🚨 fixed warnings

include/nlohmann/detail/conversions/to_json.hpp

@@ -10,10 +10,10 @@
 #include <valarray> // valarray
 #include <vector> // vector
 
+#include <nlohmann/detail/iterators/iteration_proxy.hpp>
 #include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/meta/type_traits.hpp>
 #include <nlohmann/detail/value_t.hpp>
-#include <nlohmann/detail/iterators/iteration_proxy.hpp>
 
 namespace nlohmann
 {

include/nlohmann/detail/exceptions.hpp

@@ -102,12 +102,12 @@ json.exception.parse_error.114 | parse error: Unsupported BSON record type 0x0F
 @liveexample{The following code shows how a `parse_error` exception can be
 caught.,parse_error}
 
-@sa @ref exception for the base class of the library exceptions
+@sa - @ref exception for the base class of the library exceptions
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref type_error for exceptions indicating executing a member function with
+@sa - @ref type_error for exceptions indicating executing a member function with
                     a wrong type
-@sa @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
-@sa @ref other_error for exceptions indicating other library errors
+@sa - @ref other_error for exceptions indicating other library errors
 
 @since version 3.0.0
 */
@@ -117,7 +117,7 @@ class parse_error : public exception
     /*!
     @brief create a parse error exception
     @param[in] id_       the id of the exception
-    @param[in] position  the position where the error occurred (or with
+    @param[in] pos       the position where the error occurred (or with
                          chars_read_total=0 if the position cannot be
                          determined)
     @param[in] what_arg  the explanatory string
@@ -188,12 +188,12 @@ json.exception.invalid_iterator.214 | cannot get value | Cannot get value for it
 @liveexample{The following code shows how an `invalid_iterator` exception can be
 caught.,invalid_iterator}
 
-@sa @ref exception for the base class of the library exceptions
+@sa - @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
+@sa - @ref parse_error for exceptions indicating a parse error
-@sa @ref type_error for exceptions indicating executing a member function with
+@sa - @ref type_error for exceptions indicating executing a member function with
                     a wrong type
-@sa @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
-@sa @ref other_error for exceptions indicating other library errors
+@sa - @ref other_error for exceptions indicating other library errors
 
 @since version 3.0.0
 */
@@ -242,11 +242,11 @@ json.exception.type_error.317 | JSON value cannot be serialized to requested for
 @liveexample{The following code shows how a `type_error` exception can be
 caught.,type_error}
 
-@sa @ref exception for the base class of the library exceptions
+@sa - @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
+@sa - @ref parse_error for exceptions indicating a parse error
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
-@sa @ref other_error for exceptions indicating other library errors
+@sa - @ref other_error for exceptions indicating other library errors
 
 @since version 3.0.0
 */
@@ -287,12 +287,12 @@ json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 (at
 @liveexample{The following code shows how an `out_of_range` exception can be
 caught.,out_of_range}
 
-@sa @ref exception for the base class of the library exceptions
+@sa - @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
+@sa - @ref parse_error for exceptions indicating a parse error
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref type_error for exceptions indicating executing a member function with
+@sa - @ref type_error for exceptions indicating executing a member function with
                     a wrong type
-@sa @ref other_error for exceptions indicating other library errors
+@sa - @ref other_error for exceptions indicating other library errors
 
 @since version 3.0.0
 */
@@ -321,12 +321,12 @@ name / id                      | example message | description
 ------------------------------ | --------------- | -------------------------
 json.exception.other_error.501 | unsuccessful: {"op":"test","path":"/baz", "value":"bar"} | A JSON Patch operation 'test' failed. The unsuccessful operation is also printed.
 
-@sa @ref exception for the base class of the library exceptions
+@sa - @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
+@sa - @ref parse_error for exceptions indicating a parse error
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref type_error for exceptions indicating executing a member function with
+@sa - @ref type_error for exceptions indicating executing a member function with
                     a wrong type
-@sa @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
 
 @liveexample{The following code shows how an `other_error` exception can be
 caught.,other_error}

include/nlohmann/detail/input/binary_reader.hpp

@@ -13,9 +13,9 @@
 #include <string> // char_traits, string
 #include <utility> // make_pair, move
 
+#include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
 #include <nlohmann/detail/input/json_sax.hpp>
-#include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/meta/is_sax.hpp>
 #include <nlohmann/detail/value_t.hpp>
@@ -52,6 +52,13 @@ class binary_reader
         assert(ia);
     }
 
+    // make class move-only
+    binary_reader(const binary_reader&) = delete;
+    binary_reader(binary_reader&&) noexcept = default;
+    binary_reader& operator=(const binary_reader&) = delete;
+    binary_reader& operator=(binary_reader&&) noexcept = default;
+    ~binary_reader() = default;
+
     /*!
     @param[in] format  the binary format to parse
     @param[in] sax_    a SAX event processor

include/nlohmann/detail/input/input_adapters.hpp

@@ -3,6 +3,7 @@
 #include <array> // array
 #include <cassert> // assert
 #include <cstddef> // size_t
+#include <cstdio> //FILE *
 #include <cstring> // strlen
 #include <istream> // istream
 #include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
@@ -11,7 +12,6 @@
 #include <string> // string, char_traits
 #include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
 #include <utility> // pair, declval
-#include <cstdio> //FILE *
 
 #include <nlohmann/detail/iterators/iterator_traits.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
@@ -59,10 +59,18 @@ class file_input_adapter : public input_adapter_protocol
         : m_file(f)
     {}
 
+    // make class move-only
+    file_input_adapter(const file_input_adapter&) = delete;
+    file_input_adapter(file_input_adapter&&) noexcept = default;
+    file_input_adapter& operator=(const file_input_adapter&) = delete;
+    file_input_adapter& operator=(file_input_adapter&&) noexcept = default;
+    ~file_input_adapter() override = default;
+
     std::char_traits<char>::int_type get_character() noexcept override
     {
         return std::fgetc(m_file);
     }
+
   private:
     /// the file pointer to read from
     std::FILE* m_file;

include/nlohmann/detail/input/json_sax.hpp

@@ -159,6 +159,13 @@ class json_sax_dom_parser
         : root(r), allow_exceptions(allow_exceptions_)
     {}
 
+    // make class move-only
+    json_sax_dom_parser(const json_sax_dom_parser&) = delete;
+    json_sax_dom_parser(json_sax_dom_parser&&) noexcept = default;
+    json_sax_dom_parser& operator=(const json_sax_dom_parser&) = delete;
+    json_sax_dom_parser& operator=(json_sax_dom_parser&&) noexcept = default;
+    ~json_sax_dom_parser() = default;
+
     bool null()
     {
         handle_value(nullptr);
@@ -307,7 +314,7 @@ class json_sax_dom_parser
     /// the parsed JSON value
     BasicJsonType& root;
     /// stack to model hierarchy of values
-    std::vector<BasicJsonType*> ref_stack;
+    std::vector<BasicJsonType*> ref_stack {};
     /// helper to hold the reference for the next object element
     BasicJsonType* object_element = nullptr;
     /// whether a syntax error occurred
@@ -335,6 +342,13 @@ class json_sax_dom_callback_parser
         keep_stack.push_back(true);
     }
 
+    // make class move-only
+    json_sax_dom_callback_parser(const json_sax_dom_callback_parser&) = delete;
+    json_sax_dom_callback_parser(json_sax_dom_callback_parser&&) = default;
+    json_sax_dom_callback_parser& operator=(const json_sax_dom_callback_parser&) = delete;
+    json_sax_dom_callback_parser& operator=(json_sax_dom_callback_parser&&) = default;
+    ~json_sax_dom_callback_parser() = default;
+
     bool null()
     {
         handle_value(nullptr);
@@ -612,11 +626,11 @@ class json_sax_dom_callback_parser
     /// the parsed JSON value
     BasicJsonType& root;
     /// stack to model hierarchy of values
-    std::vector<BasicJsonType*> ref_stack;
+    std::vector<BasicJsonType*> ref_stack {};
     /// stack to manage which values to keep
-    std::vector<bool> keep_stack;
+    std::vector<bool> keep_stack {};
     /// stack to manage which object keys to keep
-    std::vector<bool> key_keep_stack;
+    std::vector<bool> key_keep_stack {};
     /// helper to hold the reference for the next object element
     BasicJsonType* object_element = nullptr;
     /// whether a syntax error occurred

include/nlohmann/detail/input/lexer.hpp

@@ -3,16 +3,16 @@
 #include <array> // array
 #include <clocale> // localeconv
 #include <cstddef> // size_t
-#include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
 #include <cstdio> // snprintf
+#include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
 #include <initializer_list> // initializer_list
 #include <string> // char_traits, string
 #include <utility> // move
 #include <vector> // vector
 
-#include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
 #include <nlohmann/detail/input/position_t.hpp>
+#include <nlohmann/detail/macro_scope.hpp>
 
 namespace nlohmann
 {
@@ -1485,7 +1485,7 @@ scan_number_done:
     bool next_unget = false;
 
     /// the start position of the current token
-    position_t position;
+    position_t position {};
 
     /// raw input token string (for error messages)
     std::vector<char> token_string {};

include/nlohmann/detail/input/parser.hpp

@@ -9,11 +9,11 @@
 #include <vector> // vector
 
 #include <nlohmann/detail/exceptions.hpp>
-#include <nlohmann/detail/macro_scope.hpp>
-#include <nlohmann/detail/meta/is_sax.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
 #include <nlohmann/detail/input/json_sax.hpp>
 #include <nlohmann/detail/input/lexer.hpp>
+#include <nlohmann/detail/macro_scope.hpp>
+#include <nlohmann/detail/meta/is_sax.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
 namespace nlohmann

include/nlohmann/detail/iterators/iter_impl.hpp

@@ -607,7 +607,7 @@ class iter_impl
     /// associated JSON instance
     pointer m_object = nullptr;
     /// the actual iterator of the associated instance
-    internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it;
+    internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it {};
 };
 }  // namespace detail
 } // namespace nlohmann

include/nlohmann/detail/iterators/iteration_proxy.hpp

@@ -1,12 +1,12 @@
 #pragma once
 
 #include <cstddef> // size_t
-#include <string> // string, to_string
 #include <iterator> // input_iterator_tag
+#include <string> // string, to_string
 #include <tuple> // tuple_size, get, tuple_element
 
-#include <nlohmann/detail/value_t.hpp>
 #include <nlohmann/detail/meta/type_traits.hpp>
+#include <nlohmann/detail/value_t.hpp>
 
 namespace nlohmann
 {

include/nlohmann/detail/json_pointer.hpp

@@ -7,8 +7,8 @@
 #include <utility> // move
 #include <vector> // vector
 
-#include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/exceptions.hpp>
+#include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/value_t.hpp>
 
 namespace nlohmann

include/nlohmann/detail/meta/detected.hpp

@@ -14,7 +14,9 @@ struct nonesuch
     nonesuch() = delete;
     ~nonesuch() = delete;
     nonesuch(nonesuch const&) = delete;
+    nonesuch(nonesuch const&&) = delete;
     void operator=(nonesuch const&) = delete;
+    void operator=(nonesuch&&) = delete;
 };
 
 template <class Default,

include/nlohmann/detail/meta/type_traits.hpp

@@ -5,11 +5,11 @@
 #include <type_traits> // false_type, is_constructible, is_integral, is_same, true_type
 #include <utility> // declval
 
-#include <nlohmann/json_fwd.hpp>
 #include <nlohmann/detail/iterators/iterator_traits.hpp>
+#include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/meta/detected.hpp>
-#include <nlohmann/detail/macro_scope.hpp>
+#include <nlohmann/json_fwd.hpp>
 
 namespace nlohmann
 {

include/nlohmann/detail/output/serializer.hpp

@@ -14,8 +14,8 @@
 #include <type_traits> // is_same
 #include <utility> // move
 
-#include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/conversions/to_chars.hpp>
+#include <nlohmann/detail/exceptions.hpp>
 #include <nlohmann/detail/macro_scope.hpp>
 #include <nlohmann/detail/meta/cpp_future.hpp>
 #include <nlohmann/detail/output/binary_writer.hpp>
@@ -278,6 +278,11 @@ class serializer
                 o->write_characters("null", 4);
                 return;
             }
+
+            default:
+            {
+                assert(false);  // LCOV_EXCL_LINE
+            }
         }
     }
 
@@ -474,6 +479,11 @@ class serializer
                             state = UTF8_ACCEPT;
                             break;
                         }
+
+                        default:
+                        {
+                            assert(false);  // LCOV_EXCL_LINE
+                        }
                     }
                     break;
                 }
@@ -534,6 +544,11 @@ class serializer
                     }
                     break;
                 }
+
+                default:
+                {
+                    assert(false);  // LCOV_EXCL_LINE
+                }
             }
         }
     }

include/nlohmann/json.hpp

@@ -48,29 +48,29 @@ SOFTWARE.
 #include <utility> // declval, forward, move, pair, swap
 #include <vector> // vector
 
-#include <nlohmann/json_fwd.hpp>
+#include <nlohmann/adl_serializer.hpp>
-#include <nlohmann/detail/macro_scope.hpp>
-#include <nlohmann/detail/meta/cpp_future.hpp>
-#include <nlohmann/detail/meta/type_traits.hpp>
-#include <nlohmann/detail/exceptions.hpp>
-#include <nlohmann/detail/value_t.hpp>
 #include <nlohmann/detail/conversions/from_json.hpp>
 #include <nlohmann/detail/conversions/to_json.hpp>
+#include <nlohmann/detail/exceptions.hpp>
+#include <nlohmann/detail/input/binary_reader.hpp>
 #include <nlohmann/detail/input/input_adapters.hpp>
 #include <nlohmann/detail/input/lexer.hpp>
 #include <nlohmann/detail/input/parser.hpp>
-#include <nlohmann/detail/iterators/primitive_iterator.hpp>
 #include <nlohmann/detail/iterators/internal_iterator.hpp>
 #include <nlohmann/detail/iterators/iter_impl.hpp>
 #include <nlohmann/detail/iterators/iteration_proxy.hpp>
 #include <nlohmann/detail/iterators/json_reverse_iterator.hpp>
-#include <nlohmann/detail/output/output_adapters.hpp>
+#include <nlohmann/detail/iterators/primitive_iterator.hpp>
-#include <nlohmann/detail/input/binary_reader.hpp>
-#include <nlohmann/detail/output/binary_writer.hpp>
-#include <nlohmann/detail/output/serializer.hpp>
-#include <nlohmann/detail/json_ref.hpp>
 #include <nlohmann/detail/json_pointer.hpp>
-#include <nlohmann/adl_serializer.hpp>
+#include <nlohmann/detail/json_ref.hpp>
+#include <nlohmann/detail/macro_scope.hpp>
+#include <nlohmann/detail/meta/cpp_future.hpp>
+#include <nlohmann/detail/meta/type_traits.hpp>
+#include <nlohmann/detail/output/binary_writer.hpp>
+#include <nlohmann/detail/output/output_adapters.hpp>
+#include <nlohmann/detail/output/serializer.hpp>
+#include <nlohmann/detail/value_t.hpp>
+#include <nlohmann/json_fwd.hpp>
 
 /*!
 @brief namespace for Niels Lohmann
@@ -1325,6 +1325,8 @@ class basic_json
             case value_t::discarded:
                 m_type = value_t::discarded;
                 break;
+            default:
+                assert(false);  // LCOV_EXCL_LINE
         }
         assert_invariant();
     }
@@ -7695,7 +7697,7 @@ class basic_json
                     break;
                 }
 
-                case patch_operations::invalid:
+                default:
                 {
                     // op must be "add", "remove", "replace", "move", "copy", or
                     // "test"

test/src/unit-alt-string.cpp

@@ -149,7 +149,7 @@ class alt_string
     }
 
   private:
-    std::string str_impl;
+    std::string str_impl {};
 
     friend bool ::operator<(const char*, const alt_string&);
 };

test/src/unit-class_parser.cpp

@@ -125,7 +125,7 @@ class SaxEventLogger
         return false;
     }
 
-    std::vector<std::string> events;
+    std::vector<std::string> events {};
     bool errored = false;
 };
 

test/src/unit-deserialization.cpp

@@ -123,7 +123,7 @@ struct SaxEventLogger : public nlohmann::json_sax<json>
         return false;
     }
 
-    std::vector<std::string> events;
+    std::vector<std::string> events {};
 };
 
 struct SaxEventLoggerExitAfterStartObject : public SaxEventLogger

test/src/unit-regression.cpp

@@ -124,8 +124,10 @@ struct nocopy
 
 struct Data
 {
-    std::string a;
+    Data() = default;
-    std::string b;
+    Data(const std::string& a_, const std::string b_) : a(a_), b(b_) {}
+    std::string a {};
+    std::string b {};
 };
 
 void from_json(const json& j, Data& data)