| 1 | // RUN: %clang_cc1 -std=c++11 -verify %s |
| 2 | |
| 3 | // The implicit specialization of a class template specialuzation causes the |
| 4 | // implicit instantiation of the declarations, but not the definitions or |
| 5 | // default arguments, of: |
| 6 | |
| 7 | // FIXME: Many omitted cases |
| 8 | |
| 9 | // - scoped member enumerations |
| 10 | namespace ScopedEnum { |
| 11 | template<typename T> struct ScopedEnum1 { |
| 12 | enum class E { |
| 13 | e = T::error // expected-error {{'double' cannot be used prior to '::'}} |
| 14 | }; |
| 15 | }; |
| 16 | ScopedEnum1<int> se1; // ok |
| 17 | |
| 18 | template<typename T> struct ScopedEnum2 { |
| 19 | enum class E : T { // expected-error {{non-integral type 'void *' is an invalid underlying type}} |
| 20 | e = 0 |
| 21 | }; |
| 22 | }; |
| 23 | ScopedEnum2<void*> se2; // expected-note {{here}} |
| 24 | |
| 25 | template<typename T> struct UnscopedEnum3 { |
| 26 | enum class E : T { |
| 27 | e = 4 |
| 28 | }; |
| 29 | int arr[(int)E::e]; |
| 30 | }; |
| 31 | UnscopedEnum3<int> ue3; // ok |
| 32 | |
| 33 | ScopedEnum1<double>::E e1; // ok |
| 34 | ScopedEnum1<double>::E e2 = decltype(e2)::e; // expected-note {{in instantiation of enumeration 'ScopedEnum::ScopedEnum1<double>::E' requested here}} |
| 35 | |
| 36 | // DR1484 specifies that enumerations cannot be separately instantiated, |
| 37 | // they will be instantiated with the rest of the template declaration. |
| 38 | template<typename T> |
| 39 | int f() { |
| 40 | enum class E { |
| 41 | e = T::error // expected-error {{has no members}} |
| 42 | }; |
| 43 | return (int)E(); |
| 44 | } |
| 45 | int test1 = f<int>(); // expected-note {{here}} |
| 46 | |
| 47 | template<typename T> |
| 48 | int g() { |
| 49 | enum class E { |
| 50 | e = T::error // expected-error {{has no members}} |
| 51 | }; |
| 52 | return E::e; |
| 53 | } |
| 54 | int test2 = g<int>(); // expected-note {{here}} |
| 55 | } |
| 56 | |
| 57 | // - static data members |
| 58 | namespace StaticDataMembers { |
| 59 | template<typename T> |
| 60 | struct A { |
| 61 | static const int n = T::error; // expected-error {{has no members}} |
| 62 | static inline int m = T::error; // expected-warning {{extension}} |
| 63 | }; |
| 64 | A<int> ai; // expected-note {{here}} |
| 65 | } |
| 66 | |
| 67 | // And it cases the implicit instantiations of the definitions of: |
| 68 | |
| 69 | // - unscoped member enumerations |
| 70 | namespace UnscopedEnum { |
| 71 | template<typename T> struct UnscopedEnum1 { |
| 72 | enum E { |
| 73 | e = T::error // expected-error {{'int' cannot be used prior to '::'}} |
| 74 | }; |
| 75 | }; |
| 76 | UnscopedEnum1<int> ue1; // expected-note {{here}} |
| 77 | |
| 78 | template<typename T> struct UnscopedEnum2 { |
| 79 | enum E : T { // expected-error {{non-integral type 'void *' is an invalid underlying type}} |
| 80 | e = 0 |
| 81 | }; |
| 82 | }; |
| 83 | UnscopedEnum2<void*> ue2; // expected-note {{here}} |
| 84 | |
| 85 | template<typename T> struct UnscopedEnum3 { |
| 86 | enum E : T { |
| 87 | e = 4 |
| 88 | }; |
| 89 | int arr[E::e]; |
| 90 | }; |
| 91 | UnscopedEnum3<int> ue3; // ok |
| 92 | |
| 93 | template<typename T> |
| 94 | int f() { |
| 95 | enum E { |
| 96 | e = T::error // expected-error {{has no members}} |
| 97 | }; |
| 98 | return (int)E(); |
| 99 | } |
| 100 | int test1 = f<int>(); // expected-note {{here}} |
| 101 | |
| 102 | template<typename T> |
| 103 | int g() { |
| 104 | enum E { |
| 105 | e = T::error // expected-error {{has no members}} |
| 106 | }; |
| 107 | return E::e; |
| 108 | } |
| 109 | int test2 = g<int>(); // expected-note {{here}} |
| 110 | } |
| 111 | |
| 112 | // FIXME: |
| 113 | //- - member anonymous unions |
| 114 | |