[Bug c++/94973] compile error when trying to use pointer-to-member function as invokable projection to ranges::find()

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94973

--- Comment #17 from Jonathan Wakely <redi at gcc dot gnu.org> ---
They're on by default for mingw, for compatibility with the MS compiler (but in
this case it seems the relevant extension is ancient history).