1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s 2 3 // This test concerns the identity of dependent types within the 4 // canonical type system. This corresponds to C++ [temp.type], which 5 // specifies type equivalence within a template. 6 // 7 // FIXME: template template parameters 8 9 namespace N { 10 template<typename T> 11 struct X2 { 12 template<typename U> 13 struct apply { 14 typedef U* type; 15 }; 16 }; 17 } 18 19 namespace Nalias = N; 20 21 template<typename T> 22 struct X0 { }; 23 24 using namespace N; 25 26 template<typename T, typename U> 27 struct X1 { 28 typedef T type; 29 typedef U U_type; 30 31 void f0(T); // expected-note{{previous}} 32 void f0(U); 33 void f0(type); // expected-error{{redeclar}} 34 35 void f1(T*); // expected-note{{previous}} 36 void f1(U*); 37 void f1(type*); // expected-error{{redeclar}} 38 39 void f2(X0<T>*); // expected-note{{previous}} 40 void f2(X0<U>*); 41 void f2(X0<type>*); // expected-error{{redeclar}} 42 43 void f3(X0<T>*); // expected-note{{previous}} 44 void f3(X0<U>*); 45 void f3(::X0<type>*); // expected-error{{redeclar}} 46 47 void f4(typename T::template apply<U>*); // expected-note{{previous}} 48 void f4(typename U::template apply<U>*); 49 void f4(typename type::template apply<T>*); 50 void f4(typename type::template apply<U_type>*); // expected-error{{redeclar}} 51 52 void f5(typename T::template apply<U>::type*); // expected-note{{previous}} 53 void f5(typename U::template apply<U>::type*); 54 void f5(typename U::template apply<T>::type*); 55 void f5(typename type::template apply<T>::type*); 56 void f5(typename type::template apply<U_type>::type*); // expected-error{{redeclar}} 57 58 void f6(typename N::X2<T>::template apply<U> *); // expected-note{{previous}} 59 void f6(typename N::X2<U>::template apply<U> *); 60 void f6(typename N::X2<U>::template apply<T> *); 61 void f6(typename ::N::X2<type>::template apply<U_type> *); // expected-error{{redeclar}} 62 63 void f7(typename N::X2<T>::template apply<U> *); // expected-note{{previous}} 64 void f7(typename N::X2<U>::template apply<U> *); 65 void f7(typename N::X2<U>::template apply<T> *); 66 void f7(typename X2<type>::template apply<U_type> *); // expected-error{{redeclar}} 67 68 void f8(typename N::X2<T>::template apply<U> *); // expected-note{{previous}} 69 void f8(typename N::X2<U>::template apply<U> *); 70 void f8(typename N::X2<U>::template apply<T> *); 71 void f8(typename ::Nalias::X2<type>::template apply<U_type> *); // expected-error{{redeclar}} 72 }; 73 74 namespace PR6851 { 75 template <bool v> 76 struct S; 77 78 struct N { 79 template <bool w> 80 S< S<w>::cond && 1 > foo(); 81 }; 82 83 struct Alien; 84 bool operator&&(const Alien&, const Alien&); 85 86 template <bool w> 87 S< S<w>::cond && 1 > N::foo() { } 88 } 89 90 namespace PR7460 { 91 template <typename T> 92 struct TemplateClass2 93 { 94 enum { SIZE = 100 }; 95 static T member[SIZE]; 96 }; 97 98 template <typename T> 99 T TemplateClass2<T>::member[TemplateClass2<T>::SIZE]; 100 } 101 102 namespace PR18275 { 103 template<typename T> struct A { 104 void f(const int); 105 void g(int); 106 void h(const T); 107 void i(T); 108 }; 109 110 template<typename T> 111 void A<T>::f(int x) { x = 0; } 112 113 template<typename T> 114 void A<T>::g(const int x) { // expected-note {{declared const here}} 115 x = 0; // expected-error {{cannot assign to variable 'x'}} 116 } 117 118 template<typename T> 119 void A<T>::h(T) {} // FIXME: Should reject this. Type is different from prior decl if T is an array type. 120 121 template<typename T> 122 void A<T>::i(const T) {} // FIXME: Should reject this. Type is different from prior decl if T is an array type. 123 124 template struct A<int>; 125 template struct A<int[1]>; 126 } 127 128 namespace PR21289 { 129 template<typename T> using X = int; 130 template<typename T, decltype(sizeof(0))> using Y = int; 131 template<typename ...Ts> struct S {}; 132 template<typename ...Ts> void f() { 133 // This is a dependent type. It is *not* S<int>, even though it canonically 134 // contains no template parameters. 135 using Type = S<X<Ts>...>; 136 Type s; 137 using Type = S<int, int, int>; 138 } 139 void g() { f<void, void, void>(); } 140 141 template<typename ...Ts> void h(S<int>) {} 142 // Pending a core issue, it's not clear if these are redeclarations, but they 143 // are probably intended to be... even though substitution can succeed for one 144 // of them but fail for the other! 145 template<typename ...Ts> void h(S<X<Ts>...>) {} // expected-note {{previous}} 146 template<typename ...Ts> void h(S<Y<Ts, sizeof(Ts)>...>) {} // expected-error {{redefinition}} 147 } 148
