clang/test/Parser/cxx-friend.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
   4
   5 class C {
   6   friend class D;
   7 };
   8
   9 class A {
  10 public:
  11   void f();
  12 };
  13
  14 friend int x; // expected-error {{'friend' used outside of class}}
  15
  16 friend class D {}; // expected-error {{'friend' used outside of class}}
  17
  18 union U {
  19   int u1;
  20 };
  21
  22 class B {
  23   // 'A' here should refer to the declaration above.
  24   friend class A;
  25
  26   friend C;
  27 #if __cplusplus <= 199711L
  28   // expected-warning@-2 {{unelaborated friend declaration is a C++11 extension; specify 'class' to befriend 'C'}}
  29 #endif
  30
  31   friend U;
  32 #if __cplusplus <= 199711L
  33   // expected-warning@-2 {{unelaborated friend declaration is a C++11 extension; specify 'union' to befriend 'U'}}
  34 #endif
  35
  36   friend int;
  37 #if __cplusplus <= 199711L
  38   // expected-warning@-2 {{non-class friend type 'int' is a C++11 extension}}
  39 #endif
  40
  41   friend void myfunc();
  42
  43   void f(A *a) { a->f(); }
  44 };
  45
  46 inline void bar() {} // expected-note {{previous definition is here}}
  47 class E {
  48   friend void bar() {} // expected-error {{redefinition of 'bar'}}
  49 };
  50
  51
  52
  53
  54 template <typename t1, typename t2> class some_template;
  55 friend   // expected-error {{'friend' used outside of class}}
  56 some_template<foo, bar>&  // expected-error {{use of undeclared identifier 'foo'}}
  57   ;  // expected-error {{expected unqualified-id}}