Incorrect example for member access expression with `using enum` in [enum.udecl] CWG2959

[enum.udecl]/2 contains this example:

enum class fruit { orange, apple };
struct S {
  using enum fruit;             // OK, introduces orange and apple into S
};
void f() {
  S s;
  s.orange;                     // OK, names fruit​::​orange
  S::orange;                    // OK, names fruit​::​orange
}

While it is correct that name lookup for orange in s.orange will find fruit::orange, the member access expression itself is not ok, because [expr.ref]/7.5 only specifies its behavior for member enumerators. using enum however doesn't make the enumerator a member enumerator ([class.mem.general]/3.5, [class.mem.general]/4).

Currently [expr.ref] simply lacks a statement about the behavior in this situation, but CWG issue 2902's proposed resolution would clarify that it is ill-formed.

From issue reported to Clang here.

Review the example in [enum.udecl]/2 alongside [expr.ref]/7.5 and [class.mem.general]/3.5 and /4. Read the proposed resolution for CWG issue 2902 and the linked Clang report first. Done means the draft's example and wording accurately describe member access through a name introduced by using enum.