[Bug c++/104514] add feature to create a pointer to a fixed address as constexpr

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104514

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is forbidden by C++, but I've started writing a proposal for a language
feature to support this use case