User-defined conversions

[Timeroot]

Supporting user-defined conversions (see https://en.cppreference.com/w/cpp/language/cast_operator ) would be a much cleaner alternative to the current .get<T>() syntax -- and you could continue to have both. Code of the form

std::string str = json_obj["some key"].get<std::string>();

could become

std::string str = json_obj["some key"];