[Bug libstdc++/100384] Compiling in c++17 mode breaks compilation of functions named visit()

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100384

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Possibly, but it needs to be constrained for p2162 anyway, which I'm doing via
the return type.