1 // RUN: %clang_cc1 -fsyntax-only %s -verify 2 3 // C++'0x [namespace.memdef] p3: 4 // Every name first declared in a namespace is a member of that namespace. If 5 // a friend declaration in a non-local class first declares a class or 6 // function the friend class or function is a member of the innermost 7 // enclosing namespace. 8 9 namespace N { 10 struct S0 { 11 friend struct F0; 12 friend void f0(int); 13 struct F0 member_func(); 14 }; 15 struct F0 { }; 16 F0 f0() { return S0().member_func(); } 17 } 18 N::F0 f0_var = N::f0(); 19 20 // Ensure we can handle attaching friend declarations to an enclosing namespace 21 // with multiple contexts. 22 namespace N { struct S1 { struct IS1; }; } 23 namespace N { 24 struct S1::IS1 { 25 friend struct F1; 26 friend void f1(int); 27 struct F1 member_func(); 28 }; 29 struct F1 { }; 30 F1 f1() { return S1::IS1().member_func(); } 31 } 32 N::F1 f1_var = N::f1(); 33 34 // The name of the friend is not found by unqualified lookup (3.4.1) or by 35 // qualified lookup (3.4.3) until a matching declaration is provided in that 36 // namespace scope (either before or after the class definition granting 37 // friendship). If a friend function is called, its name may be found by the 38 // name lookup that considers functions from namespaces and classes 39 // associated with the types of the function arguments (3.4.2). If the name 40 // in a friend declaration is neither qualified nor a template-id and the 41 // declaration is a function or an elaborated-type-specifier, the lookup to 42 // determine whether the entity has been previously declared shall not 43 // consider any scopes outside the innermost enclosing namespace. 44 45 template<typename T> struct X0 { }; 46 struct X1 { }; 47 48 struct Y { 49 template<typename T> union X0; 50 template<typename T> friend union X0; 51 52 union X1; 53 friend union X1; 54 }; 55 56 namespace N { 57 namespace M { 58 template<typename T> class X; 59 } 60 } 61 62 namespace N3 { 63 class Y { 64 template<typename T> friend class N::M::X; 65 }; 66 } 67 68 // FIXME: Woefully inadequate for testing 69 70 // Friends declared as template-ids aren't subject to the restriction 71 // on innermost namespaces. 72 // rdar://problem/8552377 73 namespace test5 { 74 template <class T> void f(T); 75 namespace ns { 76 class A { 77 friend void f<int>(int); 78 static void foo(); // expected-note 2 {{declared private here}} 79 }; 80 81 // Note that this happens without instantiation. 82 template <class T> void f(T) { 83 A::foo(); // expected-error {{'foo' is a private member of 'test5::ns::A'}} 84 } 85 } 86 87 template <class T> void f(T) { 88 ns::A::foo(); // expected-error {{'foo' is a private member of 'test5::ns::A'}} 89 } 90 91 template void f<int>(int); 92 template void f<long>(long); //expected-note {{instantiation}} 93 } 94
