Pass member pointers to callback function

[salaadas]

Hi,

I just started using this library and it is really great! Thanks a lot. I do wish to have the member pointers along side the type info in the callback function, however. That would save a lot of declarations as I usually introspect and then modify the values inside a struct so that would help tremendously.

Previously, I used this https://github.com/Mizuchi/ForeachMember, so maybe you can take inspirations from them!

Thanks again.