Using custom types for scalars?

[kyku]

I'm serializing some decimal values from database into JSON. In order not to risk loosing precision of database data, I've implemented a C++ class for storing values in fixed decimal form. I'm trying to pass my class as NumberFloatType template parameter to basic_json but it looks like parsing of floating point values is hard coded in lexer::strtof overloads. Are there any "customization points" which could be used to support deserialization of strings into custom basic types like NumberFloatType?

[nlohmann]

I'm afraid this is not possible in the moment, and I am not sure how to realize this right now.