>(e);
+    auto k = static_cast<uint32_t>(e);
    if (k < 10)
    {
        // Always print at least two digits in the exponent.
@ -1046,7 +1045,7 @@ format. Returns an iterator pointing past-the-end of the decimal representation.
@note The result is NOT null-terminated.
 */
 template <typename FloatType>
-char* to_chars(char* first, char* last, FloatType value)
+char* to_chars(char* first, const char* last, FloatType value)
 {
    static_cast<void>(last); // maybe unused - fix warning
    assert(std::isfinite(value));
--- a/include/nlohmann/detail/conversions/to_json.hpp
+++ b/include/nlohmann/detail/conversions/to_json.hpp
@ -306,13 +306,13 @@ void to_json(BasicJsonType& j, const std::pair<Args...>& p)
 // 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
+void to_json(BasicJsonType& j, const T& b)
 {
    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...>)
+void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...> /*unused*/)
 {
    j = {std::get<Idx>(t)...};
 }
@ -332,11 +332,11 @@ struct to_json_fn
        return to_json(j, std::forward<T>(val));
    }
 };
-}
+}  // namespace detail
 /// namespace to hold default `to_json` function
 namespace
 {
 constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
-}
+} // namespace
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/exceptions.hpp
+++ b/include/nlohmann/detail/exceptions.hpp
@ -4,6 +4,8 @@
 #include <stdexcept> // runtime_error
 #include <string> // to_string
 #include <nlohmann/detail/input/position_t.hpp>
 namespace nlohmann
 {
 namespace detail
@ -115,15 +117,23 @@ class parse_error : public exception
    /*!
    @brief create a parse error exception
    @param[in] id_       the id of the exception
-    @param[in] byte_     the byte index where the error occurred (or 0 if the
+    @param[in] position  the position where the error occurred (or with
-                         position cannot be determined)
+                         chars_read_total=0 if the position cannot be
                         determined)
    @param[in] what_arg  the explanatory string
    @return parse_error object
    */
    static parse_error create(int id_, const position_t& pos, const std::string& what_arg)
    {
        std::string w = exception::name("parse_error", id_) + "parse error" +
                        position_string(pos) + ": " + what_arg;
        return parse_error(id_, pos.chars_read_total, w.c_str());
    }
    static parse_error create(int id_, std::size_t byte_, const std::string& what_arg)
    {
        std::string w = exception::name("parse_error", id_) + "parse error" +
-                        (byte_ != 0 ? (" at " + std::to_string(byte_)) : "") +
+                        (byte_ != 0 ? (" at byte " + std::to_string(byte_)) : "") +
                        ": " + what_arg;
        return parse_error(id_, byte_, w.c_str());
    }
@ -142,6 +152,12 @@ class parse_error : public exception
  private:
    parse_error(int id_, std::size_t byte_, const char* what_arg)
        : exception(id_, what_arg), byte(byte_) {}
    static std::string position_string(const position_t& pos)
    {
        return " at line " + std::to_string(pos.lines_read + 1) +
               ", column " + std::to_string(pos.chars_read_current_line);
    }
 };
 /*!
@ -329,5 +345,5 @@ class other_error : public exception
  private:
    other_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/input/binary_reader.hpp
+++ b/include/nlohmann/detail/input/binary_reader.hpp
@ -104,7 +104,8 @@ class binary_reader
            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 sax->parse_error(chars_read, get_token_string(),
                                        parse_error::create(110, chars_read, exception_message(format, "expected end of input; last byte: 0x" + get_token_string(), "value")));
            }
        }
@ -139,7 +140,7 @@ class binary_reader
        while (true)
        {
            get();
-            if (JSON_UNLIKELY(not unexpect_eof()))
+            if (JSON_UNLIKELY(not unexpect_eof(input_format_t::bson, "cstring")))
            {
                return false;
            }
@ -165,7 +166,7 @@ class binary_reader
    template <typename NumberType>
    bool get_bson_string(const NumberType len, string_t& result)
    {
-        return get_string(len - static_cast<NumberType>(1), result)
+        return get_string(input_format_t::bson, len - static_cast<NumberType>(1), result)
               && get() != std::char_traits<char>::eof();
    }
@ -195,14 +196,14 @@ class binary_reader
            case 0x01: // double
            {
                double number;
-                return get_number<double, true>(number)
+                return get_number<double, true>(input_format_t::bson, number)
                       && sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 0x02: // string
            {
                std::int32_t len;
                string_t value;
-                return get_number<std::int32_t, true>(len)
+                return get_number<std::int32_t, true>(input_format_t::bson, len)
                       && get_bson_string(len, value)
                       && sax->string(value);
            }
@ -213,13 +214,13 @@ class binary_reader
            case 0x10: // int32
            {
                std::int32_t value;
-                return get_number<std::int32_t, true>(value)
+                return get_number<std::int32_t, true>(input_format_t::bson, value)
                       && sax->number_integer(static_cast<std::int32_t>(value));
            }
            case 0x12: // int64
            {
                std::int64_t value;
-                return get_number<std::int64_t, true>(value)
+                return get_number<std::int64_t, true>(input_format_t::bson, value)
                       && sax->number_integer(static_cast<std::int64_t>(value));
            }
            case 0x0A: // null
@ -256,7 +257,7 @@ class binary_reader
    {
        while (auto element_type = get())
        {
-            if (JSON_UNLIKELY(not unexpect_eof()))
+            if (JSON_UNLIKELY(not unexpect_eof(input_format_t::bson, "element list")))
            {
                return false;
            }
@ -288,7 +289,7 @@ class binary_reader
    bool parse_bson_array()
    {
        std::int32_t documentSize;
-        get_number<std::int32_t, true>(documentSize);
+        get_number<std::int32_t, true>(input_format_t::bson, documentSize);
        if (JSON_UNLIKELY(not sax->start_array(-1)))
        {
@ -310,7 +311,7 @@ class binary_reader
    bool parse_bson_internal()
    {
        std::int32_t documentSize;
-        get_number<std::int32_t, true>(documentSize);
+        get_number<std::int32_t, true>(input_format_t::bson, documentSize);
        if (JSON_UNLIKELY(not sax->start_object(-1)))
        {
@ -338,7 +339,7 @@ class binary_reader
        {
            // EOF
            case std::char_traits<char>::eof():
-                return unexpect_eof();
+                return unexpect_eof(input_format_t::cbor, "value");
            // Integer 0x00..0x17 (0..23)
            case 0x00:
@ -370,25 +371,25 @@ class binary_reader
            case 0x18: // Unsigned integer (one-byte uint8_t follows)
            {
                uint8_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
            }
            case 0x19: // Unsigned integer (two-byte uint16_t follows)
            {
                uint16_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
            }
            case 0x1A: // Unsigned integer (four-byte uint32_t follows)
            {
                uint32_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
            }
            case 0x1B: // Unsigned integer (eight-byte uint64_t follows)
            {
                uint64_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
            }
            // Negative integer -1-0x00..-1-0x17 (-1..-24)
@ -421,25 +422,25 @@ class binary_reader
            case 0x38: // Negative integer (one-byte uint8_t follows)
            {
                uint8_t number;
-                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
+                return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
            }
            case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
            {
                uint16_t number;
-                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
+                return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
            }
            case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
            {
                uint32_t number;
-                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
+                return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
            }
            case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
            {
                uint64_t number;
-                return get_number(number) and sax->number_integer(static_cast<number_integer_t>(-1)
+                return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1)
                        - static_cast<number_integer_t>(number));
            }
@ -508,25 +509,25 @@ class binary_reader
            case 0x98: // array (one-byte uint8_t for n follows)
            {
                uint8_t len;
-                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
            }
            case 0x99: // array (two-byte uint16_t for n follow)
            {
                uint16_t len;
-                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
            }
            case 0x9A: // array (four-byte uint32_t for n follow)
            {
                uint32_t len;
-                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
            }
            case 0x9B: // array (eight-byte uint64_t for n follow)
            {
                uint64_t len;
-                return get_number(len) and get_cbor_array(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
            }
            case 0x9F: // array (indefinite length)
@ -562,25 +563,25 @@ class binary_reader
            case 0xB8: // map (one-byte uint8_t for n follows)
            {
                uint8_t len;
-                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
            }
            case 0xB9: // map (two-byte uint16_t for n follow)
            {
                uint16_t len;
-                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
            }
            case 0xBA: // map (four-byte uint32_t for n follow)
            {
                uint32_t len;
-                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
            }
            case 0xBB: // map (eight-byte uint64_t for n follow)
            {
                uint64_t len;
-                return get_number(len) and get_cbor_object(static_cast<std::size_t>(len));
+                return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
            }
            case 0xBF: // map (indefinite length)
@ -597,17 +598,20 @@ class binary_reader
            case 0xF9: // Half-Precision Float (two-byte IEEE 754)
            {
-                const int byte1 = get();
+                const int byte1_raw = get();
-                if (JSON_UNLIKELY(not unexpect_eof()))
+                if (JSON_UNLIKELY(not unexpect_eof(input_format_t::cbor, "number")))
                {
                    return false;
                }
-                const int byte2 = get();
+                const int byte2_raw = get();
-                if (JSON_UNLIKELY(not unexpect_eof()))
+                if (JSON_UNLIKELY(not unexpect_eof(input_format_t::cbor, "number")))
                {
                    return false;
                }
                const auto byte1 = static_cast<unsigned char>(byte1_raw);
                const auto byte2 = static_cast<unsigned char>(byte2_raw);
                // code from RFC 7049, Appendix D, Figure 3:
                // As half-precision floating-point numbers were only added
                // to IEEE 754 in 2008, today's programming platforms often
@ -643,19 +647,19 @@ class binary_reader
            case 0xFA: // Single-Precision Float (four-byte IEEE 754)
            {
                float number;
-                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+                return get_number(input_format_t::cbor, number) and sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 0xFB: // Double-Precision Float (eight-byte IEEE 754)
            {
                double number;
-                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+                return get_number(input_format_t::cbor, number) and sax->number_float(static_cast<number_float_t>(number), "");
            }
            default: // anything else (0xFF is handled inside the other types)
            {
                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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::cbor, "invalid byte: 0x" + last_token, "value")));
            }
        }
    }
@ -669,7 +673,7 @@ class binary_reader
        {
            // EOF
            case std::char_traits<char>::eof():
-                return unexpect_eof();
+                return unexpect_eof(input_format_t::msgpack, "value");
            // positive fixint
            case 0x00:
@ -890,61 +894,61 @@ class binary_reader
            case 0xCA: // float 32
            {
                float number;
-                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+                return get_number(input_format_t::msgpack, number) and sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 0xCB: // float 64
            {
                double number;
-                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+                return get_number(input_format_t::msgpack, number) and sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 0xCC: // uint 8
            {
                uint8_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
            }
            case 0xCD: // uint 16
            {
                uint16_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
            }
            case 0xCE: // uint 32
            {
                uint32_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
            }
            case 0xCF: // uint 64
            {
                uint64_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
            }
            case 0xD0: // int 8
            {
                int8_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
            }
            case 0xD1: // int 16
            {
                int16_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
            }
            case 0xD2: // int 32
            {
                int32_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
            }
            case 0xD3: // int 64
            {
                int64_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
            }
            case 0xD9: // str 8
@ -958,25 +962,25 @@ class binary_reader
            case 0xDC: // array 16
            {
                uint16_t len;
-                return get_number(len) and get_msgpack_array(static_cast<std::size_t>(len));
+                return get_number(input_format_t::msgpack, len) and get_msgpack_array(static_cast<std::size_t>(len));
            }
            case 0xDD: // array 32
            {
                uint32_t len;
-                return get_number(len) and get_msgpack_array(static_cast<std::size_t>(len));
+                return get_number(input_format_t::msgpack, len) and get_msgpack_array(static_cast<std::size_t>(len));
            }
            case 0xDE: // map 16
            {
                uint16_t len;
-                return get_number(len) and get_msgpack_object(static_cast<std::size_t>(len));
+                return get_number(input_format_t::msgpack, len) and get_msgpack_object(static_cast<std::size_t>(len));
            }
            case 0xDF: // map 32
            {
                uint32_t len;
-                return get_number(len) and get_msgpack_object(static_cast<std::size_t>(len));
+                return get_number(input_format_t::msgpack, len) and get_msgpack_object(static_cast<std::size_t>(len));
            }
            // negative fixint
@ -1017,7 +1021,7 @@ class binary_reader
            default: // anything else
            {
                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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::msgpack, "invalid byte: 0x" + last_token, "value")));
            }
        }
    }
@ -1067,6 +1071,7 @@ class binary_reader
    @brief read a number from the input
    @tparam NumberType the type of the number
    @param[in] format   the current format (for diagnostics)
    @param[out] result  number of type @a NumberType
    @return whether conversion completed
@ -1076,14 +1081,14 @@ class binary_reader
          (big endian) and therefore need reordering on little endian systems.
    */
    template<typename NumberType, bool InputIsLittleEndian = false>
-    bool get_number(NumberType& result)
+    bool get_number(const input_format_t format, 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();
-            if (JSON_UNLIKELY(not unexpect_eof()))
+            if (JSON_UNLIKELY(not unexpect_eof(format, "number")))
            {
                return false;
            }
@ -1109,8 +1114,9 @@ class binary_reader
    @brief create a string by reading characters from the input
    @tparam NumberType the type of the number
    @param[in] format the current format (for diagnostics)
    @param[in] len number of characters to read
-    @param[out] string created by reading @a len bytes
+    @param[out] result string created by reading @a len bytes
    @return whether string creation completed
@ -1119,13 +1125,13 @@ class binary_reader
          the input before we run out of string memory.
    */
    template<typename NumberType>
-    bool get_string(const NumberType len, string_t& result)
+    bool get_string(const input_format_t format, const NumberType len, string_t& result)
    {
        bool success = true;
-        std::generate_n(std::back_inserter(result), len, [this, &success]()
+        std::generate_n(std::back_inserter(result), len, [this, &success, &format]()
        {
            get();
-            if (JSON_UNLIKELY(not unexpect_eof()))
+            if (JSON_UNLIKELY(not unexpect_eof(format, "string")))
            {
                success = false;
            }
@ -1147,7 +1153,7 @@ class binary_reader
    */
    bool get_cbor_string(string_t& result)
    {
-        if (JSON_UNLIKELY(not unexpect_eof()))
+        if (JSON_UNLIKELY(not unexpect_eof(input_format_t::cbor, "string")))
        {
            return false;
        }
@ -1180,31 +1186,31 @@ class binary_reader
            case 0x76:
            case 0x77:
            {
-                return get_string(current & 0x1F, result);
+                return get_string(input_format_t::cbor, current & 0x1F, result);
            }
            case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
            {
                uint8_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
            }
            case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
            {
                uint16_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
            }
            case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
            {
                uint32_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
            }
            case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
            {
                uint64_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
            }
            case 0x7F: // UTF-8 string (indefinite length)
@ -1224,7 +1230,7 @@ class binary_reader
            default:
            {
                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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::cbor, "expected length specification (0x60-0x7B) or indefinite string type (0x7F); last byte: 0x" + last_token, "string")));
            }
        }
    }
@ -1242,6 +1248,7 @@ class binary_reader
        }
        if (len != std::size_t(-1))
        {
            for (std::size_t i = 0; i < len; ++i)
            {
                if (JSON_UNLIKELY(not parse_cbor_internal()))
@ -1249,6 +1256,7 @@ class binary_reader
                    return false;
                }
            }
        }
        else
        {
            while (get() != 0xFF)
@ -1325,7 +1333,7 @@ class binary_reader
    */
    bool get_msgpack_string(string_t& result)
    {
-        if (JSON_UNLIKELY(not unexpect_eof()))
+        if (JSON_UNLIKELY(not unexpect_eof(input_format_t::msgpack, "string")))
        {
            return false;
        }
@ -1366,31 +1374,31 @@ class binary_reader
            case 0xBE:
            case 0xBF:
            {
-                return get_string(current & 0x1F, result);
+                return get_string(input_format_t::msgpack, current & 0x1F, result);
            }
            case 0xD9: // str 8
            {
                uint8_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::msgpack, len) and get_string(input_format_t::msgpack, len, result);
            }
            case 0xDA: // str 16
            {
                uint16_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::msgpack, len) and get_string(input_format_t::msgpack, len, result);
            }
            case 0xDB: // str 32
            {
                uint32_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::msgpack, len) and get_string(input_format_t::msgpack, len, result);
            }
            default:
            {
                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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::msgpack, "expected length specification (0xA0-0xBF, 0xD9-0xDB); last byte: 0x" + last_token, "string")));
            }
        }
    }
@ -1468,7 +1476,7 @@ class binary_reader
            get();  // TODO: may we ignore N here?
        }
-        if (JSON_UNLIKELY(not unexpect_eof()))
+        if (JSON_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "value")))
        {
            return false;
        }
@ -1478,36 +1486,36 @@ class binary_reader
            case 'U':
            {
                uint8_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
            }
            case 'i':
            {
                int8_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
            }
            case 'I':
            {
                int16_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
            }
            case 'l':
            {
                int32_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
            }
            case 'L':
            {
                int64_t len;
-                return get_number(len) and get_string(len, result);
+                return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
            }
            default:
                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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "expected length type specification (U, i, I, l, L); last byte: 0x" + last_token, "string")));
        }
    }
@ -1522,7 +1530,7 @@ class binary_reader
            case 'U':
            {
                uint8_t number;
-                if (JSON_UNLIKELY(not get_number(number)))
+                if (JSON_UNLIKELY(not get_number(input_format_t::ubjson, number)))
                {
                    return false;
                }
@ -1533,7 +1541,7 @@ class binary_reader
            case 'i':
            {
                int8_t number;
-                if (JSON_UNLIKELY(not get_number(number)))
+                if (JSON_UNLIKELY(not get_number(input_format_t::ubjson, number)))
                {
                    return false;
                }
@ -1544,7 +1552,7 @@ class binary_reader
            case 'I':
            {
                int16_t number;
-                if (JSON_UNLIKELY(not get_number(number)))
+                if (JSON_UNLIKELY(not get_number(input_format_t::ubjson, number)))
                {
                    return false;
                }
@ -1555,7 +1563,7 @@ class binary_reader
            case 'l':
            {
                int32_t number;
-                if (JSON_UNLIKELY(not get_number(number)))
+                if (JSON_UNLIKELY(not get_number(input_format_t::ubjson, number)))
                {
                    return false;
                }
@ -1566,7 +1574,7 @@ class binary_reader
            case 'L':
            {
                int64_t number;
-                if (JSON_UNLIKELY(not get_number(number)))
+                if (JSON_UNLIKELY(not get_number(input_format_t::ubjson, number)))
                {
                    return false;
                }
@ -1577,7 +1585,7 @@ class binary_reader
            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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "expected length type specification (U, i, I, l, L) after '#'; last byte: 0x" + last_token, "size")));
            }
        }
    }
@ -1602,7 +1610,7 @@ class binary_reader
        if (current == '$')
        {
            result.second = get();  // must not ignore 'N', because 'N' maybe the type
-            if (JSON_UNLIKELY(not unexpect_eof()))
+            if (JSON_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "type")))
            {
                return false;
            }
@ -1610,12 +1618,12 @@ class binary_reader
            get_ignore_noop();
            if (JSON_UNLIKELY(current != '#'))
            {
-                if (JSON_UNLIKELY(not unexpect_eof()))
+                if (JSON_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "value")))
                {
                    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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::ubjson, "expected '#' after type information; last byte: 0x" + last_token, "size")));
            }
            return get_ubjson_size_value(result.first);
@ -1636,7 +1644,7 @@ class binary_reader
        switch (prefix)
        {
            case std::char_traits<char>::eof():  // EOF
-                return unexpect_eof();
+                return unexpect_eof(input_format_t::ubjson, "value");
            case 'T':  // true
                return sax->boolean(true);
@ -1649,56 +1657,56 @@ class binary_reader
            case 'U':
            {
                uint8_t number;
-                return get_number(number) and sax->number_unsigned(number);
+                return get_number(input_format_t::ubjson, number) and sax->number_unsigned(number);
            }
            case 'i':
            {
                int8_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
            }
            case 'I':
            {
                int16_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
            }
            case 'l':
            {
                int32_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
            }
            case 'L':
            {
                int64_t number;
-                return get_number(number) and sax->number_integer(number);
+                return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
            }
            case 'd':
            {
                float number;
-                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+                return get_number(input_format_t::ubjson, number) and sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 'D':
            {
                double number;
-                return get_number(number) and sax->number_float(static_cast<number_float_t>(number), "");
+                return get_number(input_format_t::ubjson, number) and sax->number_float(static_cast<number_float_t>(number), "");
            }
            case 'C':  // char
            {
                get();
-                if (JSON_UNLIKELY(not unexpect_eof()))
+                if (JSON_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "char")))
                {
                    return false;
                }
                if (JSON_UNLIKELY(current > 127))
                {
                    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 sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + last_token, "char")));
                }
                string_t s(1, static_cast<char>(current));
                return sax->string(s);
@ -1719,7 +1727,7 @@ class binary_reader
            default: // anything else
            {
                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));
+                return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::ubjson, "invalid byte: 0x" + last_token, "value")));
            }
        }
    }
@ -1862,13 +1870,16 @@ class binary_reader
    }
    /*!
    @param[in] format   the current format (for diagnostics)
    @param[in] context  further context information (for diagnostics)
    @return whether the last read character is not EOF
    */
-    bool unexpect_eof() const
+    bool unexpect_eof(const input_format_t format, const char* context) const
    {
        if (JSON_UNLIKELY(current == std::char_traits<char>::eof()))
        {
-            return sax->parse_error(chars_read, "<end of file>", 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, exception_message(format, "unexpected end of input", context)));
        }
        return true;
    }
@ -1884,6 +1895,45 @@ class binary_reader
    }
  private:
    /*!
    @param[in] format   the current format
    @param[in] detail   a detailed error message
    @param[in] context  further contect information
    @return a message string to use in the parse_error exceptions
    */
    std::string exception_message(const input_format_t format,
                                  const std::string& detail,
                                  const std::string& context) const
    {
        std::string error_msg = "syntax error while parsing ";
        switch (format)
        {
            case input_format_t::cbor:
                error_msg += "CBOR";
                break;
            case input_format_t::msgpack:
                error_msg += "MessagePack";
                break;
            case input_format_t::ubjson:
                error_msg += "UBJSON";
                break;
            case input_format_t::bson:
                error_msg += "BSON";
                break;
            // LCOV_EXCL_START
            default:
                assert(false);
                // LCOV_EXCL_STOP
        }
        return error_msg + " " + context + ": " + detail;
    }
    /// input adapter
    input_adapter_t ia = nullptr;
@ -1899,5 +1949,5 @@ class binary_reader
    /// the SAX parser
    json_sax_t* sax = nullptr;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/input/input_adapters.hpp
+++ b/include/nlohmann/detail/input/input_adapters.hpp
@ -71,6 +71,8 @@ class input_stream_adapter : public input_adapter_protocol
    // delete because of pointer members
    input_stream_adapter(const input_stream_adapter&) = delete;
    input_stream_adapter& operator=(input_stream_adapter&) = delete;
    input_stream_adapter(input_stream_adapter&&) = delete;
    input_stream_adapter& operator=(input_stream_adapter&&) = delete;
    // std::istream/std::streambuf use std::char_traits<char>::to_int_type, to
    // ensure that std::char_traits<char>::eof() and the character 0xFF do not
@ -97,6 +99,9 @@ class input_buffer_adapter : public input_adapter_protocol
    // delete because of pointer members
    input_buffer_adapter(const input_buffer_adapter&) = delete;
    input_buffer_adapter& operator=(input_buffer_adapter&) = delete;
    input_buffer_adapter(input_buffer_adapter&&) = delete;
    input_buffer_adapter& operator=(input_buffer_adapter&&) = delete;
    ~input_buffer_adapter() override = default;
    std::char_traits<char>::int_type get_character() noexcept override
    {
@ -115,38 +120,11 @@ class input_buffer_adapter : public input_adapter_protocol
    const char* const limit;
 };
-template<typename WideStringType>
+template<typename WideStringType, size_t T>
-class wide_string_input_adapter : public input_adapter_protocol
+struct wide_string_input_helper
 {
-  public:
+    // UTF-32
-    explicit wide_string_input_adapter(const WideStringType& w) : str(w) {}
+    static void fill_buffer(const WideStringType& str, size_t& current_wchar, std::array<std::char_traits<char>::int_type, 4>& utf8_bytes, size_t& utf8_bytes_index, size_t& utf8_bytes_filled)
    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;
@ -158,7 +136,62 @@ class wide_string_input_adapter : public input_adapter_protocol
        else
        {
            // get the current character
-            const int wc = static_cast<int>(str[current_wchar++]);
+            const auto 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;
            }
        }
    }
 };
 template<typename WideStringType>
 struct wide_string_input_helper<WideStringType, 2>
 {
    // UTF-16
    static void fill_buffer(const WideStringType& str, size_t& current_wchar, std::array<std::char_traits<char>::int_type, 4>& utf8_bytes, size_t& utf8_bytes_index, size_t& utf8_bytes_filled)
    {
        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 auto wc = static_cast<int>(str[current_wchar++]);
            // UTF-16 to UTF-8 encoding
            if (wc < 0x80)
@ -183,7 +216,7 @@ class wide_string_input_adapter : public input_adapter_protocol
            {
                if (current_wchar < str.size())
                {
-                    const int wc2 = static_cast<int>(str[current_wchar++]);
+                    const auto 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);
@ -201,58 +234,38 @@ class wide_string_input_adapter : public input_adapter_protocol
            }
        }
    }
 };
-    void fill_buffer_utf32()
+template<typename WideStringType>
-    {
+class wide_string_input_adapter : public input_adapter_protocol
-        utf8_bytes_index = 0;
+{
  public:
    explicit wide_string_input_adapter(const WideStringType& w) : str(w) {}
-        if (current_wchar == str.size())
+    std::char_traits<char>::int_type get_character() noexcept override
    {
-            utf8_bytes[0] = std::char_traits<char>::eof();
+        // check if buffer needs to be filled
-            utf8_bytes_filled = 1;
+        if (utf8_bytes_index == utf8_bytes_filled)
        }
        else
        {
-            // get the current character
+            fill_buffer<sizeof(typename WideStringType::value_type)>();
            const int wc = static_cast<int>(str[current_wchar++]);
-            // UTF-32 to UTF-8 encoding
+            assert(utf8_bytes_filled > 0);
-            if (wc < 0x80)
+            assert(utf8_bytes_index == 0);
            {
                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;
            }
        }
        // use buffer
        assert(utf8_bytes_filled > 0);
        assert(utf8_bytes_index < utf8_bytes_filled);
        return utf8_bytes[utf8_bytes_index++];
    }
  private:
    template<size_t T>
    void fill_buffer()
    {
        wide_string_input_helper<WideStringType, T>::fill_buffer(str, current_wchar, utf8_bytes, utf8_bytes_index, utf8_bytes_filled);
    }
    /// the wstring to process
    const WideStringType& str;
@ -373,5 +386,5 @@ class input_adapter
    /// the actual adapter
    input_adapter_t ia = nullptr;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/input/json_sax.hpp
+++ b/include/nlohmann/detail/input/json_sax.hpp
@ -113,7 +113,7 @@ struct json_sax
    @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
+    @param[in] ex          an exception object describing the error
    @return whether parsing should proceed (must return false)
    */
    virtual bool parse_error(std::size_t position,
@ -181,7 +181,7 @@ class json_sax_dom_parser
        return true;
    }
-    bool number_float(number_float_t val, const string_t&)
+    bool number_float(number_float_t val, const string_t& /*unused*/)
    {
        handle_value(val);
        return true;
@ -238,7 +238,7 @@ class json_sax_dom_parser
        return true;
    }
-    bool parse_error(std::size_t, const std::string&,
+    bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/,
                     const detail::exception& ex)
    {
        errored = true;
@ -286,9 +286,9 @@ class json_sax_dom_parser
            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));
@ -301,7 +301,6 @@ class json_sax_dom_parser
            return object_element;
        }
    }
    }
    /// the parsed JSON value
    BasicJsonType& root;
@ -358,7 +357,7 @@ class json_sax_dom_callback_parser
        return true;
    }
-    bool number_float(number_float_t val, const string_t&)
+    bool number_float(number_float_t val, const string_t& /*unused*/)
    {
        handle_value(val);
        return true;
@ -496,7 +495,7 @@ class json_sax_dom_callback_parser
        return true;
    }
-    bool parse_error(std::size_t, const std::string&,
+    bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/,
                     const detail::exception& ex)
    {
        errored = true;
@ -574,8 +573,7 @@ class json_sax_dom_callback_parser
            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())
@ -583,7 +581,9 @@ class json_sax_dom_callback_parser
            return {false, nullptr};
        }
        // we now only expect arrays and objects
        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));
@ -606,7 +606,6 @@ class json_sax_dom_callback_parser
            return {true, object_element};
        }
    }
    }
    /// the parsed JSON value
    BasicJsonType& root;
@ -642,37 +641,37 @@ class json_sax_acceptor
        return true;
    }
-    bool boolean(bool)
+    bool boolean(bool /*unused*/)
    {
        return true;
    }
-    bool number_integer(number_integer_t)
+    bool number_integer(number_integer_t /*unused*/)
    {
        return true;
    }
-    bool number_unsigned(number_unsigned_t)
+    bool number_unsigned(number_unsigned_t /*unused*/)
    {
        return true;
    }
-    bool number_float(number_float_t, const string_t&)
+    bool number_float(number_float_t /*unused*/, const string_t& /*unused*/)
    {
        return true;
    }
-    bool string(string_t&)
+    bool string(string_t& /*unused*/)
    {
        return true;
    }
-    bool start_object(std::size_t = std::size_t(-1))
+    bool start_object(std::size_t  /*unused*/ = std::size_t(-1))
    {
        return true;
    }
-    bool key(string_t&)
+    bool key(string_t& /*unused*/)
    {
        return true;
    }
@ -682,7 +681,7 @@ class json_sax_acceptor
        return true;
    }
-    bool start_array(std::size_t = std::size_t(-1))
+    bool start_array(std::size_t  /*unused*/ = std::size_t(-1))
    {
        return true;
    }
@ -692,11 +691,11 @@ class json_sax_acceptor
        return true;
    }
-    bool parse_error(std::size_t, const std::string&, const detail::exception&)
+    bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/, const detail::exception& /*unused*/)
    {
        return false;
    }
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/input/lexer.hpp
+++ b/include/nlohmann/detail/input/lexer.hpp
@ -10,6 +10,7 @@
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
 #include <nlohmann/detail/input/position_t.hpp>
 namespace nlohmann
 {
@ -104,7 +105,10 @@ class lexer
    // delete because of pointer members
    lexer(const lexer&) = delete;
    lexer(lexer&&) = delete;
    lexer& operator=(lexer&) = delete;
    lexer& operator=(lexer&&) = delete;
    ~lexer() = default;
  private:
    /////////////////////
@ -393,39 +397,194 @@ class lexer
                // invalid control characters
                case 0x00:
                {
                    error_message = "invalid string: control character U+0000 (NUL) must be escaped to \\u0000";
                    return token_type::parse_error;
                }
                case 0x01:
                {
                    error_message = "invalid string: control character U+0001 (SOH) must be escaped to \\u0001";
                    return token_type::parse_error;
                }
                case 0x02:
                {
                    error_message = "invalid string: control character U+0002 (STX) must be escaped to \\u0002";
                    return token_type::parse_error;
                }
                case 0x03:
                {
                    error_message = "invalid string: control character U+0003 (ETX) must be escaped to \\u0003";
                    return token_type::parse_error;
                }
                case 0x04:
                {
                    error_message = "invalid string: control character U+0004 (EOT) must be escaped to \\u0004";
                    return token_type::parse_error;
                }
                case 0x05:
                {
                    error_message = "invalid string: control character U+0005 (ENQ) must be escaped to \\u0005";
                    return token_type::parse_error;
                }
                case 0x06:
                {
                    error_message = "invalid string: control character U+0006 (ACK) must be escaped to \\u0006";
                    return token_type::parse_error;
                }
                case 0x07:
                {
                    error_message = "invalid string: control character U+0007 (BEL) must be escaped to \\u0007";
                    return token_type::parse_error;
                }
                case 0x08:
                {
                    error_message = "invalid string: control character U+0008 (BS) must be escaped to \\u0008 or \\b";
                    return token_type::parse_error;
                }
                case 0x09:
                {
                    error_message = "invalid string: control character U+0009 (HT) must be escaped to \\u0009 or \\t";
                    return token_type::parse_error;
                }
                case 0x0A:
                {
                    error_message = "invalid string: control character U+000A (LF) must be escaped to \\u000A or \\n";
                    return token_type::parse_error;
                }
                case 0x0B:
                {
                    error_message = "invalid string: control character U+000B (VT) must be escaped to \\u000B";
                    return token_type::parse_error;
                }
                case 0x0C:
                {
                    error_message = "invalid string: control character U+000C (FF) must be escaped to \\u000C or \\f";
                    return token_type::parse_error;
                }
                case 0x0D:
                {
                    error_message = "invalid string: control character U+000D (CR) must be escaped to \\u000D or \\r";
                    return token_type::parse_error;
                }
                case 0x0E:
                {
                    error_message = "invalid string: control character U+000E (SO) must be escaped to \\u000E";
                    return token_type::parse_error;
                }
                case 0x0F:
                {
                    error_message = "invalid string: control character U+000F (SI) must be escaped to \\u000F";
                    return token_type::parse_error;
                }
                case 0x10:
                {
                    error_message = "invalid string: control character U+0010 (DLE) must be escaped to \\u0010";
                    return token_type::parse_error;
                }
                case 0x11:
                {
                    error_message = "invalid string: control character U+0011 (DC1) must be escaped to \\u0011";
                    return token_type::parse_error;
                }
                case 0x12:
                {
                    error_message = "invalid string: control character U+0012 (DC2) must be escaped to \\u0012";
                    return token_type::parse_error;
                }
                case 0x13:
                {
                    error_message = "invalid string: control character U+0013 (DC3) must be escaped to \\u0013";
                    return token_type::parse_error;
                }
                case 0x14:
                {
                    error_message = "invalid string: control character U+0014 (DC4) must be escaped to \\u0014";
                    return token_type::parse_error;
                }
                case 0x15:
                {
                    error_message = "invalid string: control character U+0015 (NAK) must be escaped to \\u0015";
                    return token_type::parse_error;
                }
                case 0x16:
                {
                    error_message = "invalid string: control character U+0016 (SYN) must be escaped to \\u0016";
                    return token_type::parse_error;
                }
                case 0x17:
                {
                    error_message = "invalid string: control character U+0017 (ETB) must be escaped to \\u0017";
                    return token_type::parse_error;
                }
                case 0x18:
                {
                    error_message = "invalid string: control character U+0018 (CAN) must be escaped to \\u0018";
                    return token_type::parse_error;
                }
                case 0x19:
                {
                    error_message = "invalid string: control character U+0019 (EM) must be escaped to \\u0019";
                    return token_type::parse_error;
                }
                case 0x1A:
                {
                    error_message = "invalid string: control character U+001A (SUB) must be escaped to \\u001A";
                    return token_type::parse_error;
                }
                case 0x1B:
                {
                    error_message = "invalid string: control character U+001B (ESC) must be escaped to \\u001B";
                    return token_type::parse_error;
                }
                case 0x1C:
                {
                    error_message = "invalid string: control character U+001C (FS) must be escaped to \\u001C";
                    return token_type::parse_error;
                }
                case 0x1D:
                {
                    error_message = "invalid string: control character U+001D (GS) must be escaped to \\u001D";
                    return token_type::parse_error;
                }
                case 0x1E:
                {
                    error_message = "invalid string: control character U+001E (RS) must be escaped to \\u001E";
                    return token_type::parse_error;
                }
                case 0x1F:
                {
-                    error_message = "invalid string: control character must be escaped";
+                    error_message = "invalid string: control character U+001F (US) must be escaped to \\u001F";
                    return token_type::parse_error;
                }
@ -709,7 +868,7 @@ class lexer
          locale's decimal point is used instead of `.` to work with the
          locale-dependent converters.
    */
-    token_type scan_number()
+    token_type scan_number()  // lgtm [cpp/use-of-goto]
    {
        // reset token_buffer to store the number's bytes
        reset();
@ -1082,7 +1241,9 @@ scan_number_done:
    */
    std::char_traits<char>::int_type get()
    {
-        ++chars_read;
+        ++position.chars_read_total;
        ++position.chars_read_current_line;
        if (next_unget)
        {
            // just reset the next_unget variable and work with current
@ -1097,6 +1258,13 @@ scan_number_done:
        {
            token_string.push_back(std::char_traits<char>::to_char_type(current));
        }
        if (current == '\n')
        {
            ++position.lines_read;
            ++position.chars_read_current_line = 0;
        }
        return current;
    }
@ -1104,14 +1272,29 @@ scan_number_done:
    @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
+    changed - we just simulate ungetting by modifying chars_read_total,
-    token_string. The next call to get() will behave as if the unget character
+    chars_read_current_line, and token_string. The next call to get() will
-    is read again.
+    behave as if the unget character is read again.
    */
    void unget()
    {
        next_unget = true;
-        --chars_read;
+
        --position.chars_read_total;
        // in case we "unget" a newline, we have to also decrement the lines_read
        if (position.chars_read_current_line == 0)
        {
            if (position.lines_read > 0)
            {
                --position.lines_read;
            }
        }
        else
        {
            --position.chars_read_current_line;
        }
        if (JSON_LIKELY(current != std::char_traits<char>::eof()))
        {
            assert(token_string.size() != 0);
@ -1159,9 +1342,9 @@ scan_number_done:
    /////////////////////
    /// return position of last read token
-    constexpr std::size_t get_position() const noexcept
+    constexpr position_t get_position() const noexcept
    {
-        return chars_read;
+        return position;
    }
    /// return the last read token (for errors only).  Will never contain EOF
@ -1208,30 +1391,20 @@ scan_number_done:
    {
        if (get() == 0xEF)
        {
-            if (get() == 0xBB and get() == 0xBF)
+            // check if we completely parse the BOM
-            {
+            return 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())
+        if (position.chars_read_total == 0 and not skip_bom())
        {
            error_message = "invalid BOM; must be 0xEF 0xBB 0xBF if given";
            return token_type::parse_error;
@ -1309,8 +1482,8 @@ scan_number_done:
    /// whether the next get() call should just return current
    bool next_unget = false;
-    /// the number of characters read
+    /// the start position of the current token
-    std::size_t chars_read = 0;
+    position_t position;
    /// raw input token string (for error messages)
    std::vector<char> token_string {};
@ -1329,5 +1502,5 @@ scan_number_done:
    /// the decimal point
    const char decimal_point_char = '.';
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/input/parser.hpp
+++ b/include/nlohmann/detail/input/parser.hpp
@ -91,7 +91,8 @@ class parser
            {
                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)));
+                                parse_error::create(101, m_lexer.get_position(),
                                                    exception_message(token_type::end_of_input, "value")));
            }
            // in case of an error, return discarded value
@ -119,7 +120,8 @@ class parser
            {
                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)));
+                                parse_error::create(101, m_lexer.get_position(),
                                                    exception_message(token_type::end_of_input, "value")));
            }
            // in case of an error, return discarded value
@ -154,7 +156,8 @@ class parser
        {
            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)));
+                                    parse_error::create(101, m_lexer.get_position(),
                                            exception_message(token_type::end_of_input, "value")));
        }
        return result;
@ -199,22 +202,21 @@ class parser
                        {
                            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)));
+                                                    parse_error::create(101, m_lexer.get_position(),
                                                            exception_message(token_type::value_string, "object key")));
                        }
                        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_error::create(101, m_lexer.get_position(),
                                                            exception_message(token_type::name_separator, "object separator")));
                        }
                        // remember we are now inside an object
@ -328,14 +330,16 @@ class parser
                        // 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)));
+                                                parse_error::create(101, m_lexer.get_position(),
                                                        exception_message(token_type::uninitialized, "value")));
                    }
                    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)));
+                                                parse_error::create(101, m_lexer.get_position(),
                                                        exception_message(token_type::literal_or_value, "value")));
                    }
                }
            }
@ -383,7 +387,8 @@ class parser
                    {
                        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)));
+                                                parse_error::create(101, m_lexer.get_position(),
                                                        exception_message(token_type::end_array, "array")));
                    }
                }
                else  // object
@ -396,7 +401,8 @@ class parser
                        {
                            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)));
+                                                    parse_error::create(101, m_lexer.get_position(),
                                                            exception_message(token_type::value_string, "object key")));
                        }
                        else
                        {
@ -411,7 +417,8 @@ class parser
                        {
                            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_error::create(101, m_lexer.get_position(),
                                                            exception_message(token_type::name_separator, "object separator")));
                        }
                        // parse values
@ -440,7 +447,8 @@ class parser
                    {
                        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)));
+                                                parse_error::create(101, m_lexer.get_position(),
                                                        exception_message(token_type::end_object, "object")));
                    }
                }
            }
@ -453,9 +461,17 @@ class parser
        return (last_token = m_lexer.scan());
    }
-    std::string exception_message(const token_type expected)
+    std::string exception_message(const token_type expected, const std::string& context)
    {
-        std::string error_msg = "syntax error - ";
+        std::string error_msg = "syntax error ";
        if (not context.empty())
        {
            error_msg += "while parsing " + context + " ";
        }
        error_msg += "- ";
        if (last_token == token_type::parse_error)
        {
            error_msg += std::string(m_lexer.get_error_message()) + "; last read: '" +
@ -484,5 +500,5 @@ class parser
    /// whether to throw exceptions in case of errors
    const bool allow_exceptions = true;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/input/position_t.hpp
+++ b/include/nlohmann/detail/input/position_t.hpp
@ -0,0 +1,27 @@
 #pragma once
 #include <cstddef> // size_t
 namespace nlohmann
 {
 namespace detail
 {
 /// struct to capture the start position of the current token
 struct position_t
 {
    /// the total number of characters read
    std::size_t chars_read_total = 0;
    /// the number of characters read in the current line
    std::size_t chars_read_current_line = 0;
    /// the number of lines read
    std::size_t lines_read = 0;
    /// conversion to size_t to preserve SAX interface
    constexpr operator size_t() const
    {
        return chars_read_total;
    }
 };
 }
 }
--- a/include/nlohmann/detail/iterators/internal_iterator.hpp
+++ b/include/nlohmann/detail/iterators/internal_iterator.hpp
@ -21,5 +21,5 @@ template<typename BasicJsonType> struct internal_iterator
    /// generic iterator for all other types
    primitive_iterator_t primitive_iterator {};
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/iterators/iter_impl.hpp
+++ b/include/nlohmann/detail/iterators/iter_impl.hpp
@ -610,5 +610,5 @@ class iter_impl
    /// the actual iterator of the associated instance
    internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/iterators/iteration_proxy.hpp
+++ b/include/nlohmann/detail/iterators/iteration_proxy.hpp
@ -39,9 +39,6 @@ template<typename IteratorType> class iteration_proxy
      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*()
        {
@ -124,5 +121,5 @@ template<typename IteratorType> class iteration_proxy
        return iteration_proxy_internal(container.end());
    }
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/iterators/json_reverse_iterator.hpp
+++ b/include/nlohmann/detail/iterators/json_reverse_iterator.hpp
@ -115,5 +115,5 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
        return it.operator * ();
    }
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/iterators/primitive_iterator.hpp
+++ b/include/nlohmann/detail/iterators/primitive_iterator.hpp
@ -116,5 +116,5 @@ class primitive_iterator_t
        return *this;
    }
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/json_pointer.hpp
+++ b/include/nlohmann/detail/json_pointer.hpp
@ -506,11 +506,11 @@ class json_pointer
            std::size_t slash = reference_string.find_first_of('/', 1),
            // set the beginning of the first reference token
            start = 1;
-            // we can stop if start == string::npos+1 = 0
+            // we can stop if start == 0 (if slash == std::string::npos)
            start != 0;
            // set the beginning of the next reference token
            // (will eventually be 0 if slash == std::string::npos)
-            start = slash + 1,
+            start = (slash == std::string::npos) ? 0 : slash + 1,
            // find next slash
            slash = reference_string.find_first_of('/', start))
        {
@ -693,4 +693,4 @@ class json_pointer
    /// the reference tokens
    std::vector<std::string> reference_tokens;
 };
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/json_ref.hpp
+++ b/include/nlohmann/detail/json_ref.hpp
@ -3,6 +3,8 @@
 #include <initializer_list>
 #include <utility>
 #include <nlohmann/detail/meta/type_traits.hpp>
 namespace nlohmann
 {
 namespace detail
@ -25,15 +27,19 @@ class json_ref
        : owned_value(init), value_ref(&owned_value), is_rvalue(true)
    {}
-    template<class... Args>
+    template <
-    json_ref(Args&& ... args)
+        class... Args,
-        : owned_value(std::forward<Args>(args)...), value_ref(&owned_value), is_rvalue(true)
+        enable_if_t<std::is_constructible<value_type, Args...>::value, int> = 0 >
-    {}
+    json_ref(Args && ... args)
        : owned_value(std::forward<Args>(args)...), value_ref(&owned_value),
          is_rvalue(true) {}
    // class should be movable only
    json_ref(json_ref&&) = default;
    json_ref(const json_ref&) = delete;
    json_ref& operator=(const json_ref&) = delete;
    json_ref& operator=(json_ref&&) = delete;
    ~json_ref() = default;
    value_type moved_or_copied() const
    {
@ -59,5 +65,5 @@ class json_ref
    value_type* value_ref = nullptr;
    const bool is_rvalue;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/macro_scope.hpp
+++ b/include/nlohmann/detail/macro_scope.hpp
@ -10,7 +10,7 @@
            #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
+        #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40800
            #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
        #endif
    #endif
--- a/include/nlohmann/detail/meta/cpp_future.hpp
+++ b/include/nlohmann/detail/meta/cpp_future.hpp
@ -59,5 +59,5 @@ struct static_const
 template<typename T>
 constexpr T static_const<T>::value;
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/meta/detected.hpp
+++ b/include/nlohmann/detail/meta/detected.hpp
@ -52,5 +52,5 @@ 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>;
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/meta/is_sax.hpp
+++ b/include/nlohmann/detail/meta/is_sax.hpp
@ -137,5 +137,5 @@ public:
      "Missing/invalid function: bool parse_error(std::size_t, const "
      "std::string&, const exception&)");
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/meta/type_traits.hpp
+++ b/include/nlohmann/detail/meta/type_traits.hpp
@ -65,6 +65,9 @@ using to_json_function = decltype(T::to_json(std::declval<Args>()...));
 template <typename T, typename... Args>
 using from_json_function = decltype(T::from_json(std::declval<Args>()...));
 template <typename T, typename U>
 using get_template_function = decltype(std::declval<T>().template get<U>());
 ///////////////////
 // is_ functions //
 ///////////////////
@ -185,8 +188,12 @@ struct is_compatible_integer_type
      CompatibleNumberIntegerType> {};
 // trait checking if JSONSerializer<T>::from_json(json const&, udt&) exists
-template<typename BasicJsonType, typename T>
+template <typename BasicJsonType, typename T, typename = void>
-struct has_from_json
+struct has_from_json : std::false_type {};
 template <typename BasicJsonType, typename T>
 struct has_from_json<BasicJsonType, T,
           enable_if_t<not is_basic_json<T>::value>>
 {
    using serializer = typename BasicJsonType::template json_serializer<T, void>;
@ -197,8 +204,11 @@ struct has_from_json
 // This trait checks if JSONSerializer<T>::from_json(json const&) exists
 // this overload is used for non-default-constructible user-defined-types
 template <typename BasicJsonType, typename T, typename = void>
 struct has_non_default_from_json : std::false_type {};
 template<typename BasicJsonType, typename T>
-struct has_non_default_from_json
+struct has_non_default_from_json<BasicJsonType, T, enable_if_t<not is_basic_json<T>::value>>
 {
    using serializer = typename BasicJsonType::template json_serializer<T, void>;
@ -208,8 +218,12 @@ struct has_non_default_from_json
 };
 // This trait checks if BasicJsonType::json_serializer<T>::to_json exists
-template<typename BasicJsonType, typename T>
+// Do not evaluate the trait when T is a basic_json type, to avoid template instantiation infinite recursion.
-struct has_to_json
+template <typename BasicJsonType, typename T, typename = void>
 struct has_to_json : std::false_type {};
 template <typename BasicJsonType, typename T>
 struct has_to_json<BasicJsonType, T, enable_if_t<not is_basic_json<T>::value>>
 {
    using serializer = typename BasicJsonType::template json_serializer<T, void>;
@ -233,5 +247,5 @@ struct is_compatible_type_impl <
 template <typename BasicJsonType, typename CompatibleType>
 struct is_compatible_type
    : is_compatible_type_impl<BasicJsonType, CompatibleType> {};
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/meta/void_t.hpp
+++ b/include/nlohmann/detail/meta/void_t.hpp
@ -9,5 +9,5 @@ template <typename ...Ts> struct make_void
    using type = void;
 };
 template <typename ...Ts> using void_t = typename make_void<Ts...>::type;
-}
+} // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/output/binary_writer.hpp
+++ b/include/nlohmann/detail/output/binary_writer.hpp
@ -540,9 +540,11 @@ class binary_writer
            case value_t::boolean:
            {
                if (add_prefix)
                {
                    oa->write_character(j.m_value.boolean
                                        ? static_cast<CharType>('T')
                                        : static_cast<CharType>('F'));
                }
                break;
            }
@ -1075,7 +1077,7 @@ class binary_writer
        }
        else
        {
-            JSON_THROW(out_of_range::create(407, "number overflow serializing " + std::to_string(n)));
+            JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(n) + " cannot be represented by UBJSON as it does not fit int64"));
        }
    }
@ -1129,7 +1131,7 @@ class binary_writer
        // LCOV_EXCL_START
        else
        {
-            JSON_THROW(out_of_range::create(407, "number overflow serializing " + std::to_string(n)));
+            JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(n) + " cannot be represented by UBJSON as it does not fit int64"));
        }
        // LCOV_EXCL_STOP
    }
@ -1159,23 +1161,21 @@ class binary_writer
                {
                    return 'i';
                }
-                else if ((std::numeric_limits<uint8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<uint8_t>::max)())
+                if ((std::numeric_limits<uint8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<uint8_t>::max)())
                {
                    return 'U';
                }
-                else if ((std::numeric_limits<int16_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int16_t>::max)())
+                if ((std::numeric_limits<int16_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int16_t>::max)())
                {
                    return 'I';
                }
-                else if ((std::numeric_limits<int32_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int32_t>::max)())
+                if ((std::numeric_limits<int32_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int32_t>::max)())
                {
                    return 'l';
                }
-                else  // no check and assume int64_t (see note above)
+                // no check and assume int64_t (see note above)
                {
                return 'L';
            }
            }
            case value_t::number_unsigned:
            {
@ -1183,23 +1183,21 @@ class binary_writer
                {
                    return 'i';
                }
-                else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
+                if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
                {
                    return 'U';
                }
-                else if (j.m_value.number_unsigned <= (std::numeric_limits<int16_t>::max)())
+                if (j.m_value.number_unsigned <= (std::numeric_limits<int16_t>::max)())
                {
                    return 'I';
                }
-                else if (j.m_value.number_unsigned <= (std::numeric_limits<int32_t>::max)())
+                if (j.m_value.number_unsigned <= (std::numeric_limits<int32_t>::max)())
                {
                    return 'l';
                }
-                else  // no check and assume int64_t (see note above)
+                // no check and assume int64_t (see note above)
                {
                return 'L';
            }
            }
            case value_t::number_float:
                return get_ubjson_float_prefix(j.m_value.number_float);
@ -1218,32 +1216,32 @@ class binary_writer
        }
    }
-    static constexpr CharType get_cbor_float_prefix(float)
+    static constexpr CharType get_cbor_float_prefix(float /*unused*/)
    {
        return static_cast<CharType>(0xFA);  // Single-Precision Float
    }
-    static constexpr CharType get_cbor_float_prefix(double)
+    static constexpr CharType get_cbor_float_prefix(double /*unused*/)
    {
        return static_cast<CharType>(0xFB);  // Double-Precision Float
    }
-    static constexpr CharType get_msgpack_float_prefix(float)
+    static constexpr CharType get_msgpack_float_prefix(float /*unused*/)
    {
        return static_cast<CharType>(0xCA);  // float 32
    }
-    static constexpr CharType get_msgpack_float_prefix(double)
+    static constexpr CharType get_msgpack_float_prefix(double /*unused*/)
    {
        return static_cast<CharType>(0xCB);  // float 64
    }
-    static constexpr CharType get_ubjson_float_prefix(float)
+    static constexpr CharType get_ubjson_float_prefix(float /*unused*/)
    {
        return 'd';  // float 32
    }
-    static constexpr CharType get_ubjson_float_prefix(double)
+    static constexpr CharType get_ubjson_float_prefix(double /*unused*/)
    {
        return 'D';  // float 64
    }
@ -1255,5 +1253,5 @@ class binary_writer
    /// the output
    output_adapter_t<CharType> oa = nullptr;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/output/output_adapters.hpp
+++ b/include/nlohmann/detail/output/output_adapters.hpp
@ -109,5 +109,5 @@ class output_adapter
  private:
    output_adapter_t<CharType> oa = nullptr;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@ -53,6 +53,9 @@ class serializer
    // delete because of pointer members
    serializer(const serializer&) = delete;
    serializer& operator=(const serializer&) = delete;
    serializer(serializer&&) = delete;
    serializer& operator=(serializer&&) = delete;
    ~serializer() = default;
    /*!
    @brief internal implementation of the serialization function
@ -442,7 +445,7 @@ class serializer
            return;
        }
-        const bool is_negative = (x <= 0) and (x != 0);  // see issue #755
+        const bool is_negative = std::is_same<NumberType, number_integer_t>::value and not (x >= 0);  // see issue #755
        std::size_t i = 0;
        while (x != 0)
@ -627,5 +630,5 @@ class serializer
    /// the indentation string
    string_t indent_string;
 };
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/detail/value_t.hpp
+++ b/include/nlohmann/detail/value_t.hpp
@ -72,5 +72,5 @@ inline bool operator<(const value_t lhs, const value_t rhs) noexcept
    const auto r_index = static_cast<std::size_t>(rhs);
    return l_index < order.size() and r_index < order.size() and order[l_index] < order[r_index];
 }
-}
+}  // namespace detail
-}
+}  // namespace nlohmann
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -31,7 +31,7 @@ SOFTWARE.
 #define NLOHMANN_JSON_HPP
 #define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 2
+#define NLOHMANN_JSON_VERSION_MINOR 3
 #define NLOHMANN_JSON_VERSION_PATCH 0
 #include <algorithm> // all_of, find, for_each
@ -947,7 +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 3.2.0")); // LCOV_EXCL_LINE
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.3.0")); // LCOV_EXCL_LINE
                    }
                    break;
                }
@ -1866,7 +1866,7 @@ class basic_json
    @since version 1.0.0
    */
-    reference& operator=(basic_json other) noexcept (
+    basic_json& operator=(basic_json other) noexcept (
        std::is_nothrow_move_constructible<value_t>::value and
        std::is_nothrow_move_assignable<value_t>::value and
        std::is_nothrow_move_constructible<json_value>::value and
@ -2624,51 +2624,50 @@ class basic_json
    }
    /*!
-    @brief get a pointer value (explicit)
+    @brief get a value (explicit)
-    Explicit pointer access to the internally stored JSON value. No copies are
+    Explicit type conversion between the JSON value and a compatible value.
-    made.
+    The value is filled into the input parameter by calling the @ref json_serializer<ValueType>
    `from_json()` method.
-    @warning The pointer becomes invalid if the underlying JSON object
+    The function is equivalent to executing
-    changes.
+    @code {.cpp}
    ValueType v;
    JSONSerializer<ValueType>::from_json(*this, v);
    @endcode
-    @tparam PointerType pointer type; must be a pointer to @ref array_t, @ref
+    This overloads is chosen if:
-    object_t, @ref string_t, @ref boolean_t, @ref number_integer_t,
+    - @a ValueType is not @ref basic_json,
-    @ref number_unsigned_t, or @ref number_float_t.
+    - @ref json_serializer<ValueType> has a `from_json()` method of the form
      `void from_json(const basic_json&, ValueType&)`, and
-    @return pointer to the internally stored JSON value if the requested
+    @tparam ValueType the input parameter type.
    pointer type @a PointerType fits to the JSON value; `nullptr` otherwise
-    @complexity Constant.
+    @return the input parameter, allowing chaining calls.
-    @liveexample{The example below shows how pointers to internal values of a
+    @throw what @ref json_serializer<ValueType> `from_json()` method throws
    JSON value can be requested. Note that no type conversions are made and a
    `nullptr` is returned if the value and the requested pointer type does not
    match.,get__PointerType}
-    @sa @ref get_ptr() for explicit pointer-member access
+    @liveexample{The example below shows several conversions from JSON values
    to other types. There a few things to note: (1) Floating-point numbers can
    be converted to integers\, (2) A JSON array can be converted to a standard
    `std::vector<short>`\, (3) A JSON object can be converted to C++
    associative containers such as `std::unordered_map<std::string\,
    json>`.,get_to}
-    @since version 1.0.0
+    @since version 3.3.0
    */
-    template<typename PointerType, typename std::enable_if<
+    template<typename ValueType,
-                 std::is_pointer<PointerType>::value, int>::type = 0>
+             detail::enable_if_t <
-    PointerType get() noexcept
+                 not detail::is_basic_json<ValueType>::value and
                 detail::has_from_json<basic_json_t, ValueType>::value,
                 int> = 0>
    ValueType & get_to(ValueType& v) const noexcept(noexcept(
                JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>(), v)))
    {
-        // delegate the call to get_ptr
+        JSONSerializer<ValueType>::from_json(*this, v);
-        return get_ptr<PointerType>();
+        return v;
    }
    /*!
    @brief get a pointer value (explicit)
    @copydoc get()
    */
    template<typename PointerType, typename std::enable_if<
                 std::is_pointer<PointerType>::value, int>::type = 0>
    constexpr const PointerType get() const noexcept
    {
        // delegate the call to get_ptr
        return get_ptr<PointerType>();
    }
    /*!
    @brief get a pointer value (implicit)
@ -2698,23 +2697,8 @@ class basic_json
    */
    template<typename PointerType, typename std::enable_if<
                 std::is_pointer<PointerType>::value, int>::type = 0>
-    PointerType get_ptr() noexcept
+    auto get_ptr() noexcept -> decltype(std::declval<basic_json_t&>().get_impl_ptr(std::declval<PointerType>()))
    {
        // get the type of the PointerType (remove pointer and const)
        using pointee_t = typename std::remove_const<typename
                          std::remove_pointer<typename
                          std::remove_const<PointerType>::type>::type>::type;
        // make sure the type matches the allowed types
        static_assert(
            std::is_same<object_t, pointee_t>::value
            or std::is_same<array_t, pointee_t>::value
            or std::is_same<string_t, pointee_t>::value
            or std::is_same<boolean_t, pointee_t>::value
            or std::is_same<number_integer_t, pointee_t>::value
            or std::is_same<number_unsigned_t, pointee_t>::value
            or std::is_same<number_float_t, pointee_t>::value
            , "incompatible pointer type");
        // delegate the call to get_impl_ptr<>()
        return get_impl_ptr(static_cast<PointerType>(nullptr));
    }
@ -2726,27 +2710,59 @@ class basic_json
    template<typename PointerType, typename std::enable_if<
                 std::is_pointer<PointerType>::value and
                 std::is_const<typename std::remove_pointer<PointerType>::type>::value, int>::type = 0>
-    constexpr const PointerType get_ptr() const noexcept
+    constexpr auto get_ptr() const noexcept -> decltype(std::declval<const basic_json_t&>().get_impl_ptr(std::declval<PointerType>()))
    {
        // get the type of the PointerType (remove pointer and const)
        using pointee_t = typename std::remove_const<typename
                          std::remove_pointer<typename
                          std::remove_const<PointerType>::type>::type>::type;
        // make sure the type matches the allowed types
        static_assert(
            std::is_same<object_t, pointee_t>::value
            or std::is_same<array_t, pointee_t>::value
            or std::is_same<string_t, pointee_t>::value
            or std::is_same<boolean_t, pointee_t>::value
            or std::is_same<number_integer_t, pointee_t>::value
            or std::is_same<number_unsigned_t, pointee_t>::value
            or std::is_same<number_float_t, pointee_t>::value
            , "incompatible pointer type");
        // delegate the call to get_impl_ptr<>() const
        return get_impl_ptr(static_cast<PointerType>(nullptr));
    }
    /*!
    @brief get a pointer value (explicit)
    Explicit pointer access to the internally stored JSON value. No copies are
    made.
    @warning The pointer becomes invalid if the underlying JSON object
    changes.
    @tparam PointerType pointer type; must be a pointer to @ref array_t, @ref
    object_t, @ref string_t, @ref boolean_t, @ref number_integer_t,
    @ref number_unsigned_t, or @ref number_float_t.
    @return pointer to the internally stored JSON value if the requested
    pointer type @a PointerType fits to the JSON value; `nullptr` otherwise
    @complexity Constant.
    @liveexample{The example below shows how pointers to internal values of a
    JSON value can be requested. Note that no type conversions are made and a
    `nullptr` is returned if the value and the requested pointer type does not
    match.,get__PointerType}
    @sa @ref get_ptr() for explicit pointer-member access
    @since version 1.0.0
    */
    template<typename PointerType, typename std::enable_if<
                 std::is_pointer<PointerType>::value, int>::type = 0>
    auto get() noexcept -> decltype(std::declval<basic_json_t&>().template get_ptr<PointerType>())
    {
        // delegate the call to get_ptr
        return get_ptr<PointerType>();
    }
    /*!
    @brief get a pointer value (explicit)
    @copydoc get()
    */
    template<typename PointerType, typename std::enable_if<
                 std::is_pointer<PointerType>::value, int>::type = 0>
    constexpr auto get() const noexcept -> decltype(std::declval<const basic_json_t&>().template get_ptr<PointerType>())
    {
        // delegate the call to get_ptr
        return get_ptr<PointerType>();
    }
    /*!
    @brief get a reference value (implicit)
@ -2828,12 +2844,14 @@ class basic_json
                   not std::is_same<ValueType, detail::json_ref<basic_json>>::value and
                   not std::is_same<ValueType, typename string_t::value_type>::value and
                   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
 #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
                   and detail::is_detected<detail::get_template_function, const basic_json_t&, ValueType>::value
                   , int >::type = 0 >
    operator ValueType() const
    {
@ -3097,7 +3115,7 @@ class basic_json
            return m_value.array->operator[](idx);
        }
-        JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a numeric argument with " + std::string(type_name())));
    }
    /*!
@ -3127,7 +3145,7 @@ class basic_json
            return m_value.array->operator[](idx);
        }
-        JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a numeric argument with " + std::string(type_name())));
    }
    /*!
@ -3173,7 +3191,7 @@ class basic_json
            return m_value.object->operator[](key);
        }
-        JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
    }
    /*!
@ -3215,7 +3233,7 @@ class basic_json
            return m_value.object->find(key)->second;
        }
-        JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
    }
    /*!
@ -3262,7 +3280,7 @@ class basic_json
            return m_value.object->operator[](key);
        }
-        JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
    }
    /*!
@ -3305,7 +3323,7 @@ class basic_json
            return m_value.object->find(key)->second;
        }
-        JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+        JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
    }
    /*!
@ -4943,6 +4961,26 @@ class basic_json
        return {it, res.second};
    }
    /// Helper for insertion of an iterator
    /// @note: This uses std::distance to support GCC 4.8,
    ///        see https://github.com/nlohmann/json/pull/1257
    template<typename... Args>
    iterator insert_iterator(const_iterator pos, Args&& ... args)
    {
        iterator result(this);
        assert(m_value.array != nullptr);
        auto insert_pos = std::distance(m_value.array->begin(), pos.m_it.array_iterator);
        m_value.array->insert(pos.m_it.array_iterator, std::forward<Args>(args)...);
        result.m_it.array_iterator = m_value.array->begin() + insert_pos;
        // This could have been written as:
        // result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, cnt, val);
        // but the return value of insert is missing in GCC 4.8, so it is written this way instead.
        return result;
    }
    /*!
    @brief inserts element
@ -4977,9 +5015,7 @@ class basic_json
            }
            // insert to array and return iterator
-            iterator result(this);
+            return insert_iterator(pos, val);
            result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, val);
            return result;
        }
        JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
@ -5030,9 +5066,7 @@ class basic_json
            }
            // insert to array and return iterator
-            iterator result(this);
+            return insert_iterator(pos, cnt, val);
            result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, cnt, val);
            return result;
        }
        JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
@ -5094,12 +5128,7 @@ class basic_json
        }
        // insert to array and return iterator
-        iterator result(this);
+        return insert_iterator(pos, first.m_it.array_iterator, last.m_it.array_iterator);
        result.m_it.array_iterator = m_value.array->insert(
                                         pos.m_it.array_iterator,
                                         first.m_it.array_iterator,
                                         last.m_it.array_iterator);
        return result;
    }
    /*!
@ -5141,9 +5170,7 @@ class basic_json
        }
        // insert to array and return iterator
-        iterator result(this);
+        return insert_iterator(pos, ilist.begin(), ilist.end());
        result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, ilist.begin(), ilist.end());
        return result;
    }
    /*!
@ -5972,6 +5999,8 @@ class basic_json
    @param[in] cb  a parser callback function of type @ref parser_callback_t
    which is used to control the deserialization by filtering unwanted values
    (optional)
    @param[in] allow_exceptions  whether to throw exceptions in case of a
    parse error (optional, true by default)
    @return result of the deserialization
@ -6367,7 +6396,7 @@ class basic_json
    vector in CBOR format.,to_cbor}
    @sa http://cbor.io
-    @sa @ref from_cbor(detail::input_adapter, const bool strict) for the
+    @sa @ref from_cbor(detail::input_adapter&&, const bool, const bool) for the
        analogous deserialization
    @sa @ref to_msgpack(const basic_json&) for the related MessagePack format
    @sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
@ -6464,8 +6493,7 @@ class basic_json
    vector in MessagePack format.,to_msgpack}
    @sa http://msgpack.org
-    @sa @ref from_msgpack(const std::vector<uint8_t>&, const size_t) for the
+    @sa @ref from_msgpack for the analogous deserialization
        analogous deserialization
    @sa @ref to_cbor(const basic_json& for the related CBOR format
    @sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
             related UBJSON format
@ -6562,7 +6590,7 @@ class basic_json
    vector in UBJSON format.,to_ubjson}
    @sa http://ubjson.org
-    @sa @ref from_ubjson(detail::input_adapter, const bool strict) for the
+    @sa @ref from_ubjson(detail::input_adapter&&, const bool, const bool) for the
        analogous deserialization
    @sa @ref to_cbor(const basic_json& for the related CBOR format
    @sa @ref to_msgpack(const basic_json&) for the related MessagePack format
@ -6758,14 +6786,14 @@ 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, 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, const bool) for the
+    @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; added @allow_exceptions parameter
+           @a strict parameter since 3.0.0; added @a allow_exceptions parameter
           since 3.2.0
    */
    static basic_json from_cbor(detail::input_adapter&& i,
@ -6779,7 +6807,7 @@ class basic_json
    }
    /*!
-    @copydoc from_cbor(detail::input_adapter, const bool, 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>
@ -6861,16 +6889,16 @@ 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, const bool) for the
+    @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
+    @sa @ref from_ubjson(detail::input_adapter&&, const bool, const bool) for
        the related UBJSON format
    @sa @ref from_bson(detail::input_adapter, const bool, const bool) for
        the related BSON 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; added @allow_exceptions parameter
+           @a strict parameter since 3.0.0; added @a allow_exceptions parameter
           since 3.2.0
    */
    static basic_json from_msgpack(detail::input_adapter&& i,
@ -6884,7 +6912,7 @@ class basic_json
    }
    /*!
-    @copydoc from_msgpack(detail::input_adapter, const bool, 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>
@ -6948,14 +6976,14 @@ 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, const bool) for the
+    @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
+    @sa @ref from_msgpack(detail::input_adapter&&, const bool, const bool) for
        the related MessagePack format
    @sa @ref from_bson(detail::input_adapter, const bool, const bool) for
        the related BSON format
-    @since version 3.1.0; added @allow_exceptions parameter since 3.2.0
+    @since version 3.1.0; added @a allow_exceptions parameter since 3.2.0
    */
    static basic_json from_ubjson(detail::input_adapter&& i,
                                  const bool strict = true,
@ -6968,7 +6996,7 @@ class basic_json
    }
    /*!
-    @copydoc from_ubjson(detail::input_adapter, const bool, const bool)
+    @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>
@ -7432,12 +7460,10 @@ class basic_json
                                // avoid undefined behavior
                                JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range"));
                            }
-                            else
+
                            {
                            // default case: insert add offset
                            parent.insert(parent.begin() + static_cast<difference_type>(idx), val);
                        }
                        }
                        break;
                    }
@ -7861,19 +7887,6 @@ class basic_json
 // specialization of std::swap, and std::hash
 namespace std
 {
 /*!
@brief exchanges the values of two JSON objects
@since version 1.0.0
 */
 template<>
 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);
 }
 /// hash value for JSON objects
 template<>
@ -7909,6 +7922,20 @@ struct less< ::nlohmann::detail::value_t>
    }
 };
 /*!
@brief exchanges the values of two JSON objects
@since version 1.0.0
 */
 template<>
 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);
 }
 } // namespace std
 /*!
--- a/include/nlohmann/json_fwd.hpp
+++ b/include/nlohmann/json_fwd.hpp
@ -59,6 +59,6 @@ uses the standard template types.
@since version 1.0.0
 */
 using json = basic_json<>;
-}
+}  // namespace nlohmann
 #endif
--- a/meson.build
+++ b/meson.build
@ -1,4 +1,8 @@
-project('nlohmann_json', 'cpp')
+project('nlohmann_json',
    'cpp',
    version : '3.3.0',
    license : 'MIT',
 )
 nlohmann_json_dep = declare_dependency(
    include_directories: include_directories('single_include')
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@ -96,22 +96,21 @@ foreach(file ${files})
    string(REGEX REPLACE "unit-([^$]+)" "test-\\1" testcase ${file_basename})
    add_executable(${testcase} $<TARGET_OBJECTS:catch_main> ${file})
-    set_target_properties(${testcase} PROPERTIES
+    target_compile_definitions(${testcase} PRIVATE
-        COMPILE_DEFINITIONS "$<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>"
+      CATCH_CONFIG_FAST_COMPILE
-        COMPILE_OPTIONS "$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>"
+      $<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>
    )
    target_compile_options(${testcase} PRIVATE
        $<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>
        $<$<NOT:$<CXX_COMPILER_ID:MSVC>>:-Wno-deprecated;-Wno-float-equal>
        $<$<CXX_COMPILER_ID:GNU>:-Wno-deprecated-declarations>
    )
    target_include_directories(${testcase} PRIVATE
        thirdparty/catch
        thirdparty/fifo_map
    )
    target_compile_definitions(${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 ${NLOHMANN_JSON_INCLUDE_BUILD_DIR})
    target_link_libraries(${testcase} ${NLOHMANN_JSON_TARGET_NAME})
    if(NOT MSVC)
        set_target_properties(${testcase} PROPERTIES COMPILE_FLAGS "${CMAKE_CXX_FLAGS} -Wno-deprecated -Wno-float-equal")
    endif()
    add_test(NAME "${testcase}_default"
      COMMAND ${testcase} ${CATCH_TEST_FILTER}
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
@ -131,5 +130,11 @@ foreach(file ${files})
        )
        set_tests_properties("${testcase}_valgrind" PROPERTIES LABELS "valgrind")
    endif()
 endforeach()
 #############################################################################
 # Test the generated build configs
 #############################################################################
 add_subdirectory(cmake_import)
 add_subdirectory(cmake_import_minver)
 add_subdirectory(cmake_add_subdirectory)
--- a/test/cmake_add_subdirectory/CMakeLists.txt
+++ b/test/cmake_add_subdirectory/CMakeLists.txt
@ -0,0 +1,15 @@
 add_test(NAME cmake_add_subdirectory_configure
  COMMAND ${CMAKE_COMMAND}
    -G "${CMAKE_GENERATOR}"
    -Dnlohmann_json_source=${PROJECT_SOURCE_DIR}
    ${CMAKE_CURRENT_SOURCE_DIR}/project
 )
 add_test(NAME cmake_add_subdirectory_build
  COMMAND ${CMAKE_COMMAND} --build .
 )
 set_tests_properties(cmake_add_subdirectory_configure PROPERTIES
  FIXTURES_SETUP cmake_add_subdirectory
 )
 set_tests_properties(cmake_add_subdirectory_build PROPERTIES
  FIXTURES_REQUIRED cmake_add_subdirectory
 )
--- a/test/cmake_add_subdirectory/project/CMakeLists.txt
+++ b/test/cmake_add_subdirectory/project/CMakeLists.txt
@ -0,0 +1,13 @@
 cmake_minimum_required(VERSION 3.8)
 project(DummyImport CXX)
 set(JSON_BuildTests OFF CACHE INTERNAL "")
 add_subdirectory(${nlohmann_json_source}
   ${CMAKE_CURRENT_BINARY_DIR}/nlohmann_json)
 add_executable(with_namespace_target main.cpp)
 target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)
 add_executable(without_namespace_target main.cpp)
 target_link_libraries(without_namespace_target nlohmann_json)
--- a/test/cmake_add_subdirectory/project/main.cpp
+++ b/test/cmake_add_subdirectory/project/main.cpp
@ -0,0 +1,8 @@
 #include <nlohmann/json.hpp>
 int main(int argc, char **argv)
 {
    nlohmann::json j;
    return 0;
 }
--- a/test/cmake_import/CMakeLists.txt
+++ b/test/cmake_import/CMakeLists.txt
@ -0,0 +1,15 @@
 add_test(NAME cmake_import_configure
  COMMAND ${CMAKE_COMMAND}
    -G "${CMAKE_GENERATOR}"
    -Dnlohmann_json_DIR=${PROJECT_BINARY_DIR}
    ${CMAKE_CURRENT_SOURCE_DIR}/project
 )
 add_test(NAME cmake_import_build
  COMMAND ${CMAKE_COMMAND} --build .
 )
 set_tests_properties(cmake_import_configure PROPERTIES
  FIXTURES_SETUP cmake_import
 )
 set_tests_properties(cmake_import_build PROPERTIES
  FIXTURES_REQUIRED cmake_import
 )
--- a/test/cmake_import/project/CMakeLists.txt
+++ b/test/cmake_import/project/CMakeLists.txt
@ -0,0 +1,12 @@
 cmake_minimum_required(VERSION 3.8)
 project(DummyImport CXX)
 find_package(nlohmann_json REQUIRED)
 add_executable(with_namespace_target main.cpp)
 target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)
 add_executable(without_namespace_target main.cpp)
 target_link_libraries(without_namespace_target nlohmann_json)
--- a/test/cmake_import/project/main.cpp
+++ b/test/cmake_import/project/main.cpp
@ -0,0 +1,8 @@
 #include <nlohmann/json.hpp>
 int main(int argc, char **argv)
 {
    nlohmann::json j;
    return 0;
 }
--- a/test/cmake_import_minver/CMakeLists.txt
+++ b/test/cmake_import_minver/CMakeLists.txt
@ -0,0 +1,15 @@
 add_test(NAME cmake_import_minver_configure
  COMMAND ${CMAKE_COMMAND}
    -G "${CMAKE_GENERATOR}"
    -Dnlohmann_json_DIR=${PROJECT_BINARY_DIR}
    ${CMAKE_CURRENT_SOURCE_DIR}/project
 )
 add_test(NAME cmake_import_minver_build
  COMMAND ${CMAKE_COMMAND} --build .
 )
 set_tests_properties(cmake_import_minver_configure PROPERTIES
  FIXTURES_SETUP cmake_import_minver
 )
 set_tests_properties(cmake_import_minver_build PROPERTIES
  FIXTURES_REQUIRED cmake_import_minver
 )
--- a/test/cmake_import_minver/project/CMakeLists.txt
+++ b/test/cmake_import_minver/project/CMakeLists.txt
@ -0,0 +1,8 @@
 cmake_minimum_required(VERSION 3.8)
 project(DummyImportMinVer CXX)
 find_package(nlohmann_json 3.2.0 REQUIRED)
 add_executable(with_namespace_target main.cpp)
 target_link_libraries(with_namespace_target nlohmann_json::nlohmann_json)
--- a/test/cmake_import_minver/project/main.cpp
+++ b/test/cmake_import_minver/project/main.cpp
@ -0,0 +1,8 @@
 #include <nlohmann/json.hpp>
 int main(int argc, char **argv)
 {
    nlohmann::json j;
    return 0;
 }
--- 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 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 This file implements a driver for American Fuzzy Lop (afl-fuzz). It relies on
--- 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 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 This file implements a parser test suitable for fuzz testing. Given a byte
--- 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 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 This file implements a parser test suitable for fuzz testing. Given a byte
--- 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 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 This file implements a parser test suitable for fuzz testing. Given a byte
--- 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 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 This file implements a parser test suitable for fuzz testing. Given a byte
--- a/test/src/unit-algorithms.cpp
+++ b/test/src/unit-algorithms.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-allocator.cpp
+++ b/test/src/unit-allocator.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-alt-string.cpp
+++ b/test/src/unit-alt-string.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-bson.cpp
+++ b/test/src/unit-bson.cpp
@ -679,7 +679,8 @@ TEST_CASE("Incomplete BSON INPUT")
    };
    CHECK_THROWS_WITH(json::from_bson(incomplete_bson),
-                      "[json.exception.parse_error.110] parse error at 9: unexpected end of input");
+                      "[json.exception.parse_error.110] parse error at byte 9: syntax error while parsing BSON cstring: unexpected end of input");
    CHECK(json::from_bson(incomplete_bson, true, false).is_discarded());
    SaxCountdown scp(0);
@ -695,7 +696,7 @@ TEST_CASE("Incomplete BSON INPUT 2")
    };
    CHECK_THROWS_WITH(json::from_bson(incomplete_bson),
-                      "[json.exception.parse_error.110] parse error at 6: unexpected end of input");
+                      "[json.exception.parse_error.110] parse error at byte 6: syntax error while parsing BSON cstring: unexpected end of input");
    CHECK(json::from_bson(incomplete_bson, true, false).is_discarded());
    SaxCountdown scp(0);
@ -717,7 +718,7 @@ TEST_CASE("Incomplete BSON INPUT 3")
        // missing input data...
    };
    CHECK_THROWS_WITH(json::from_bson(incomplete_bson),
-                      "[json.exception.parse_error.110] parse error at 28: unexpected end of input");
+                      "[json.exception.parse_error.110] parse error at byte 28: syntax error while parsing BSON element list: unexpected end of input");
    CHECK(json::from_bson(incomplete_bson, true, false).is_discarded());
    SaxCountdown scp(1);
@ -734,7 +735,7 @@ TEST_CASE("Incomplete BSON INPUT 4")
    };
    CHECK_THROWS_WITH(json::from_bson(incomplete_bson),
-                      "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                      "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing BSON number: unexpected end of input");
    CHECK(json::from_bson(incomplete_bson, true, false).is_discarded());
    SaxCountdown scp(0);
@ -753,7 +754,7 @@ TEST_CASE("Unsupported BSON input")
    };
    CHECK_THROWS_WITH(json::from_bson(bson),
-                      "[json.exception.parse_error.114] parse error at 5: Unsupported BSON record type 0xFF");
+                      "[json.exception.parse_error.114] parse error at byte 5: Unsupported BSON record type 0xFF");
    CHECK(json::from_bson(bson, true, false).is_discarded());
    SaxCountdown scp(0);
--- a/test/src/unit-capacity.cpp
+++ b/test/src/unit-capacity.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-cbor.cpp
+++ b/test/src/unit-cbor.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -831,14 +831,14 @@ 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");
+                                          "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR number: 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");
+                                          "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR number: unexpected end of input");
                        CHECK(json::from_cbor(std::vector<uint8_t>({0xf9, 0x7c}), true, false).is_discarded());
                    }
                }
@ -1314,7 +1314,7 @@ 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");
+                              "[json.exception.parse_error.110] parse error at byte 1: syntax error while parsing CBOR value: unexpected end of input");
            CHECK(json::from_cbor(std::vector<uint8_t>(), true, false).is_discarded());
        }
@ -1346,53 +1346,53 @@ TEST_CASE("CBOR")
            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");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x19})),
-                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x19, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1a})),
-                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1a, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1a, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1a, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 5: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b})),
-                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 5: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 6: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 6: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 7: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 7: syntax error while parsing CBOR number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_cbor(std::vector<uint8_t>({0x1b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 8: syntax error while parsing CBOR number: 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");
+                              "[json.exception.parse_error.110] parse error at byte 9: syntax error while parsing CBOR number: 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");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR value: 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");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing CBOR value: 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");
+                              "[json.exception.parse_error.110] parse error at byte 5: syntax error while parsing CBOR string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing CBOR value: 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");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing CBOR value: 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());
@ -1426,12 +1426,12 @@ 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");
+                                  "[json.exception.parse_error.112] parse error at byte 1: syntax error while parsing CBOR value: invalid 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");
+                                  "[json.exception.parse_error.112] parse error at byte 1: syntax error while parsing CBOR value: invalid byte: 0xF8");
                CHECK(json::from_cbor(std::vector<uint8_t>({0xf8}), true, false).is_discarded());
            }
@ -1491,7 +1491,7 @@ 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");
+                              "[json.exception.parse_error.113] parse error at byte 2: syntax error while parsing CBOR string: expected length specification (0x60-0x7B) or indefinite string type (0x7F); last byte: 0xFF");
            CHECK(json::from_cbor(std::vector<uint8_t>({0xa1, 0xff, 0x01}), true, false).is_discarded());
        }
@ -1509,7 +1509,7 @@ 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");
+                                  "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing CBOR value: expected end of input; last byte: 0xF6");
                CHECK(json::from_cbor(vec, true, false).is_discarded());
            }
        }
--- a/test/src/unit-class_const_iterator.cpp
+++ b/test/src/unit-class_const_iterator.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-class_iterator.cpp
+++ b/test/src/unit-class_iterator.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-class_lexer.cpp
+++ b/test/src/unit-class_lexer.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-class_parser.cpp
+++ b/test/src/unit-class_parser.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -313,18 +313,18 @@ TEST_CASE("parser class")
                // error: tab in string
                CHECK_THROWS_AS(parser_helper("\"\t\""), json::parse_error&);
                CHECK_THROWS_WITH(parser_helper("\"\t\""),
-                                  "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0009>'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0009 (HT) must be escaped to \\u0009 or \\t; last read: '\"<U+0009>'");
                // error: newline in string
                CHECK_THROWS_AS(parser_helper("\"\n\""), json::parse_error&);
                CHECK_THROWS_AS(parser_helper("\"\r\""), json::parse_error&);
                CHECK_THROWS_WITH(parser_helper("\"\n\""),
-                                  "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000A>'");
+                                  "[json.exception.parse_error.101] parse error at line 2, column 0: syntax error while parsing value - invalid string: control character U+000A (LF) must be escaped to \\u000A or \\n; last read: '\"<U+000A>'");
                CHECK_THROWS_WITH(parser_helper("\"\r\""),
-                                  "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000D>'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+000D (CR) must be escaped to \\u000D or \\r; last read: '\"<U+000D>'");
                // error: backspace in string
                CHECK_THROWS_AS(parser_helper("\"\b\""), json::parse_error&);
                CHECK_THROWS_WITH(parser_helper("\"\b\""),
-                                  "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0008>'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0008 (BS) must be escaped to \\u0008 or \\b; last read: '\"<U+0008>'");
                // improve code coverage
                CHECK_THROWS_AS(parser_helper("\uFF01"), json::parse_error&);
                CHECK_THROWS_AS(parser_helper("[-4:1,]"), json::parse_error&);
@ -361,38 +361,38 @@ TEST_CASE("parser class")
                CHECK_THROWS_AS(parser_helper("\"\x1d\""), json::parse_error&);
                CHECK_THROWS_AS(parser_helper("\"\x1e\""), json::parse_error&);
                CHECK_THROWS_AS(parser_helper("\"\x1f\""), json::parse_error&);
-                CHECK_THROWS_WITH(parser_helper("\"\x00\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: missing closing quote; last read: '\"'");
+                CHECK_THROWS_WITH(parser_helper("\"\x00\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: missing closing quote; last read: '\"'");
-                CHECK_THROWS_WITH(parser_helper("\"\x01\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0001>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x01\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0001 (SOH) must be escaped to \\u0001; last read: '\"<U+0001>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x02\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0002>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x02\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0002 (STX) must be escaped to \\u0002; last read: '\"<U+0002>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x03\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0003>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x03\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0003 (ETX) must be escaped to \\u0003; last read: '\"<U+0003>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x04\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0004>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x04\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0004 (EOT) must be escaped to \\u0004; last read: '\"<U+0004>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x05\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0005>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x05\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0005 (ENQ) must be escaped to \\u0005; last read: '\"<U+0005>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x06\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0006>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x06\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0006 (ACK) must be escaped to \\u0006; last read: '\"<U+0006>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x07\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0007>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x07\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0007 (BEL) must be escaped to \\u0007; last read: '\"<U+0007>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x08\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0008>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x08\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0008 (BS) must be escaped to \\u0008 or \\b; last read: '\"<U+0008>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x09\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0009>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x09\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0009 (HT) must be escaped to \\u0009 or \\t; last read: '\"<U+0009>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x0a\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000A>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x0a\""), "[json.exception.parse_error.101] parse error at line 2, column 0: syntax error while parsing value - invalid string: control character U+000A (LF) must be escaped to \\u000A or \\n; last read: '\"<U+000A>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x0b\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000B>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x0b\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+000B (VT) must be escaped to \\u000B; last read: '\"<U+000B>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x0c\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000C>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x0c\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+000C (FF) must be escaped to \\u000C or \\f; last read: '\"<U+000C>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x0d\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000D>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x0d\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+000D (CR) must be escaped to \\u000D or \\r; last read: '\"<U+000D>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x0e\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000E>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x0e\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+000E (SO) must be escaped to \\u000E; last read: '\"<U+000E>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x0f\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+000F>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x0f\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+000F (SI) must be escaped to \\u000F; last read: '\"<U+000F>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x10\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0010>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x10\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0010 (DLE) must be escaped to \\u0010; last read: '\"<U+0010>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x11\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0011>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x11\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0011 (DC1) must be escaped to \\u0011; last read: '\"<U+0011>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x12\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0012>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x12\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0012 (DC2) must be escaped to \\u0012; last read: '\"<U+0012>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x13\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0013>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x13\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0013 (DC3) must be escaped to \\u0013; last read: '\"<U+0013>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x14\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0014>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x14\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0014 (DC4) must be escaped to \\u0014; last read: '\"<U+0014>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x15\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0015>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x15\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0015 (NAK) must be escaped to \\u0015; last read: '\"<U+0015>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x16\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0016>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x16\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0016 (SYN) must be escaped to \\u0016; last read: '\"<U+0016>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x17\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0017>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x17\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0017 (ETB) must be escaped to \\u0017; last read: '\"<U+0017>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x18\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0018>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x18\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0018 (CAN) must be escaped to \\u0018; last read: '\"<U+0018>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x19\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0019>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x19\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0019 (EM) must be escaped to \\u0019; last read: '\"<U+0019>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x1a\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+001A>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x1a\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+001A (SUB) must be escaped to \\u001A; last read: '\"<U+001A>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x1b\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+001B>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x1b\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+001B (ESC) must be escaped to \\u001B; last read: '\"<U+001B>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x1c\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+001C>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x1c\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+001C (FS) must be escaped to \\u001C; last read: '\"<U+001C>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x1d\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+001D>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x1d\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+001D (GS) must be escaped to \\u001D; last read: '\"<U+001D>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x1e\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+001E>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x1e\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+001E (RS) must be escaped to \\u001E; last read: '\"<U+001E>'");
-                CHECK_THROWS_WITH(parser_helper("\"\x1f\""), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+001F>'");
+                CHECK_THROWS_WITH(parser_helper("\"\x1f\""), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+001F (US) must be escaped to \\u001F; last read: '\"<U+001F>'");
                SECTION("additional test for null byte")
                {
@ -403,7 +403,7 @@ TEST_CASE("parser class")
                    std::string s = "\"1\"";
                    s[1] = '\0';
                    CHECK_THROWS_AS(json::parse(s.begin(), s.end()), json::parse_error&);
-                    CHECK_THROWS_WITH(json::parse(s.begin(), s.end()), "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: control character must be escaped; last read: '\"<U+0000>'");
+                    CHECK_THROWS_WITH(json::parse(s.begin(), s.end()), "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: control character U+0000 (NUL) must be escaped to \\u0000; last read: '\"<U+0000>'");
                }
            }
@ -603,39 +603,39 @@ TEST_CASE("parser class")
                CHECK_THROWS_AS(parser_helper("+0"), json::parse_error&);
                CHECK_THROWS_WITH(parser_helper("01"),
-                                  "[json.exception.parse_error.101] parse error at 2: syntax error - unexpected number literal; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - unexpected number literal; expected end of input");
                CHECK_THROWS_WITH(parser_helper("-01"),
-                                  "[json.exception.parse_error.101] parse error at 3: syntax error - unexpected number literal; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - unexpected number literal; expected end of input");
                CHECK_THROWS_WITH(parser_helper("--1"),
-                                  "[json.exception.parse_error.101] parse error at 2: syntax error - invalid number; expected digit after '-'; last read: '--'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid number; expected digit after '-'; last read: '--'");
                CHECK_THROWS_WITH(parser_helper("1."),
-                                  "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected digit after '.'; last read: '1.'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected digit after '.'; last read: '1.'");
                CHECK_THROWS_WITH(parser_helper("1E"),
-                                  "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1E'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1E'");
                CHECK_THROWS_WITH(parser_helper("1E-"),
-                                  "[json.exception.parse_error.101] parse error at 4: syntax error - invalid number; expected digit after exponent sign; last read: '1E-'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid number; expected digit after exponent sign; last read: '1E-'");
                CHECK_THROWS_WITH(parser_helper("1.E1"),
-                                  "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected digit after '.'; last read: '1.E'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected digit after '.'; last read: '1.E'");
                CHECK_THROWS_WITH(parser_helper("-1E"),
-                                  "[json.exception.parse_error.101] parse error at 4: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '-1E'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '-1E'");
                CHECK_THROWS_WITH(parser_helper("-0E#"),
-                                  "[json.exception.parse_error.101] parse error at 4: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '-0E#'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '-0E#'");
                CHECK_THROWS_WITH(parser_helper("-0E-#"),
-                                  "[json.exception.parse_error.101] parse error at 5: syntax error - invalid number; expected digit after exponent sign; last read: '-0E-#'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid number; expected digit after exponent sign; last read: '-0E-#'");
                CHECK_THROWS_WITH(parser_helper("-0#"),
-                                  "[json.exception.parse_error.101] parse error at 3: syntax error - invalid literal; last read: '-0#'; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid literal; last read: '-0#'; expected end of input");
                CHECK_THROWS_WITH(parser_helper("-0.0:"),
-                                  "[json.exception.parse_error.101] parse error at 5: syntax error - unexpected ':'; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - unexpected ':'; expected end of input");
                CHECK_THROWS_WITH(parser_helper("-0.0Z"),
-                                  "[json.exception.parse_error.101] parse error at 5: syntax error - invalid literal; last read: '-0.0Z'; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid literal; last read: '-0.0Z'; expected end of input");
                CHECK_THROWS_WITH(parser_helper("-0E123:"),
-                                  "[json.exception.parse_error.101] parse error at 7: syntax error - unexpected ':'; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 7: syntax error while parsing value - unexpected ':'; expected end of input");
                CHECK_THROWS_WITH(parser_helper("-0e0-:"),
-                                  "[json.exception.parse_error.101] parse error at 6: syntax error - invalid number; expected digit after '-'; last read: '-:'; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 6: syntax error while parsing value - invalid number; expected digit after '-'; last read: '-:'; expected end of input");
                CHECK_THROWS_WITH(parser_helper("-0e-:"),
-                                  "[json.exception.parse_error.101] parse error at 5: syntax error - invalid number; expected digit after exponent sign; last read: '-0e-:'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid number; expected digit after exponent sign; last read: '-0e-:'");
                CHECK_THROWS_WITH(parser_helper("-0f"),
-                                  "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: '-0f'; expected end of input");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: '-0f'; expected end of input");
            }
        }
    }
@ -920,33 +920,33 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("1E/"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("1E:"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("0."),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected digit after '.'; last read: '0.'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected digit after '.'; last read: '0.'");
        CHECK_THROWS_WITH(parser_helper("-"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid number; expected digit after '-'; last read: '-'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid number; expected digit after '-'; last read: '-'");
        CHECK_THROWS_WITH(parser_helper("--"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid number; expected digit after '-'; last read: '--'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid number; expected digit after '-'; last read: '--'");
        CHECK_THROWS_WITH(parser_helper("-0."),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid number; expected digit after '.'; last read: '-0.'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid number; expected digit after '.'; last read: '-0.'");
        CHECK_THROWS_WITH(parser_helper("-."),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid number; expected digit after '-'; last read: '-.'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid number; expected digit after '-'; last read: '-.'");
        CHECK_THROWS_WITH(parser_helper("-:"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid number; expected digit after '-'; last read: '-:'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid number; expected digit after '-'; last read: '-:'");
        CHECK_THROWS_WITH(parser_helper("0.:"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected digit after '.'; last read: '0.:'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected digit after '.'; last read: '0.:'");
        CHECK_THROWS_WITH(parser_helper("e."),
-                          "[json.exception.parse_error.101] parse error at 1: syntax error - invalid literal; last read: 'e'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'e'");
        CHECK_THROWS_WITH(parser_helper("1e."),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1e.'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1e.'");
        CHECK_THROWS_WITH(parser_helper("1e/"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1e/'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1e/'");
        CHECK_THROWS_WITH(parser_helper("1e:"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1e:'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1e:'");
        CHECK_THROWS_WITH(parser_helper("1E."),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1E.'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1E.'");
        CHECK_THROWS_WITH(parser_helper("1E/"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1E/'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1E/'");
        CHECK_THROWS_WITH(parser_helper("1E:"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid number; expected '+', '-', or digit after exponent; last read: '1E:'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid number; expected '+', '-', or digit after exponent; last read: '1E:'");
        // unexpected end of null
        CHECK_THROWS_AS(parser_helper("n"), json::parse_error&);
@ -955,15 +955,15 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("nulk"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("nulm"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("n"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid literal; last read: 'n'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid literal; last read: 'n'");
        CHECK_THROWS_WITH(parser_helper("nu"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid literal; last read: 'nu'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid literal; last read: 'nu'");
        CHECK_THROWS_WITH(parser_helper("nul"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'nul'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'nul'");
        CHECK_THROWS_WITH(parser_helper("nulk"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'nulk'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'nulk'");
        CHECK_THROWS_WITH(parser_helper("nulm"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'nulm'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'nulm'");
        // unexpected end of true
        CHECK_THROWS_AS(parser_helper("t"), json::parse_error&);
@ -972,15 +972,15 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("trud"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("truf"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("t"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid literal; last read: 't'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid literal; last read: 't'");
        CHECK_THROWS_WITH(parser_helper("tr"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid literal; last read: 'tr'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid literal; last read: 'tr'");
        CHECK_THROWS_WITH(parser_helper("tru"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'tru'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'tru'");
        CHECK_THROWS_WITH(parser_helper("trud"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'trud'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'trud'");
        CHECK_THROWS_WITH(parser_helper("truf"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'truf'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'truf'");
        // unexpected end of false
        CHECK_THROWS_AS(parser_helper("f"), json::parse_error&);
@ -990,17 +990,17 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("falsd"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("falsf"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("f"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid literal; last read: 'f'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid literal; last read: 'f'");
        CHECK_THROWS_WITH(parser_helper("fa"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid literal; last read: 'fa'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid literal; last read: 'fa'");
        CHECK_THROWS_WITH(parser_helper("fal"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid literal; last read: 'fal'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid literal; last read: 'fal'");
        CHECK_THROWS_WITH(parser_helper("fals"),
-                          "[json.exception.parse_error.101] parse error at 5: syntax error - invalid literal; last read: 'fals'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid literal; last read: 'fals'");
        CHECK_THROWS_WITH(parser_helper("falsd"),
-                          "[json.exception.parse_error.101] parse error at 5: syntax error - invalid literal; last read: 'falsd'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid literal; last read: 'falsd'");
        CHECK_THROWS_WITH(parser_helper("falsf"),
-                          "[json.exception.parse_error.101] parse error at 5: syntax error - invalid literal; last read: 'falsf'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid literal; last read: 'falsf'");
        // missing/unexpected end of array
        CHECK_THROWS_AS(parser_helper("["), json::parse_error&);
@ -1009,15 +1009,15 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("[1,]"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("]"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("["),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal");
        CHECK_THROWS_WITH(parser_helper("[1"),
-                          "[json.exception.parse_error.101] parse error at 3: syntax error - unexpected end of input; expected ']'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing array - unexpected end of input; expected ']'");
        CHECK_THROWS_WITH(parser_helper("[1,"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal");
        CHECK_THROWS_WITH(parser_helper("[1,]"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - unexpected ']'; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - unexpected ']'; expected '[', '{', or a literal");
        CHECK_THROWS_WITH(parser_helper("]"),
-                          "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected ']'; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected ']'; expected '[', '{', or a literal");
        // missing/unexpected end of object
        CHECK_THROWS_AS(parser_helper("{"), json::parse_error&);
@ -1027,17 +1027,17 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("{\"foo\":1,}"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("}"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("{"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - unexpected end of input; expected string literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing object key - unexpected end of input; expected string literal");
        CHECK_THROWS_WITH(parser_helper("{\"foo\""),
-                          "[json.exception.parse_error.101] parse error at 7: syntax error - unexpected end of input; expected ':'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 7: syntax error while parsing object separator - unexpected end of input; expected ':'");
        CHECK_THROWS_WITH(parser_helper("{\"foo\":"),
-                          "[json.exception.parse_error.101] parse error at 8: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 8: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal");
        CHECK_THROWS_WITH(parser_helper("{\"foo\":}"),
-                          "[json.exception.parse_error.101] parse error at 8: syntax error - unexpected '}'; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 8: syntax error while parsing value - unexpected '}'; expected '[', '{', or a literal");
        CHECK_THROWS_WITH(parser_helper("{\"foo\":1,}"),
-                          "[json.exception.parse_error.101] parse error at 10: syntax error - unexpected '}'; expected string literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 10: syntax error while parsing object key - unexpected '}'; expected string literal");
        CHECK_THROWS_WITH(parser_helper("}"),
-                          "[json.exception.parse_error.101] parse error at 1: syntax error - unexpected '}'; expected '[', '{', or a literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected '}'; expected '[', '{', or a literal");
        // missing/unexpected end of string
        CHECK_THROWS_AS(parser_helper("\""), json::parse_error&);
@ -1051,25 +1051,25 @@ TEST_CASE("parser class")
        CHECK_THROWS_AS(parser_helper("\"\\u01"), json::parse_error&);
        CHECK_THROWS_AS(parser_helper("\"\\u012"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("\""),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - invalid string: missing closing quote; last read: '\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - invalid string: missing closing quote; last read: '\"'");
        CHECK_THROWS_WITH(parser_helper("\"\\\""),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid string: missing closing quote; last read: '\"\\\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid string: missing closing quote; last read: '\"\\\"'");
        CHECK_THROWS_WITH(parser_helper("\"\\u\""),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u\"'");
        CHECK_THROWS_WITH(parser_helper("\"\\u0\""),
-                          "[json.exception.parse_error.101] parse error at 5: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u0\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u0\"'");
        CHECK_THROWS_WITH(parser_helper("\"\\u01\""),
-                          "[json.exception.parse_error.101] parse error at 6: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u01\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 6: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u01\"'");
        CHECK_THROWS_WITH(parser_helper("\"\\u012\""),
-                          "[json.exception.parse_error.101] parse error at 7: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u012\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 7: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u012\"'");
        CHECK_THROWS_WITH(parser_helper("\"\\u"),
-                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u'");
        CHECK_THROWS_WITH(parser_helper("\"\\u0"),
-                          "[json.exception.parse_error.101] parse error at 5: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u0'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u0'");
        CHECK_THROWS_WITH(parser_helper("\"\\u01"),
-                          "[json.exception.parse_error.101] parse error at 6: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u01'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 6: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u01'");
        CHECK_THROWS_WITH(parser_helper("\"\\u012"),
-                          "[json.exception.parse_error.101] parse error at 7: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u012'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 7: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '\"\\u012'");
        // invalid escapes
        for (int c = 1; c < 128; ++c)
@ -1106,7 +1106,7 @@ TEST_CASE("parser class")
                    if (c > 0x1f)
                    {
                        CHECK_THROWS_WITH(parser_helper(s.c_str()),
-                                          "[json.exception.parse_error.101] parse error at 3: syntax error - invalid string: forbidden character after backslash; last read: '\"\\" + std::string(1, static_cast<char>(c)) + "'");
+                                          "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - invalid string: forbidden character after backslash; last read: '\"\\" + std::string(1, static_cast<char>(c)) + "'");
                    }
                    break;
                }
@ -1182,7 +1182,7 @@ TEST_CASE("parser class")
                    if (c > 0x1f)
                    {
                        CHECK_THROWS_WITH(parser_helper(s1.c_str()),
-                                          "[json.exception.parse_error.101] parse error at 7: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s1.substr(0, 7) + "'");
+                                          "[json.exception.parse_error.101] parse error at line 1, column 7: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s1.substr(0, 7) + "'");
                    }
                    CAPTURE(s2);
@ -1191,7 +1191,7 @@ TEST_CASE("parser class")
                    if (c > 0x1f)
                    {
                        CHECK_THROWS_WITH(parser_helper(s2.c_str()),
-                                          "[json.exception.parse_error.101] parse error at 6: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s2.substr(0, 6) + "'");
+                                          "[json.exception.parse_error.101] parse error at line 1, column 6: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s2.substr(0, 6) + "'");
                    }
                    CAPTURE(s3);
@ -1200,7 +1200,7 @@ TEST_CASE("parser class")
                    if (c > 0x1f)
                    {
                        CHECK_THROWS_WITH(parser_helper(s3.c_str()),
-                                          "[json.exception.parse_error.101] parse error at 5: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s3.substr(0, 5) + "'");
+                                          "[json.exception.parse_error.101] parse error at line 1, column 5: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s3.substr(0, 5) + "'");
                    }
                    CAPTURE(s4);
@ -1209,7 +1209,7 @@ TEST_CASE("parser class")
                    if (c > 0x1f)
                    {
                        CHECK_THROWS_WITH(parser_helper(s4.c_str()),
-                                          "[json.exception.parse_error.101] parse error at 4: syntax error - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s4.substr(0, 4) + "'");
+                                          "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid string: '\\u' must be followed by 4 hex digits; last read: '" + s4.substr(0, 4) + "'");
                    }
                }
            }
@ -1218,17 +1218,17 @@ TEST_CASE("parser class")
        // missing part of a surrogate pair
        CHECK_THROWS_AS(json::parse("\"\\uD80C\""), json::parse_error&);
        CHECK_THROWS_WITH(json::parse("\"\\uD80C\""),
-                          "[json.exception.parse_error.101] parse error at 8: syntax error - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\"'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 8: syntax error while parsing value - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\"'");
        // invalid surrogate pair
        CHECK_THROWS_AS(json::parse("\"\\uD80C\\uD80C\""), json::parse_error&);
        CHECK_THROWS_AS(json::parse("\"\\uD80C\\u0000\""), json::parse_error&);
        CHECK_THROWS_AS(json::parse("\"\\uD80C\\uFFFF\""), json::parse_error&);
        CHECK_THROWS_WITH(json::parse("\"\\uD80C\\uD80C\""),
-                          "[json.exception.parse_error.101] parse error at 13: syntax error - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\\uD80C'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 13: syntax error while parsing value - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\\uD80C'");
        CHECK_THROWS_WITH(json::parse("\"\\uD80C\\u0000\""),
-                          "[json.exception.parse_error.101] parse error at 13: syntax error - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\\u0000'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 13: syntax error while parsing value - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\\u0000'");
        CHECK_THROWS_WITH(json::parse("\"\\uD80C\\uFFFF\""),
-                          "[json.exception.parse_error.101] parse error at 13: syntax error - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\\uFFFF'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 13: syntax error while parsing value - invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF; last read: '\"\\uD80C\\uFFFF'");
    }
    SECTION("parse errors (accept)")
@ -1292,6 +1292,9 @@ TEST_CASE("parser class")
        CHECK(accept_helper("\"\\u01") == false);
        CHECK(accept_helper("\"\\u012") == false);
        // unget of newline
        CHECK(parser_helper("\n123\n") == 123);
        // invalid escapes
        for (int c = 1; c < 128; ++c)
        {
@ -1419,11 +1422,11 @@ TEST_CASE("parser class")
        // test case to make sure no comma preceeds the first key
        CHECK_THROWS_AS(parser_helper("{,\"key\": false}"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("{,\"key\": false}"),
-                          "[json.exception.parse_error.101] parse error at 2: syntax error - unexpected ','; expected string literal");
+                          "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing object key - unexpected ','; expected string literal");
        // test case to make sure an object is properly closed
        CHECK_THROWS_AS(parser_helper("[{\"key\": false true]"), json::parse_error&);
        CHECK_THROWS_WITH(parser_helper("[{\"key\": false true]"),
-                          "[json.exception.parse_error.101] parse error at 19: syntax error - unexpected true literal; expected '}'");
+                          "[json.exception.parse_error.101] parse error at line 1, column 19: syntax error while parsing object - unexpected true literal; expected '}'");
        // test case to make sure the callback is properly evaluated after reading a key
        {
@ -1674,7 +1677,7 @@ TEST_CASE("parser class")
            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 '}'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 13: syntax error while parsing object - unexpected ':'; expected '}'");
            CHECK_THROWS_AS(json::parse("1.18973e+4932", cb), json::out_of_range&);
            CHECK_THROWS_WITH(json::parse("1.18973e+4932", cb),
--- a/test/src/unit-comparison.cpp
+++ b/test/src/unit-comparison.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-concepts.cpp
+++ b/test/src/unit-concepts.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-constructor1.cpp
+++ b/test/src/unit-constructor1.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-constructor2.cpp
+++ b/test/src/unit-constructor2.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-convenience.cpp
+++ b/test/src/unit-convenience.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-conversions.cpp
+++ b/test/src/unit-conversions.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-deserialization.cpp
+++ b/test/src/unit-deserialization.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -267,7 +267,7 @@ TEST_CASE("deserialization")
            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 ']'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 29: syntax error while parsing array - unexpected end of input; expected ']'");
            CHECK(not json::accept(ss3));
            json j_error;
@ -291,7 +291,7 @@ TEST_CASE("deserialization")
            json::string_t s = "[\"foo\",1,2,3,false,{\"one\":1}";
            CHECK_THROWS_AS(json::parse(s), json::parse_error&);
            CHECK_THROWS_WITH(json::parse(s),
-                              "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 29: syntax error while parsing array - unexpected end of input; expected ']'");
            CHECK(not json::accept(s));
            json j_error;
@ -318,7 +318,7 @@ TEST_CASE("deserialization")
            json j;
            CHECK_THROWS_AS(j << ss1, json::parse_error&);
            CHECK_THROWS_WITH(j << ss2,
-                              "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 29: syntax error while parsing array - unexpected end of input; expected ']'");
        }
        SECTION("operator>>")
@ -329,14 +329,14 @@ TEST_CASE("deserialization")
            json j;
            CHECK_THROWS_AS(ss1 >> j, json::parse_error&);
            CHECK_THROWS_WITH(ss2 >> j,
-                              "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 29: syntax error while parsing array - unexpected end of input; expected ']'");
        }
        SECTION("user-defined string literal")
        {
            CHECK_THROWS_AS("[\"foo\",1,2,3,false,{\"one\":1}"_json, json::parse_error&);
            CHECK_THROWS_WITH("[\"foo\",1,2,3,false,{\"one\":1}"_json,
-                              "[json.exception.parse_error.101] parse error at 29: syntax error - unexpected end of input; expected ']'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 29: syntax error while parsing array - unexpected end of input; expected ']'");
        }
    }
@ -612,7 +612,7 @@ TEST_CASE("deserialization")
                uint8_t v[] = {'\"', 0x7F, 0xDF, 0x7F};
                CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error&);
                CHECK_THROWS_WITH(json::parse(std::begin(v), std::end(v)),
-                                  "[json.exception.parse_error.101] parse error at 4: syntax error - invalid string: ill-formed UTF-8 byte; last read: '\"\x7f\xdf\x7f'");
+                                  "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - invalid string: ill-formed UTF-8 byte; last read: '\"\x7f\xdf\x7f'");
                CHECK(not json::accept(std::begin(v), std::end(v)));
                json j_error;
@ -799,11 +799,11 @@ 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 4: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                              "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - 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 4: syntax error - unexpected end of input; expected '[', '{', or a literal");
+                              "[json.exception.parse_error.101] parse error at line 1, column 4: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal");
            SaxEventLogger l;
            CHECK(not json::sax_parse(bom, &l));
@ -838,11 +838,11 @@ TEST_CASE("deserialization")
        {
            CHECK_THROWS_AS(json::parse(bom.substr(0, 2)), json::parse_error&);
            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'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - 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.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'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 3: syntax error while parsing value - 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));
@ -863,11 +863,11 @@ TEST_CASE("deserialization")
        {
            CHECK_THROWS_AS(json::parse(bom.substr(0, 1)), json::parse_error&);
            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'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - 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.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'");
+                              "[json.exception.parse_error.101] parse error at line 1, column 2: syntax error while parsing value - 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));
--- a/test/src/unit-element_access1.cpp
+++ b/test/src/unit-element_access1.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -195,7 +195,7 @@ TEST_CASE("element access 1")
                        const json j_nonarray_const(j_nonarray);
                        CHECK_NOTHROW(j_nonarray[0]);
                        CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                        CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with null");
+                        CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with null");
                    }
                    SECTION("implicit transformation to properly filled array")
@ -212,8 +212,8 @@ TEST_CASE("element access 1")
                    const json j_nonarray_const(j_nonarray);
                    CHECK_THROWS_AS(j_nonarray[0], json::type_error&);
                    CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with boolean");
+                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with boolean");
-                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with boolean");
+                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with boolean");
                }
                SECTION("string")
@ -222,8 +222,8 @@ TEST_CASE("element access 1")
                    const json j_nonarray_const(j_nonarray);
                    CHECK_THROWS_AS(j_nonarray[0], json::type_error&);
                    CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with string");
+                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with string");
-                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with string");
+                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with string");
                }
                SECTION("object")
@ -232,8 +232,8 @@ TEST_CASE("element access 1")
                    const json j_nonarray_const(j_nonarray);
                    CHECK_THROWS_AS(j_nonarray[0], json::type_error&);
                    CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with object");
+                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with object");
-                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with object");
+                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with object");
                }
                SECTION("number (integer)")
@ -242,8 +242,8 @@ TEST_CASE("element access 1")
                    const json j_nonarray_const(j_nonarray);
                    CHECK_THROWS_AS(j_nonarray[0], json::type_error&);
                    CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with number");
+                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with number");
-                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with number");
+                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with number");
                }
                SECTION("number (unsigned)")
@ -252,8 +252,8 @@ TEST_CASE("element access 1")
                    const json j_nonarray_const(j_nonarray);
                    CHECK_THROWS_AS(j_nonarray[0], json::type_error&);
                    CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with number");
+                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with number");
-                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with number");
+                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with number");
                }
                SECTION("number (floating-point)")
@ -262,8 +262,8 @@ TEST_CASE("element access 1")
                    const json j_nonarray_const(j_nonarray);
                    CHECK_THROWS_AS(j_nonarray[0], json::type_error&);
                    CHECK_THROWS_AS(j_nonarray_const[0], json::type_error&);
-                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with number");
+                    CHECK_THROWS_WITH(j_nonarray[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with number");
-                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with number");
+                    CHECK_THROWS_WITH(j_nonarray_const[0], "[json.exception.type_error.305] cannot use operator[] with a numeric argument with number");
                }
            }
        }
--- a/test/src/unit-element_access2.cpp
+++ b/test/src/unit-element_access2.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -475,9 +475,9 @@ TEST_CASE("element access 2")
                    CHECK_NOTHROW(j_nonobject2[json::object_t::key_type("foo")]);
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
-                    CHECK_THROWS_WITH(j_const_nonobject["foo"], "[json.exception.type_error.305] cannot use operator[] with null");
+                    CHECK_THROWS_WITH(j_const_nonobject["foo"], "[json.exception.type_error.305] cannot use operator[] with a string argument with null");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with null");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with null");
                }
                SECTION("boolean")
@ -489,13 +489,13 @@ TEST_CASE("element access 2")
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
                    CHECK_THROWS_WITH(j_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with boolean");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with boolean");
                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with boolean");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with boolean");
                    CHECK_THROWS_WITH(j_const_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with boolean");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with boolean");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with boolean");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with boolean");
                }
                SECTION("string")
@ -507,13 +507,13 @@ TEST_CASE("element access 2")
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
                    CHECK_THROWS_WITH(j_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with string");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with string");
                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with string");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with string");
                    CHECK_THROWS_WITH(j_const_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with string");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with string");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with string");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with string");
                }
                SECTION("array")
@ -525,12 +525,12 @@ TEST_CASE("element access 2")
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
                    CHECK_THROWS_WITH(j_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with array");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with array");
-                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")], "[json.exception.type_error.305] cannot use operator[] with array");
+                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")], "[json.exception.type_error.305] cannot use operator[] with a string argument with array");
                    CHECK_THROWS_WITH(j_const_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with array");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with array");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with array");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with array");
                }
                SECTION("number (integer)")
@ -542,13 +542,13 @@ TEST_CASE("element access 2")
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
                    CHECK_THROWS_WITH(j_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_const_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                }
                SECTION("number (unsigned)")
@ -560,13 +560,13 @@ TEST_CASE("element access 2")
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
                    CHECK_THROWS_WITH(j_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_const_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                }
                SECTION("number (floating-point)")
@ -578,13 +578,13 @@ TEST_CASE("element access 2")
                    CHECK_THROWS_AS(j_const_nonobject["foo"], json::type_error&);
                    CHECK_THROWS_AS(j_const_nonobject[json::object_t::key_type("foo")], json::type_error&);
                    CHECK_THROWS_WITH(j_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_const_nonobject["foo"],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                    CHECK_THROWS_WITH(j_const_nonobject[json::object_t::key_type("foo")],
-                                      "[json.exception.type_error.305] cannot use operator[] with number");
+                                      "[json.exception.type_error.305] cannot use operator[] with a string argument with number");
                }
            }
        }
--- a/test/src/unit-inspection.cpp
+++ b/test/src/unit-inspection.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-items.cpp
+++ b/test/src/unit-items.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-iterators1.cpp
+++ b/test/src/unit-iterators1.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-iterators2.cpp
+++ b/test/src/unit-iterators2.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-json_patch.cpp
+++ b/test/src/unit-json_patch.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -63,7 +63,7 @@ TEST_CASE("JSON patch")
            // is not an error, because "a" exists, and "b" will be added to
            // its value.
            CHECK_NOTHROW(doc1.patch(patch));
-            CHECK(doc1.patch(patch) == R"(
+            auto doc1_ans = R"(
                {
                    "a": {
                        "foo": 1,
@ -72,7 +72,8 @@ TEST_CASE("JSON patch")
                        }
                    }
                }
-            )"_json);
+            )"_json;
            CHECK(doc1.patch(patch) == doc1_ans);
            // It is an error in this document:
            json doc2 = R"({ "q": { "bar": 2 } })"_json;
--- a/test/src/unit-json_pointer.cpp
+++ b/test/src/unit-json_pointer.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -39,7 +39,7 @@ TEST_CASE("JSON pointers")
    {
        CHECK_THROWS_AS(json::json_pointer("foo"), json::parse_error&);
        CHECK_THROWS_WITH(json::json_pointer("foo"),
-                          "[json.exception.parse_error.107] parse error at 1: JSON pointer must be empty or begin with '/' - was: 'foo'");
+                          "[json.exception.parse_error.107] parse error at byte 1: JSON pointer must be empty or begin with '/' - was: 'foo'");
        CHECK_THROWS_AS(json::json_pointer("/~~"), json::parse_error&);
        CHECK_THROWS_WITH(json::json_pointer("/~~"),
--- a/test/src/unit-merge_patch.cpp
+++ b/test/src/unit-merge_patch.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-meta.cpp
+++ b/test/src/unit-meta.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -43,9 +43,9 @@ TEST_CASE("version information")
        CHECK(j["url"] == "https://github.com/nlohmann/json");
        CHECK(j["version"] == json(
        {
-            {"string", "3.2.0"},
+            {"string", "3.3.0"},
            {"major", 3},
-            {"minor", 2},
+            {"minor", 3},
            {"patch", 0}
        }));
--- a/test/src/unit-modifiers.cpp
+++ b/test/src/unit-modifiers.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-msgpack.cpp
+++ b/test/src/unit-msgpack.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -1124,7 +1124,7 @@ 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");
+                              "[json.exception.parse_error.110] parse error at byte 1: syntax error while parsing MessagePack value: unexpected end of input");
            CHECK(json::from_msgpack(std::vector<uint8_t>(), true, false).is_discarded());
        }
@ -1151,43 +1151,43 @@ TEST_CASE("MessagePack")
            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");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing MessagePack string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcd})),
-                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcd, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xce})),
-                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xce, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xce, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xce, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 5: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf})),
-                              "[json.exception.parse_error.110] parse error at 2: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 3: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 4: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 5: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 5: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 6: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 6: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 7: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 7: syntax error while parsing MessagePack number: unexpected end of input");
            CHECK_THROWS_WITH(json::from_msgpack(std::vector<uint8_t>({0xcf, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})),
-                              "[json.exception.parse_error.110] parse error at 8: unexpected end of input");
+                              "[json.exception.parse_error.110] parse error at byte 8: syntax error while parsing MessagePack number: 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");
+                              "[json.exception.parse_error.110] parse error at byte 9: syntax error while parsing MessagePack number: 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");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing MessagePack string: 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");
+                              "[json.exception.parse_error.110] parse error at byte 3: syntax error while parsing MessagePack value: 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");
+                              "[json.exception.parse_error.110] parse error at byte 4: syntax error while parsing MessagePack value: 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());
@ -1216,12 +1216,12 @@ 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");
+                                  "[json.exception.parse_error.112] parse error at byte 1: syntax error while parsing MessagePack value: invalid 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");
+                                  "[json.exception.parse_error.112] parse error at byte 1: syntax error while parsing MessagePack value: invalid byte: 0xC6");
                CHECK(json::from_msgpack(std::vector<uint8_t>({0xc6}), true, false).is_discarded());
            }
@ -1249,7 +1249,7 @@ 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");
+                              "[json.exception.parse_error.113] parse error at byte 2: syntax error while parsing MessagePack string: expected length specification (0xA0-0xBF, 0xD9-0xDB); last byte: 0xFF");
            CHECK(json::from_msgpack(std::vector<uint8_t>({0x81, 0xff, 0x01}), true, false).is_discarded());
        }
@ -1266,7 +1266,7 @@ 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");
+                                  "[json.exception.parse_error.110] parse error at byte 2: syntax error while parsing MessagePack value: expected end of input; last byte: 0xC0");
                CHECK(json::from_msgpack(vec, true, false).is_discarded());
            }
        }
--- a/test/src/unit-noexcept.cpp
+++ b/test/src/unit-noexcept.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-pointer_access.cpp
+++ b/test/src/unit-pointer_access.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/test/src/unit-readme.cpp
+++ b/test/src/unit-readme.cpp
@ -1,7 +1,7 @@
 /*
    __ _____ _____ _____
 __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.2.0
+|  |  |__   |  |  | | | |  version 3.3.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
--- a/Show more
+++ b/Show more
		`@ -1 +1 @@`
			`<a target="_blank" href="https://wandbox.org/permlink/VexEaSCbbvOOXsPt"><b>online</b></a>`				`<a target="_blank" href="https://wandbox.org/permlink/RWX63GizBsDZ5EnQ"><b>online</b></a>`
		`@ -0,0 +1 @@`
							`<a target="_blank" href="https://wandbox.org/permlink/QxtxaO6JZAMJPutC"><b>online</b></a>`