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

   1 // RUN: %clang_cc1 %s -std=c++98 -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %s
   2 // RUN: %clang_cc1 %s -std=c++98 -triple %itanium_abi_triple -emit-llvm -o - -DPROTOTYPE | FileCheck --check-prefix=CHECK-PROTOTYPE %s
   3 // RUN: %clang_cc1 %s -std=c++98 -triple %itanium_abi_triple -emit-llvm -o - -DINSTANTIATE | FileCheck --check-prefix=CHECK-INSTANTIATE %s
   4 // RUN: %clang_cc1 %s -std=c++98 -triple %itanium_abi_triple -emit-llvm -o - -DPROTOTYPE -DINSTANTIATE | FileCheck --check-prefix=CHECK-PROTOTYPE-INSTANTIATE %s
   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 // CHECK: define linkonce_odr{{.*}}_ZlsR11std_ostreamRK8StreamerI3FooE
  11 // CHECK-PROTOTYPE: define linkonce_odr{{.*}}_ZlsR11std_ostreamRK8StreamerI3FooE
  12 // CHECK-INSTANTIATE: define linkonce_odr{{.*}}_ZlsR11std_ostreamRK8StreamerI3FooE
  13 // CHECK-PROTOTYPE-INSTANTIATE: define linkonce_odr{{.*}}_ZlsR11std_ostreamRK8StreamerI3FooE
  14
  15 struct std_ostream
  16 {
  17   int dummy;
  18 };
  19
  20 std_ostream cout;
  21
  22 template <typename STRUCT_TYPE>
  23 struct Streamer;
  24
  25 typedef struct Foo {} Foo;
  26
  27 inline std_ostream& operator << (std_ostream&, const Streamer<Foo>&);
  28
  29 void test(const Streamer<Foo>& foo)
  30 {
  31     cout << foo;
  32 }
  33
  34 template <typename STRUCT_TYPE>
  35 struct Streamer
  36 {
  37     friend std_ostream& operator << (std_ostream& o, const Streamer& f) // expected-error{{redefinition of 'operator<<'}}
  38         {
  39             Streamer s(f);
  40             s(o);
  41             return o;
  42         }
  43
  44     Streamer(const STRUCT_TYPE& s) : s(s) {}
  45
  46     const STRUCT_TYPE& s;
  47     void operator () (std_ostream&) const;
  48 };
  49
  50 #ifdef PROTOTYPE
  51 std_ostream& operator << (std_ostream&, const Streamer<Foo>&);
  52 #endif
  53
  54 #ifdef INSTANTIATE
  55 template struct Streamer<Foo>;
  56 #endif
  57
  58 #ifdef REDEFINE
  59 std_ostream& operator << (std_ostream& o, const Streamer<Foo>&) // expected-note{{is here}}
  60 {
  61   return o;
  62 }
  63 #endif
  64
  65 #ifndef INSTANTIATE
  66 template <>
  67 void Streamer<Foo>::operator () (std_ostream& o) const // expected-note{{requested here}}
  68 {
  69 }
  70 #endif
  71
  72 int main(void)
  73 {
  74     Foo foo;
  75     test(foo);
  76 }
  77