65 lines
2.6 KiB
Objective-C
65 lines
2.6 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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#define nil (void *)0;
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extern void foo();
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@protocol MyProtocolA
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- (void) methodA;
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@end
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@protocol MyProtocolB
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- (void) methodB;
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@end
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@protocol MyProtocolAB <MyProtocolA, MyProtocolB>
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@end
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@protocol MyProtocolAC <MyProtocolA>
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- (void) methodC;
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@end
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int main()
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{
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id<MyProtocolA> obj_a = nil;
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id<MyProtocolB> obj_b = nil;
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id<MyProtocolAB> obj_ab = nil;
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id<MyProtocolAC> obj_ac = nil;
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obj_a = obj_b; // expected-warning {{assigning to 'id<MyProtocolA>' from incompatible type 'id<MyProtocolB>'}}
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obj_a = obj_ab; /* Ok */
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obj_a = obj_ac; /* Ok */
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obj_b = obj_a; // expected-warning {{assigning to 'id<MyProtocolB>' from incompatible type 'id<MyProtocolA>'}}
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obj_b = obj_ab; /* Ok */
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obj_b = obj_ac; // expected-warning {{assigning to 'id<MyProtocolB>' from incompatible type 'id<MyProtocolAC>'}}
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obj_ab = obj_a; // expected-warning {{assigning to 'id<MyProtocolAB>' from incompatible type 'id<MyProtocolA>'}}
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obj_ab = obj_b; // expected-warning {{assigning to 'id<MyProtocolAB>' from incompatible type 'id<MyProtocolB>'}}
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obj_ab = obj_ac; // expected-warning {{assigning to 'id<MyProtocolAB>' from incompatible type 'id<MyProtocolAC>'}}
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obj_ac = obj_a; // expected-warning {{assigning to 'id<MyProtocolAC>' from incompatible type 'id<MyProtocolA>'}}
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obj_ac = obj_b; // expected-warning {{assigning to 'id<MyProtocolAC>' from incompatible type 'id<MyProtocolB>'}}
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obj_ac = obj_ab; // expected-warning {{assigning to 'id<MyProtocolAC>' from incompatible type 'id<MyProtocolAB>'}}
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if (obj_a == obj_b) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolA>' and 'id<MyProtocolB>')}}
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if (obj_b == obj_a) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolB>' and 'id<MyProtocolA>')}}
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if (obj_a == obj_ab) foo (); /* Ok */
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if (obj_ab == obj_a) foo (); /* Ok */
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if (obj_a == obj_ac) foo (); /* Ok */
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if (obj_ac == obj_a) foo (); /* Ok */
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if (obj_b == obj_ab) foo (); /* Ok */
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if (obj_ab == obj_b) foo (); /* Ok */
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if (obj_b == obj_ac) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolB>' and 'id<MyProtocolAC>')}}
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if (obj_ac == obj_b) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolAC>' and 'id<MyProtocolB>')}}
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if (obj_ab == obj_ac) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolAB>' and 'id<MyProtocolAC>')}}
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if (obj_ac == obj_ab) foo (); // expected-warning {{comparison of distinct pointer types ('id<MyProtocolAC>' and 'id<MyProtocolAB>')}}
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return 0;
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}
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