1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 class A {}; // expected-note 3 {{previous use is here}} 4 5 void a1(struct A); 6 void a2(class A); 7 void a3(union A); // expected-error {{use of 'A' with tag type that does not match previous declaration}} 8 void a4(enum A); // expected-error {{use of 'A' with tag type that does not match previous declaration}} 9 10 class A1 { 11 friend struct A; 12 friend class A; 13 friend union A; // expected-error {{use of 'A' with tag type that does not match previous declaration}} 14 15 friend enum A; // expected-error {{ISO C++ forbids forward references to 'enum' types}} \ 16 // expected-warning {{cannot be a friend}} 17 }; 18 19 template <class T> struct B { // expected-note {{previous use is here}} 20 class Member {}; // expected-note 2 {{previous use is here}} 21 }; 22 23 template <> class B<int> { 24 // no type Member 25 }; 26 27 template <> struct B<A> { 28 union Member { // expected-note 4 {{previous use is here}} 29 void* a; 30 }; 31 }; 32 33 void b1(struct B<float>); 34 void b2(class B<float>); 35 void b3(union B<float>); // expected-error {{use of 'B<float>' with tag type that does not match previous declaration}} 36 //void b4(enum B<float>); // this just doesn't parse; you can't template an enum directly 37 38 void c1(struct B<float>::Member); 39 void c2(class B<float>::Member); 40 void c3(union B<float>::Member); // expected-error {{use of 'Member' with tag type that does not match previous declaration}} 41 void c4(enum B<float>::Member); // expected-error {{use of 'Member' with tag type that does not match previous declaration}} 42 43 void d1(struct B<int>::Member); // expected-error {{no struct named 'Member' in 'B<int>'}} 44 void d2(class B<int>::Member); // expected-error {{no class named 'Member' in 'B<int>'}} 45 void d3(union B<int>::Member); // expected-error {{no union named 'Member' in 'B<int>'}} 46 void d4(enum B<int>::Member); // expected-error {{no enum named 'Member' in 'B<int>'}} 47 48 void e1(struct B<A>::Member); // expected-error {{use of 'Member' with tag type that does not match previous declaration}} 49 void e2(class B<A>::Member); // expected-error {{use of 'Member' with tag type that does not match previous declaration}} 50 void e3(union B<A>::Member); 51 void e4(enum B<A>::Member); // expected-error {{use of 'Member' with tag type that does not match previous declaration}} 52 53 template <class T> struct C { 54 void foo(class B<T>::Member); // expected-error{{no class named 'Member' in 'B<int>'}} \ 55 // expected-error{{use of 'Member' with tag type that does not match previous declaration}} 56 }; 57 58 C<float> f1; 59 C<int> f2; // expected-note {{in instantiation of template class}} 60 C<A> f3; // expected-note {{in instantiation of template class}} 61
