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/* Test assignments and comparisons between protocols (obscure case). */
/* Author: Nicola Pero <nicola@brainstorm.co.uk>. */
/* { dg-do compile } */
#include <objc/objc.h>
@protocol MyProtocolA
- (void) methodA;
@end
@protocol MyProtocolB
- (void) methodB;
@end
@protocol MyProtocolAB <MyProtocolA, MyProtocolB>
@end
@protocol MyProtocolAC <MyProtocolA>
- (void) methodC;
@end
int main()
{
id<MyProtocolA> obj_a = nil;
id<MyProtocolB> obj_b = nil;
id<MyProtocolAB> obj_ab = nil;
id<MyProtocolAC> obj_ac = nil;
obj_a = obj_b; /* { dg-warning "does not conform" } */
obj_a = obj_ab; /* Ok */
obj_a = obj_ac; /* Ok */
obj_b = obj_a; /* { dg-warning "does not conform" } */
obj_b = obj_ab; /* Ok */
obj_b = obj_ac; /* { dg-warning "does not conform" } */
obj_ab = obj_a; /* { dg-warning "does not conform" } */
obj_ab = obj_b; /* { dg-warning "does not conform" } */
obj_ab = obj_ac; /* { dg-warning "does not conform" } */
obj_ac = obj_a; /* { dg-warning "does not conform" } */
obj_ac = obj_b; /* { dg-warning "does not conform" } */
obj_ac = obj_ab; /* { dg-warning "does not conform" } */
if (obj_a == obj_b) ; /* { dg-warning "lacks a cast" } */
if (obj_b == obj_a) ; /* { dg-warning "lacks a cast" } */
if (obj_a == obj_ab) ; /* Ok */
if (obj_ab == obj_a) ; /* Ok */ /* Spurious 2.95.4 warning here */
if (obj_a == obj_ac) ; /* Ok */
if (obj_ac == obj_a) ; /* Ok */ /* Spurious 2.95.4 warning here */
if (obj_b == obj_ab) ; /* Ok */
if (obj_ab == obj_b) ; /* Ok */ /* Spurious 2.95.4 warning here */
if (obj_b == obj_ac) ; /* { dg-warning "lacks a cast" } */
if (obj_ac == obj_b) ; /* { dg-warning "lacks a cast" } */
if (obj_ab == obj_ac) ; /* { dg-warning "lacks a cast" } */
if (obj_ac == obj_ab) ; /* { dg-warning "lacks a cast" } */
return 0;
}
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