Borsh for C++20

borsh-cpp20 is an implementation of the borsh serialization specification for C++20.

Motivation

Basically, at the time of writing there was no feature complete borsh serializer / deserializer implementation available for C++ at all, so this code is an attempt to fill that gap.

Current state

The library isn't ready for production, and the code is published just for building in public. Please don't use it until it is.

Below is a list of types specified in the Rust specification, with the ones implemented checked. Every checked type is tested to be binary compatible with the borsh specification:

• Integers (int8_t, int16_t, int32_t, int64_t, __int128, uint8_t, uint16_t, uint32_t, uint64_t, unsigned __int128, bool)
• Bool
• Floats (float, double, long double)
• Unit (std::monostate), a noop in Borsh
• Fixed sized arrays (C-style array[], std::array)
• Dynamic sized array (std::vector)
• Struct
• Named fields
• Enum
• HashMap (std::unordered_map)
• HashSet (std::unordered_set)
• Option (std::optional)
• String (std::string)

The following types don't have a direct equivalent in C++:

• Unnamed fields