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json v3.9.1 Release Notes

• 🚀 Release date: 2020-08-06
  SHA-256: 7804b38146921d03374549c9e2a5e3acda097814c43caf2b96a0278e58df26e0 (json.hpp), 6bea5877b1541d353bd77bdfbdb2696333ae5ed8f9e8cc22df657192218cad91 (include.zip)

  Summary

  This release fixes two bugs in the features introduced in release 3.9.0. The lexer did not accept consecutive comments , and ordered_json lacked some functions from json. All changes are backward-compatible.

  👌 💰 Note you can support this project via GitHub sponsors or PayPal.

  🍱 🐛 Bug Fixes

  • The lexer did not accept input with two or more consecutive comments (e.g. /* one */ /* two */ []). #2330 #2332
  • The newly introduced ordered_json container did not implement the complete interface of basic_json which broke existing code when json was replaced by ordered_json, in particular when trying to call ordered_json::parse. #2315 #2319 #2331

  🍱 🔨 Further Changes

  • Install pkg-config file to CMAKE_CURRENT_BINARY_DIR instead of CMAKE_BINARY_DIR #2318
  • Make installation directory of pkg-config file depend on CMAKE_INSTALL_LIBDIR. #2314
  • 🛠 Fix -Wimplicit-fallthrough warning. #2333
  • 🛠 Fix name of Homebrew formula in documentation. #2326 #2327
  • 🛠 Fix typo in documentation. #2320

  🍱 🔥 Deprecated functions

  🚚 The following functions have been deprecated in earlier versions and will be removed in the next major version (i.e., 4.0.0):

  • Function iterator_wrapper are deprecated. Please use the member function items() instead.
  • Functions friend std::istream& operator<<(basic_json&, std::istream&) and friend std::ostream& operator>>(const basic_json&, std::ostream&) are deprecated. Please use friend std::istream& operator>>(std::istream&, basic_json&) and friend operator<<(std::ostream&, const basic_json&) instead.
  • 📜 Passing iterator pairs or pointer/length pairs to parsing functions (basic_json::parse, basic_json::accept, basic_json::sax_parse, basic_json::from_cbor, basic_json::from_msgpack, basic_json::from_ubjson, basic_json::from_bson) via initializer lists is deprecated. Instead, pass the elements individually without braces.

  🗄 All deprecations are annotated with HEDLEY_DEPRECATED_FOR to report which function to use instead.

Previous changes from v3.9.0

• 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
  • 0️⃣ 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] Allow std::optional to convert to nlohmann::json #1749
  • 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)

  • ➕ 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)

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