Consider this example:

 struct A { static void f(A); void f(this A); void g(); }; void A::g() { (&A::f)(A()); // #1 (&A::f)(); // #2 } 

What should happen for #1? One possible answer is that the /member-specification/ of A is ill-formed because of conflicting declarations for f. That would also allow mangling the explicit-object member function A::f the same as the static member function.

See CWG2692