[Bug libstdc++/119899] Custom invoke has name collision with std::invoke, without using namespace std

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119899

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Frederik vom Hofe from comment #0)
> This happens with GCC and Clang. So I assume this is a libgcc issue.
> MSVC accepts this code.

It accepts it, but it calls std::invoke not customNamespace::invoke, so does
not do what you think it does.

I'm not sure why MSVC does that, it seems like a bug in MSVC.