New Features

• Structured bindings are now supported for JSON objects and arrays via the items() member function, so finally this code is possible:

    for (auto& [key, val] : j.items()) {
        std::cout << key << ':' << val << '\n';
    }

• Added support for reading from FILE* to support situations in which streams are nit available or would require too much RAM. #1370 #1392

Bug Fixes

• The eofbit was not set for input streams when the end of a stream was reached while parsing. #1340 #1343
• Fixed a bug in the SAX parser for BSON arrays.

Improvements

• Added support for Clang 5.0.1 (PS4 version). #1341 #1342

Further Changes

• Added a warning for implicit conversions to the documentation: It is not recommended to use implicit conversions when reading from a JSON value. Details about this recommendation can be found here. #1363
• Fixed typos in the documentation. #1329 #1380 #1382
• Fixed a C4800 warning. #1364
• Fixed a -Wshadow warning #1346
• Wrapped std::snprintf calls to avoid error in MSVC. #1337
• Added code to allow installation via Meson. #1345

Deprecated functions

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 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.