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