Release date: 2019-11-06

SHA-256: b5ba7228f3c22a882d379e93d08eab4349458ee16fbf45291347994eac7dc7ce (json.hpp), 77b9f54b34e7989e6f402afb516f7ff2830df551c3a36973085e2c7a6b1045fe (include.zip)

This release fixes several small bugs in the library. All changes are backward-compatible.

- Fixed a segmentation fault when serializing `std::int64_t` minimum value. #1708 #1722
- Fixed the [`contains()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_ab23b04802eb9da97dc3f664e54e09cb3.html#ab23b04802eb9da97dc3f664e54e09cb3) function for JSON Pointers. #1727 #1741
- Fixed too lax SFINAE guard for conversion from `std::pair` and `std::tuple` to `json`. #1805 #1806 #1825 #1826
- Fixed some regressions detected by UBSAN. Updated CI to use Clang-Tidy 7.1.0. #1716 #1728
- Fixed integer truncation in `iteration_proxy`. #1797
- Updated [Hedley](https://github.com/nemequ/hedley) to v11 to [fix a E2512 error](https://github.com/nemequ/hedley/issues/28) in MSVC. #1799
- Fixed a compile error in enum deserialization of non non-default-constructible types. #1647 #1821
- Fixed the conversion from `json` to `std::valarray`.

- The [`items()`](https://nlohmann.github.io/json/classnlohmann_1_1basic__json_afe3e137ace692efa08590d8df40f58dd.html#afe3e137ace692efa08590d8df40f58dd) function can now be used with a custom string type. #1765
- Made [`json_pointer::back`](https://nlohmann.github.io/json/classnlohmann_1_1json__pointer_a213bc67c32a30c68ac6bf06f5195d482.html#a213bc67c32a30c68ac6bf06f5195d482) `const`. #1764 #1769
- Meson is part of the release archive. #1672 #1694
- Improved documentation on the Meson and Spack package manager. #1694 #1720

- Added GitHub Workflow with `ubuntu-latest`/GCC 7.4.0 as CI step.
- Added GCC 9 to Travis CI to compile with C++20 support. #1724
- Added MSVC 2019 to the AppVeyor CI. #1780
- Added badge to [fuzzing status](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:json).
- Fixed some cppcheck warnings. #1760
- Fixed several typos in the documentation. #1720 #1767 #1803
- Added documentation on the `JSON_THROW_USER`, `JSON_TRY_USER`, and `JSON_CATCH_USER` macros to control user-defined exception handling.
- Used GitHub's [CODEOWNERS](https://github.com/nlohmann/json/blob/develop/.github/CODEOWNERS) and [SECURITY](https://github.com/nlohmann/json/blob/develop/.github/SECURITY.md) feature.
- Removed `GLOB` from CMake files. #1779
- Updated to [Doctest](https://github.com/onqtam/doctest) 2.3.5.

This release does not deprecate any functions. As an overview, 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`](http://nlohmann.github.io/json/classnlohmann_1_1basic__json_af1592a06bc63811886ade4f9d965045e.html#af1592a06bc63811886ade4f9d965045e) are deprecated. Please use the member function [`items()`](http://nlohmann.github.io/json/classnlohmann_1_1basic__json_afe3e137ace692efa08590d8df40f58dd.html#afe3e137ace692efa08590d8df40f58dd) instead.
- Functions [`friend std::istream& operator<<(basic_json&, std::istream&)`](http://nlohmann.github.io/json/classnlohmann_1_1basic__json_ab7285a92514fcdbe6de505ebaba92ea3.html#ab7285a92514fcdbe6de505ebaba92ea3) and [`friend std::ostream& operator>>(const basic_json&, std::ostream&)`](http://nlohmann.github.io/json/classnlohmann_1_1basic__json_a9e06deabe69262c3ffc5533d32856983.html#a9e06deabe69262c3ffc5533d32856983) are deprecated. Please use [`friend std::istream&  operator>>(std::istream&, basic_json&)`](http://nlohmann.github.io/json/classnlohmann_1_1basic__json_aaf363408931d76472ded14017e59c9e8.html#aaf363408931d76472ded14017e59c9e8) and [`friend operator<<(std::ostream&, const basic_json&)`](http://nlohmann.github.io/json/classnlohmann_1_1basic__json_a5e34c5435e557d0bf666bd7311211405.html#a5e34c5435e557d0bf666bd7311211405) instead.