223 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s3struct X0 {4 X0();5 X0(int);6 X0 f1();7 X0 f2();8 typedef int A;9 typedef X0 B;10};11 12template<typename T>13struct 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.26template<typename T> X1<T>::X1<T>(int) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}}27template<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 types30X0::X0 X0::f1() { return X0(); } // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}}31 32struct X0::X0 X0::f2() { return X0(); }33 34template<typename T> X1<T>::X1<T> X1<T>::f2() { } // expected-warning{{missing 'typename'}}35template<typename T> X1<T>::X1<T> (X1<T>::f2)(int) { } // expected-warning{{missing 'typename'}}36template<typename T> struct X1<T>::X1<T> (X1<T>::f2)(float) { }37template<typename T> struct X1<T>::X1 (X1<T>::f2)(double) { }38template<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}}39template<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 41void x1test(X1<int> x1i) {42 x1i.f2();43 x1i.f2(0);44 x1i.f2(0.f);45 x1i.f2(0.);46}47 48void 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 80template<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}85template void in_instantiation_x0<X0>(); // expected-note {{instantiation of}}86 87template<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}92template void in_instantiation_x1<X1<int> >(); // expected-note {{instantiation of}}93 94namespace 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 100namespace 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 are115// member-declarations: foo::bar::baz::baz always names baz's constructor116// in such a context, even if looking up 'baz' within foo::bar::baz would117// not find the injected-class-name. Likewise foo::bar::baz<T>::baz also118// names the constructor.119namespace 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 an128 // inheriting constructor declaration in C++11.129 using InhCtor::T::T;130 };131#if __cplusplus < 201103L132 B b(123); // expected-error {{no matching constructor}}133 // expected-note@-7 2{{candidate constructor}}134 int n = b.T(); // ok, accessible135#else136 B b(123); // ok, inheriting constructor137 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 be141 // ill-formed.142 template<typename T>143 struct S : T {144 struct U; // expected-note 6{{candidate}}145 using T::T;146 };147 148 template<typename T>149 struct S<T>::U : S {150 using S::S;151 };152 153 S<A>::U ua(0); // expected-error {{no match}}154 S<B>::U ub(0); // expected-error {{no match}}155 156 template<typename T>157 struct X : T {158 using T::Z::U::U;159 };160 template<typename T>161 struct X2 : T {162 using T::Z::template V<int>::V;163 };164 struct Y {165 struct Z {166 typedef Y U;167 template<typename T> using V = Y;168 };169 Y(int);170 };171 X<Y> xy(0);172 173 namespace Repeat {174 struct A {175 struct T {176 T(int);177 };178 };179 struct Z : A {180 using A::A::A;181 };182 template<typename T>183 struct ZT : T::T {184 using T::T::T;185 };186 }187 188 namespace NS {189 struct NS {};190 }191 struct DerivedFromNS : NS::NS {192 // No special case unless the NNS names a class.193 using InhCtor::NS::NS; // expected-error {{using declaration in class refers into 'InhCtor::NS', which is not a class}}194 195 };196 197 // FIXME: Consider reusing the same diagnostic between dependent and non-dependent contexts198 typedef int I;199 struct UsingInt {200 using I::I; // expected-error {{'I' (aka 'int') is not a class, namespace, or enumeration}}201 };202 template<typename T> struct UsingIntTemplate {203 using T::T; // expected-error {{type 'int' cannot be used prior to '::' because it has no members}}204 };205 UsingIntTemplate<int> uit; // expected-note {{here}}206 207 // This case is odd: we don't name the constructor of a dependent base as208 // Base::Base, but we still happen to have enough information to identify209 // when parsing the template that we're inheriting constructors.210 //211 // FIXME: Once CWG 2070 is resolved, check whether this case should be212 // accepted or not.213 namespace DependentCtorName {214 template <typename T> struct B { B(int); };215 template <typename T> struct A : B<T> {216 using X = B<T>;217 using X::B;218 };219 A<int> ab = 0;220 }221#endif222}223