1// RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
2
3#define nil (void *)0;
4
5extern void foo();
6
7@protocol MyProtocol
8- (void) method;
9@end
10
11@interface MyClass
12@end
13
14@interface MyClass (Addition) <MyProtocol>
15- (void) method;
16@end
17
18@interface MyOtherClass : MyClass
19@end
20
21int main()
22{
23  id <MyProtocol> obj_id_p = nil;
24  MyClass *obj_c_cat_p = nil;
25  MyOtherClass *obj_c_super_p = nil;
26  MyOtherClass<MyProtocol> *obj_c_super_p_q = nil;
27  MyClass<MyProtocol> *obj_c_cat_p_q = nil;
28
29  obj_c_cat_p = obj_id_p;
30  obj_c_super_p = obj_id_p;
31  obj_id_p = obj_c_cat_p;  /* Ok */
32  obj_id_p = obj_c_super_p; /* Ok */
33
34  if (obj_c_cat_p == obj_id_p) foo(); /* Ok */
35  if (obj_c_super_p == obj_id_p) foo() ; /* Ok */
36  if (obj_id_p == obj_c_cat_p)  foo(); /* Ok */
37  if (obj_id_p == obj_c_super_p)  foo(); /* Ok */
38
39  obj_c_cat_p = obj_c_super_p; // ok.
40  obj_c_cat_p = obj_c_super_p_q; // ok.
41  obj_c_super_p = obj_c_cat_p_q; // expected-warning {{incompatible pointer types}}
42  obj_c_cat_p_q = obj_c_super_p;
43  return 0;
44}
45