p2.cpp revision 2db075b1d3b16f0100fe06408dfb4ab7d50700a4 
1// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
3struct X0 {
4  X0 f1();
5  X0 f2();
6};
7
8template<typename T>
9struct 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.
18template<typename T> X1<T>::X1<T>(int) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}}
19template<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
22X0::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
24struct X0::X0 X0::f2() { return X0(); }
25
26template<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}}
27template<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}}
28template<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.
35namespace 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  template<typename T>
57  struct S : T {
58    struct U : S {
59      using S::S;
60    };
61    using T::T;
62  };
63
64  S<A>::U ua(0);
65  S<B>::U ub(0);
66
67  template<typename T>
68  struct X : T {
69    using T::Z::U::U;
70  };
71  template<typename T>
72  struct X2 : T {
73    using T::Z::template V<int>::V;
74  };
75  struct Y {
76    struct Z {
77      typedef Y U;
78      template<typename T> using V = Y;
79    };
80    Y(int);
81  };
82  X<Y> xy(0);
83
84  namespace Repeat {
85    struct A {
86      struct T {
87        T(int);
88      };
89    };
90    struct Z : A {
91      // FIXME: Core wording says this is invalid, but we and g++ accept.
92      using A::A::A;
93    };
94    template<typename T>
95    struct ZT : T::T {
96      // FIXME: Core wording says this is invalid, but we and g++ accept.
97      using T::T::T;
98    };
99  }
100
101  namespace NS {
102    struct NS {};
103  }
104  struct DerivedFromNS : NS::NS {
105    // No special case unless the NNS names a class.
106    using InhCtor::NS::NS; // expected-error {{using declaration in class refers into 'InhCtor::NS::', which is not a class}}
107
108  };
109
110  typedef int I;
111  struct UsingInt {
112    using I::I; // expected-error {{expected a class or namespace}}
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