1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s 2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s 3 struct X0 { 4 X0(); 5 X0(int); 6 X0 f1(); 7 X0 f2(); 8 typedef int A; 9 typedef X0 B; 10 }; 11 12 template<typename T> 13 struct X1 : X0 { 14 X1(); 15 X1<T>(int); 16 (X1<T>)(float); 17 X1 f2(); 18 X1 f2(int); 19 X1 f2(float); 20 X1 f2(double); 21 X1 f2(short); 22 X1 f2(long); 23 }; 24 25 // Error recovery: out-of-line constructors whose names have template arguments. 26 template<typename T> X1<T>::X1<T>(int) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}} 27 template<typename T> (X1<T>::X1<T>)(float) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}} 28 29 // Error recovery: out-of-line constructor names intended to be types 30 X0::X0 X0::f1() { return X0(); } // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} 31 32 struct X0::X0 X0::f2() { return X0(); } 33 34 template<typename T> X1<T>::X1<T> X1<T>::f2() { } // expected-error{{missing 'typename'}} 35 template<typename T> X1<T>::X1<T> (X1<T>::f2)(int) { } // expected-error{{missing 'typename'}} 36 template<typename T> struct X1<T>::X1<T> (X1<T>::f2)(float) { } 37 template<typename T> struct X1<T>::X1 (X1<T>::f2)(double) { } 38 template<typename T> typename X1<T>::template X1<T> X1<T>::f2(short) { } // expected-warning {{qualified reference to 'X1' is a constructor name rather than a template name in this context}} 39 template<typename T> typename X1<T>::template X1<T> (X1<T>::f2)(long) { } // expected-warning {{qualified reference to 'X1' is a constructor name rather than a template name in this context}} 40 41 void x1test(X1<int> x1i) { 42 x1i.f2(); 43 x1i.f2(0); 44 x1i.f2(0.f); 45 x1i.f2(0.); 46 } 47 48 void other_contexts() { 49 X0::X0 x0; // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} 50 X1<int>::X1 x1a; // expected-error{{qualified reference to 'X1' is a constructor name rather than a type in this context}} 51 X1<int>::X1<float> x1b; // expected-error{{qualified reference to 'X1' is a constructor name rather than a template name in this context}} 52 53 X0::B ok1; 54 X0::X0::A ok2; 55 X0::X0::X0 x0b; // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} 56 X1<int>::X0 ok3; 57 X1<int>::X0::X0 x0c; // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} 58 X1<int>::X1<float>::X0 ok4; 59 60 { 61 typename X0::X0 tn1; // expected-warning{{qualified reference to 'X0' is a constructor name rather than a type in this context}} expected-warning 0-1{{typename}} 62 typename X1<int>::X1<float> tn2; // expected-warning{{qualified reference to 'X1' is a constructor name rather than a template name in this context}} expected-warning 0-1{{typename}} 63 typename X0::B ok1; // expected-warning 0-1{{typename}} 64 typename X1<int>::X0 ok2; // expected-warning 0-1{{typename}} 65 } 66 67 { 68 struct X0::X0 tag1; 69 struct X1<int>::X1 tag2; 70 struct X1<int>::X1<int> tag3; 71 } 72 73 int a; 74 { 75 X0::X0(a); // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} 76 // expected-warning@-1 {{redundant parentheses around declaration of variable named 'a'}} expected-note@-1 2{{}} 77 } 78 } 79 80 template<typename T> void in_instantiation_x0() { 81 typename T::X0 x0; // expected-warning{{qualified reference to 'X0' is a constructor name rather than a type in this context}} 82 typename T::A a; 83 typename T::B b; 84 } 85 template void in_instantiation_x0<X0>(); // expected-note {{instantiation of}} 86 87 template<typename T> void in_instantiation_x1() { 88 typename T::X1 x1; // expected-warning{{qualified reference to 'X1' is a constructor name rather than a type in this context}} 89 typename T::template X1<int> x1i; // expected-warning{{qualified reference to 'X1' is a constructor name rather than a template name in this context}} 90 typename T::X0 x0; 91 } 92 template void in_instantiation_x1<X1<int> >(); // expected-note {{instantiation of}} 93 94 namespace sfinae { 95 template<typename T> void f(typename T::X0 *) = delete; // expected-warning 0-1{{extension}} 96 template<typename T> void f(...); 97 void g() { f<X0>(0); } 98 } 99 100 namespace versus_injected_class_name { 101 template <typename T> struct A : T::B { 102 struct T::B *p; 103 typename T::B::type a; 104 A() : T::B() {} 105 106 typename T::B b; // expected-warning {{qualified reference to 'B' is a constructor name rather than a type in this context}} 107 }; 108 struct B { 109 typedef int type; 110 }; 111 template struct A<B>; // expected-note {{in instantiation of}} 112 } 113 114 // We have a special case for lookup within using-declarations that are 115 // member-declarations: foo::bar::baz::baz always names baz's constructor 116 // in such a context, even if looking up 'baz' within foo::bar::baz would 117 // not find the injected-class-name. Likewise foo::bar::baz<T>::baz also 118 // names the constructor. 119 namespace InhCtor { 120 struct A { 121 A(int); 122 protected: 123 int T(); 124 }; 125 typedef A T; 126 struct B : A { 127 // This is a using-declaration for 'int A::T()' in C++98, but is an 128 // inheriting constructor declaration in C++11. 129 using InhCtor::T::T; 130 }; 131 #if __cplusplus < 201103L 132 B b(123); // expected-error {{no matching constructor}} 133 // expected-note@-7 2{{candidate constructor}} 134 int n = b.T(); // ok, accessible 135 #else 136 B b(123); // ok, inheriting constructor 137 int n = b.T(); // expected-error {{'T' is a protected member of 'InhCtor::A'}} 138 // expected-note@-15 {{declared protected here}} 139 140 // FIXME: EDG and GCC reject this too, but it's not clear why it would be 141 // ill-formed. 142 template<typename T> 143 struct S : T { 144 struct U : S { // expected-note 6{{candidate}} 145 using S::S; 146 }; 147 using T::T; 148 }; 149 S<A>::U ua(0); // expected-error {{no match}} 150 S<B>::U ub(0); // expected-error {{no match}} 151 152 template<typename T> 153 struct X : T { 154 using T::Z::U::U; 155 }; 156 template<typename T> 157 struct X2 : T { 158 using T::Z::template V<int>::V; 159 }; 160 struct Y { 161 struct Z { 162 typedef Y U; 163 template<typename T> using V = Y; 164 }; 165 Y(int); 166 }; 167 X<Y> xy(0); 168 169 namespace Repeat { 170 struct A { 171 struct T { 172 T(int); 173 }; 174 }; 175 struct Z : A { 176 using A::A::A; 177 }; 178 template<typename T> 179 struct ZT : T::T { 180 using T::T::T; 181 }; 182 } 183 184 namespace NS { 185 struct NS {}; 186 } 187 struct DerivedFromNS : NS::NS { 188 // No special case unless the NNS names a class. 189 using InhCtor::NS::NS; // expected-error {{using declaration in class refers into 'InhCtor::NS::', which is not a class}} 190 191 }; 192 193 // FIXME: Consider reusing the same diagnostic between dependent and non-dependent contexts 194 typedef int I; 195 struct UsingInt { 196 using I::I; // expected-error {{'InhCtor::I' (aka 'int') is not a class, namespace, or enumeration}} 197 }; 198 template<typename T> struct UsingIntTemplate { 199 using T::T; // expected-error {{type 'int' cannot be used prior to '::' because it has no members}} 200 }; 201 UsingIntTemplate<int> uit; // expected-note {{here}} 202 203 // This case is odd: we don't name the constructor of a dependent base as 204 // Base::Base, but we still happen to have enough information to identify 205 // when parsing the template that we're inheriting constructors. 206 // 207 // FIXME: Once CWG 2070 is resolved, check whether this case should be 208 // accepted or not. 209 namespace DependentCtorName { 210 template <typename T> struct B { B(int); }; 211 template <typename T> struct A : B<T> { 212 using X = B<T>; 213 using X::B; 214 }; 215 A<int> ab = 0; 216 } 217 #endif 218 } 219