[Bug c++/88323] implement C++20 language features.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88323
Bug 88323 depends on bug 90537, which changed state.

Bug 90537 Summary: Implement P1286R2, Contra CWG DR1778
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90537

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