[Bug c++/98940] Implement C++23 language features

[nshead at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98940
Bug 98940 depends on bug 107688, which changed state.

Bug 107688 Summary: [C++23] P2615 - Meaningful exports
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107688

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED