:bug: Bug Fixes

• Fix the value function which was broken for strings, size types, and nullptr in release 3.11.0. #3652 #3655 #3663
• Fix the json_fwd.hpp header to be self-contained and add it to the single-header release. #3656 #3679 #3687
• Fix regression that broke using json_pointer as key in associative containers. #3680 #3685
• Add missing constraint to deprecated JSON Pointer overloads of contains and at. #3658 #3681
• Fix comparison between json_pointer and strings with == and !=. These comparisons worked in 3.10.5, but were broken in 3.11.0 and 3.11.1. #3654 #3664
• Fix to_json conversion of std::vector<bool>::reference and std::vector<bool>::const_reference for STLs where these are the same as basic_json::boolean_t& and basic_json::boolean_t, respectively. #3677 #3678

:zap: Improvements

• Restructure inline namespace and allow version component to be disabled. See documentation. #3683 #3696 #3697 #3698
• Avoid heap allocations in BJData parser. #3637

:hammer: Further Changes

Documentation

• Publish documentation on every push to develop branch. #3660 #3673
• Add missing examples for the public API. #3672 #3686
• Fix typo in json_pointer documentation. #3692

Community

• Add a badge for the Discord chat to the README file. The goal of that additional communication channel beyond the existing ones is to quickly coordinate between the contributors. #3651
• Complete contributor list. #3662 #3670

CI

• Remove the macos-10.15 image from the CI as it is removed by GitHub Actions. #3612 #3615 #3626
• Remove hardcoded paths in Ubuntu workflow. #3626
• Only trigger AppVeyor builds if relevant files have been changed. #3626
• Fix CodeQL warning. #3626
• Harmonize naming of GitHub Actions jobs. #3661
• Add labeler action to automatically add PR labels based on the changed files. #3671 #3674 #3675
• Lint API documentation in the CI. #3672
• Add local LGTM configuration and suppress warnings on third-party scripts. #3643

:fire: Deprecated functions

• This release deprecates comparing JSON Pointers with strings via operator== and operator!=. To compare a json_pointer p with a string s, convert s to a json_pointer first and use json_pointer::operator== or json_pointer::operator!=. #3684

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

• The function iterator_wrapper is 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 two iterators; for instance, call basic_json::from_cbor(ptr, ptr+len) instead of basic_json::from_cbor({ptr, len}).
• The implicit conversion from JSON Pointers to string (json_pointer::operator string_t) is deprecated. Use json_pointer::to_string instead.

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