1 // RUN: %clang_cc1 -verify %s -fcxx-exceptions -std=c++1y 2 3 namespace N {} 4 5 template<typename T, // expected-note {{declared here}} 6 typename T> struct X {}; // expected-error {{declaration of 'T' shadows template parameter}} 7 8 template<typename T> struct Y { // expected-note 18{{declared here}} 9 template<typename T> struct A {}; // expected-error {{declaration of 'T' shadows template parameter}} 10 11 struct B { 12 template<typename> struct T {}; // expected-error {{declaration of 'T' shadows template parameter}} 13 }; 14 struct C { 15 template<typename> void T(); // expected-error {{declaration of 'T' shadows template parameter}} 16 }; 17 struct D { 18 struct T {}; // expected-error {{declaration of 'T' shadows template parameter}} 19 }; 20 struct E { 21 typedef int T; // expected-error {{declaration of 'T' shadows template parameter}} 22 }; 23 struct F { 24 using T = int; // expected-error {{declaration of 'T' shadows template parameter}} 25 }; 26 struct G { 27 int T; // expected-error {{declaration of 'T' shadows template parameter}} 28 }; 29 struct H { 30 static int T; // expected-error {{declaration of 'T' shadows template parameter}} 31 }; 32 struct I { 33 void T(); // expected-error {{declaration of 'T' shadows template parameter}} 34 }; 35 struct J { 36 enum T { e }; // expected-error {{declaration of 'T' shadows template parameter}} 37 }; 38 struct K { 39 enum E { T }; // expected-error {{declaration of 'T' shadows template parameter}} 40 }; 41 42 void a() { 43 extern int T; // expected-error {{declaration of 'T' shadows template parameter}} 44 } 45 void b() { 46 int T; // expected-error {{declaration of 'T' shadows template parameter}} 47 } 48 void c() { 49 try {} 50 catch (int T) {} // expected-error {{declaration of 'T' shadows template parameter}} 51 } 52 void d() { 53 void T(); // expected-error {{declaration of 'T' shadows template parameter}} 54 } 55 void e() { 56 namespace T = N; // expected-error {{declaration of 'T' shadows template parameter}} 57 } 58 59 // FIXME: These diagnostics are poorly worded. Lookup for the elaborated type 60 // specifier finds the template parameter in this case, which is ill-formed 61 // because it's not a struct. 62 void f() { 63 struct T *p; // expected-error {{declaration of 'T' shadows template parameter}} 64 } 65 friend struct T; // expected-error {{declaration of 'T' shadows template parameter}} 66 }; 67 68 template<int T> struct Z { // expected-note 16{{declared here}} 69 template<typename T> struct A {}; // expected-error {{declaration of 'T' shadows template parameter}} 70 71 struct B { 72 template<typename> struct T {}; // expected-error {{declaration of 'T' shadows template parameter}} 73 }; 74 struct C { 75 template<typename> void T(); // expected-error {{declaration of 'T' shadows template parameter}} 76 }; 77 struct D { 78 struct T {}; // expected-error {{declaration of 'T' shadows template parameter}} 79 }; 80 struct E { 81 typedef int T; // expected-error {{declaration of 'T' shadows template parameter}} 82 }; 83 struct F { 84 using T = int; // expected-error {{declaration of 'T' shadows template parameter}} 85 }; 86 struct G { 87 int T; // expected-error {{declaration of 'T' shadows template parameter}} 88 }; 89 struct H { 90 static int T; // expected-error {{declaration of 'T' shadows template parameter}} 91 }; 92 struct I { 93 void T(); // expected-error {{declaration of 'T' shadows template parameter}} 94 }; 95 struct J { 96 enum T { e }; // expected-error {{declaration of 'T' shadows template parameter}} 97 }; 98 struct K { 99 enum E { T }; // expected-error {{declaration of 'T' shadows template parameter}} 100 }; 101 102 void a() { 103 extern int T; // expected-error {{declaration of 'T' shadows template parameter}} 104 } 105 void b() { 106 int T; // expected-error {{declaration of 'T' shadows template parameter}} 107 } 108 void c() { 109 try {} 110 catch (int T) {} // expected-error {{declaration of 'T' shadows template parameter}} 111 } 112 void d() { 113 void T(); // expected-error {{declaration of 'T' shadows template parameter}} 114 } 115 void e() { 116 namespace T = N; // expected-error {{declaration of 'T' shadows template parameter}} 117 } 118 119 // These cases are valid when 'T' is a non-type template parameter, as T 120 // names an injected struct ::T, which doesn't shadow the template parameter. 121 void f() { 122 struct T *p; 123 } 124 friend struct T; 125 }; 126 127 template<typename T> // expected-note {{declared here}} 128 void f(int T) {} // expected-error {{declaration of 'T' shadows template parameter}} 129 130 // FIXME: These are ill-formed: a template-parameter shall not have the same name as the template name. 131 namespace A { 132 template<typename T> struct T {}; // expected-error{{declaration of 'T' shadows template parameter}} 133 // expected-note@-1{{template parameter is declared here}} 134 } 135 namespace B { 136 template<typename T> void T() {} 137 } 138 namespace C { 139 template<typename T> int T; 140 } 141 142 namespace PR28023 { 143 template<int V> // expected-note{{template parameter is declared here}} 144 struct A { 145 struct B { 146 template <int> friend struct V; // expected-error{{declaration of 'V' shadows template parameter}} 147 }; 148 }; 149 A<0>::B a; 150 } 151
