https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87413
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- It's a GNU extension in C++, so we can decide whether it's valid or not.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87413
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- It's a GNU extension in C++, so we can decide whether it's valid or not.