There is a nasty trick which uses structured binding to convert an arbitrary aggregate to a tuple.

That still doesn't help if you want the fields names.

You have any link?

Something like this: https://github.com/apolukhin/magic_get

Thanks. This may be useful for me someday.

No, because C++ templates are basically a Lisp, and only things that are list-like can be processed by templates. (Like tuples, for example.)

That's a bit confusing. Lisp has all kinds of datatypes.

But you are right that C++ templates are a bad functional programming language with duck typing.

But there are automated ways to to convert aggregates to tuples.