https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117410
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #2) > I think the reason GCC rejects the original one is because it's the only > compiler that correctly implements P2113. Clang apparently supports P2113 since version 16.
