93 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify %s2// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s3// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s4 5struct Outer {6 struct Inner {7 int intfield;8 };9};10 11struct Base {12 void base_member();13 14 typedef int Int;15 Int typedeffed_member();16};17 18struct Derived : public Base {19};20 21int myglobal;22 23void global_function();24extern "C" {25 void global_c_function();26}27 28class A {29 class AInner {30 };31 32 friend class PreDeclared;33 friend class Outer::Inner;34 friend int Outer::Inner::intfield; // expected-error {{friends can only be classes or functions}}35 friend int Outer::Inner::missing_field; //expected-error {{friends can only be classes or functions}}36 friend int myoperation(float); // okay37 friend int myglobal; // expected-error {{friends can only be classes or functions}}38 39 friend void global_function();40 friend void global_c_function();41 42 friend class UndeclaredSoFar;43 UndeclaredSoFar x; // expected-error {{unknown type name 'UndeclaredSoFar'}}44 45 void a_member();46 friend void A::a_member();47#if __cplusplus <= 199711L48 // expected-error@-2 {{friends cannot be members of the declaring class}}49#endif50 friend void a_member(); // okay (because we ignore class scopes when looking up friends)51 friend class A::AInner; // this is okay as an extension52 friend class AInner; // okay, refers to ::AInner53 54 friend void Derived::missing_member(); // expected-error {{friend declaration of 'missing_member' does not match any declaration in 'Derived'}}55 56 friend void Derived::base_member(); // expected-error {{friend declaration of 'base_member' does not match any declaration in 'Derived'}}57 58 friend int Base::typedeffed_member(); // okay: should look through typedef59 60 // These test that the friend is properly not being treated as a61 // member function.62 friend A operator|(const A& l, const A& r); // okay63 friend A operator|(const A& r); // expected-error {{overloaded 'operator|' must be a binary operator (has 1 parameter)}}64 65 friend operator bool() const; // expected-error {{must use a qualified name when declaring a conversion operator as a friend}} \66 // expected-error{{non-member function cannot have 'const' qualifier}}67 68 typedef void ftypedef();69 friend ftypedef typedeffed_function; // okay (because it's not declared as a member)70 71 class facet;72 friend class facet; // should not assert73 class facet {};74 75 friend int Unknown::thing(); // expected-error {{use of undeclared identifier}}76 friend int friendfunc(), Unknown::thing(); // expected-error {{use of undeclared identifier}}77 friend int friendfunc(), Unknown::thing() : 4; // expected-error {{use of undeclared identifier}}78};79 80A::UndeclaredSoFar y; // expected-error {{no type named 'UndeclaredSoFar' in 'A'}}81 82class PreDeclared;83 84int myoperation(float f) {85 return (int) f;86}87 88template <typename T>89class B {90 template <typename U>91 friend B<U>() {} // expected-error {{must use a qualified name when declaring a constructor as a friend}}92};93