1// RUN: %clang_cc1 -fsyntax-only -verify %s
2extern "C" {
3  extern "C" void f(int);
4}
5
6extern "C++" {
7  extern "C++" int& g(int);
8  float& g();
9}
10double& g(double);
11
12void test(int x, double d) {
13  f(x);
14  float &f1 = g();
15  int& i1 = g(x);
16  double& d1 = g(d);
17}
18
19extern "C" int foo;
20extern "C" int foo;
21
22extern "C" const int bar;
23extern "C" int const bar;
24
25// <rdar://problem/6895431>
26extern "C" struct bar d;
27extern struct bar e;
28
29extern "C++" {
30  namespace N0 {
31    struct X0 {
32      int foo(int x) { return x; }
33    };
34  }
35}
36
37// PR5430
38namespace pr5430 {
39  extern "C" void func(void);
40}
41using namespace pr5430;
42extern "C" void pr5430::func(void) { }
43
44// PR5404
45int f2(char *)
46{
47        return 0;
48}
49
50extern "C"
51{
52    int f2(int)
53    {
54        return f2((char *)0);
55    }
56}
57
58// PR6991
59extern "C" typedef int (*PutcFunc_t)(int);
60
61
62// PR7859
63extern "C" void pr7859_a(int) {} // expected-note {{previous definition}}
64extern "C" void pr7859_a(int) {} // expected-error {{redefinition}}
65
66extern "C" void pr7859_b() {} // expected-note {{previous definition}}
67extern "C" void pr7859_b(int) {} // expected-error {{conflicting}}
68
69extern "C" void pr7859_c(short) {} // expected-note {{previous definition}}
70extern "C" void pr7859_c(int) {} // expected-error {{conflicting}}
71
72// <rdar://problem/8318976>
73extern "C" {
74  struct s0 {
75  private:
76    s0();
77    s0(const s0 &);
78  };
79}
80
81//PR7754
82extern "C++" template <class T> int pr7754(T param);
83
84namespace N {
85  int value;
86}
87
88extern "C++" using N::value;
89
90// PR7076
91extern "C" const char *Version_string = "2.9";
92
93namespace PR9162 {
94  extern "C" {
95    typedef struct _ArtsSink ArtsSink;
96    struct _ArtsSink {
97      int sink;
98    };
99  }
100  int arts_sink_get_type()
101  {
102    return sizeof(ArtsSink);
103  }
104}
105