C++20 Function for converting arbitrary structs to json without serialisers

[ptesavol]

I wrote a templated function nlohmann::json structToJson(anyStruct) that can convert arbitrary structs to nlohmann::json without the need of writing serialisers. Implementing the function was made possible by C++20 and boost::pfr. The function is still at proof-of-concept stage, but it can already convert quite complex nested structs that have maps and vectors of user-defined data types as members.

You can try it out with the Compiler Explorer at https://godbolt.org/z/TKEo65aje

It would be nice to have similar functionality in the library itself, but I understand that it might not be realistic because of the requirement for C++20 and boost::pfr