1// RUN: %clang_cc1 -std=c++11 -verify %s
2
3struct Base {
4  static const int a = 1;
5};
6template<typename T> struct S : Base {
7  enum E : int;
8  constexpr int f();
9  constexpr int g(); // expected-note {{declared here}}
10  void h();
11};
12template<> enum S<char>::E : int {}; // expected-note {{enum 'S<char>::E' was explicitly specialized here}}
13template<> enum S<short>::E : int { b = 2 };
14template<> enum S<int>::E : int { a = 4 };
15template<typename T> enum S<T>::E : int { b = 8 };
16
17// The unqualified-id here names a member of the non-dependent base class Base
18// and not the injected enumerator name 'a' from the specialization.
19template<typename T> constexpr int S<T>::f() { return a; }
20static_assert(S<char>().f() == 1, "");
21static_assert(S<int>().f() == 1, "");
22
23// The unqualified-id here names a member of the current instantiation, which
24// bizarrely might not exist in some instantiations.
25template<typename T> constexpr int S<T>::g() { return b; } // expected-error {{enumerator 'b' does not exist in instantiation of 'S<char>'}}
26static_assert(S<char>().g() == 1, ""); // expected-note {{here}} expected-error {{not an integral constant expression}} expected-note {{undefined}}
27static_assert(S<short>().g() == 2, "");
28static_assert(S<long>().g() == 8, "");
29
30// 'b' is type-dependent, so these assertions should not fire before 'h' is
31// instantiated.
32template<typename T> void S<T>::h() {
33  char c[S<T>::b];
34  static_assert(b != 8, "");
35  static_assert(sizeof(c) != 8, "");
36}
37void f() {
38  S<short>().h(); // ok, b == 2
39}
40