typename-specifier.cpp revision 651f13cea278ec967336033dd032faef0e9fc2ec 
1// RUN: %clang_cc1 -fsyntax-only -verify %s
2namespace N {
3  struct A {
4    typedef int type;
5  };
6
7  struct B {
8  };
9
10  struct C {
11    struct type { };
12    int type; // expected-note 2{{referenced member 'type' is declared here}}
13  };
14}
15
16int i;
17
18typename N::A::type *ip1 = &i; // expected-warning{{'typename' occurs outside of a template}}
19typename N::B::type *ip2 = &i; // expected-error{{no type named 'type' in 'N::B'}} \
20// expected-warning{{'typename' occurs outside of a template}}
21typename N::C::type *ip3 = &i; // expected-error{{typename specifier refers to non-type member 'type'}} \
22// expected-warning{{'typename' occurs outside of a template}}
23
24void test(double d) {
25  typename N::A::type f(typename N::A::type(a)); // expected-warning{{disambiguated as a function declaration}} \
26  // expected-note{{add a pair of parentheses}} expected-warning 2{{'typename' occurs outside of a template}}
27  int five = f(5);
28
29  using namespace N;
30  for (typename A::type i = 0; i < 10; ++i) // expected-warning{{'typename' occurs outside of a template}}
31    five += 1;
32
33  const typename N::A::type f2(d); // expected-warning{{'typename' occurs outside of a template}}
34}
35
36namespace N {
37  template<typename T>
38  struct X {
39    typedef typename T::type type; // expected-error {{no type named 'type' in 'N::B'}} \
40    // expected-error {{no type named 'type' in 'B'}} \
41    // FIXME: location info for error above isn't very good \
42    // expected-error 2{{typename specifier refers to non-type member 'type'}} \
43    // expected-error{{type 'int' cannot be used prior to '::' because it has no members}}
44  };
45}
46
47N::X<N::A>::type *ip4 = &i;
48N::X<N::B>::type *ip5 = &i; // expected-note{{in instantiation of template class 'N::X<N::B>' requested here}}
49N::X<N::C>::type *ip6 = &i; // expected-note{{in instantiation of template class 'N::X<N::C>' requested here}}
50
51N::X<int>::type fail1; // expected-note{{in instantiation of template class 'N::X<int>' requested here}}
52
53template<typename T>
54struct Y {
55  typedef typename N::X<T>::type *type; // expected-note{{in instantiation of template class 'N::X<B>' requested here}} \
56  // expected-note{{in instantiation of template class 'N::X<C>' requested here}}
57};
58
59struct A {
60  typedef int type;
61};
62
63struct B {
64};
65
66struct C {
67  struct type { };
68  int type; // expected-note{{referenced member 'type' is declared here}}
69};
70
71::Y<A>::type ip7 = &i;
72::Y<B>::type ip8 = &i; // expected-note{{in instantiation of template class 'Y<B>' requested here}}
73::Y<C>::type ip9 = &i; // expected-note{{in instantiation of template class 'Y<C>' requested here}}
74
75template<typename T> struct D {
76  typedef typename T::foo foo;  // expected-error {{type 'long' cannot be used prior to '::' because it has no members}}
77  typedef typename foo::bar bar;
78};
79
80D<long> struct_D;  // expected-note {{in instantiation of template class 'D<long>' requested here}}
81
82template<typename T> struct E {
83  typedef typename T::foo foo;
84  typedef typename foo::bar bar;  // expected-error {{type 'foo' (aka 'double') cannot be used prior to '::' because it has no members}}
85};
86
87struct F {
88  typedef double foo;
89};
90
91E<F> struct_E; // expected-note {{in instantiation of template class 'E<F>' requested here}}
92
93template<typename T> struct G {
94  typedef typename T::foo foo;
95  typedef typename foo::bar bar;
96};
97
98struct H {
99  struct foo {
100    typedef double bar;
101  };
102};
103
104G<H> struct_G;
105
106namespace PR10925 {
107  template< int mydim, typename Traits >
108  class BasicGeometry
109  {
110    typedef int some_type_t;
111  };
112
113  template<class ctype, int mydim, int coorddim>
114  class MockGeometry : BasicGeometry<mydim, int>{
115    using typename BasicGeometry<mydim, int>::operator[]; // expected-error {{typename is allowed for identifiers only}}
116  };
117}
118
119
120namespace missing_typename {
121template <class T1, class T2> struct pair {}; // expected-note 7 {{template parameter is declared here}}
122
123template <class T1, class T2>
124struct map {
125  typedef T1* iterator;
126};
127
128template <class T>
129class ExampleClass1 {
130  struct ExampleItem;
131
132
133  struct ExampleItemSet {
134    typedef ExampleItem* iterator;
135    ExampleItem* operator[](unsigned);
136  };
137
138  void foo() {
139    pair<ExampleItemSet::iterator, int> i; // expected-error {{template argument for template type parameter must be a type; did you forget 'typename'?}}
140    pair<this->ExampleItemSet::iterator, int> i; // expected-error-re {{template argument for template type parameter must be a type{{$}}}}
141    pair<ExampleItemSet::operator[], int> i; // expected-error-re {{template argument for template type parameter must be a type{{$}}}}
142  }
143  pair<ExampleItemSet::iterator, int> elt; // expected-error {{template argument for template type parameter must be a type; did you forget 'typename'?}}
144
145
146  typedef map<int, ExampleItem*> ExampleItemMap;
147
148  static void bar() {
149    pair<ExampleItemMap::iterator, int> i; // expected-error {{template argument for template type parameter must be a type; did you forget 'typename'?}}
150  }
151  pair<ExampleItemMap::iterator, int> entry; // expected-error {{template argument for template type parameter must be a type; did you forget 'typename'?}}
152  pair<bar, int> foobar; // expected-error {{template argument for template type parameter must be a type}}
153};
154} // namespace missing_typename
155