json/ChangeLog.md

Changelog

All notable changes to this project will be documented in this file. This project adheres to Semantic Versioning.

v3.10.0 (2021-08-17)

Full Changelog

• Latest version 3.9.1 uses throw instead of JSON_THROW in the amalgamated json.hpp file #2934

• Copy to a variable inside a Structure #2933

• warning C4068: unknown pragma 'GCC' on MSVC/cl #2924

• Errors during ninja test #2918

• compiler warning: "not return a value" #2917

• Comparison floating points causes warning #2909

• Why can't I have std::vector<json&> testList? #2900

• json.hpp

• g++ 11 -Wuseless-cast gives lots of warnings #2893

• Cannot serialize and immediatly deserialize json to/from bson #2892

• Floating-point precision conversion error #2876

• How to avoid escaping for an already escaped string in .dump() #2870

• can't parse std::vector<std::byte> #2869

• ASAN detects memory leaks #2865

• Binary subtype field cannot represent all CBOR tags #2863

• string literals possibly being parsed as another type due to the presence of only digits and full-stops #2852

• json::parse() works only with absolute paths #2851

• Compiler Warnings on Raspberry Pi OS #2850

• Braced initialization and aggregate initialization behavior is different for json::array() function call. #2848

• 3.9.1: test suite is failing #2845

• Documentation for macro JSON_NO_IO is missing #2842

• Assertion failure when inserting into arrays with JSON_DIAGNOSTICS set #2838

• HELP! There is a memory leak in the code?! #2837

• Elegant conversion of a 2-D-json array to a standard C++ array #2805

• Swift Package Manager support #2802

• Referencing a subkey which doesn't exist gives crash #2797

• Failed benchmark due to renamed branch #2796

• Build Errors with VS 2019 and json Version 3.9.1 when attempting to replicate SAX Example #2782

• Value with spaces cannot be parsed #2781

• Question

• Using JSON.hpp header file in Visual Studio 2013 C++ Project #2775

• compilation error on clang-8 + C++17 #2759

• Undefined symbol EOF #2755

• Parsing a string into json object behaves differently under g++ and MinGW compilers. #2746

• big git history size #2742

• How to get reference of std::vector<T> #2735

• CMake failure in VS2019 Community #2734

• Possibility to use with custom c++ version to use in intel sgx enclaves #2730

• Possibility to use without the dependency to file io and streams to use in intel sgx enclaves #2728

• error C2784& error C2839... in my visual studio 2015 compiler #2726

• -fno-expection not respected anymore in 3.9.1 #2725

• When exceptions disabled with JSON_NOEXCEPTION, lib just aborts without any message #2724

• Critical error detected c0000374 on windows10 msvc 2019 16.8.5 #2710

• unused parameter error/warning #2706

• How to store data into a Map from json file #2691

• Tests do not compile with pre-release glibc #2686

• compile errors .... chromium-style #2680

• .dump() not allowing compact form #2678

• error: no matching function for call to ‘nlohmann::basic_json<>::value(int, std::set<int>&)’ #2671

• Compiler warning: unused parameter #2668

• Deserializing to a struct as shown on the project homepage throws compile time errors #2665

• Unable to compile on MSVC 2019 with SDL checking enabled: This function or variable may be unsafe #2664

• terminating with uncaught exception of type nlohmann::detail::type_error: [json.exception.type_error.302] type must be array, but is object #2661

• unused-parameter on OSX when Diagnostics is off #2658

• std::pair wrong serialization #2655

• The result of json is_number_integer() function is wrong when read a json file #2653

• 2 backslash cause problem #2652

• No support for using an external/system copy of Hedley #2651

• error: incomplete type 'qfloat16' used in type trait expression #2650

• Unused variable in exception class when not using improved diagnostics #2646

• I am trying to do this - converting from wstring works incorrectly! #2642

• Exception 207 On ARM Processor During Literal String Parsing #2634

• double free or corruption !prev error on Json push_back and write #2632

• nlohmann::detail::parse_error: syntax error while parsing CBOR string: expected length specification 0x60-0x7B or indefinite string type 0x7F #2629

• please allow disabling implicit conversions in non-single-file use #2621

• Preserve decimal formatting #2618

• Visual Studio Visual Assist code issues reported by VA code inspection of file json.hpp #2615

• Missing get function and no viable overloaded '=' on mac #2610

• corruption when parse from string #2603

• Parse from byte-vector results in compile error #2602

• Memory leak when working on ARM Linux #2601

• Unhandled exception in test-cbor.exe Stack overflow when debugging project with Visual Studio 2019 16.7.7 compiled with c++17 or c++latest #2598

• Error in download_test_data.vcxproj when compiling with Visual Studio 2019 16.7.7 Professional msbuild on Windows 10 2004 Professional #2594

• Warnings C4715 and C4127 when building json-3.9.1 with Visual Studio 2019 16.7.7 #2592

• I tried some change to dump() for [1,2,3...] #2584

• try/catch block does not catch parsing error #2579

• Serializing uint64_t is broken for large values #2578

• deserializing arrays should be part of the library #2575

• Deserialization to std::array with non-default constructable types fails #2574

• Compilation error when trying to use same type for number_integer_t and number_unsigned_t in basic_json template specification. #2573

• compiler error: directive output may be truncated writing between 2 and 8 bytes #2572

• Incorrect convert map to json when key cannot construct an string i.e. int #2564

• no matching function for call to ‘nlohmann::basic_json<>::basic_json(<brace-enclosed initializer list>)’ #2559

• type_error factory creates a dangling pointer in VisualStudio 2019 #2535

• Cannot assign from ordered_json vector<CustomStruct> to value in not ordered json #2528

• Qt6: Break changes #2519

• valgrind memcheck Illegal instruction when use nlohmann::json::parse #2518

• Buffer overflow #2515

• Including CTest in the top-level CMakeLists.txt sets BUILD_TESTING=ON for parent projects #2513

• Compilation error when using NLOHMANN_JSON_SERIALIZE_ENUM ordered_json on libc++ #2491

• Missing "void insert( InputIt first, InputIt last );" overload in nlohmann::ordered_map #2490

• Could not find a package configuration file provided by "nlohmann_json" #2482

• json becomes empty for unknown reason #2470

• Using std::wstring as StringType fails compiling #2459

• Sample code in GIF slide outdated cannot use emplace\( with array) #2457

• from_json<std::wstring> is treated as an array on latest MSVC #2453

• MemorySanitizer: use-of-uninitialized-value #2449

• I need help #2441

• type conversion failing with clang ext_vector_type #2436

• json::parse() can't be resolved under specific circumstances #2427

• from_*ptr, len deprecation #2426

• Error ONLY in release mode #2425

• "Custom data source" exemple make no sense #2423

• Compile errors #2421

• Refuses to compile in project #2419

• Compilation failure of tests with C++20 standard caused by change of u8 literals #2413

• No matching function for call to 'input_adapter' under Xcode of with nlohmann version 3.9.1 #2412

• Git tags are not valid semvers #2409

• after dump, stderr output disappear #2403

• Using custom string. #2398

• value() throws unhandled exception for partially specified json object #2393

• assertion on runtime causes program to stop when accessing const json with missing key #2392

• Usage with -fno-elide-constructors causes dump() output to be array of nulls #2387

• Build fails with clang-cl due to override of CMAKE_CXX_COMPILER(?) #2384

• std::optional not working with primitive types #2383

• Unexpected array when initializing a json const& on gcc 4.8.5 using uniform syntax #2370

• setprecision support #2362

• json::parse(allow_exceptions = false) documentation is misleading. #2360

• std::begin and std::end usage without specifying std namespace #2359

• Custom object conversion to json hangs in background thread #2358

• Add support of nullable fields to NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE and NLOHMANN_DEFINE_TYPE_INTRUSIVE #2356

• the portfile for the vcpkg is not working. #2351

• Compiler warns of implicit fallthrough when defining preprocessor macro NDEBUG #2348

• Compile error on Intel compiler running in Windows #2346

• Build error caused by overwriting CMAKE_CXX_COMPILER #2343

• Error: an attribute list cannot appear here JSON_HEDLEY_DEPRECATED_FOR #2342

• compiler warning #2341

• 3.9.0: tests make build non-reproducible #2324

• Initialization different between gcc/clang #2311

• Attempt to get() a numeric value as a type which cannot represent it should throw #2310

• Surprising behaviour with overloaded operators #2256

• ADL issue in input_adapter #2248

• Output adapters should be templated. #2172

• error when using nlohmann::json, std::function and std::bind #2147

• Remove undefined behavior for const operator[] #2111

• json({}) gives null instead of empty object with GCC and -std=c++17 #2046

• GDB pretty printing support #1952

• Always compile tests with all warnings enabled and error out on warnings #1798

• Fixes Cppcheck warnings #1759

• How to get position info or parser context with custom from_json() that may throw exceptions? #1508

• Suggestion to improve value() accessors with respect to move semantics #1275

• Add Key name to Exception #932

• Overwork warning flags #2936 (nlohmann)

• Treat MSVC warnings as errors #2930 (nlohmann)

• All: fix warnings when compiling with -Wswitch-enum #2927 (fhuberts)

• Guard GCC pragmas #2925 (nlohmann)

• Supress -Wfloat-equal on intended float comparisions #2911 (Finkman)

• Fix binary subtypes #2908 (nlohmann)

• Fix useless-cast warnings #2902 (nlohmann)

• Add regression test #2898 (nlohmann)

• Refactor Unicode tests #2889 (nlohmann)

• CMake cleanup #2885 (nlohmann)

• Avoid string in case of empty CBOR objects #2879 (nlohmann)

• Suppress C4127 warning in unit-json_pointer.cpp #2875 (nlohmann)

• Fix truncation warning #2874 (nlohmann)

• Fix memory leak in to_json #2872 (nlohmann)

• Fix assertion failure in diagnostics #2866 (nlohmann)

• Update documentation #2861 (nlohmann)

• Consistency with using in README.md #2826 (justanotheranonymoususer)

• Properly constrain the basic_json conversion operator #2825 (ldionne)

• Fix CI #2817 (nlohmann)

• Specified git branch for google benchmark fetch in benchmark test #2795 (grafail)

• Add C++ standards to macOS matrix #2790 (nlohmann)

• Update URLs to HTTPS #2789 (TotalCaesar659)

• Link to Conan Center package added #2771 (offa)

• Keep consistent formatting #2770 (jasmcaus)

• Add a cmake option to use SYSTEM in target_include_directories #2762 (jpl-mac)

• replace EOF with std::char_traits<char>::eof() #2756 (nlohmann)

• Fix typo in README #2754 (mortenfyhn)

• Update documentation #2749 (nlohmann)

• Add documentation for numbers #2747 (nlohmann)

• Use Clang 12 in CI #2737 (nlohmann)

• Fixes #2730 #2731 (theShmoo)

• Possibility to use without the dependency to file io and streams to use in intel sgx enclaves #2729 (theShmoo)

• Update json.hpp #2707 (raduteo)

• pkg-config.pc.in: Don't concatenate paths #2690 (doronbehar)

• add more CI steps #2689 (nlohmann)

• Update doctest from 2.4.4 to 2.4.6 fixes \#2686 #2687 (musicinmybrain)

• License fix #2683 (nlohmann)

• Update parse_exceptions.md - correct json::exception::parse_error #2679 (frasermarlow)

• Remove HEDLEY annotation from exception::what() #2673 (remyjette)

• Fix amount of entries in the json object #2659 (abbaswasim)

• Fix missing 1.78 in example in README.md #2625 (wawiesel)

• Add GDB pretty printer #2607 (nlohmann)

• readme: fix tilde character display #2582 (bl-ue)

• Add support for deserialization of STL containers of non-default constructable types fixes \#2574. #2576 (AnthonyVH)

• Better diagnostics #2562 (nlohmann)

• CI targets #2561 (nlohmann)

• Add switch to skip non-reproducible tests. #2560 (nlohmann)

• Fix compilation of input_adapter(container) in edge cases #2553 (jasujm)

• Allow parsing from std::byte containers #2550 (nlohmann)

• Travis doesn't run any tests in C++17 mode #2540 (karzhenkov)

• Doctest is updated to v2.4.3 #2538 (YarikTH)

• Fix warnings #2537 (nlohmann)

• Fix a shadowing warning #2536 (nlohmann)

• Clarify license of is_complete_type implementation #2534 (nlohmann)

• Do not unconditionally redefine C++14 constructs #2533 (nlohmann)

• Doctest is updated to v2.4.1 #2525 (YarikTH)

• Add MAIN_PROJECT check for test and install options #2514 (globberwops)

• Ranged insert test section is added in unit-ordered_json.cpp #2512 (YarikTH)

• Add asserts to suppress C28020 #2447 (jbzdarkid)

• Change argument name "subtype" in byte_container_with_subtype #2444 (linev)

• 📝 add CPM.Cmake example #2406 (leozz37)

• Fix move constructor of json_ref #2405 (karzhenkov)

• Properly select "Release" build for Travis #2375 (karzhenkov)

• Update Hedley #2367 (nlohmann)

• Fix and extend documentation of discarded values #2363 (nlohmann)

• Fix typos in documentation #2354 (rbuch)

• Remove "#define private public" from tests #2352 (nlohmann)

• Remove -Wimplicit-fallthrough warning #2349 (nlohmann)

• Fix code to work without exceptions #2347 (nlohmann)

• fix cmake script overwriting compiler path #2344 (ongjunjie)

v3.9.1 (2020-08-06)

Full Changelog

• Can't parse not formatted JSON. #2340

• parse returns desired array contained in array when JSON text begins with square bracket on gcc 7.5.0 #2339

• Unexpected deserialization difference between Mac and Linux #2338

• Reading ordered_json from file causes compile error #2331

• ignore_comment=true fails on multiple consecutive lines starting with comments #2330

• Update documentation about Homebrew installation and CMake integration - Homebrew #2326

• Chinese character initialize error #2325

• json.update and vector<pair>does not work with ordered_json #2315

• Ambiguous call to overloaded function #2210

• Fix fallthrough warning #2333 (nlohmann)

• Fix lexer to properly cope with repeated comments #2332 (nlohmann)

• Fix name of Homebrew formula in documentation #2327 (nlohmann)

• fix typo #2320 (wx257osn2)

• Fix a bug due to missing overloads in ordered_map container #2319 (nlohmann)

• cmake: install pkg-config file relative to current_binary_dir #2318 (eli-schwartz)

• Fixed installation of pkg-config file on other than Ubuntu #2314 (xvitaly)

v3.9.0 (2020-07-27)

Full Changelog

• Unknown Type Name clang error when using NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE #2313

• Clang 10.0 / GCC 10.1 warnings on disabled exceptions #2304

• Application stalls indefinitely with message byte size 10 #2293

• linker error #2292

• Add support for high-precision numbers in UBJSON encoding #2286

• NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE fails if the length of the argument is 10 #2280

• Custom types : MACRO expansion bug #2267

• to/from_json Failing To Convert String #2238

• clang 9.0 report warning: unused type alias 'size_type' [-Wunused-local-typedef] #2221

• Enormous array created when working with map<int,T> #2220

• Can I disable sorting of json values #2219

• Getting Qt types to work #2217

• Convert to Qt QVariant #2216

• How to custom serialize same data type of vector? #2215

• json constructor does not support std::optional #2214

• Failing to Parse Valid JSON #2209

• (De-)Serialization of std::variant with namespaces #2208

• Addint support for complex type #2207

• array_index possible out of range #2205

• Object deserialized as array #2204

• Sending to a function a reference to a sub-branch #2200

• How to Serialize derived class to JSON object? #2199

• JSON incorrectly serialized #2198

• Exception Unhandled out_of_range error #2197

• msgpack serialisation : float is treated as 64bit float, not 32bit float. #2196

• Is it possible to use compile-time type guarantees for JSON structures? #2195

• Question : performance against python dict #2194

• vs2017 compile error #2192

• Check if a key exists #2191

• Failed to run tests due to missing test data on builders without Internet access #2190

• 3.8.0: unit-cbor.cpp test failures #2189

• 'nlohmann/json.hpp' file not found #2188

• How to send json data over the wire? #2185

• Ubuntu 16 not supporting nlohmann/json? #2184

• .get<std::string> causing emdash errors #2180

• Object properties should not be re-sorted alphabetically #2179

• Custom type registration : instrusive API #2175

• Many version of the function "void to_json(json& j, const MyStruct& struct)" #2171

• How should strings be escaped? #2155

• Adding a value to an existing json puts it at the beginning instead of the end #2149

• The header file is big, can we use what we need. #2134

• Changing the default format for unordered_map or other set #2132

• Getting size of deserialized bson document #2131

• implicit conversion failure #2128

• Error thrown when parsing in a subclass #2124

• explicit conversion to string not considered for std::map keys in GCC8 #2096

• Add support for JSONC #2061

• Library provides template arg for string_type but assumes std::string in some places #2059

• incremental parsing with sax_parser #2030

• Question about flatten and unflatten #1989

• CBOR parser doesn't skip tags #1968

• Compilation failure using Clang on Windows #1898

• Fail to build when including json.hpp as a system include #1818

• Parsing string into json doesn't preserve the order correctly. #1817

• C++17

• How can I save json object in file in order? #1717

• Support for Comments #1513

• clang compiler: error : unknown type name 'not' #1119

• dump() without alphabetical order #1106

• operator T() considered harmful #958

• Order of the elements in JSON object #952

• How to prevent alphabetical sorting of data? #727

• Why is an object ordering values by Alphabetical Order? #660

• Feature request: Comments #597

• Head Elements Sorting #543

• Automatic ordered JSON #424

• Support for comments. #376

• Optional comment support. #363

• Strip comments / Minify #294

• maintaining order of keys during iteration #106

• Update documentation #2312 (nlohmann)

• Fix bug in CBOR tag handling #2308 (nlohmann)

• added inline to NLOHMANN_DEFINE_TYPE_NON_INTRUSIVE macro #2306 (jwittbrodt)

• fixes unused variable 'ex' for #2304 #2305 (AODQ)

• Cleanup #2303 (nlohmann)

• Add test with multiple translation units #2301 (nlohmann)

• Merge GitHub actions #2300 (nlohmann)

• Fix unused parameter #2299 (nlohmann)

• Add support for high-precision numbers in UBJSON encoding #2297 (nlohmann)

• fix eof for get_binary and get_string #2294 (jprochazk)

• Serialisation macros: increase upper bound on number of member variables #2287 (pfeatherstone)

• add inline specifier for detail::combine #2285 (T0b1-iOS)

• Add static assertion for missing binary function in SAX interface #2282 (nlohmann)

• Add test for target_include_directories #2279 (nlohmann)

• Clean up maintainer Makefiles and fix some linter warnings #2274 (nlohmann)

• Add option to ignore CBOR tags #2273 (nlohmann)

• Hash function without allocation #2269 (nlohmann)

• Add ClangCL for MSVC #2268 (t-b)

• Makefile: Always use SED variable #2264 (t-b)

• Add Xcode 12 CI #2262 (nlohmann)

• Make library work with Clang on Windows #2259 (nlohmann)

• Add ordered_json specialization with ordered object keys #2258 (nlohmann)

• Add pkg-config file #2253 (ericonr)

• Fix regression from #2181 #2251 (nlohmann)

• Tag binary values in cbor if set #2244 (matthewbauer)

• Make assert configurable via JSON_ASSERT #2242 (nlohmann)

• Add specialization of get_to #2233 (nlohmann)

• Refine documentation of error_handler parameter #2232 (nlohmann)

• Simplify conversion from/to custom types #2225 (nlohmann)

• Remove unused typedefs #2224 (nlohmann)

• Enable CMake policy CMP0077 #2222 (alexreinking)

• Add option to ignore comments in parse/accept functions #2212 (nlohmann)

• Fix Clang-Tidy warnings #2211 (nlohmann)

• Simple ordered_json that works on all supported compilers #2206 (gatopeich)

• Use unsigned indizies for array index in json pointer #2203 (t-b)

• Add option to not rely on Internet connectivity during test stage #2202 (nlohmann)

• Serialize floating-point numbers with 32 bit when possible MessagePack #2201 (nlohmann)

• Fix consistency in function int_to_string() #2193 (dota17)

• Fix issue#1275 #2181 (dota17)

• C++20 support by removing swap specialization #2176 (gracicot)

• Feat/explicit conversion operator #1559 (theodelrieu)

v3.8.0 (2020-06-14)

Full Changelog

• sorry delete this issue, i'm stupid #2187

• Append to a std::nlohmann::json type #2186

• Some troubles to compile the last revision #2177

• ​#​ 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 #2170

• https://www.github.com/nlohmann/json/tree/develop/include%2Fnlohmann%2Fjson_fwd.hpp #2169

• templated from_json of non primitive types causes gcc error #2168

• few warnings/errors in copy assignment #2167

• Different output when upgrading from clang 9 to clang 10 #2166

• Cannot build with VS 2019 / C++17 #2163

• Q: When I received an illegal string,How the program knows? #2162

• Problem while reading a json file #2161

• converting std::chrono::system_clock::time_point to json. #2159

• how to parse vector<struct> format #2157

• nlohmann::json and =nullptr #2156

• test-cbor fails #2154

• Accessing array inside array syntax? #2151

• Best way to catch errors when querying json #2150

• JSON Data Mapping Key-Value from other Key-Value #2148

• Conflicts with std <any> compiling with GCC 10 #2146

• Incorrect CMake FetchContent example #2142

• Help for a Beginner? #2141

• Read Json from File #2139

• How to feed a predefined integer value into json string #2138

• getting json array inside json object #2135

• Add .contains example to doc #2133

• Is it safe to return string.c_str() received from get()? #2130

• GCC 10: Compilation error when including any before including json header in C++17 mode #2129

• Intersection of two json files #2127

• App crashes when dump method called for non ascii chars. #2126

• iterator based erase method #2122

• quick and convenient api to get/set nested json values #2120

• assigning nullptr to std::string #2118

• usless_cast warnings with gcc 9.3 and 10.1 C++17 #2114

• clang 10 warning #2113

• Possible incorrect _MSC_VER reference #2112

• warning under gcc 10.1 #2110

• Wdeprecated-declarations from GCC v10.1.0 #2109

• Global std::vector from json #2108

• heap-buffer-overflow when using nlohmann/json, ASAN, and gtest #2107

• exception 0x770DC5AF when i read an special char in json file #2106

• json::parse() fails to parse a dump(2,' ') output, yet does successfully parse dump() #2105

• run test-udt error in MSVC 19.16.27034.0 #2103

• Unable to dump to stringstream #2102

• Can't ad an object in another objet #2101

• Implicit conversion causes "cannot use operator[] with a string argument with string" #2098

• C++20: char8_t #2097

• Compilation issues when included in project #2094

• string value with null character causes infinite loop #2093

• corrupted size vs. prev_size aborted #2092

• Get string field content without return std::string copy #2091

• JSON Comments JSON 5 #2090

• Remove #include <ciso646> #2089

• JSON library as a git submodule #2088

• Apple Clang 11.0.3 on MacOS Catalina 10.15.4 not compiling #2087

• Value function return empty object even if it exist #2086

• Cannot debug but Run works #2085

• Question about serialization. #2084

• How to include in an external project #2083

• Missing tests for binary values #2082

• How to override default string serialization? #2079

• Can't have a json type as a property in an arbitrary type #2078

• New release? #2075

• CMake FetchContent > Updating the documentation? #2073

• How to convert STL Vector of user defined type to Json #2072

• how to make an array of objects #2070

• ‘__int64’ was not declared #2068

• json.exception.type\_error.317

• Unexpected end of input; expected '[', '{', or a literal #2066

• Json structure can be nested? #2065

• Bug: returning reference to local temporary object #2064

• Allow to use non strict parsing #2063

• Crashing on json::at #2062

• How to convert a const std::vector<char8_t> message to a json, to be able to parse it and extract information from it? Can you point to any examples? #2058

• Nice library #2057

• json.hpp:15372:22: error: expected unqualified-id if (not std::isfinite(x)): Started getting this bug after updating my XCode #2056

• Confused as how I can extract the values from the JSON object. #2055

• Warnings with GCC 10 #2052

• Warnings with Clang 10 #2049

• Update doctest #2048

• Unclear error message: "cannot use operator[] with a string argument with array" #2047

• Serializing std::variant<T, std::vector<T>> #2045

• Crash when parse big jsonfile #2042

• How to check if a key exists without silently generating null objects on the path #2041

• Crash when traversing over items() of temporary json objects #2040

• How to parse multiple line value ? #2039

• SAX API uses unsigned std::size_t but -1 if element size is not known; #2037

• How to parse big decimal data #2036

• how use template <typename T> struct adl_serializer #2035

• auto iterator returned by find to handle value depending if is string or numeric. #2032

• pass find returned iterator to numeric variable. #2031

• Parse error on valid json file #2029

• Is here any elegant way to combine serialization and deserialization code? #2028

• Notes about dump function #2027

• Different JSON printouts for empty dictionary on Linux and Mac. #2026

• easier way to get exception reason out of json_sax_dom_callback_parser without exceptions #2024

• Using fifo_map with base class and derived class #2023

• Error reading JSON File #2022

• Parse causing crash on android. Cannot catch. #2021

• Extra backslashes in nested json #2020

• How to create patch for merge_patch input ? #2018

• CppUTest/include/CppUTestExt/MockSupport.h:40: error: default argument for ‘MockFailureReporter* failureReporterForThisCall’ has type ‘void*’ #2017

• including another file #2016

• GNU PREREQ Error with gcc 9.3.0 #2015

• Parse error: json.exception.parse_error.101 - invalid string: ill-formed UTF-8 byte #2014

• Add more flexibility to basic_json's ObjectType and ArrayType #2013

• afl persistent mode #2012

• Compiler Errors under VS2019 in Appveyor CI #2009

• Another compilation failure with Visual Studio #2007

• Implicit cast to std::string broken again with VS2019 16.5.0 #2006

• error: no matching member function for call to 'AddRaw' #2005

• When I re-create an object again after the network request, an error is reported #2003

• How to merge and not replace different Json::Value objects in jsoncpp #2001

• scalar transforms to list #2000

• Dump JSON containing multibyte characters #1999

• Build error when modify value #1998

• How do i include a vector of pointers in my json? #1997

• Compiler error wrt incomplete types changed in gcc8.3.0-26 #1996

• NaN-like comparison behavior of discarded is inconvenient #1988

• Maintaining JSON package in my CMake #1987

• reading int number and string number #1986

• Build error: keyword is hidden by macro definition! #1985

• JSON patch diff for op=add formation is not as per standard RFC 6902 #1983

• json_pointer.contains() exception is incorrectly raised #1982

• Error with non existing key #1981

• Closed #1978

• Where is the library built and what is the name? #1977

• The cmake_import example does not build #1976

• Dumping core when reading invalid file #1975

• Abort in dump() method #1973

• Unclear docs regarding parser_callback_t callbacks #1972

• Possible memory leak on push_back #1971

• Is it possible to get a safe mutable reference/pointer to internal variant used in nlohmann json? #1970

• Getting a flatten json to map<string, string> #1957

• forced type conversion or lexical cast without exception. #1955

• Add json_view type support to avoid excessive copying #1954

• Adding "examples" section for real-life usages #1953

• Add nlohmann::json::key_type #1951

• cannot use operator[] with a string argument with string #1949

• std::ifstream >> json error #1948

• Cannot update json data in an iterator? #1947

• How can i build this library in VS 2017? #1943

• json_pointer.contains() exceptions when path not found #1942

• Nested objects serialize/deserialize #1941

• Compile warning on architectures that are not x86 #1939

• Version of nlohmann-json-dev in debian packages #1938

• Create a json object for every cycle #1937

• How to get the object name? #1936

• Reserve and resize function for basic json #1935

• How to use json parse in tsl::ordread_map? #1934

• C++14 support is not enabled with msvc2015 #1932

• Need help with to_json for derived class, keep getting "cannot use operator" #1931

• How to handle std::vector<std::uint8_t> #1930

• Heap corruption issue #1929

• Add std::wistream support. #1928

• This i can write and read any file thanks #1927

• How can I get this simple example working? #1926

• emplace_back does not seems to work with the int 0 #1925

• Why nlohmann does not release memory #1924

• Is it possible to have template json::parse with noexcept specifier? #1922

• JSON to wstring? #1921

• GCC 10 tests build failure #1920

• Size of binary json representations #1919

• Accessing strings for example in keys or values without having the lib create a copy of it. #1916

• operator== documentation should show how to apply custom comparison function #1915

• char8_t and std::u8string support #1914

• std::is_pod is deprecated in C++20 #1913

• Incomplete types reported by experimental GCC10 #1912

• Compile warnings on MSVC 14.2 #1911

• How to parse json file with type composition of std::optional and std::variant #1910

• why root_schema be implemented as unique_ptr in json-validator.cpp，could I use it as shared_ptr? #1908

• compile error in gcc-6.3.0 #1906

• Scalar constexpr is odr-used when used as json initializer #1905

• install Slack app #1904

• typo in a comment #1903

• Watch JSON variables in Debug #1902

• does Json sdk cares about dfc dfd utf8 issue? #1901

• Allow multiple line string value in JSON #1897

• Writing map to json file #1896

• Small documentation mistake #1895

• why static function parse cann't find in visual studio 2019 #1894

• Best way to handle json files with missing key value pairs. #1893

• accessing json object as multimap #1892

• What is the best way to parse vec3s into glm::vec3 #1891

• Get array of items without using vector #1890

• Build errors clang 11.0.0 on macOS 10.15.2 #1889

• Multiple arrays to vectors help #1888

• json::parse(begin, end) parse error on first character using uchar* #1887

• issue in free() #1886

• is_number_unsigned() returns false for positive integers int or 0 or 1 literals #1885

• MSVC build failure with /Zc:__cplusplus and C++17 #1883

• RFC 6901 op:replace & arrays #1882

• Problem with serialization of my custom template doubly-linked list #1881

• is_array() is True, but raise 'cannot use operator[] for object iterators' #1880

• Serialize dynamic array #1879

• Serialization of struct object. #1877

• warning:c4503 #1875

• Why are flattened empty objects/arrays not representable? #1874

• Container Overflow ASAN when using operator >> on an ifs #1873

• Sub-array to vector or map object? #1870

• WIP: QT cute type supports #1869

• Compiler flags to disable features and shrink code size #1868

• null strings #1867

• Struct with array of struct and __attribute__((packed)) #1866

• Best way to extract numbers in the string? #1865

• Displaying \?\Volume{guid} from string to json giving error #1864

• not working when compiling as x86 #1863

• Skipping evaluation of log line expressions with a macro, is it possible? #1862

• Suppress warnings #1861

• conflit with g++ compile option -mwindows #1860

• How to serialize nested classes to semi-flat JSON object? #1859

• Memory Requirement for large json file #1858

• Query a binary format BSON, CBOR, MessagePack, UBJSON #1856

• Documentation on operator[] behavior with missing keys #1855

• Problem in converting string into JSON; Can't parse successfully. #1854

• json.at_or_default(key, defaultval) #1852

• please improve the enum conversion documentation my example gist provided #1851

• Default value returned on ValueType nlohmann::basic_json::value const typename object\_t::key\_type& key, const ValueType& default\_value #1850

• Accounting for arbitrary precision numerical literals #1849

• While trying to make a simple array, I get a nested array instead #1848

• How to reuse the parser and serializer intermediate storage? #1847

• Too much content in json.hpp leads to slow compilation #1845

• Cannot read some data in json file #1843

• Precompiled JSON library? #1842

• Please change assert into throw(maybe) in line 17946 #1841

• JSON for modern C++ ECCN information #1840

• CI: reduce build time for Travis valgrind #1836

• How do I traverse a json object and add new elements into the hierarchy #1834

• Invalid UTF-8 byte at index 1: 0x65 #1831

• Serialize big data in json #1828

• Backslash '' in value causes exception #1827

• from_json for non default constructible class with dependency injection #1819

• Semi-frequent timeouts in test-unicode_all with 3.6.1 aarch64 #1816

• input_adapter not user extensible #1813

• crash at json::destroy on android #1812

• Logs are repeating while cmake #1809

• Add a the possibility to add dynamic json objects #1795

• Unnecessary test data file in the release #1790

• Add support for parse stack limiting #1788

• GCC -Wuseless-cast warnings #1777

• compilation issue with NVCC 9.0 #1773

• Unexpected behavior with fifo_map json when copy and append #1763

• Parse error #1761

• Assignment (using value()) to nonexistent element behaves differently on Xcode 8 vs Xcode 10 #1758

• Readme out of date #1756

• cmake_* tests don't use the build system's compiler #1747

• Static assertions for template type properties required #1729

• Use float and possibly half in json::to_cbor #1719

• json::from_cbor does not respect allow_exceptions = false when input is string literal #1715

• /Zc:__cplusplus leads to C2416 #1695

• unflatten vs objects with number-ish keys #1575

• A "thinner" source code tar as part of release? #1572

• Repository is almost 450MB #1497

• Substantial performance penalty caused by polymorphic input adapter #1457

• Move tests to a separate repo #1235

• reduce repos size #1185

• CMakeLists.txt in release zips? #1184

• Minimal branch? #1066

• Move test blobs to a submodule? #732

• Question

• Need to improve ignores.. #567

• Minimal repository current size very large #556

• For a header-only library you have to clone 214MB #482

• 17 MB / 90 MB repo size!? #96

• Improve parse_ubjson_fuzzer #2182 (tanuj208)

• Add input adapter tests #2178 (nlohmann)

• Fix warnings #2174 (nlohmann)

• Fix PR#1006 #2158 (dota17)

• Fix issue#1972 #2153 (dota17)

• Update URLs to HTTPS #2152 (TotalCaesar659)

• Fix Issue#1813: user defined input adapters #2145 (FrancoisChabot)

• Fix issue#1939: Cast character to unsigned for comparison #2144 (XyFreak)

• Fix issue#2142: readme: fix typo in CMake FetchContent example #2143 (quentin-dev)

• Respect allow_exceptions=false for binary formats #2140 (nlohmann)

• Fix issue 2112 #2137 (dota17)

• Add bleeding edge GCC to CI #2136 (aokellermann)

• Clean up implementation of binary type #2125 (nlohmann)

• Fixed a compilation error in MSVC #2121 (gistrec)

• Overwork CI #2119 (nlohmann)

• Fix warnings from Clang 10 and GCC 9 #2116 (nlohmann)

• Do not include <ciso646> when using C++17 #2115 (nlohmann)

• Fix issue#2086: disallow json::value_t type parameter in value() #2104 (dota17)

• Fix Coveralls integration #2100 (nlohmann)

• Add tests for binary values #2099 (nlohmann)

• Use external test data #2081 (nlohmann)

• Remove Doozer CI #2080 (nlohmann)

• Fix README.md. Missing ``` #2077 (ArthurSonzogni)

• Fix error message about invalid surrogate pairs #2076 (rmisev)

• Add CMake fetchcontent documentation and tests #2074 (ArthurSonzogni)

• Properly pass serialize_binary to dump function #2071 (nlohmann)

• Fix returning reference to local temporary object #2069 (nlohmann)

• updated wandbox link #2060 (alexandermyasnikov)

• Fix bug in diff function #2054 (nlohmann)

• Fix GCC compiler warnings #2053 (nlohmann)

• Fix Clang compiler warnings #2051 (nlohmann)

• Update doctest to 2.3.7 #2050 (nlohmann)

• Fix issue#1719 #2044 (dota17)

• Add missing testcase about NaN in unit-constructor1.cpp #2043 (dota17)

• Templatize basic_json constructor from json_ref #2034 (ArtemSarmini)

• Replace deprecated std::is_pod #2033 (nlohmann)

• Fixes #1971 memory leak in basic\_json::push\_back #2025 (ArtemSarmini)

• fix #1982:json_pointer.contains() exception is incorrectly raised #2019 (dota17)

• Update LICENSE.MIT #2010 (magamig)

• PR for #2006 to test in AppVeyor. #2008 (garethsb)

• Added wsjcpp.yml #2004 (sea-kg)

• fix error 'setw' is not a member of 'std' in Wandbox example #2002 (alexandermyasnikov)

• catch exceptions for json_pointer : ..../+99 #1990 (dota17)

• Modify the document about operator== #1984 (dota17)

• Rename argument array_index to array_indx in json_pointer methods #1980 (linev)

• README: Fix string representation of dumped json #1979 (alex-weej)

• fix warnings in serializer.hpp for VS2019 #1969 (dota17)

• Fix C26451 warnnings in to_chars.hpp #1967 (dota17)

• appveyor.yml: Compile and test with latest version for __cplusplus ma… #1958 (t-b)

• Fix typo in examples #1956 (dota17)

• templated input adapters #1950 (FrancoisChabot)

• Update README.md : add a FAQ about memory release #1933 (dota17)

• Some typos #1923 (Coeur)

• Fix link to parse function in README #1918 (kastiglione)

• Readme: Updated links to hunter repo & docs #1917 (jothepro)

• Adds instruction for using Build2's package manager #1909 (Klaim)

• Update README.md #1907 (pauljurczak)

• Fix warning: ignoring return value #1871 (sonulohani)

• docs: add central repository as conan source to readme #1857 (gocarlos)

• README: Package in MSYS2 renamed to nlohmann-json #1853 (podsvirov)

• Fix msvc warnings #1846 (MBalszun)

• Update tests that generate CMake projects to use main project's C++ compiler #1844 (Tridacnid)

• make CMake's version config file architecture-independent #1746 (uhoreg)

• Add binary type support to all binary file formats, as well as an internally represented binary type #1662 (OmnipotentEntity)

v3.7.3 (2019-11-17)

Full Changelog

• Project branches #1839

• Quadratic destruction complexity introduced in #1436 #1837

• Trying to open a file #1814

• Comparing data type with value_t::number_integer fails #1783

• CMake version config file is architecture-dependent #1697

• Fix quadratic destruction complexity #1838 (nickaein)

v3.7.2 (2019-11-10)

Full Changelog

• Segmentation fault in destructor in case of large inputs #1835

• type_name() is not consistent with type() #1833

• json::parse is not a member #1832

• How do you deal with json* ? #1829

• Combined find_package/add_subdirectory not linking libraries #1771

• example code for ifstream reading a json file results in no operator error #1766

• Warning: unsequenced modification and access to 'range' #1674

• Segmentation fault stack overflow due to unbounded recursion #1419

• Stack-overflow OSS-Fuzz 4234 #832

• Configure WhiteSource Bolt for GitHub #1830 (whitesource-bolt-for-github[bot])

• Prevent stackoverflow caused by recursive deconstruction #1436 (nickaein)

v3.7.1 (2019-11-06)

Full Changelog

• std::is_constructible is always true with tuple #1825

• Can't compile from_json(std::valarray<T>). #1824

• json class should have a get_or member function #1823

• NLOHMANN_JSON_SERIALIZE_ENUM macro capture's json objects by value #1822

• Parse fails when number literals start with zero #1820

• Weird behaviour of contains with json_pointer #1815

• strange behaviour with json_pointer and .contains() #1811

• Can #1695 be re-opened? #1808

• Merge two json objects #1807

• std::is_constructible<json, std::unordered_map<std::string, Data>> when to_json not defined #1805

• Private data on parsing #1802

• Capturing Line and Position when querying #1800

• json error on parsing DBL_MAX from string #1796

• De/Serialisation of vector of tupple object with nested obect need Help please #1794

• Output json is corrupted #1793

• variable name byte sometimes used as a #define #1792

• Can't read json file #1791

• Problems with special German letters #1789

• Support for trailing commas #1787

• json_pointer construction bug #1786

• Visual Studio 2017 warning #1784

• ciso646 header become obsolete #1782

• Migrate LGTM.com installation from OAuth to GitHub App #1781

• JSON comparison, contains and operator& #1778

• pass a json object to a class contructor adds an array around the object #1776

• 'Float' number_float_function_t template parameter name conflicts with C '#define Float float' #1775

• A weird building problem :-( #1774

• What is this json_ref? #1772

• Interoperability with other languages #1770

• Json dump #1768

• json_pointer<>::back() should be const #1764

• How to get value from array #1762

• Merge two jsons #1757

• Unable to locate nlohmann_jsonConfig.cmake #1755

• json.hpp won;t compile VS2019 CLR/CLI app but does in console app #1754

• Nested Json Objects

• remove/replace assert with exceptions #1752

• Add array support for update() function #1751

• Is there a reason the get_to method is defined in include/nlohmann/json.hpp but not in single_include/nlohmann/json.hpp? #1750

• how to validate json object before calling dump() #1748

• Unable to invoke accessors on json objects in lldb #1745

• Escaping string before parsing #1743

• Construction in a member initializer list using curly braces is set as 'array' #1742

• Read a subkey from json object #1740

• Serialize vector of glm:vec2 #1739

• Support nlohmann::basic_json::value with JSON_NOEXCEPTION #1738

• how to know the parse is error #1737

• How to check if a given key exists in a JSON object #1736

• Allow The Colon Key-Value Delimiter To Have A Space Before It [@ READ ONLY] #1735

• Allow Tail { "Key": "Value" } Comma [@ READ ONLY] #1734

• No-throw json::value() #1733

• JsonObject.dump() #1732

• basic_json has no member "parse" #1731

• Exception "type must be string, but is array" #1730

• json::contains usage to find a path #1727

• How to create JSON Object from my Structures of Data and Json File from that Object #1726

• please provide an API to read JSON from file directly. #1725

• How to modify a value stored at a key? #1723

• CMake not correctly finding the configuration package for 3.7.0 #1721

• name typo in the "spack package management" section of README.md #1720

• How to add json to another json? #1718

• json::parse() ubsan regression with v3.7.0 #1716

• What I am doing wrong?!? #1714

• Potential memory leak detected by Valgrind #1713

• json::parse is not thread safe? #1712

• static analysis alarm by cppcheck #1711

• The compilation time is slow #1710

• not linking properly with cmake #1709

• Error in dump() with int64_t minimum value #1708

• Crash on trying to deserialize json string on 3ds homebrew #1707

• Can't compile VS2019. 13 Errors #1706

• find an object that matches the search criteria #1705

• IntelliSense goes crazy on VS2019 #1704

• Installing on Ubuntu 16.04 #1703

• Where is json::parse now? #1702

• Forward header should't be amalgamated #1700

• Json support for Cmake version 2.8.12 #1699

• Intruisive scientific notation when using .dump(); #1698

• Is there support for automatic serialization/deserialization? #1696

• on MSVC dump() will hard crash for larger json #1693

• puzzled implicit conversions #1692

• Information: My project uses this awesome library #1691

• Consider listing files explicitly instead of using GLOB #1686

• Failing tests on MSVC with VS2019 15.9.13 x64 #1685

• Consider putting the user-defined literals in a namespace #1682

• Change from v2 to v3. Encoding with cp1252 #1680

• How to add Fifo_map into json using Cmake #1679

• include.zip should contain meson.build #1672

• Question

• Binary 0x05 data type for BSON to JSON conversion #1668

• Possible to call dump from lldb? #1666

• Segmentation fault when linked with libunwind #1665

• Should I include single-header after my to_json and from_json custom functions declaration? Why not? #1663

• Errors/Warnings in VS 2019 when Including Header File #1659

• Return null object from object's const operator[] as well. #1658

• Can't stream json object in to std::basic_stringstream<wchar_t> #1656

• C2440 in vs2015 cannot convert from 'initializer-list' to nlohmann::basic_json #1655

• Issues around get and pointers #1653

• Non-member operator== breaks enum (de)serialization #1647

• Valgrind: bytes in 1 blocks are definitely lost #1646

• Convenient way to make 'basic_json' accept 'QString' as an key type as well? #1640

• mongodb: nan, inf #1599

• Error in adl_serializer #1590

• Injecting class during serialization #1584

• output_adapter not user extensible #1534

• Inclusion of nlohmann/json.hpp causes OS/ABI to change on Linux #1410

• Add library versioning using inline namespaces #1394

• CBOR byte string support #1129

• How to deserialize array with derived objects #716

• Add restriction for tuple specialization of to_json #1826 (cbegue)

• Fix for #1647 #1821 (AnthonyVH)

• Fix issue #1805 #1806 (cbegue)

• Fix some spelling errors - mostly in comments & documentation. #1803 (flopp)

• Update Hedley to v11. #1799 (nemequ)

• iteration_proxy: Fix integer truncation from std::size_t to int #1797 (t-b)

• appveyor.yml: Add MSVC 16 2019 support #1780 (t-b)

• test/CMakeLists.txt: Use an explicit list instead of GLOB #1779 (t-b)

• Make json_pointer::back const resolves \#1764 #1769 (chris0x44)

• did you mean 'serialization'? #1767 (0xflotus)

• Allow items() to be used with custom string #1765 (crazyjul)

• Cppcheck fixes #1760 (Xav83)

• Fix and add test's for SFINAE problem #1741 (tete17)

• Fix clang sanitizer invocation #1728 (t-b)

• Add gcc 9 and compile with experimental C++20 support #1724 (t-b)

• Fix int64 min issue #1722 (t-b)

• release: add singleinclude and meson.build to include.zip #1694 (eli-schwartz)

v3.7.0 (2019-07-28)

Full Changelog

• How can I retrieve uknown strings from json file in my C++ program. #1684

• contains() is sometimes causing stack-based buffer overrun exceptions #1683

• How to deserialize arrays from json #1681

• Compilation failed in VS2015 #1678

• Why the compiled object file is so huge? #1677

• From Version 2.1.1 to 3.6.1 serialize std::set #1676

• Qt deprecation model halting compiltion #1675

• Build For Raspberry pi , Rapbery with new Compiler C++17 #1671

• Build from Raspberry pi #1667

• Can not translate map with integer key to dict string ? #1664

• Double type converts to scientific notation #1661

• Missing v3.6.1 tag on master branch #1657

• Support Fleese Binary Data Format #1654

• Suggestion: replace alternative tokens for !, && and || with their symbols #1652

• Build failure test-allocator.vcxproj #1651

• How to provide function json& to_json() which is similar as 'void to_json(json&j, const CObject& obj)' ? #1650

• Can't throw exception when starting file is a number #1649

• to_json / from_json with nested type #1648

• How to create a json object from a std::string, created by j.dump? #1645

• Problem getting vector array of strings #1644

• json.hpp compilation issue with other typedefs with same name #1642

• nlohmann::adl_serializer<T,void>::to_json no matching overloaded function found #1641

• overwrite adl_serializer<bool, void> to change behaviour #1638

• json.SelectToken("Manufacturers.Products.Price"); #1637

• Add json type as value #1636

• Unit conversion test error: conversion from 'nlohmann::json' to non-scalar type 'std::string_view' requested #1634

• nlohmann VS JsonCpp by C++17 #1633

• To integrate an inline helper function that return type name as string #1632

• Return JSON as reference #1631

• Updating from an older version causes problems with assing a json object to a struct #1630

• Can without default constructor function for user defined classes when only to_json is needed? #1629

• Compilation fails with clang 6.x-8.x in C++14 mode #1628

• Treating floating point as string #1627

• error parsing character å #1626

• Help

• Suggested link changes for reporting new issues [blob/develop/REAME.md and blob/develop/.github/CONTRIBUTING.md] #1623

• Broken link to issue template in CONTRIBUTING.md #1622

• Missing word in README.md file #1621

• Package manager instructions in README for brew is incorrect #1620

• Building with Visual Studio 2019 #1619

• Precedence of to_json and builtin harmful #1617

• The type json is missing from the html documentation #1616

• variant is not support in Release 3.6.1? #1615

• Replace assert with throw for const operator[] #1614

• Memory Overhead is Too High 10x or more #1613

• program crash everytime, when other data type incomming in json stream as expected #1612

• Improved Enum Support #1611

• is it possible convert json object back to stl container ? #1610

• Add C++17-like emplace.back() for arrays. #1609

• is_nothrow_copy_constructible fails for json::const_iterator on MSVC2015 x86 Debug build #1608

• Reading and writing array elements #1607

• Converting json::value to int #1605

• I have a vector of keys and and a string of value and i want to create nested json array #1604

• In compatible JSON object from nlohmann::json to nohman::json - unexpected end of input; expected '[', '{', or a literal #1603

• json parser crash if having a large number integer in message #1602

• Value method with undocumented throwing 302 exception #1601

• Accessing value with json pointer adds key if not existing #1600

• README.md broken link to project documentation #1597

• Random Kudos: Thanks for your work on this! #1596

• json::parse return value and errors #1595

• initializer list constructor makes curly brace initialization fragile #1594

• trying to log message for missing keyword, difference between ["foo"] and at("foo") #1593

• std::string and std::wstring to_json #1592

• I have a C structure which I need to convert to a JSON. How do I do it? Haven't found proper examples so far. #1591

• dump_escaped possible error ? #1589

• json::parse() into a vector<string> results in unhandled exception #1587

• push_back()/emplace_back() on array invalidates pointers to existing array items #1586

• Getting nlohmann::detail::parse_error on JSON generated by nlohmann::json not sure why #1583

• getting error terminate called after throwing an instance of 'std::domain_error' what(): cannot use at() with string #1582

• how i create json file #1581

• prevent rounding of double datatype values #1580

• Documentation Container Overview Doesn't Reference Const Methods #1579

• Writing an array into a nlohmann::json object #1578

• compilation error when using with another library #1577

• Homebrew on OSX doesn't install cmake config file #1576

• JSON Parse Out of Range Error #1574

• Integrating into existing CMake Project #1573

• conversion to std::string failed #1571

• jPtr operation does not throw #1569

• How to generate dll file for this project #1568

• how to pass variable data to json in c #1567

• I want to achieve an upgraded function. #1566

• How to determine the type of elements read from a JSON array? #1564

• try_get_to #1563

• example code compile error #1562

• How to iterate over nested json object #1561

• Build Option/Separate Function to Allow to Throw on Duplicate Keys #1560

• Compiler Switches -Weffc++ & -Wshadow are throwing errors #1558

• warning: use of the 'nodiscard' attribute is a C++17 extension #1557

• Import/Export compressed JSON files #1556

• GDB renderers for json library #1554

• Is it possible to construct a json string object from a binary buffer? #1553

• json objects in list #1552

• Matrix output #1550

• Using json merge_patch on ordered non-alphanumeric datasets #1549

• Invalid parsed value for big integer #1548

• Integrating with android ndk issues. #1547

• add noexcept json::value("key", default) method variant? #1546

• Thank you! 🙌 #1545

• Output and input matrix #1544

• Add regression tests for MSVC #1543

• Help Needed!

• program still abort() or exit() with try catch #1541

• Have a json::type_error exception because of JSON object #1540

• Using versioned namespaces #1539

• Quoted numbers #1538

• Reading a JSON file into an object #1537

• Releases 3.6.0 and 3.6.1 don't build on conda / windows #1536

• Clang

• wchar_t/std::wstring json can be created but not accessed #1533

• json stringify #1532

• How can I use it from gcc on RPI #1528

• std::pair treated as an array instead of key-value in std::vector<std::pair<>> #1520

• Excessive Memory Usage for Large Json File #1516

• SAX dumper #1512

• Conversion to user type containing a std::vector not working with documented approach #1511

• Inconsistent use of type alias. #1507

• Is there a current way to represent strings as json int? #1503

• Intermittent issues with loadJSON #1484

• use json construct std::string #1462

• JSON Creation #1461

• Null bytes in files are treated like EOF #1095

• Feature: to_string(const json& j); #916

• Use GNUInstallDirs instead of hard-coded path. #1673 (ghost)

• Package Manager: MSYS2 pacman #1670 (podsvirov)

• Fix json.hpp compilation issue with other typedefs with same name Issue \#1642 #1643 (kevinlul)

• Add explicit conversion from json to std::string_view in conversion unit test #1639 (taylorhoward92)

• Minor fixes in docs #1625 (nickaein)

• Fix broken links to documentation #1598 (nickaein)

• Added to_string and added basic tests #1585 (Macr0Nerd)

• Regression tests for MSVC #1570 (nickaein)

• Fix/1511 #1555 (theodelrieu)

• Remove C++17 extension warning from clang; #1535 #1551 (heavywatal)

• moved from Catch to doctest for unit tests #1439 (onqtam)

v3.6.1 (2019-03-20)

Full Changelog

3.6.1 (2019-03-20)

Full Changelog

• Failed to build with <Windows.h> #1531
• Compiling 3.6.0 with GCC > 7, array vs std::array #590 is back #1530
• 3.6.0: warning: missing initializer for member 'std::array<char, 9ul>::_M_elems' [-Wmissing-field-initializers] #1527
• unable to parse json #1525

v3.6.0 (2019-03-19)

Full Changelog

• How can I turn a string of a json array into a json array? #1526

• Minor: missing a std:: namespace tag #1521

• how to precision to four decimal for double when use to_json #1519

• error parse #1518

• Compile error: template argument deduction/substitution failed #1515

• std::complex type #1510

• CBOR byte string support #1509

• Compilation error getting a std::pair<> on latest VS 2017 compiler #1506

• "Integration" section of documentation needs update? #1505

• Json object from string from a TCP socket #1504

• MSVC warning C4946 "reinterpret\_cast used between related classes" compiling json.hpp #1502

• How to programmatically fill an n-th dimensional JSON object? #1501

• Error compiling with clang and JSON_NOEXCEPTION: need to include cstdlib #1500

• The code compiles unsuccessfully with android-ndk-r10e #1499

• Cmake 3.1 in develop, when is it likely to make it into a stable release? #1498

• Some Help please object inside array #1494

• How to get data into vector of user-defined type from a Json object #1493

• how to find subelement without loop #1490

• json to std::map #1487

• Type in README.md #1486

• Error in parsing and reading msgpack-lite #1485

• Compiling issues with libc 2.12 #1483

• How do I use reference or pointer binding values? #1482

• Compilation fails in MSVC with the Microsoft Language Extensions disabled #1481

• Functional visit #1480

• Question

• Some Help please #1478

• Global variables are stored within the JSON file, how do I declare them as global variables when I read them out in my C++ program? #1476

• Unable to modify one of the values within the JSON file, and save it #1475

• Documentation of parse function has two identical @pre causes #1473

• GCC 9.0 build failure #1472

• Can we have an exists() method? #1471

• How to parse multi object json from file? #1470

• How to returns the name of the upper object? #1467

• Error: "tuple_size" has already been declared in the current scope #1466

• Checking keys of two jsons against eachother #1465

• Disable installation when used as meson subproject #1463

• Unpack list of integers to a std::vector<int> #1460

• Implement DRY definition of JSON representation of a c++ class #1459

• json.exception.type_error.305 with GCC 4.9 when using C++ {} initializer #1458

• API to convert an "uninitialized" json into an empty object or empty array #1456

• How to parse a vector of objects with const attributes #1453

• NLOHMANN_JSON_SERIALIZE_ENUM potentially requires duplicate definitions #1450

• Question about making json object from file directory #1449

• .get() throws error if used with userdefined structs in unordered_map #1448

• Integer Overflow OSS-Fuzz 12506 #1447

• If a string has too many invalid UTF-8 characters, json::dump attempts to index an array out of bounds. #1445

• Setting values of .JSON file #1444

• alias object_t::key_type in basic_json #1442

• Latest Ubuntu package is 2.1.1 #1438

• lexer.hpp(1363) '_snprintf': is not a member | Visualstudio 2017 #1437

• Static method invites inadvertent logic error. #1433

• EOS compilation produces "fatal error: 'nlohmann/json.hpp' file not found" #1432

• Support for bad commas #1429

• Please have one base exception class for all json exceptions #1427

• Compilation warning: 'tuple_size' defined as a class template here but previously declared as a struct template #1426

• Which version can be used with GCC 4.8.2 ? #1424

• Ignore nullptr values on constructing json object from a container #1422

• Support for custom float precision via unquoted strings #1421

• It is possible to call json::find with a json_pointer as argument. This causes runtime UB/crash. #1418

• Dump throwing exception #1416

• Build error #1415

• Append version to include.zip #1412

• error C2039: '_snprintf': is not a member of 'std' - Windows #1408

• Deserializing to vector #1407

• Efficient way to set a json object as value into another json key #1406

• Document return value of parse() when allow_exceptions == false and parsing fails #1405

• Unexpected behaviour with structured binding #1404

• Which native types does get<type> allow? #1403

• Add something like Json::StaticString #1402

• -Wmismatched-tags in 3.5.0? #1401

• Coverity Scan reports an UNCAUGHT_EXCEPT issue #1400

• fff #1399

• sorry this is not an issue, just a Question, How to change a key value in a file and save it ? #1398

• appveyor x64 builds appear to be using Win32 toolset #1374

• Serializing/Deserializing a Class containing a vector of itself #1373

• Retrieving array elements. #1369

• Deserialize #1366

• call of overloaded for push_back and operator+= is ambiguous #1352

• got an error and cann't figure it out #1351

• Improve number-to-string conversion #1334

• Implicit type conversion error on MSVC #1333

• NuGet Package #1132

• Change macros to numeric_limits #1514 (naszta)

• fix GCC 7.1.1 - 7.2.1 on CentOS #1496 (lieff)

• Update Buckaroo instructions in README.md #1495 (njlr)

• Fix gcc9 build error test/src/unit-allocator.cpp Issue \#1472 #1492 (stac47)

• Fix typo in README.md #1491 (nickaein)

• Do proper endian conversions #1489 (andreas-schwab)

• Fix documentation #1477 (nickaein)

• Implement contains() member function #1474 (nickaein)

• Add operator/= and operator/ to construct a JSON pointer by appending two JSON pointers #1469 (garethsb)

• Disable Clang -Wmismatched-tags warning on tuple_size / tuple_element #1468 (past-due)

• Disable installation when used as meson subproject. #1463 #1464 (elvisoric)

• docs: README typo #1455 (wythe)

• remove extra semicolon from readme #1451 (Afforix)

• attempt to fix #1445, flush buffer in serializer::dump_escaped in UTF8_REJECT case. #1446 (scinart)

• Use C++11 features supported by CMake 3.1. #1441 (iwanders)

• 🚨 fixed unused variable warning #1435 (pboettch)

• allow push_back() and pop_back() calls on json_pointer #1434 (pboettch)

• Add instructions about using nlohmann/json with the conda package manager #1430 (nicoddemus)

• Updated year in README.md #1425 (jef)

• Fixed broken links in the README file #1423 (skypjack)

• Fixed broken links in the README file #1420 (skypjack)

• docs: typo in README #1417 (wythe)

• Fix x64 target platform for appveyor #1414 (nickaein)

• Improve dump_integer performance #1411 (nickaein)

• buildsystem: relax requirement on cmake version #1409 (yann-morin-1998)

• CMake: Optional Install if Embedded #1330 (ax3l)

v3.5.0 (2018-12-21)

Full Changelog

• Copyconstructor inserts original into array with single element #1397

• Get value without explicit typecasting #1395

• Big file parsing #1393

• some static analysis warning at line 11317 #1390

• Adding Structured Binding Support #1388

• map<json::value_t, string> exhibits unexpected behavior #1387

• Error Code Return #1386

• using unordered_map as object type #1385

• float precision #1384

• json.exception.type\_error.316

• Inconsistent Constructor GCC vs. Clang #1381

• #define or || #1379

• How to iterate inside the values ? #1377

• items() unable to get the elements #1375

• conversion json to std::map doesn't work for types <int, double> #1372

• A minor issue in the build instructions #1371

• Using this library without stream ? #1370

• Writing and reading BSON data #1368

• Retrieving array elements from object type iterator. #1367

• json::dump() silently crashes if items contain accented letters #1365

• warnings in MSVC 2015 in 3.4.0 related to bool... #1364

• Cant compile with -C++17 and beyond compiler options #1362

• json to concrete type conversion through reference or pointer fails #1361

• the first attributes of JSON string is misplaced #1360

• Copy-construct using initializer-list converts objects to arrays #1359

• About value(key, default_value) and operator[]key #1358

• Problem with printing json response object #1356

• Serializing pointer segfaults #1355

• Read long long int data as a number. #1354

• eclipse oxygen in ubuntu get<size_t> is ambiguous #1353

• Can't build on Visual Studio 2017 v15.8.9 #1350

• cannot parse from string? #1349

• Error: out_of_range #1348

• expansion pattern 'CompatibleObjectType' contains no argument packs, with CUDA 10 #1347

• Unable to update a value for a nested(multi-level) json file #1344

• Fails to compile when std::iterator_traits is not SFINAE friendly. #1341

• EOF flag not set on exhausted input streams. #1340

• Shadowed Member in merge_patch #1339

• Periods/literal dots in keys? #1338

• Protect macro expansion of commonly defined macros #1337

• How to validate an input before parsing? #1336

• Non-verifying dump() alternative for debugging/logging needed #1335

• Json Libarary is not responding for me in c++ #1332

• Question - how to find an object in an array #1331

• Nesting additional data in json object #1328

• can to_json() be defined inside a class? #1324

• CodeBlocks IDE can't find json.hpp header #1318

• Change json_pointer to provide an iterator begin/end/etc, don't use vectors, and also enable string_view #1312

• Xcode - adding it to library #1300

• unicode: accept char16_t, char32_t sequences #1298

• unicode: char16_t* is compiler error, but char16_t[] is accepted #1297

• Dockerfile Project Help Needed #1296

• Comparisons between large unsigned and negative signed integers #1295

• CMake alias to nlohmann::json #1291

• Release zips without tests #1285

• separate object_t::key_type from basic_json::key_type, and use an allocator which returns object_t::key_type #1274

• Is there a nice way to associate external values with json elements? #1256

• Delete by json_pointer #1248

• Expose lexer, as a StAX parser #1219

• Subclassing json() & error on recursive load #1201

• Check value for existence by json_pointer #1194

• Feature/add file input adapter #1392 (dumarjo)

• Added Support for Structured Bindings #1391 (pratikpc)

• Link to issue #958 broken #1382 (kjpus)

• readme: fix typo #1380 (manu-chroma)

• recommend using explicit from JSON conversions #1363 (theodelrieu)

• Fix merge_patch shadow warning #1346 (ax3l)

• Allow installation via Meson #1345 (mpoquet)

• Set eofbit on exhausted input stream. #1343 (mefyl)

• Add a SFINAE friendly iterator_traits and use that instead. #1342 (dgavedissian)

• Fix EOL Whitespaces & CMake Spelling #1329 (ax3l)

v3.4.0 (2018-10-30)

Full Changelog

• Big uint64_t values are serialized wrong #1327

• Question

• Can't use ifstream and .clear() #1321

• Warning

• Compilation error using at and find with enum struct #1316

• Parsing JSON from a web address #1311

• How to convert JSON to Struct with embeded subject #1310

• Null safety/coalescing function? #1309

• Building fails using single include file: json.hpp #1308

• json::parse(std::string) Exception inside packaged Lib #1306

• Problem in Dockerfile with installation of library #1304

• compile error in from_json converting to container with std::pair #1299

• Json that I am trying to parse, and I am lost Structure Array below top level #1293

• Serializing std::variant causes stack overflow #1292

• How do I go about customising from_json to support __int128_t/__uint128_t? #1290

• merge_patch: inconsistent behaviour merging empty sub-object #1289

• Buffer over/underrun using UBJson? #1288

• Enable the latest C++ standard with Visual Studio #1287

• truncation of constant value in to_cbor() #1286

• eosio.wasmsdk error #1284

• use the same interface for writing arrays and non-arrays #1283

• How to read json file with optional entries and entries with different types #1281

• merge result not as espected #1279

• how to get only "name" from below json #1278

• syntax error on right json string #1276

• Parsing JSON Array where members have no key, using custom types #1267

• I get a json exception periodically from json::parse for the same json #1263

• serialize std::variant<...> #1261

• GCC 8.2.1. Compilation error: invalid conversion from... #1246

• BSON support #1244

• enum to json mapping #1208

• Soften the landing when dumping non-UTF8 strings type\_error.316 exception #1198

• Add macro to define enum/JSON mapping #1323 (nlohmann)

• Add BSON support #1320 (nlohmann)

• Properly convert constants to CharType #1315 (nlohmann)

• Allow to set error handler for decoding errors #1314 (nlohmann)

• Add Meson related info to README #1305 (koponomarenko)

• Improve diagnostic messages for binary formats #1303 (nlohmann)

• add new is_constructible_* traits used in from_json #1301 (theodelrieu)

• add constraints for variadic json_ref constructors #1294 (theodelrieu)

• Improve diagnostic messages #1282 (nlohmann)

• Removed linter warnings #1280 (nlohmann)

• Thirdparty benchmark: Fix Clang detection. #1277 (Lord-Kamina)

v3.3.0 (2018-10-05)

Full Changelog

• Fix warning C4127: conditional expression is constant #1272 (antonioborondo)
• Turn off additional deprecation warnings for GCC. #1271 (chuckatkins)
• docs: Add additional CMake documentation #1270 (chuckatkins)
• unit-testsuites.cpp: fix hangup if file not found #1262 (knilch0r)
• Fix broken cmake imported target alias #1260 (chuckatkins)
• GCC 48 #1257 (henryiii)
• Add version and license to meson.build #1252 (koponomarenko)
• #1179 Reordered the code. It seems to stop clang 3.4.2 in RHEL 7 from crash… #1249 (LEgregius)
• Use a version check to provide backwards comatible CMake imported target names #1245 (chuckatkins)
• Fix issue #1237 #1238 (theodelrieu)
• Add a get overload taking a parameter. #1231 (theodelrieu)
• Move lambda out of unevaluated context #1230 (mandreyel)
• Remove static asserts #1228 (theodelrieu)
• Better error 305 #1221 (rivertam)
• Fix #1213 #1214 (simnalamburt)
• Export package to allow builds without installing #1202 (dennisfischer)

3.3.0 (2018-10-05)

Full Changelog

• When key is not found print the key name into error too #1273
• Visual Studio 2017 15.8.5 "conditional expression is constant" warning on Line 1851 in json.hpp #1268
• how can we get this working on WSL? #1264
• Help needed #1259
• A way to get to a JSON values "key" #1258
• While compiling got 76 errors #1255
• Two blackslashes on json output file #1253
• Including nlohmann the badwrong way. #1250
• how to build with clang? #1247
• Cmake target_link_libraries unable to find nlohmann_json since version 3.2.0 #1243

• Question

• Parsing different json format #1241
• Parsing Multiple JSON Files #1240
• Doesn't compile under C++17 #1239
• Conversion operator for nlohmann::json is not SFINAE friendly #1237
• Custom deserialization of number_float_t #1236
• deprecated-declarations warnings when compiling tests with GCC 8.2.1. #1233
• Incomplete type with json_fwd.hpp #1232
• Parse Error #1229
• json::get function with argument #1227
• questions regarding from_json #1226
• Lambda in unevaluated context #1225
• NLohmann doesn't compile when enabling strict warning policies #1224
• Creating array of objects #1223
• Somewhat unhelpful error message "cannot use operator[] with object" #1220
• single_include json.hpp #1218
• Maps with enum class keys which are convertible to JSON strings should be converted to JSON dictionaries #1217
• Adding JSON Array to the Array #1216
• Best way to output a vector of a given type to json #1215
• compiler warning: double definition of macro JSON_INTERNAL_CATCH #1213
• Compilation error when using MOCK_METHOD1 from GMock and nlohmann::json #1212
• Issues parsing a previously encoded binary non-UTF8 string. #1211
• Yet another ordering question: char * and parse() #1209
• Error using gcc 8.1.0 on Ubuntu 14.04 #1207
• "type must be string, but is " std::string(j.type_name() #1206
• Returning empty json object from a function of type const json& ? #1205
• VS2017 compiler suggests using constexpr if #1204
• Template instatiation error on compiling #1203
• BUG - json dump field with unicode -> array of ints instead of string #1197
• Compile error using Code::Blocks // mingw-w64 GCC 8.1.0 - "Incomplete Type" #1193
• SEGFAULT on arm target #1190
• Compiler crash with old Clang #1179
• Custom Precision on floating point numbers #1170
• Can we have a json_view class like std::string_view? #1158
• improve error handling #1152
• We should remove static_asserts #960

v3.2.0 (2018-08-20)

Full Changelog

• Fix -Wno-sometimes-uninitialized by initializing "result" in parse_sax #1200 (thyu)

• RFC

• Fix unit tests that were silently skipped or crashed depending on the compiler #1176 (grembo)
• Refactor/no virtual sax #1153 (theodelrieu)
• Fixed compiler error in VS 2015 for debug mode #1151 (sonulohani)
• Fix links to cppreference named requirements formerly concepts #1144 (jrakow)
• meson: fix include directory #1142 (jrakow)
• Feature/unordered map conversion #1138 (theodelrieu)
• fixed compile error for #1045 #1134 (Daniel599)
• test (non)equality for alt_string implementation #1130 (agrianius)
• remove stringstream dependency #1117 (TinyTinni)
• Provide a from_json overload for std::map #1089 (theodelrieu)
• fix typo in README #1078 (martin-mfg)
• Fix typo #1058 (dns13)
• Misc cmake packaging enhancements #1048 (chuckatkins)
• Fixed incorrect LLVM version number in README #1047 (jammehcow)
• Fix trivial typo in comment. #1043 (coryan)
• Package Manager: Spack #1041 (ax3l)
• CMake: 3.8+ is Sufficient #1040 (ax3l)
• Added support for string_view in C++17 #1028 (gracicot)
• Added public target_compile_features for auto and constexpr #1026 (ktonon)

3.2.0 (2018-08-20)

Full Changelog

• Am I doing this wrong? Getting an empty string #1199
• Incompatible Pointer Type #1196
• json.exception.type_error.316 #1195
• Strange warnings in Code::Blocks 17.12, GNU GCC #1192

• Question

• Add key name when throwing type error #1189
• Not able to include in visual studio code? #1188
• Get an Index or row number of an element #1186
• Difference between merge_patch and update #1183
• Is there a way to get an element from a JSON without throwing an exception on failure? #1182
• to_string? #1181
• How to cache a json object's pointer into a map? #1180
• Can this library work within a Qt project for Android using Qt Creator? #1178
• How to get all keys of one object? #1177
• How can I only parse the first level and get the value as string? #1175
• I have a query regarding nlohmann::basic_json::basic_json #1174
• unordered_map with vectors won't convert to json? #1173
• return json objects from functions #1172
• Problem when exporting to CBOR #1171
• Roundtripping null to nullptr does not work #1169
• MSVC fails to compile std::swap specialization for nlohmann::json #1168
• Unexpected behaviour of is_null - Part II #1167
• Floating point imprecision #1166
• Combine json objects into one? #1165
• Is there any way to know if the object has changed? #1164
• Value throws on null string #1163
• Weird template issue in large project #1162
• _json returns a different result vs ::parse #1161
• Showing difference between two json objects #1160
• no instance of overloaded function "std::swap" matches the specified type #1159
• resize(...)? #1157
• Issue with struct nested in class' to_json #1155
• Deserialize std::map with std::nan #1154
• Parse throwing errors #1149
• cocoapod integration #1148
• wstring parsing #1147
• Is it possible to dump a two-dimensional array to "null],[1,2,3"? #1146
• Want to write a class member variable and a struct variable this structure is inside the class to the json file #1145
• Does json support converting an instance of a struct into json string? #1143
• #Most efficient way to search for child parameters recursive find? #1141
• could not find to_json() method in T's namespace #1140
• chars get treated as JSON numbers not JSON strings #1139
• How do I count number of objects in array? #1137
• Serializing a vector of classes? #1136
• Compile error. Unable convert form nullptr to nullptr&& #1135
• std::unordered_map in struct, serialization #1133
• dump() can't handle umlauts #1131
• Add a way to get a key reference from the iterator #1127
• can't not parse "\“ string #1123
• if json file contain Internationalization chars , get exception #1122
• How to use a json::iterator dereferenced value in code? #1120
• Disable implicit conversions from json to std::initializer_list<T> for any T #1118
• Implicit conversions to complex types can lead to surprising and confusing errors #1116
• How can I write from_json for a complex datatype that is not default constructible? #1115
• Compile error in VS2015 when compiling unit-conversions.cpp #1114
• ADL Serializer for std::any / boost::any #1113
• Unexpected behaviour of is_null #1112
• How to resolve " undefined reference to `std::__throw_bad_cast()'" #1111
• cannot compile on ubuntu 18.04 and 16.04 #1110
• JSON representation for floating point values has too many digits #1109
• Not working for classes containing "_declspec(dllimport)" in their declaration #1108
• Get keys from json object #1107
• Cannot deserialize types using std::ratio #1105
• i want to learn json #1104
• Type checking during compile #1103
• Iterate through sub items #1102
• cppcheck failing for version 3.1.2 #1101
• Deserializing std::map #1100
• accessing key by reference #1098
• clang 3.8.0 croaks while trying to compile with debug symbols #1097
• Serialize a list of class objects with json #1096
• Small question #1094
• Upgrading to 3.x: to_/from_json with enum class #1093
• Q: few questions about json construction #1092
• general crayCC compilation failure #1091
• Merge Patch clears original data #1090

• Question

• C++17 decomposition declaration support #1087

• Question

• Serializing vector #1085
• update nested value in multi hierarchy json object #1084
• Overriding default values? #1083
• detail namespace collision with Cereal? #1082
• Error using json.dump(); #1081
• Consuming TCP Stream #1080
• Compilation error with strong typed enums in map in combination with namespaces #1079
• cassert error #1076
• Valid json data not being parsed #1075
• Feature request :: Better testing for key existance without try/catch #1074
• Hi, I have input like a.b.c and want to convert it to "a"{"b": "c"} form. Any suggestions how do I do this? Thanks. #1073
• ADL deserializer not picked up for non default-constructible type #1072
• Deserializing std::array doesn't compiler (no insert()) #1071
• Serializing OpenCV Mat problem #1070
• Compilation error with ICPC compiler #1068
• Not existing value, crash #1065
• cyryllic symbols #1064
• newbie usage question #1063
• Trying j["strTest"] = "%A" produces "strTest": "-0X1.CCCCCCCCCCCCCP+205" #1062
• convert json value to std::string??? #1061
• Commented out test cases, should they be removed? #1060
• different behaviour between clang and gcc with braced initialization #1059
• json array: initialize with prescribed size and resize method. #1057
• Is it possible to use exceptions istead of assertions? #1056
• when using assign operator in with json object a static assertion fails.. #1055
• Iterate over leafs of a JSON data structure: enrich the JSON pointer API #1054

• Feature request

• document that implicit js -> primitive conversion does not work for std::string::value_type and why #1052
• error: ‘BasicJsonType’ in namespace ‘::’ does not name a type #1051
• Destructor is called when filling object through assignement #1050
• Is this thing thread safe for reads? #1049
• clang-tidy: Call to virtual function during construction #1046
• Using STL algorithms with JSON containers with expected results? #1045
• Usage with gtest/gmock not working as expected #1044
• Consequences of from_json / to_json being in namespace of data struct. #1042
• const_reference operator[]const typename object\_t::key\_type& key const throw instead of assert #1039
• Trying to retrieve data from nested objects #1038
• Direct download link for json_fwd.hpp? #1037
• I know the library supports UTF-8, but failed to dump the value #1036
• Putting a Vec3-like vector into a json object #1035
• Ternary operator crash #1034
• Issued with Clion Inspection Resolution since 2018.1 #1033
• Some testcases fail and one never finishes #1032
• Can this class work with wchar_t / std::wstring? #1031
• Makefile: Valgrind flags have no effect #1030
• 「==」 Should be 「>」 #1029
• HOCON reader? #1027
• add json string in previous string?? #1025
• RFC: fluent parsing interface #1023
• Does it support chinese character? #1022
• to/from_msgpack only works with standard typization #1021
• Build failure using latest clang and GCC compilers #1020
• can two json objects be concatenated? #1019
• Erase by integer index #1018
• Function find overload taking a json_pointer #1017
• I think should implement an parser function #1016
• Readme gif #1015
• Python bindings #1014
• how to add two json string in single object?? #1012
• how to serialize class Object convert data in object into json?? #1011
• Enable forward declaration of json by making json a class instead of a using declaration #997
• compilation error while using intel c++ compiler 2018 #994
• How to create a json variable? #990
• istream >> json --- 1st character skipped in stream #976
• Add a SAX parser #971
• How to solve large json file? #927
• json_pointer public push_back, pop_back #837
• Using input_adapter in a slightly unexpected way #834

v3.1.2 (2018-03-14)

Full Changelog

• Allowing for user-defined string type in lexer/parser #1009 (nlohmann)
• dump to alternative string type, as defined in basic_json template #1006 (agrianius)
• Fix memory leak during parser callback #1001 (nlohmann)
• fixed misprinted condition detected by PVS Studio. #992 (bogemic)
• Fix/basic json conversion #986 (theodelrieu)
• Make integration section concise #981 (wla80)

3.1.2 (2018-03-14)

Full Changelog

• STL containers are always serialized to a nested array like 1,2,3 #1013
• The library doesn't want to insert an unordered_map #1010
• Convert Json to uint8_t #1008
• How to compare two JSON objects? #1007
• Syntax checking #1003
• more than one operator '=' matches these operands #1002
• How to check if key existed #1000
• nlohmann::json::parse exhaust memory in go binding #999
• Range-based iteration over a non-array object #998
• get<T> for types that are not default constructible #996
• Prevent Null values to appear in .dump() #995
• number parsing #993
• C2664 C++/CLR cannot convert 'nullptr' to 'nullptr &&' #987
• Uniform initialization from another json object differs between gcc and clang. #985
• Problem with adding the lib as a submodule #983
• UTF-8/Unicode error #982
• "forcing MSVC stacktrace to show which T we're talking about." error #980
• reverse order of serialization #979
• Assigning between different json types #977
• Support serialisation of unique_ptr<> and shared_ptr<> #975
• Unexpected end of input not same as one before #974
• Segfault on direct initializing json object #973
• Segmentation fault on G++ when trying to assign json string literal to custom json type. #972
• os_defines.h:44:19: error: missing binary operator before token "(" #970
• Passing an iteration object by reference to a function #967
• Json and fmt::lib's format_arg() #964

v3.1.1 (2018-02-13)

Full Changelog

• Updation of child object isn't reflected in parent Object #968

• How to add user defined C++ path to sublime text #966

• fast number parsing #965

• With non-unique keys, later stored entries are not taken into account anymore #963

• Timeout OSS-Fuzz 6034 #962

• Incorrect parsing of indefinite length CBOR strings. #961

• Reload a json file at runtime without emptying my std::ifstream #959

• Split headers should be part of the release #956

• Coveralls shows no coverage data #953

• Feature request: Implicit conversion to bool #951

• converting json to vector of type with templated constructor #924

• No structured bindings support? #901

• Request

• basic_json::value throws exception instead of returning default value #871

• Fix constraints on from_json(CompatibleArrayType) #969 (theodelrieu)

• Make coveralls watch the include folder #957 (theodelrieu)

• Fix links in README.md #955 (patrikhuber)

• Add a note about installing the library with cget #954 (pfultz2)

v3.1.0 (2018-02-01)

Full Changelog

• Templatize std::string in binary_reader #941 #950 (kaidokert)
• fix cmake install directory for real this time #944 (theodelrieu)
• Allow overriding THROW/CATCH/TRY macros with no-exceptions #938 #940 (kaidokert)
• Removed compiler warning about unused variable 'kMinExp' #936 (zerodefect)
• Fix a typo in README.md #930 (Pipeliner)
• Howto installation of json_fwd.hpp fixes \#923 #925 (zerodefect)
• fix sfinae on basic_json UDT constructor #919 (theodelrieu)
• Floating-point formatting #915 (abolz)
• Fix/cmake install #911 (theodelrieu)
• fix link to the documentation of the emplace function #900 (Dobiasd)
• JSON Merge Patch RFC 7396 #876 (nlohmann)
• Refactor/split it #700 (theodelrieu)

3.1.0 (2018-02-01)

Full Changelog

• I have a proposal #949
• VERSION define(s) #948
• v3.0.1 compile error in icc 16.0.4 #947
• Use in VS2017 15.5.5 #946
• Process for reporting Security Bugs? #945
• Please expose a NLOHMANN_JSON_VERSION macro #943
• Change header include directory to nlohmann/json #942
• string_type in binary_reader #941
• compile error with clang 5.0 -std=c++1z and no string_view #939
• Allow overriding JSON_THROW to something else than abort() #938
• Handle invalid string in Json file #937
• Unused variable 'kMinExp' #935
• yytext is already defined #933
• Equality operator fails #931
• use in visual studio 2015 #929
• Relative includes of json_fwd.hpp in detail/meta.hpp. [Develop branch] #928
• GCC 7.x issue #926
• json_fwd.hpp not installed #923
• Use Google Benchmarks #921
• Move class json_pointer to separate file #920
• Unable to locate 'to_json()' and 'from_json()' methods in the same namespace #917

• answered

• Don't use define private public in test files #913
• value() template argument type deduction #912
• Installation path is incorrect #910
• H #909
• Build failure using clang 5 #908
• Amalgate #907
• Update documentation and tests wrt. split headers #906
• Lib not working on ubuntu 16.04 #905
• Problem when writing to file. #904
• C2864 error when compiling with VS2015 and VS 2017 #903

• json.exception.type\_error.304

• How do I forward nlohmann::json declaration? #899
• How to effectively store binary data? #898
• How to get the length of a JSON string without retrieving its std::string? #897
• Regression Tests Failure using "ctest" #887
• Discuss: add JSON Merge Patch RFC 7396? #877
• Discuss: replace static "iterator_wrapper" function with "items" member function #874
• Make optional user-data available in from_json #864
• Casting to std::string not working in VS2015 #861
• Sequential reading of JSON arrays #851
• Idea: Handle Multimaps Better #816
• Floating point rounding #777
• Loss of precision when serializing <double> #360

v3.0.1 (2017-12-29)

Full Changelog

• Includes CTest module/adds BUILD_TESTING option #885 (TinyTinni)
• Fix MSVC warning C4819 #882 (erengy)
• Merge branch 'develop' into coverity_scan #880 (nlohmann)
• 🔧 Fix up a few more effc++ items #858 (mattismyname)

3.0.1 (2017-12-29)

Full Changelog

• Problem parsing array to global vector #896
• Invalid RFC6902 copy operation succeeds #894
• How to rename a key during looping? #893
• clang++-6.0 6.0.0-svn321357-1 warning #892
• Make json.hpp aware of the modules TS? #891
• All enum values not handled in switch cases. -Wswitch-enum #889
• JSON Pointer resolve failure resulting in incorrect exception code #888
• Unexpected nested arrays from std::vector #886
• erase multiple elements from a json object #884
• Container function overview in Doxygen is not updated #883
• How to use this for binary file uploads #881
• Allow setting JSON_BuildTests=OFF from parent CMakeLists.txt #846
• Unit test fails for local-independent str-to-num #845
• Another idea about type support #774

v3.0.0 (2017-12-17)

Full Changelog

• ✅ re-added tests for algorithms #879 (nlohmann)
• Overworked library toward 3.0.0 release #875 (nlohmann)
• 🚨 remove C4996 warnings #872 #873 (nlohmann)
• 💥 throwing an exception in case dump encounters a non-UTF-8 string #838 #870 (nlohmann)
• 📝 fixing documentation #867 #868 (nlohmann)
• iter_impl template conformance with C++17 #860 (bogemic)
• Std allocator conformance cpp17 #856 (bogemic)
• cmake: use BUILD_INTERFACE/INSTALL_INTERFACE #855 (theodelrieu)
• to/from_json: add a MSVC-specific static_assert to force a stacktrace #854 (theodelrieu)
• Add .natvis for MSVC debug view #844 (TinyTinni)
• Updated hunter package links #829 (jowr)
• Typos README #811 (Itja)
• add forwarding references to json_ref constructor #807 (theodelrieu)
• Add transparent comparator and perfect forwarding support to find() and count() #795 (jseward)
• Error : 'identifier "size_t" is undefined' in linux #793 (sonulohani)
• Fix Visual Studio 2017 warnings #788 (jseward)
• Fix warning C4706 on Visual Studio 2017 #785 (jseward)
• Set GENERATE_TAGFILE in Doxyfile #783 (eld00d)
• using more CMake #765 (nlohmann)
• Simplified istream handing #367 #764 (pjkundert)
• Add info for the vcpkg package. #753 (gregmarr)
• fix from_json implementation for pair/tuple #708 (theodelrieu)
• Update json.hpp #686 (GoWebProd)
• Remove duplicate word #685 (daixtrose)
• To fix compilation issue for intel OSX compiler #682 (kbthomp1)
• Digraph warning #679 (traits)
• massage -> message #678 (DmitryKuk)
• Fix "not constraint" grammar in docs #674 (wincent)
• Add documentation for integration with CMake and hunter #671 (dan-42)
• REFACTOR: rewrite CMakeLists.txt for better inlcude and reuse #669 (dan-42)
• enable_testing only if the JSON_BuildTests is ON #666 (effolkronium)
• Support moving from rvalues in std::initializer_list #663 (himikof)
• add ensure_ascii parameter to dump. #330 #654 (ryanjmulder)
• Rename BuildTests to JSON_BuildTests #652 (olegendo)
• Don't include <iostream>, use std::make_shared #650 (olegendo)
• Refacto/split basic json #643 (theodelrieu)
• fix typo in operator__notequal example #630 (Chocobo1)
• Fix MSVC warning C4819 #629 (Chocobo1)

• BugFix

• add pair/tuple conversions #624 (theodelrieu)
• remove std::pair support #615 (theodelrieu)
• Add pair support, fix CompatibleObject conversions fixes \#600 #609 (theodelrieu)
• #550 Fix iterator related compiling issues for Intel icc #598 (HenryRLee)
• Issue #593 Fix the arithmetic operators in the iterator and reverse iterator #595 (HenryRLee)
• fix doxygen error of basic_json::get() #583 (zhaohuaxishi)
• Fixing assignement for iterator wrapper second, and adding unit test #579 (Type1J)
• Adding first and second properties to iteration_proxy_internal #578 (Type1J)
• Adding support for Meson. #576 (Type1J)
• add enum class default conversions #545 (theodelrieu)
• Properly pop diagnostics #540 (tinloaf)
• Add Visual Studio 17 image to appveyor build matrix #536 (vpetrigo)
• UTF8 encoding enhancement #534 (TedLyngmo)
• Fix typo #530 (berkus)
• Make exception base class visible in basic_json #526 (krzysztofwos)
• 🎨 Namespace uint8_t from the C++ stdlib #510 (alex-weej)
• add to_json method for C arrays #508 (theodelrieu)
• Fix -Weffc++ warnings GNU 6.3.1 #496 (TedLyngmo)

3.0.0 (2017-12-17)

Full Changelog

• unicode strings #878
• Visual Studio 2017 15.5 C++17 std::allocator deprecations #872
• Typo "excpetion" #869
• Explicit array example in README.md incorrect #867
• why don't you release this from Feb. ? #865
• json::parse throws std::invalid_argument when processing string generated by json::dump() #863
• code analysis: potential bug? #859
• MSVC2017, 15.5 new issues. #857
• very basic: fetching string value/content without quotes #853
• Ambiguous function call to get with pointer type and constant json object in VS2015 15.4.4 #852
• How to put object in the array as a member? #850
• misclick, please ignore #849
• Make XML great again. #847
• Converting to array not working #843
• Iteration weirdness #842
• Use reference or pointer as Object value #841
• Ambiguity in parsing nested maps #840
• could not find from_json() method in T's namespace #839
• Incorrect parse error with binary data in keys? #838
• using dump() when std::wstring is StringType with VS2017 #836
• Show the path of the currently parsed value when an error occurs #835
• Repetitive data type while reading #833
• Storing multiple types inside map #831
• Application terminating #830
• Missing CMake hunter package? #828
• std::map<std::string, std::string> from json object yields C2665: 'std::pair<const _Kty,_Ty>::pair': none of the 2 overloads could convert all the argument types #827
• object.dump gives quoted string, want to use .dump() to generate javascripts. #826
• Assertion failed on ["NoExistKey"] of an not existing key of const json& #825
• vs2015 error : static member will remain uninitialized at runtime but use in constant-expressions is supported #824
• Code Checking Warnings from json.hpp on VS2017 Community #821
• Missing iostream in try online #820
• Floating point value loses decimal point during dump #818
• Conan package for the library #817
• stream error #815
• Link error when using find() on the latest commit #814
• ABI issue with json object between 2 shared libraries #813
• scan_string() return token_type::parse_error; when parse ansi file #812
• segfault when using fifo_map with json #810
• This shit is shit #809
• _finite and _isnan are no members of "std" #808
• how to print out the line which causing exception? #806
• {} uses copy constructor, while = does not #805
• json.hpp:8955: multiple definition of function that is not defined twice or more. #804

• question

• Misleading error message - unexpected '"' - on incorrect utf-8 symbol #802
• json data = std::string_view("hi"); doesn't work? #801
• Thread safety of parse() #800
• Numbers as strings #799
• Tests failing on arm #797
• Using your library without modification in another library #796
• Iterating over sub-object #794
• how to get the json object again from which printed by the method of dump() #792
• ppa to include source #791
• Different include paths in macOS and Ubuntu #790
• Missing break after line 12886 in switch/case #789
• All unit tests fail? #787
• More use of move semantics in deserialization #786
• warning C4706 - Visual Studio 2017 /W4 #784
• Compile error in clang 5.0 #782
• Error Installing appium_lib with Ruby v2.4.2 Due to JSON #781
• ::get<int> fails in new(er) release [MSVC] #780
• Type Conversion #779
• Segfault on nested parsing #778
• Build warnings: shadowing exception id #776
• multi-level JSON support. #775
• SIGABRT on dump() #773

• Question

• constexpr ALL the Things! #771
• error: ‘BasicJsonType’ in namespace ‘::’ does not name a type #770
• Program calls abort function #769

• Question

• make check - no test ran #767
• The library cannot work properly with custom allocator based containers #766
• Documentation or feature request. #763
• warnings in msvc about mix/max macro while windows.h is used in the project #762
• std::signbit ambiguous #761
• How to use value for std::experimental::optional type? #760
• Cannot load json file properly #759
• Compilation error with unordered_map< int, int > #758
• CBOR string #757
• Proposal: out_of_range should be a subclass of std::out_of_range #756
• Compiling with icpc #755
• Getter is setting the value to null if the key does not exist #754
• parsing works sometimes and crashes others #752
• Static_assert failed "incompatible pointer type" with Xcode #751
• user-defined literal operator not found #750
• getting clean string from it.key() #748
• Best method for exploring and obtaining values of nested json objects when the names are not known beforehand? #747
• null char at the end of string #746
• Incorrect sample for operator >> in docs #745
• User-friendly documentation #744
• Retrieve all values that match a json path #743
• Compilation issue with gcc 7.2 #742
• CMake target nlohmann_json does not have src into its interface includes #741
• Error when serializing empty json: type must be string, but is object #740
• Conversion error for std::map<int, std::string> #739
• Dumping Json to file as array #738
• nesting json objects #737
• where to find general help? #736
• Compilation Error on Clang 5.0 Upgrade #735
• Compilation error with std::map<std::string, std::string> on vs 2015 #734
• Benchmarks for Binary formats #733
• Support \n symbols in json string. #731
• Project's name is too generic and hard to search for #730
• Visual Studio 2015 IntelliTrace problems #729
• How to erase nested objects inside other objects? #728
• Serialization for CBOR #726
• Using json Object as value in a map #725
• std::regex and nlohmann::json value #724
• Warnings when compiling with VisualStudio 2015 #723
• Has this lib the unicode wstring support? #722
• When will be 3.0 in master? #721
• Determine the type from error message. #720
• Compile-Error C2100 MS VS2015 in line 887 json.hpp #719
• from_json not working for boost::optional example #718
• about from_json and to_json function #717
• How to detect parse failure? #715
• Parse throw std::ios_base::failure exception when failbit set to true #714
• Is there a way of format just making a pretty print without changing the key's orders ? #713
• Serialization of array of not same model items #712
• pointer to json parse vector #711
• Gtest SEH Exception #709
• broken from_json implementation for pair and tuple #707
• Unevaluated lambda in assert breaks gcc 7 build #705
• Issues when adding values to firebase database #704
• Floating point equality - revisited #703
• Conversion from valarray<double> to json fails to build #702
• internal compiler error gcc7 #701
• One build system to rule them all #698
• Generated nlohmann_jsonConfig.cmake does not set JSON_INCLUDE_DIR #695
• support the Chinese language in json string #694
• NaN problem within develop branch #693
• Please post example of specialization for boost::filesystem #692
• Impossible to do an array of composite objects #691
• How to save json to file? #690
• my simple json parser #689
• problem with new struct parsing syntax #688
• Parse error while parse the json string contains UTF 8 encoded document bytes string #684

• question

• create json object from string variable #681
• adl_serializer and CRTP #680
• Is there a way to control the precision of serialized floating point numbers? #677
• Is there a way to get the path of a value? #676
• Could the parser locate errors to line? #675
• There is performance inefficiency found by coverity tool json2.1.1/include/nlohmann/json.hpp #673
• include problem, when cmake on osx #672
• Operator= ambiguous in C++1z and GCC 7.1.1 #670
• should't the cmake install target be to nlohman/json.hpp #668
• deserialise from std::vector #667
• How to iterate? #665
• could this json lib work on windows? #664
• How does from_json work? #662
• insert(or merge) object should replace same key , not ignore #661
• Parse method doesn't handle newlines. #659
• Compilation "note" on GCC 6 ARM #658
• Adding additional push_back/operator+= rvalue overloads for JSON object #657
• dump's parameter "ensure_ascii" creates too long sequences #656
• Question: parsing void * #655
• how should I check a string is valid JSON string ? #653
• Question: thread safety of read only accesses #651
• Eclipse: Method 'size' could not be resolved #649
• Update/Add object fields #648
• No exception raised for Out Of Range input of numbers #647
• Package Name #646
• What is the meaning of operator[]T\* key #645
• Which is the correct way to json objects as parameters to functions? #644
• Method to get string representations of values #642
• CBOR serialization of a given JSON value does not serialize #641
• Are we forced to use "-fexceptions" flag in android ndk project #640
• Comparison of objects containing floats #639
• 'localeconv' is not supported by NDK for SDK <=20 #638

• Question

• How to construct an iteratable usage in nlohmann json? #636

• Question

• Get size without .dump() #634
• Segmentation fault when parsing invalid json file #633
• How to serialize from json to vector<customType>? #632
• no member named 'thousands_sep' in 'lconv' #631

• Question

• Dependency injection in serializer #627
• from_json for std::array #625
• Discussion: How to structure the parsing function families #623
• Question: How to erase subtree #622
• Insertion into nested json field #621
• Question: return static json object from function #618
• icc16 error #617

• -Wdeprecated-declarations

• to_json for pairs, tuples #614
• Using uninitialized memory 'buf' in line 11173 v2.1.1? #613
• How to parse multiple same Keys of JSON and save them? #612
• "Multiple declarations" error when using types defined with typedef #611
• 2.1.1+ breaks compilation of shared_ptr<json> == 0 #610
• a bug of inheritance ? #608
• std::map key conversion with to_json #607
• json.hpp:6384:62: error: wrong number of template arguments 1, should be 2 #606
• Incremental parsing: Where's the push version? #605
• Is there a way to validate the structure of a json object ? #604

• Question

• BOM not skipped when using json:parse(iterator) #602
• Use of the binary type in CBOR and Message Pack #601
• Newbie issue: how does one convert a map in Json back to std::map? #600
• Plugin system #599
• Using custom types for scalars? #596
• Issues with the arithmetic in iterator and reverse iterator #593
• not enough examples #592
• in-class initialization for type 'const T' is not yet implemented #591
• compiling with gcc 7 -> error on bool operator < #590
• Parsing from stream leads to an array #589
• Buggy support for binary string data #587
• C++17's ambiguous conversion #586
• How does the messagepack encoding/decoding compare to msgpack-cpp in terms of performance? #585
• is it possible to check existence of a value deep in hierarchy? #584
• loading from a stream and exceptions #582
• Visual Studio seems not to have all min() function versions #581
• Supporting of the json schema #580
• Stack-overflow OSS-Fuzz 1444 #577
• Heap-buffer-overflow OSS-Fuzz 1400 #575
• JSON escape quotes #574
• error: static_assert failed #573
• Storing floats, and round trip serialisation/deserialisation diffs #572
• JSON.getLong produces inconsistent results #571
• Request: Object.at() with default return value #570
• Internal structure gets corrupted while parsing #569
• create template <typename Iter> basic_json from_cbor(Iter begin, Iter end) #568
• Conan.io #566
• contradictory documentation regarding json::find #565
• Unexpected '"' in middle of array #564
• Support parse std::pair to Json object #563
• json and Microsoft Visual c++ Compiler Nov 2012 CTP #562
• from_json declaration order and exceptions #561
• Tip: Don't upgrade to VS2017 if using json initializer list constructs #559
• parse error - unexpected end of input #558
• Cant modify existing numbers inside a json object #557
• Better support for SAX style serialize and deserialize in new version? #554
• Cannot convert from json array to std::array #553
• Do not define an unnamed namespace in a header file DCL59-CPP #552
• Parse error on known good json file #551
• Warning on Intel compiler icc 17 #550
• multiple versions of 'vsnprintf' #549
• illegal indirection #548
• Ambiguous compare operators with clang-5.0 #547
• Using tsl::ordered_map #546
• Compiler support errors are inconvenient #544
• Duplicate symbols error happens while to_json/from_json method implemented inside entity definition header file #542
• consider adding a bool json::is_valid(std::string const&) non-member function #541
• Help request #539
• How to deal with missing keys in from_json? #538
• recursive from_msgpack implementation will stack overflow #537
• Exception objects must be nothrow copy constructible ERR60-CPP #531
• Support for multiple root elements #529
• Port has_shape from dropbox/json11 #528
• dump_float: truncation from ptrdiff_t to long #527
• Make exception base class visible in basic_json #525
• msgpack unit test failures on ppc64 arch #524
• How about split the implementation out, and only leave the interface? #523
• VC++2017 not enough actual parameters for macro 'max' #522
• crash on empty ifstream #521
• Suggestion: Support tabs for indentation when serializing to stream. #520
• Abrt in get_number OSS-Fuzz 885 #519
• Abrt on unknown address OSS-Fuzz 884 #518
• Stack-overflow OSS-Fuzz 869 #517
• Assertion error OSS-Fuzz 868 #516
• NaN to json and back #515
• Comparison of NaN #514
• why it's not possible to serialize c++11 enums directly #513
• clang compile error: use of overloaded operator '<=' is ambiguous with (nlohmann::json{{"a", 5}})["a"] <= 10 #512
• Why not also look inside the type for static to_json and from_json funtions? #511
• Parser issues #509
• I may not understand #507
• VS2017 min / max problem for 2.1.1 #506
• CBOR/MessagePack is not read until the end #505
• Assertion error OSS-Fuzz 856 #504
• Return position in parse error exceptions #503
• conversion from/to C array is not supported #502
• error C2338: could not find to_json() method in T's namespace #501
• Test suite fails in en_GB.UTF-8 #500
• cannot use operator[] with number #499
• consider using __cpp_exceptions and/or __EXCEPTIONS to disable/enable exception support #498
• Stack-overflow OSS-Fuzz issue 814 #497
• Using in Unreal Engine - handling custom types conversion #495
• Conversion from vector<bool> to json fails to build #494
• fill_line_buffer incorrectly tests m_stream for eof but not fail or bad bits #493
• Compiling with _GLIBCXX_DEBUG yields iterator-comparison warnings during tests #492
• crapy interface #491
• Fix Visual Studo 2013 builds. #490
• Failed to compile with -D_GLIBCXX_PARALLEL #489
• Input several field with the same name #488
• read in .json file yields strange sizes #487
• json::value_t can't be a map's key type in VC++ 2015 #486
• Using fifo_map #485
• Cannot get float pointer for value stored as 0 #484
• byte string support #483
• https://github.com/nlohmann/json#execute-unit-tests #481
• Remove deprecated constructor basic_json(std::istream&) #480
• writing the binary json file? #479
• CBOR/MessagePack from uint8_t * and size #478
• Streaming binary representations #477
• Reuse memory in to_cbor and to_msgpack functions #476
• Error Using JSON Library with arrays C++ #475
• Moving forward to version 3.0.0 #474
• Inconsistent behavior in conversion to array type #473
• Create a [key:member_pointer] map to ease parsing custom types #471
• MSVC 2015 update 2 #469
• VS2017 implicit to std::string conversion fix. #464
• How to make sure a string or string literal is a valid JSON? #458
• basic_json templated on a "policy" class #456
• json::value(const json_pointer&, ValueType) requires exceptions to return the default value. #440
• is it possible merge two json object #428
• Is it possible to turn this into a shared library? #420
• Further thoughts on performance improvements #418
• nan number stored as null #388
• Behavior of operator>> should more closely resemble that of built-in overloads. #367
• Request: range-based-for over a json-object to expose .first/.second #350
• feature wish: JSONPath #343
• UTF-8/Unicode escape and dump #330
• Serialized value not always can be parsed. #329
• Is there a way to forward declare nlohmann::json? #314
• Exception line #301
• Do not throw exception when default_value's type does not match the actual type #278
• dump() method doesn't work with a custom allocator #268
• Readme documentation enhancements #248
• Use user-defined exceptions #244
• Incorrect C++11 allocator model support #161

v2.1.1 (2017-02-25)

Full Changelog

• Speedup CI builds using cotire #461 (tusharpm)
• TurpentineDistillery feature/locale independent str to num #450 (nlohmann)
• README: adjust boost::optional example #439 (jaredgrubb)
• fix #414 - comparing to 0 literal #415 (stanmihai4)
• locale-independent num-to-str #378 (TurpentineDistillery)

2.1.1 (2017-02-25)

Full Changelog

• warning in the library #472
• How to create an array of Objects? #470

• Bug?

• Illegal indirection #467
• in vs can't find linkageId #466
• Roundtrip error while parsing "1000000000000000010E5" #465
• C4996 error and warning with Visual Studio #463
• Support startIndex for from_cbor/from_msgpack #462
• question: monospace font used in feature slideshow? #460
• Object.keys() #459
• Use “, “ as delimiter for json-objects. #457
• Enum -> string during serialization and vice versa #455
• doubles are printed as integers #454
• Warnings with Visual Studio c++ VS2015 Update 3 #453
• Heap-buffer-overflow OSS-Fuzz issue 585 #452
• use of undeclared identifier 'UINT8_MAX' #451
• Question on the lifetime managment of objects at the lower levels #449
• Json should not be constructible with 'json*' #448
• Move value_t to namespace scope #447
• Typo in README.md #446
• make check compilation is unneccesarily slow #445
• Problem in dump() in json.h caused by ss.imbue #444
• I want to create Windows Application in Visual Studio 2015 c++, and i have a problem #443
• Implicit conversion issues #442
• Parsing of floats locale dependent #302

v2.1.0 (2017-01-28)

Full Changelog

• conversion from/to user-defined types #435 (nlohmann)
• Fix documentation error #430 (vjon)

2.1.0 (2017-01-28)

Full Changelog

• Parsing multiple JSON objects from a string or stream #438
• Use-of-uninitialized-value OSS-Fuzz issue 477 #437
• add reserve function for array to reserve memory before adding json values into it #436
• Typo in examples page #434
• avoid malformed json #433
• How to add json objects to a map? #432
• create json instance from raw json unsigned char\* #431
• Getting std::invalid_argument: stream error when following example #429
• Forward declare-only header? #427
• Implicit conversion from array to object #425
• error C4996: 'strerror' when reading file #422
• Get an error - JSON pointer must be empty or begin with '/' #421
• size parameter for parse() #419
• json.hpp forcibly defines GCC_VERSION #417
• Use-of-uninitialized-value OSS-Fuzz issue 377 #416
• comparing to 0 literal #414
• Single char converted to ASCII code instead of string #413
• How to know if a string was parsed as utf-8? #406
• Overloaded += to add objects to an array makes no sense? #404
• Finding a value in an array #399
• add release information in static function #397
• Optimize memory usage of json objects in combination with binary serialization #373
• Conversion operators not considered #369
• Append ".0" to serialized floating_point values that are digits-only. #362
• Add a customization point for user-defined types #328
• Conformance report for reference #307
• Document the best way to serialize/deserialize user defined types to json #298
• Add StringView template typename to basic_json #297

• Improvement

• Performance in miloyip/nativejson-benchmark #202

v2.0.10 (2017-01-02)

Full Changelog

• Feature/clang sanitize #410 (Daniel599)
• Add Doozer build badge #400 (andoma)

2.0.10 (2017-01-02)

Full Changelog

• Heap-buffer-overflow OSS-Fuzz issue 367 #412
• Heap-buffer-overflow OSS-Fuzz issue 366 #411
• Use-of-uninitialized-value OSS-Fuzz issue 347 #409
• Heap-buffer-overflow OSS-Fuzz issue 344 #408
• Heap-buffer-overflow OSS-Fuzz issue 343 #407
• Heap-buffer-overflow OSS-Fuzz issue 342 #405
• strerror throwing error in compiler VS2015 #403
• json::parse of std::string being underlined by Visual Studio #402
• Explicitly getting string without .dump() #401
• Possible to speed up json::parse? #398
• the alphabetic order in the code influence console_output. #396
• Execute tests with clang sanitizers #394
• Check if library can be used with ETL #361

v2.0.9 (2016-12-16)

Full Changelog

• Replace class iterator and const_iterator by using a single template class to reduce code. #395 (Bosswestfalen)
• Clang: quiet a warning #391 (jaredgrubb)
• Fix issue #380: Signed integer overflow check #390 (qwename)

2.0.9 (2016-12-16)

Full Changelog

• #pragma GCC diagnostic ignored "-Wdocumentation" #393
• How to parse this json file and write separate sub object as json files? #392
• Integer-overflow OSS-Fuzz issue 267 #389
• Implement indefinite-length types from RFC 7049 #387
• template parameter "T" is not used in declaring the parameter types of function template #386
• Serializing json instances containing already serialized string values without escaping #385
• Add test cases from RFC 7049 #384
• Add a table of contents to the README file #383
• Update FAQ section in the guidelines for contributing #382
• Allow for forward declaring nlohmann::json #381
• Bug in overflow detection when parsing integers #380
• A unique name to mention the library? #377
• Non-unique keys in objects. #375
• Request: binary serialization/deserialization #358

v2.0.8 (2016-12-02)

Full Changelog

2.0.8 (2016-12-02)

Full Changelog

• Reading from file #374
• Compiler warnings? #372
• docs: how to release a json object in memory? #371
• crash in dump #370
• Coverity issue FORWARD\_NULL in lexer(std::istream& s) #368
• json::parse on failed stream gets stuck #366
• Performance improvements #365
• 'to_string' is not a member of 'std' #364
• Crash in dump() from a static object #359
• json::parse(...) vs json j; j.parse(...) #357
• Hi, is there any method to dump json to string with the insert order rather than alphabets #356
• Provide an example of reading from an json with only a key that has an array of strings. #354
• Request: access with default value. #353
• {} and [] causes parser error. #352
• Reading a JSON file into a JSON object #351
• Request: 'emplace_back' #349
• Is it possible to stream data through the json parser without storing everything in memory? #347
• pure virtual conversion operator #346
• Floating point precision lost #345
• unit-conversions SIGSEGV on armv7hl #303
• Coverity scan fails #299
• Using QString as string type #274

v2.0.7 (2016-11-02)

Full Changelog

• JSON5 #348

• Check "Parsing JSON is a Minefield" #344

• Allow hex numbers #342

• Convert strings to numbers #341

• ""-operators ignore the length parameter #340

• JSON into std::tuple #339

• JSON into vector #335

• Installing with Homebrew on Mac Errors El Capitan #331

• g++ make check results in error #312

• Cannot convert from 'json' to 'char' #276

• Please add a Pretty-Print option for arrays to stay always in one line #229

• Conversion to STL map<string, vector<int>> gives error #220

• std::unorderd_map cannot be used as ObjectType #164

• fix minor grammar/style issue in README.md #336 (seeekr)

v2.0.6 (2016-10-15)

Full Changelog

• How to handle json files? #333

• This file requires compiler and library support .... #332

• Segmentation fault on saving json to file #326

• parse error - unexpected <uninitialized> with 2.0.5 #325

• Add nested object capability to pointers #323

• Fix usage examples' comments for std::multiset #322

• json_unit runs forever when executed in build directory #319

• Visual studio 2015 update3 true != TRUE #317

• releasing single header file in compressed format #316

• json object from std::ifstream #315

• make has_mapped_type struct friendly #324 (vpetrigo)

• Fix usage examples' comments for std::multiset #321 (vasild)

• Include dir relocation #318 (ChristophJud)

• trivial documentation fix #313 (5tefan)

v2.0.5 (2016-09-14)

Full Changelog

• feature request

• make json_benchmarks no longer working in 2.0.4 #310
• Segmentation fault core dumped #309
• No matching member function for call to 'get_impl' #308

v2.0.4 (2016-09-11)

Full Changelog

• Parsing fails without space at end of file #306
• json schema validator #305
• Unused variable warning #304

v2.0.3 (2016-08-31)

Full Changelog

• warning C4706: assignment within conditional expression #295

• Q: Is it possible to build json tree from already UTF8 encoded values? #293

• Equality operator results in array when assigned object #292

• Support for integers not from the range [-(2**53)+1, (2**53)-1] in parser #291

• Support for iterator-range parsing #290

• Horribly inconsistent behavior between const/non-const reference in operator [] #289

• Silently get numbers into smaller types #288

• Incorrect parsing of large int64_t numbers #287

• question

• unit-constructor1.cpp: Fix floating point truncation warning #300 (t-b)

v2.0.2 (2016-07-31)

Full Changelog

• can function dump() return string in the order I push in the json object ? #286

• Error on the Mac: Undefined symbols for architecture x86_64 #285

• value() does not work with _json_pointer types #283

• Build error for std::int64 #282

• strings can't be accessed after dump()->parse() - type is lost #281

• Easy serialization of classes #280

• recursive data structures #277

• hexify() function emits conversion warning #270

• let the makefile choose the correct sed #279 (murinicanor)

• Update hexify to use array lookup instead of ternary \#270 #275 (dtoma)

v2.0.1 (2016-06-28)

Full Changelog

• Compilation error. #273

• dump() performance degradation in v2 #272

• fixed a tiny typo #271 (feroldi)

v2.0.0 (2016-06-23)

Full Changelog

• json::diff generates incorrect patch when removing multiple array elements. #269

• Docs - What does Json[key] return? #267

• Compiler Errors With JSON.hpp #265

• Ambiguous push_back and operator+= overloads #263

• Preseving order of items in json #262

• '' char problem in strings #261

• VS2015 compile fail #260

• -Wconversion warning #259

• Maybe a bug #258

• Few tests failed on Visual C++ 2015 #257

• Access keys when iteration with new for loop C++11 #256

• multiline text values #255

• Error when using json in g++ #254

• is the release 2.0? #253

• concatenate objects #252

• Encoding #251

• Unable to build example for constructing json object with stringstreams #250

• Hexadecimal support #249

• Update long-term goals #246

• Contribution To This Json Project #245

• Trouble using parser with initial dictionary #243

• Unit test fails when doing a CMake out-of-tree build #241

• -Wconversion warnings #239

• Additional integration options #237

• .get<std::string> works for non spaced string but returns as array for spaced/longer strings #236

• ambiguous overload for 'push_back' and 'operator+=' #235

• Can't use basic_json::iterator as a base iterator for std::move_iterator #233

• json object's creation can freezes execution #231

• Incorrect dumping of parsed numbers with exponents, but without decimal places #230

• double values are serialized with commas as decimal points #228

• Move semantics with std::initializer_list #225

• replace emplace #224

• abort during getline in yyfill #223

• free(): invalid pointer error in GCC 5.2.1 #221

• Error compile Android NDK error: 'strtof' is not a member of 'std' #219

• Wrong link in the README.md #217

• Wide character strings not supported #216

• Memory allocations using range-based for loops #214

• would you like to support gcc 4.8.1? #211

• Reading concatenated json's from an istream #210

• Conflicting typedef of ssize_t on Windows 32 bit when using Boost.Python #204

• Inconsistency between operator[] and push_back #203

• Small bugs in json.hpp get\_number and unit.cpp non-standard integer type test #199

• GCC/clang floating point parsing bug in strtod() #195

• What is within scope? #192

• Bugs in miloyip/nativejson-benchmark: roundtrips #187

• Floating point exceptions #181

• Integer conversion to unsigned #178

• map string string fails to compile #176

• In basic_json::basic_json(const CompatibleArrayType& val), the requirement of CompatibleArrayType is not strict enough. #174

• Provide a FAQ #163

• Implicit assignment to std::string fails #144

• Fix Issue #265 #266 (06needhamt)

• Define CMake/CTest tests #247 (robertmrk)

• Out of tree builds and a few other miscellaneous CMake cleanups. #242 (ChrisKitching)

• Implement additional integration options #238 (robertmrk)

• make serialization locale-independent #232 (nlohmann)

• fixes #223 by updating README.md #227 (kevin--)

• Use namespace std for int64_t and uint64_t #226 (lv-zheng)

• Added missing cerrno header to fix ERANGE compile error on android #222 (Teemperor)

• Corrected readme #218 (Annihil)

• Create PULL_REQUEST_TEMPLATE.md #213 (whackashoe)

• fixed noexcept; added constexpr #208 (nlohmann)

• Add support for afl-fuzz testing #207 (mykter)

• replaced ssize_t occurrences with auto addresses \#204 #205 (nlohmann)

• Fixed issue #199 - Small bugs in json.hpp get\_number and unit.cpp non-standard integer type test #200 (twelsby)

• Fix broken link #197 (vog)

• Issue #195 - update Travis to Trusty due to gcc/clang strtod() bug #196 (twelsby)

• Issue #178 - Extending support to full uint64_t/int64_t range and unsigned type updated #193 (twelsby)

v1.1.0 (2016-01-24)

Full Changelog

• Small error in pull #185 #194

• Bugs in miloyip/nativejson-benchmark: floating-point parsing #186

• Floating point equality #185

• Unused variables in catch #180

• Typo in documentation #179

• JSON performance benchmark comparision #177

• Since re2c is often ignored in pull requests, it may make sense to make a contributing.md file #175

• Question about exceptions #173

• Android? #172

• Cannot index by key of type static constexpr const char* #171

• Add assertions #168

• MSVC 2015 build fails when attempting to compare object_t #167

• Member detector is not portable #166

• Unnecessary const_cast #162

• Question about get_ref() #128

• range based for loop for objects #83

• Consider submitting this to the Boost Library Incubator #66

• Fixed Issue #186 - add strto(f|d|ld) overload wrappers, "-0.0" special case and FP trailing zero #191 (twelsby)

• Issue #185 - remove approx() and use #pragma to kill warnings #190 (twelsby)

• Fixed Issue #171 - added two extra template overloads of operator[] for T* arguments #189 (twelsby)

• Fixed issue #167 - removed operator ValueType() condition for VS2015 #188 (twelsby)

• Implementation of get_ref() #184 (dariomt)

• Fixed some typos in CONTRIBUTING.md #182 (nibroc)

v1.0.0 (2015-12-27)

Full Changelog

• add key name to exception #160

• Getting member discarding qualifyer #159

• basic_json::iterator::value() output includes quotes while basic_json::iterator::key() doesn't #158

• Indexing const basic_json<> with const basic_string<char> #157

• token_type_name(token_type t): not all control paths return a value #156

• prevent json.hpp from emitting compiler warnings #154

• json::parse(string) does not check utf8 bom #152

• unsigned 64bit values output as signed #151

• Wish feature: json5 #150

• Unable to compile on MSVC 2015 with SDL checking enabled: This function or variable may be unsafe. #149

• "Json Object" type does not keep object order #148

• dump() convert strings encoded by utf-8 to shift-jis on windows 10. #147

• Unable to get field names in a json object #145

• Question: Is the use of incomplete type correct? #138

• json.hpp:5746:32: error: 'to_string' is not a member of 'std' #136

• Bug in basic_json::operator[] const overload #135

• wrong enable_if for const pointer instead of pointer-to-const #134

• overload of at() with default value #133

• Splitting source #132

• Question about get_ptr() #127

• Visual Studio 14 Debug assertion failed #125

• Memory leak in face of exceptions #118

• Find and Count for arrays #117

• dynamically constructing an arbitrarily nested object #114

• Returning any data type #113

• Compile error with g++ 4.9.3 cygwin 64-bit #112

• insert json array issue with gcc4.8.2 #110

• error: unterminated raw string #109

• vector<json> copy constructor really weird #108

• clang-3.6.2

• object field accessors #103

• v8pp and json #95

• Wishlist #65

• Windows/Visual Studio through 2013 is unsupported #62

• Replace sprintf with hex function, this fixes #149 #153 (whackashoe)

• Fix character skipping after a surrogate pair #146 (robertmrk)

• Detect correctly pointer-to-const #137 (dariomt)

• disabled "CopyAssignable" test for MSVC in Debug mode, see #125 #131 (dariomt)

• removed stream operator for iterator, resolution for #125 #130 (dariomt)

• fixed typos in comments for examples #129 (dariomt)

• Remove superfluous inefficiency #126 (d-frey)

• remove invalid parameter '-stdlib=libc++' in CMakeLists.txt #124 (emvivre)

• exception-safe object creation, fixes #118 #122 (d-frey)

• Fix small oversight. #121 (ColinH)

• Overload parse() to accept an rvalue reference #120 (silverweed)

• Use the right variable name in doc string #115 (whoshuu)

v1.0.0-rc1 (2015-07-26)

Full Changelog

• Finish documenting the public interface in Doxygen #102

• Binary string causes numbers to be dumped as hex #101

• failed to iterator json object with reverse_iterator #100

• 'noexcept' : unknown override specifier #99

• json float parsing problem #98

• Adjust wording to JSON RFC #97

• static analysis warnings #94

• reverse_iterator operator inheritance problem #93

• init error #92

• access by const reference #91

• is_integer and is_float tests #90

• Nonstandard integer type #89

• static library build #84

• lexer::get_number return NAN #82

• MinGW have no std::to_string #80

• Incorrect behaviour of basic_json::count method #78

• Invoking is_array() function creates "null" value #77

• dump() / parse() not idempotent #76

• Handle infinity and NaN cases #70

• errors in g++-4.8.1 #68

• Keys when iterating over objects #67

• Compilation results in tons of warnings #64

• Complete brief documentation #61

• Double quotation mark is not parsed correctly #60

• Get coverage back to 100% #58

• erase elements using iterators #57

• Removing item from array #56

• Serialize/Deserialize like PHP? #55

• Numbers as keys #54

• Why are elements alphabetized on key while iterating? #53

• Document erase, count, and iterators key and value #52

• Do not use std::to_string #51

• Supported compilers #50

• Confused about iterating through json objects #49

• Use non-member begin/end #48

• Erase key #47

• Key iterator #46

• Add count member function #45

• Problem getting vector array of strings #44

• Compilation error due to assuming that private=public #43

• Use of deprecated implicit copy constructor #42

• Printing attribute names #39

• dumping a small number_float just outputs 0.000000 #37

• find is error #32

• Avoid using spaces when encoding without pretty print #31

• Cannot encode long numbers #30

• segmentation fault when iterating over empty arrays/objects #28

• Creating an empty array #27

• Custom allocator support #25

• make the type of the used string container customizable #20

• Improper parsing of JSON string "\" #17

• create a header-only version #16

• Don't return "const values" #15

• Add to_string overload for indentation #13

• string parser does not recognize uncompliant strings #12

• possible double-free in find function #11

• UTF-8 encoding/deconding/testing #10

• move code into namespace #9

• free functions for explicit objects and arrays in initializer lists #8

• unique_ptr for ownership #7

• Add unit tests #4

• Drop C++98 support #3

• Test case coverage #2

• Runtime error in Travis job #1

• Keyword 'inline' is useless when member functions are defined in headers #87 (ahamez)

• Remove useless typename #86 (ahamez)

• Avoid warning with Xcode's clang #85 (ahamez)

• Fix typos #73 (aqnouch)

• Replace default_callback function with nullptr and check for null… #72 (aburgh)

• support enum #71 (likebeta)

• Fix performance regression introduced with the parsing callback feature. #69 (aburgh)

• Improve the implementations of the comparission-operators #63 (Florianjw)

• Fix compilation of json_unit with GCC 5 #59 (dkopecek)

• Parse streams incrementally. #40 (aburgh)

• Feature/small float serialization #38 (jrandall)

• template version with re2c scanner #36 (nlohmann)

• more descriptive documentation in example #33 (luxe)

• Fix string conversion under Clang #26 (wancw)

• Fixed dumping of strings #24 (Teemperor)

• Added a remark to the readme that coverage is GCC only for now #23 (Teemperor)

• Unicode escaping #22 (Teemperor)

• Implemented the JSON spec for string parsing for everything but the \uXXXX escaping #21 (Teemperor)

• add the std iterator typedefs to iterator and const_iterator #19 (kirkshoop)

• Fixed escaped quotes #18 (Teemperor)

• Fix double delete on std::bad_alloc exception #14 (elliotgoodrich)

• Added CMake and lcov #6 (Teemperor)

• Version 2.0 #5 (nlohmann)

* This Changelog was automatically generated by github_changelog_generator