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