1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 #define nil (void *)0; 4 5 extern void foo(); 6 7 @protocol MyProtocolA 8 - (void) methodA; 9 @end 10 11 @protocol MyProtocolB 12 - (void) methodB; 13 @end 14 15 @protocol MyProtocolAB <MyProtocolA, MyProtocolB> 16 @end 17 18 @protocol MyProtocolAC <MyProtocolA> 19 - (void) methodC; 20 @end 21 22 int main() 23 { 24 id<MyProtocolA> obj_a = nil; 25 id<MyProtocolB> obj_b = nil; 26 id<MyProtocolAB> obj_ab = nil; 27 id<MyProtocolAC> obj_ac = nil; 28 29 obj_a = obj_b; // expected-warning {{assigning to 'id<MyProtocolA>' from incompatible type 'id<MyProtocolB>'}} 30 obj_a = obj_ab; /* Ok */ 31 obj_a = obj_ac; /* Ok */ 32 33 obj_b = obj_a; // expected-warning {{assigning to 'id<MyProtocolB>' from incompatible type 'id<MyProtocolA>'}} 34 obj_b = obj_ab; /* Ok */ 35 obj_b = obj_ac; // expected-warning {{assigning to 'id<MyProtocolB>' from incompatible type 'id<MyProtocolAC>'}} 36 37 obj_ab = obj_a; // expected-warning {{assigning to 'id<MyProtocolAB>' from incompatible type 'id<MyProtocolA>'}} 38 obj_ab = obj_b; // expected-warning {{assigning to 'id<MyProtocolAB>' from incompatible type 'id<MyProtocolB>'}} 39 obj_ab = obj_ac; // expected-warning {{assigning to 'id<MyProtocolAB>' from incompatible type 'id<MyProtocolAC>'}} 40 41 obj_ac = obj_a; // expected-warning {{assigning to 'id<MyProtocolAC>' from incompatible type 'id<MyProtocolA>'}} 42 obj_ac = obj_b; // expected-warning {{assigning to 'id<MyProtocolAC>' from incompatible type 'id<MyProtocolB>'}} 43 obj_ac = obj_ab; // expected-warning {{assigning to 'id<MyProtocolAC>' from incompatible type 'id<MyProtocolAB>'}} 44 45 if (obj_a == obj_b) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolA>' and 'id<MyProtocolB>')}} 46 if (obj_b == obj_a) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolB>' and 'id<MyProtocolA>')}} 47 48 if (obj_a == obj_ab) foo (); /* Ok */ 49 if (obj_ab == obj_a) foo (); /* Ok */ 50 51 if (obj_a == obj_ac) foo (); /* Ok */ 52 if (obj_ac == obj_a) foo (); /* Ok */ 53 54 if (obj_b == obj_ab) foo (); /* Ok */ 55 if (obj_ab == obj_b) foo (); /* Ok */ 56 57 if (obj_b == obj_ac) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolB>' and 'id<MyProtocolAC>')}} 58 if (obj_ac == obj_b) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolAC>' and 'id<MyProtocolB>')}} 59 60 if (obj_ab == obj_ac) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolAB>' and 'id<MyProtocolAC>')}} 61 if (obj_ac == obj_ab) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolAC>' and 'id<MyProtocolAB>')}} 62 63 return 0; 64 } 65
