Ideas for new features

[danielaparker]

Proposed new features that are currently on the list are as follows:

• Allow a basic_json value to hold non-owning views of other basic_json values.

• Support for 128 bit integer types __int128 and unsigned __int128, if supported on the platform.

• A cddl extension that implements CDDL, specifically for validating CBOR data structures, but also applicable to JSON and other JSON-like formats.

• Support for 128 bit floating point type __float128, if supported on the platform. This would allow support for binary128 type in CBOR typed arrays and decimal128 in BSON.

• Support encoding typed arrays as UBJSON strongly typed arrays.

• Enhanced support for result and temporary stateful allocators.

• Support user-defined functions in the jmespath extension

• A JSON encoder that supports RFC 8785 - JSON Canonicalization Scheme

• Add support for char8_t if C++20

• Traits specializations that encode sequence containers of std::byte to byte strings in CBOR, MessagePack and BSON.

• Support encoding CBOR and MessagePack data formats with more general keys.

• Support JSONPath functions in the emerging SQL/JSON standard.

Comments and suggestions for other new features welcome.