Adding basic json types (string, number, object, array, boolean, etc..) to json_fwd.hpp

[juhasz2gabor]

Hi,

This feature idea is related to this : #4474

At my company we replace our old json library with nlohman::json. We found that
json_fwd.hpp does not contain the exact json types but just the general json type.
So if we have overloaded functions with different json types we can do it just ugly way,
e.g.
void f(std::map<std::string, nlohmann::json, std::less<>> & jsonObject)
instead of
void f(nlohmann::json::object_t &jsonObject)

or we do not know the exact type of json. It was supported by our old json library.

Can you add the basic json types (object_t, array_t, etc) forward declarations to json_fwd.hpp if it is possible.

Thanks & Kind regards,
Gabor

[gregmarr]

No, I don't think it is possible. object_t and array_t are aliases that depend on the types of the template parameters.

Why are you trying to use the subtypes instead of the basic_json type in your functions?