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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 f1();
5   X0 f2();
6 };
7 
8 template<typename T>
9 struct X1 {
10   X1<T>(int);
11   (X1<T>)(float);
12   X1 f2();
13   X1 f2(int);
14   X1 f2(float);
15 };
16 
17 // Error recovery: out-of-line constructors whose names have template arguments.
X1(int)18 template<typename T> X1<T>::X1<T>(int) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}}
19 template<typename T> (X1<T>::X1<T>)(float) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}}
20 
21 // Error recovery: out-of-line constructor names intended to be types
f1()22 X0::X0 X0::f1() { return X0(); } // expected-error{{qualified reference to 'X0' is a constructor name rather than a type wherever a constructor can be declared}}
23 
f2()24 struct X0::X0 X0::f2() { return X0(); }
25 
f2()26 template<typename T> X1<T>::X1<T> X1<T>::f2() { } // expected-error{{qualified reference to 'X1' is a constructor name rather than a template name wherever a constructor can be declared}}
X1(X1<T>::f2)27 template<typename T> X1<T>::X1<T> (X1<T>::f2)(int) { } // expected-error{{qualified reference to 'X1' is a constructor name rather than a template name wherever a constructor can be declared}}
X1(X1<T>::f2)28 template<typename T> struct X1<T>::X1<T> (X1<T>::f2)(float) { }
29 
30 // We have a special case for lookup within using-declarations that are
31 // member-declarations: foo::bar::baz::baz always names baz's constructor
32 // in such a context, even if looking up 'baz' within foo::bar::baz would
33 // not find the injected-class-name. Likewise foo::bar::baz<T>::baz also
34 // names the constructor.
35 namespace InhCtor {
36   struct A {
37     A(int);
38   protected:
39     int T();
40   };
41   typedef A T;
42   struct B : A {
43     // This is a using-declaration for 'int A::T()' in C++98, but is an
44     // inheriting constructor declaration in C++11.
45     using InhCtor::T::T;
46   };
47 #if __cplusplus < 201103L
48   B b(123);      // expected-error {{no matching constructor}}
49                  // expected-note@-7 2{{candidate constructor}}
50   int n = b.T(); // ok, accessible
51 #else
52   B b(123);      // ok, inheriting constructor
53   int n = b.T(); // expected-error {{'T' is a protected member of 'InhCtor::A'}}
54                  // expected-note@-15 {{declared protected here}}
55 
56   // FIXME: EDG and GCC reject this too, but it's not clear why it would be
57   // ill-formed.
58   template<typename T>
59   struct S : T {
60     struct U : S { // expected-note 6{{candidate}}
61       using S::S;
62     };
63     using T::T;
64   };
65   S<A>::U ua(0); // expected-error {{no match}}
66   S<B>::U ub(0); // expected-error {{no match}}
67 
68   template<typename T>
69   struct X : T {
70     using T::Z::U::U;
71   };
72   template<typename T>
73   struct X2 : T {
74     using T::Z::template V<int>::V;
75   };
76   struct Y {
77     struct Z {
78       typedef Y U;
79       template<typename T> using V = Y;
80     };
81     Y(int);
82   };
83   X<Y> xy(0);
84 
85   namespace Repeat {
86     struct A {
87       struct T {
88         T(int);
89       };
90     };
91     struct Z : A {
92       using A::A::A;
93     };
94     template<typename T>
95     struct ZT : T::T {
96       using T::T::T;
97     };
98   }
99 
100   namespace NS {
101     struct NS {};
102   }
103   struct DerivedFromNS : NS::NS {
104     // No special case unless the NNS names a class.
105     using InhCtor::NS::NS; // expected-error {{using declaration in class refers into 'InhCtor::NS::', which is not a class}}
106 
107   };
108 
109   // FIXME: Consider reusing the same diagnostic between dependent and non-dependent contexts
110   typedef int I;
111   struct UsingInt {
112     using I::I; // expected-error {{'I' (aka 'int') is not a class, namespace, or enumeration}}
113   };
114   template<typename T> struct UsingIntTemplate {
115     using T::T; // expected-error {{type 'int' cannot be used prior to '::' because it has no members}}
116   };
117   UsingIntTemplate<int> uit; // expected-note {{here}}
118 #endif
119 }
120