This needs a test that we complain about a specialization of an unscoped
enum. Perhaps just the test from 14.7p6??
template<class T> struct A {
enum E: T;
enum class S: T;
};
template<> enum A<int>::E: int { eint }; // OK
template<> enum class A<int>::S: int { sint }; // OK
template<class T> enum A<T>::E: T { eT };
template<class T> enum class A<T>::S: T { sT };
template<> enum A<char>::E: int { echar }; // ill-formed,
A<char>::E was instantiated when A<char> was instantiated
template<> enum class A<char>::S: int { schar }; // OK
