[Bug c++/109936] error: extended character ≠ is not valid in an identifier

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109936

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1949r7.html
is the most relevant paper.