test/SemaTemplate/inject-templated-friend-post.cpp

   1 // RUN: %clang %s -S -emit-llvm -o - | grep -e "define linkonce_odr.*_ZlsR11std_ostreamRK8StreamerI3FooE"
   2 // RUN: %clang %s -S -emit-llvm -o - -DPROTOTYPE | grep -e "define linkonce_odr.*_ZlsR11std_ostreamRK8StreamerI3FooE"
   3 // RUN: %clang %s -S -emit-llvm -o - -DINSTANTIATE | grep -e "define linkonce_odr.*_ZlsR11std_ostreamRK8StreamerI3FooE"
   4 // RUN: %clang %s -S -emit-llvm -o - -DPROTOTYPE -DINSTANTIATE | grep -e "define linkonce_odr.*_ZlsR11std_ostreamRK8StreamerI3FooE"
   5 // RUN: %clang_cc1 %s -DREDEFINE -verify
   6 // RUN: %clang_cc1 %s -DPROTOTYPE -DREDEFINE -verify
   7 // PR8007: friend function not instantiated, reordered version.
   8 // Corresponds to http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38392
   9
  10 struct std_ostream
  11 {
  12   int dummy;
  13 };
  14
  15 std_ostream cout;
  16
  17 template <typename STRUCT_TYPE>
  18 struct Streamer;
  19
  20 typedef struct Foo {} Foo;
  21
  22 std_ostream& operator << (std_ostream&, const Streamer<Foo>&);
  23
  24 void test(const Streamer<Foo>& foo)
  25 {
  26     cout << foo;
  27 }
  28
  29 template <typename STRUCT_TYPE>
  30 struct Streamer
  31 {
  32     friend std_ostream& operator << (std_ostream& o, const Streamer& f) // expected-error{{redefinition of 'operator<<'}}
  33         {
  34             Streamer s(f);
  35             s(o);
  36             return o;
  37         }
  38
  39     Streamer(const STRUCT_TYPE& s) : s(s) {}
  40
  41     const STRUCT_TYPE& s;
  42     void operator () (std_ostream&) const;
  43 };
  44
  45 #ifdef PROTOTYPE
  46 std_ostream& operator << (std_ostream&, const Streamer<Foo>&);
  47 #endif
  48
  49 #ifdef INSTANTIATE
  50 template struct Streamer<Foo>;
  51 #endif
  52
  53 #ifdef REDEFINE
  54 std_ostream& operator << (std_ostream& o, const Streamer<Foo>&) // expected-note{{is here}}
  55 {
  56   return o;
  57 }
  58 #endif
  59
  60 #ifndef INSTANTIATE
  61 template <>
  62 void Streamer<Foo>::operator () (std_ostream& o) const // expected-note{{requested here}}
  63 {
  64 }
  65 #endif
  66
  67 int main(void)
  68 {
  69     Foo foo;
  70     test(foo);
  71 }
  72