inject-templated-friend.cpp revision 65cf05d21ca22320deef11862f93f9a85ec62bb9 
1// RUN: %clang %s -S -emit-llvm -o - | grep -e "define linkonce_odr.*_ZlsR11std_ostreamRK8StreamerI3FooE"
2// RUN: %clang_cc1 %s -DREDEFINE -verify
3// PR8007: friend function not instantiated.
4
5struct std_ostream
6{
7  int dummy;
8};
9
10std_ostream cout;
11
12template <typename STRUCT_TYPE>
13struct Streamer
14{
15    friend std_ostream& operator << (std_ostream& o, const Streamer& f) // expected-error{{redefinition of 'operator<<'}}
16        {
17            Streamer s(f);
18            s(o);
19            return o;
20        }
21
22    Streamer(const STRUCT_TYPE& s) : s(s) {}
23
24    const STRUCT_TYPE& s;
25    void operator () (std_ostream&) const;
26};
27
28typedef struct Foo {} Foo;
29
30std_ostream& operator << (std_ostream&, const Streamer<Foo>&);
31#ifdef REDEFINE
32std_ostream& operator << (std_ostream& o, const Streamer<Foo>&) // expected-note{{is here}}
33{
34  // Sema should flag this as a redefinition
35  return o;
36}
37#endif
38
39template <>
40void Streamer<Foo>::operator () (std_ostream& o) const // expected-note{{requested here}}
41{
42}
43
44int main(void)
45{
46    Foo foo;
47    cout << foo;
48}
49