[Bug c++/124823] Dollar signs should generate a pedantic warning

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124823

--- Comment #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
This was a really old extension that was decided over the years not to even
want with pedantic due to its usage in some places.