[Bug c++/115888] GCC rejects valid program involving explict object member function

[jlame646 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115888

--- Comment #2 from Jason Liam <jlame646 at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> https://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#2688

This is not CWG2688. Note that in the given example here,  gcc and clang
rejects `decltype(C::f)`. That is, the issue is with `decltype(C::f)` not the
function call itself. So , this has nothing to do with CWG2688 and is a
separate issue.