[Bug c++/110343] [C++26] P2558R2 - Add @, $, and ` to the basic character set

[emsr at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110343

--- Comment #10 from Ed Smith-Rowland <emsr at gcc dot gnu.org> ---
Sorry I was out for a while.
I was trying to figure out if there was some table of allowed characters we
should use. Also, C23 needs this too IIUC and I was wondering if we should
coordinate.

It looks like you got it though.