test/SemaCXX/friend.cpp

// RUN: clang-cc -fsyntax-only -verify %s

friend class A; // expected-error {{'friend' used outside of class}}
void f() { friend class A; } // expected-error {{'friend' used outside of class}}
class C { friend class A; };
class D { void f() { friend class A; } }; // expected-error {{'friend' used outside of class}}