bogus function overload error using enum from class

[urnathan]

struct S {
  enum M { Mask = 1 };
};

void Frob () {
  using enum S::M;
  void (~(Mask));
}

build/bin/clang "-cc1" "-triple" "x86_64-redhat-linux-gnu" "-emit-obj" -std=c++20 using-enum.ii

using-enum.ii:7:10: error: reference to overloaded function could not be resolved; did you mean to call it?
  void (~(Mask));
         ^~~~~~
using-enum.ii:2:12: note: possible target for call
  enum M { Mask = 1 };
           ^
1 error generated.

guess I missed something with 'using enum'

[llvmbot]

@llvm/issue-subscribers-clang-frontend

[shafik]

PR: https://reviews.llvm.org/D138091