https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109482
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- I did try it. It's also not valid in older standards, so would give pedantic warnings with -Wsystem-headers
redi at gcc dot gnu.org via Gcc-bugs Wed, 12 Apr 2023 05:59:26 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109482
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- I did try it. It's also not valid in older standards, so would give pedantic warnings with -Wsystem-headers