- Simple ordered\_json that works on all supported compilers [\#2206](https://github.com/nlohmann/json/pull/2206) ([gatopeich](https://github.com/gatopeich))
- Use unsigned indizies for array index in json pointer [\#2203](https://github.com/nlohmann/json/pull/2203) ([t-b](https://github.com/t-b))
- Use unsigned indices for array index in json pointer [\#2203](https://github.com/nlohmann/json/pull/2203) ([t-b](https://github.com/t-b))
- Add option to not rely on Internet connectivity during test stage [\#2202](https://github.com/nlohmann/json/pull/2202) ([nlohmann](https://github.com/nlohmann))
- Serialize floating-point numbers with 32 bit when possible \(MessagePack\) [\#2201](https://github.com/nlohmann/json/pull/2201) ([nlohmann](https://github.com/nlohmann))
- Fix consistency in function `int_to_string()` [\#2193](https://github.com/nlohmann/json/pull/2193) ([dota17](https://github.com/dota17))
@ -502,7 +502,7 @@ All notable changes to this project will be documented in this file. This projec
- json::parse\(\) fails to parse a dump\(2,' '\) output, yet does successfully parse dump\(\) [\#2105](https://github.com/nlohmann/json/issues/2105)
- run test-udt error in MSVC 19.16.27034.0 [\#2103](https://github.com/nlohmann/json/issues/2103)
- Unable to dump to stringstream [\#2102](https://github.com/nlohmann/json/issues/2102)
- Can't ad an object in another objet [\#2101](https://github.com/nlohmann/json/issues/2101)
- Can't add an object in another object [\#2101](https://github.com/nlohmann/json/issues/2101)
- Implicit conversion causes "cannot use operator\[\] with a string argument with string" [\#2098](https://github.com/nlohmann/json/issues/2098)
@ -845,7 +845,7 @@ All notable changes to this project will be documented in this file. This projec
- ciso646 header become obsolete [\#1782](https://github.com/nlohmann/json/issues/1782)
- Migrate LGTM.com installation from OAuth to GitHub App [\#1781](https://github.com/nlohmann/json/issues/1781)
- JSON comparison, contains and operator& [\#1778](https://github.com/nlohmann/json/issues/1778)
- pass a json object to a class contructor adds an array around the object [\#1776](https://github.com/nlohmann/json/issues/1776)
- pass a json object to a class constructor adds an array around the object [\#1776](https://github.com/nlohmann/json/issues/1776)
- 'Float' number\_float\_function\_t template parameter name conflicts with C '\#define Float float' [\#1775](https://github.com/nlohmann/json/issues/1775)
- A weird building problem :-\( [\#1774](https://github.com/nlohmann/json/issues/1774)
- What is this json\_ref? [\#1772](https://github.com/nlohmann/json/issues/1772)
@ -896,7 +896,7 @@ All notable changes to this project will be documented in this file. This projec
- IntelliSense goes crazy on VS2019 [\#1704](https://github.com/nlohmann/json/issues/1704)
- Installing on Ubuntu 16.04 [\#1703](https://github.com/nlohmann/json/issues/1703)
- Where is json::parse now? [\#1702](https://github.com/nlohmann/json/issues/1702)
- Forward header should't be amalgamated [\#1700](https://github.com/nlohmann/json/issues/1700)
- Forward header shouldn't be amalgamated [\#1700](https://github.com/nlohmann/json/issues/1700)
- Json support for Cmake version 2.8.12 [\#1699](https://github.com/nlohmann/json/issues/1699)
- Intruisive scientific notation when using .dump\(\); [\#1698](https://github.com/nlohmann/json/issues/1698)
- Is there support for automatic serialization/deserialization? [\#1696](https://github.com/nlohmann/json/issues/1696)
@ -953,7 +953,7 @@ All notable changes to this project will be documented in this file. This projec
- How can I retrieve uknown strings from json file in my C++ program. [\#1684](https://github.com/nlohmann/json/issues/1684)
- How can I retrieve unknown strings from json file in my C++ program. [\#1684](https://github.com/nlohmann/json/issues/1684)
- contains\(\) is sometimes causing stack-based buffer overrun exceptions [\#1683](https://github.com/nlohmann/json/issues/1683)
- How to deserialize arrays from json [\#1681](https://github.com/nlohmann/json/issues/1681)
- Compilation failed in VS2015 [\#1678](https://github.com/nlohmann/json/issues/1678)
@ -982,7 +982,7 @@ All notable changes to this project will be documented in this file. This projec
- nlohmann VS JsonCpp by C++17 [\#1633](https://github.com/nlohmann/json/issues/1633)
- To integrate an inline helper function that return type name as string [\#1632](https://github.com/nlohmann/json/issues/1632)
- Return JSON as reference [\#1631](https://github.com/nlohmann/json/issues/1631)
- Updating from an older version causes problems with assing a json object to a struct [\#1630](https://github.com/nlohmann/json/issues/1630)
- Updating from an older version causes problems with assigning a json object to a struct [\#1630](https://github.com/nlohmann/json/issues/1630)
- Can without default constructor function for user defined classes when only to\_json is needed? [\#1629](https://github.com/nlohmann/json/issues/1629)
- Compilation fails with clang 6.x-8.x in C++14 mode [\#1628](https://github.com/nlohmann/json/issues/1628)
- Treating floating point as string [\#1627](https://github.com/nlohmann/json/issues/1627)
@ -998,7 +998,7 @@ All notable changes to this project will be documented in this file. This projec
- variant is not support in Release 3.6.1? [\#1615](https://github.com/nlohmann/json/issues/1615)
- Replace assert with throw for const operator\[\] [\#1614](https://github.com/nlohmann/json/issues/1614)
- Memory Overhead is Too High \(10x or more\) [\#1613](https://github.com/nlohmann/json/issues/1613)
- program crash everytime, when other data type incomming in json stream as expected [\#1612](https://github.com/nlohmann/json/issues/1612)
- program crash everytime, when other data type incoming in json stream as expected [\#1612](https://github.com/nlohmann/json/issues/1612)
- Improved Enum Support [\#1611](https://github.com/nlohmann/json/issues/1611)
- is it possible convert json object back to stl container ? [\#1610](https://github.com/nlohmann/json/issues/1610)
- Add C++17-like emplace.back\(\) for arrays. [\#1609](https://github.com/nlohmann/json/issues/1609)
@ -1141,7 +1141,7 @@ All notable changes to this project will be documented in this file. This projec
- How to parse multi object json from file? [\#1470](https://github.com/nlohmann/json/issues/1470)
- How to returns the name of the upper object? [\#1467](https://github.com/nlohmann/json/issues/1467)
- Error: "tuple\_size" has already been declared in the current scope [\#1466](https://github.com/nlohmann/json/issues/1466)
- Checking keys of two jsons against eachother [\#1465](https://github.com/nlohmann/json/issues/1465)
- Checking keys of two jsons against eachother [\#1465](https://github.com/nlohmann/json/issues/1465)
- Disable installation when used as meson subproject [\#1463](https://github.com/nlohmann/json/issues/1463)
- Unpack list of integers to a std::vector\<int\> [\#1460](https://github.com/nlohmann/json/issues/1460)
- Implement DRY definition of JSON representation of a c++ class [\#1459](https://github.com/nlohmann/json/issues/1459)
@ -1185,7 +1185,7 @@ All notable changes to this project will be documented in this file. This projec
- Valid json data not being parsed [\#1075](https://github.com/nlohmann/json/issues/1075)
- Feature request :: Better testing for key existance without try/catch [\#1074](https://github.com/nlohmann/json/issues/1074)
- Feature request :: Better testing for key existence without try/catch [\#1074](https://github.com/nlohmann/json/issues/1074)
- Hi, I have input like a.b.c and want to convert it to \"a\"{\"b\": \"c\"} form. Any suggestions how do I do this? Thanks. [\#1073](https://github.com/nlohmann/json/issues/1073)
- ADL deserializer not picked up for non default-constructible type [\#1072](https://github.com/nlohmann/json/issues/1072)
@ -1547,13 +1547,13 @@ All notable changes to this project will be documented in this file. This projec
- Commented out test cases, should they be removed? [\#1060](https://github.com/nlohmann/json/issues/1060)
- different behaviour between clang and gcc with braced initialization [\#1059](https://github.com/nlohmann/json/issues/1059)
- json array: initialize with prescribed size and `resize` method. [\#1057](https://github.com/nlohmann/json/issues/1057)
- Is it possible to use exceptions istead of assertions? [\#1056](https://github.com/nlohmann/json/issues/1056)
- Is it possible to use exceptions instead of assertions? [\#1056](https://github.com/nlohmann/json/issues/1056)
- when using assign operator in with json object a static assertion fails.. [\#1055](https://github.com/nlohmann/json/issues/1055)
- Iterate over leafs of a JSON data structure: enrich the JSON pointer API [\#1054](https://github.com/nlohmann/json/issues/1054)
- \[Feature request\] Access by path [\#1053](https://github.com/nlohmann/json/issues/1053)
- document that implicit js -\> primitive conversion does not work for std::string::value\_type and why [\#1052](https://github.com/nlohmann/json/issues/1052)
- error: ‘BasicJsonType’ in namespace ‘::’ does not name a type [\#1051](https://github.com/nlohmann/json/issues/1051)
- Destructor is called when filling object through assignement [\#1050](https://github.com/nlohmann/json/issues/1050)
- Destructor is called when filling object through assignment [\#1050](https://github.com/nlohmann/json/issues/1050)
- Is this thing thread safe for reads? [\#1049](https://github.com/nlohmann/json/issues/1049)
- clang-tidy: Call to virtual function during construction [\#1046](https://github.com/nlohmann/json/issues/1046)
- Using STL algorithms with JSON containers with expected results? [\#1045](https://github.com/nlohmann/json/issues/1045)
@ -1787,7 +1787,7 @@ All notable changes to this project will be documented in this file. This projec
- Fix "not constraint" grammar in docs [\#674](https://github.com/nlohmann/json/pull/674) ([wincent](https://github.com/wincent))
- Add documentation for integration with CMake and hunter [\#671](https://github.com/nlohmann/json/pull/671) ([dan-42](https://github.com/dan-42))
- REFACTOR: rewrite CMakeLists.txt for better inlcude and reuse [\#669](https://github.com/nlohmann/json/pull/669) ([dan-42](https://github.com/dan-42))
- REFACTOR: rewrite CMakeLists.txt for better include and reuse [\#669](https://github.com/nlohmann/json/pull/669) ([dan-42](https://github.com/dan-42))
- enable\_testing only if the JSON\_BuildTests is ON [\#666](https://github.com/nlohmann/json/pull/666) ([effolkronium](https://github.com/effolkronium))
- Support moving from rvalues in std::initializer\_list [\#663](https://github.com/nlohmann/json/pull/663) ([himikof](https://github.com/himikof))
- add ensure\_ascii parameter to dump. \#330 [\#654](https://github.com/nlohmann/json/pull/654) ([ryanjmulder](https://github.com/ryanjmulder))
@ -1803,7 +1803,7 @@ All notable changes to this project will be documented in this file. This projec
- \#550 Fix iterator related compiling issues for Intel icc [\#598](https://github.com/nlohmann/json/pull/598) ([HenryRLee](https://github.com/HenryRLee))
- Issue \#593 Fix the arithmetic operators in the iterator and reverse iterator [\#595](https://github.com/nlohmann/json/pull/595) ([HenryRLee](https://github.com/HenryRLee))
- fix doxygen error of basic\_json::get\(\) [\#583](https://github.com/nlohmann/json/pull/583) ([zhaohuaxishi](https://github.com/zhaohuaxishi))
- Fixing assignement for iterator wrapper second, and adding unit test [\#579](https://github.com/nlohmann/json/pull/579) ([Type1J](https://github.com/Type1J))
- Fixing assignment for iterator wrapper second, and adding unit test [\#579](https://github.com/nlohmann/json/pull/579) ([Type1J](https://github.com/Type1J))
- Adding first and second properties to iteration\_proxy\_internal [\#578](https://github.com/nlohmann/json/pull/578) ([Type1J](https://github.com/Type1J))
- Adding support for Meson. [\#576](https://github.com/nlohmann/json/pull/576) ([Type1J](https://github.com/Type1J))
- add enum class default conversions [\#545](https://github.com/nlohmann/json/pull/545) ([theodelrieu](https://github.com/theodelrieu))
@ -1967,7 +1967,7 @@ All notable changes to this project will be documented in this file. This projec
- There is performance inefficiency found by coverity tool json2.1.1/include/nlohmann/json.hpp [\#673](https://github.com/nlohmann/json/issues/673)
- include problem, when cmake on osx [\#672](https://github.com/nlohmann/json/issues/672)
- Operator= ambiguous in C++1z and GCC 7.1.1 [\#670](https://github.com/nlohmann/json/issues/670)
- should't the cmake install target be to nlohman/json.hpp [\#668](https://github.com/nlohmann/json/issues/668)
- shouldn't the cmake install target be to nlohman/json.hpp [\#668](https://github.com/nlohmann/json/issues/668)
- deserialise from `std::vector` [\#667](https://github.com/nlohmann/json/issues/667)
- How to iterate? [\#665](https://github.com/nlohmann/json/issues/665)
- could this json lib work on windows? [\#664](https://github.com/nlohmann/json/issues/664)
@ -2052,7 +2052,7 @@ All notable changes to this project will be documented in this file. This projec
- from\_json declaration order and exceptions [\#561](https://github.com/nlohmann/json/issues/561)
- Tip: Don't upgrade to VS2017 if using json initializer list constructs [\#559](https://github.com/nlohmann/json/issues/559)
- parse error - unexpected end of input [\#558](https://github.com/nlohmann/json/issues/558)
- Cant modify existing numbers inside a json object [\#557](https://github.com/nlohmann/json/issues/557)
- Can't modify existing numbers inside a json object [\#557](https://github.com/nlohmann/json/issues/557)
- Better support for SAX style serialize and deserialize in new version? [\#554](https://github.com/nlohmann/json/issues/554)
- Cannot convert from json array to std::array [\#553](https://github.com/nlohmann/json/issues/553)
- Do not define an unnamed namespace in a header file \(DCL59-CPP\) [\#552](https://github.com/nlohmann/json/issues/552)
@ -2086,7 +2086,7 @@ All notable changes to this project will be documented in this file. This projec
- Comparison of NaN [\#514](https://github.com/nlohmann/json/issues/514)
- why it's not possible to serialize c++11 enums directly [\#513](https://github.com/nlohmann/json/issues/513)
- clang compile error: use of overloaded operator '\<=' is ambiguous with \(nlohmann::json{{"a", 5}}\)\["a"\] \<= 10 [\#512](https://github.com/nlohmann/json/issues/512)
- Why not also look inside the type for \(static\) to\_json and from\_json funtions? [\#511](https://github.com/nlohmann/json/issues/511)
- Why not also look inside the type for \(static\) to\_json and from\_json functions? [\#511](https://github.com/nlohmann/json/issues/511)
@ -198,7 +198,7 @@ JSON does not have a binary type, and this library does not introduce a new type
### MessagePack
[MessagePack](binary_formats/messagepack.md) supports binary values and subtypes. If a subtype is given, the ext family is used. The library will choose the smallest representation among fixext1, fixext2, fixext4, fixext8, ext8, ext16, and ext32. The subtype is then added as singed 8-bit integer.
[MessagePack](binary_formats/messagepack.md) supports binary values and subtypes. If a subtype is given, the ext family is used. The library will choose the smallest representation among fixext1, fixext2, fixext4, fixext8, ext8, ext16, and ext32. The subtype is then added as signed 8-bit integer.
If no subtype is given, the bin family (bin8, bin16, bin32) is used.
@ -282,7 +282,7 @@ If no subtype is given, the bin family (bin8, bin16, bin32) is used.
0x23 0x69 0x01 // '#' i 1 number of object elements
0x69 0x06 // i 6 (length of the key)
0x62 0x69 0x6E 0x61 0x72 0x79 // "binary"
0x24 0x55 // '$' 'U' type of the array elements: unsinged integers
0x24 0x55 // '$' 'U' type of the array elements: unsigned integers
0x23 0x69 0x04 // '#' i 4 number of array elements
@ -100,7 +100,7 @@ for (auto& [key, val] : j_object.items())
!!! warning
Using `items()` on temporary objects is dangerous. Make sure the object's lifetime exeeds the iteration. See <https://github.com/nlohmann/json/issues/2040> for more information.
Using `items()` on temporary objects is dangerous. Make sure the object's lifetime exceeds the iteration. See <https://github.com/nlohmann/json/issues/2040> for more information.
@ -177,7 +177,7 @@ This error indicates a syntax error while deserializing a JSON text. The error m
!!! tip
- Make sure the input is correctly read. Try to write the input to standard output to check if, for instance, the input file was successfully openened.
- Make sure the input is correctly read. Try to write the input to standard output to check if, for instance, the input file was successfully opened.
- Paste the input to a JSON validator like <http://jsonlint.com> or a tool like [jq](https://stedolan.github.io/jq/).
@ -468,7 +468,7 @@ This release further fixes several bugs in the library. All changes are backward
- allow compare user-defined string types (#1130)
- better support for algorithms using iterators from `items()` (#1045, #1134)
- added parameter to avoid compilation error with MSVC 2015 debug builds (#1114)
- re-added accidentially skipped unit tests (#1176)
- re-added accidentally skipped unit tests (#1176)
- fixed MSVC issue with `std::swap` (#1168)
### :zap: Improvements
@ -1008,7 +1008,7 @@ This release fixes a few bugs in the JSON parser found in the [Parsing JSON is a
This release fixes the semantics of `operator[]` for JSON Pointers (see below). This fix is backwards compatible.
### Changes
- **`operator[]` for JSON Pointers** now behaves like the other versions of `operator[]` and transforms `null` values into objects or arrays if required. This allows to created nested structues like `j["/foo/bar/2"] = 17` (yielding `{"foo": "bar": [null, null, 17]}`) without problems.
- **`operator[]` for JSON Pointers** now behaves like the other versions of `operator[]` and transforms `null` values into objects or arrays if required. This allows to created nested structures like `j["/foo/bar/2"] = 17` (yielding `{"foo": "bar": [null, null, 17]}`) without problems.
- overworked a helper SFINAE function
- fixed some documentation issues
- fixed the CMake files to allow to run the test suite outside the main project directory
@ -1093,7 +1093,7 @@ This release combines a lot of small fixes and improvements. The release is back
### Changes
- The **parser** has been overworked, and a lot of small issues have been fixed:
- Improved parser performance by avoiding recursion and using move semantics for the return value.
- Unescaped control charaters `\x10`-`\x1f` are not accepted any more.
- Unescaped control characters `\x10`-`\x1f` are not accepted any more.
- Fixed a bug in the parser when reading from an input stream.
- Improved test case coverage for UTF-8 parsing: now, all valid Unicode code points are tested both escaped and unescaped.
- The precision of output streams is now preserved by the parser.
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Dirk Stolle