1// RUN: %clang_cc1 -fsyntax-only -verify %s
2
3// C++03 [namespace.udecl]p11: (per DR101)
4//   If a function declaration in namespace scope or block scope has
5//   the same name and the same parameter types as a function
6//   introduced by a using-declaration, and the declarations do not declare the
7//   same function, the program is ill-formed. [Note: two using-declarations may
8//   introduce functions with the same name and the same parameter types. If,
9//   for a call to an unqualified function name, function overload resolution
10//   selects the functions introduced by such using-declarations, the function
11//   call is ill-formed.]
12//
13// FIXME: DR565 introduces parallel wording here for function templates.
14
15namespace test0 {
16  namespace ns { void foo(); } // expected-note {{target of using declaration}}
17  int foo(void); // expected-note {{conflicting declaration}}
18  using ns::foo; // expected-error {{target of using declaration conflicts with declaration already in scope}}
19}
20
21namespace test1 {
22  namespace ns { void foo(); } // expected-note {{target of using declaration}}
23  using ns::foo; //expected-note {{using declaration}}
24  int foo(void); // expected-error {{declaration conflicts with target of using declaration already in scope}}
25}
26
27namespace test2 {
28  namespace ns { void foo(); } // expected-note 2 {{target of using declaration}}
29  void test0() {
30    int foo(void); // expected-note {{conflicting declaration}}
31    using ns::foo; // expected-error {{target of using declaration conflicts with declaration already in scope}}
32  }
33
34  void test1() {
35    using ns::foo; //expected-note {{using declaration}}
36    int foo(void); // expected-error {{declaration conflicts with target of using declaration already in scope}}
37  }
38}
39
40namespace test3 {
41  namespace ns { void foo(); } // expected-note 2 {{target of using declaration}}
42  class Test0 {
43    void test() {
44      int foo(void); // expected-note {{conflicting declaration}}
45      using ns::foo; // expected-error {{target of using declaration conflicts with declaration already in scope}}
46    }
47  };
48
49  class Test1 {
50    void test() {
51      using ns::foo; //expected-note {{using declaration}}
52      int foo(void); // expected-error {{declaration conflicts with target of using declaration already in scope}}
53    }
54  };
55}
56
57namespace test4 {
58  namespace ns { void foo(); } // expected-note 2 {{target of using declaration}}
59  template <typename> class Test0 {
60    void test() {
61      int foo(void); // expected-note {{conflicting declaration}}
62      using ns::foo; // expected-error {{target of using declaration conflicts with declaration already in scope}}
63    }
64  };
65
66  template <typename> class Test1 {
67    void test() {
68      using ns::foo; //expected-note {{using declaration}}
69      int foo(void); // expected-error {{declaration conflicts with target of using declaration already in scope}}
70    }
71  };
72}
73
74// FIXME: we should be able to diagnose both of these, but we can't.
75namespace test5 {
76  namespace ns { void foo(int); }
77  template <typename T> class Test0 {
78    void test() {
79      int foo(T);
80      using ns::foo;
81    }
82  };
83
84  template <typename T> class Test1 {
85    void test() {
86      using ns::foo;
87      int foo(T);
88    }
89  };
90
91  template class Test0<int>;
92  template class Test1<int>;
93}
94
95namespace test6 {
96  namespace ns { void foo(); } // expected-note {{target of using declaration}}
97  using ns::foo; // expected-note {{using declaration}}
98  namespace ns {
99    using test6::foo;
100    void foo() {}
101  }
102  void foo(); // expected-error {{declaration conflicts with target of using declaration already in scope}}
103}
104
105namespace test7 {
106  void foo();
107  using test7::foo;
108  void foo() {}
109}
110