[Bug c/120978] Punctuators that contain # or %: are incorrectly rejected within attributes

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120978

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The C23 spec says:
any token other than a parenthesis, a bracket, or a brace

But # is not a token in C; it is only a preprocessor token ...