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// RUN: clang-cc -fsyntax-only -verify -pedantic %s
@protocol NSObject
@end
@protocol DTOutputStreams <NSObject>
@end
@interface DTFilterOutputStream <DTOutputStreams>
- nextOutputStream;
@end
@implementation DTFilterOutputStream
- (id)initWithNextOutputStream:(id <DTOutputStreams>) outputStream {
id <DTOutputStreams> nextOutputStream = [self nextOutputStream];
self = nextOutputStream;
return nextOutputStream ? nextOutputStream : self;
}
- nextOutputStream {
return self;
}
@end
@interface DTFilterOutputStream2
- nextOutputStream;
@end
@implementation DTFilterOutputStream2 // expected-warning {{incomplete implementation}} expected-warning {{method definition for 'nextOutputStream' not found}}
- (id)initWithNextOutputStream:(id <DTOutputStreams>) outputStream {
id <DTOutputStreams> nextOutputStream = [self nextOutputStream];
// GCC warns about both of these.
self = nextOutputStream; // expected-warning {{incompatible type assigning 'id<DTOutputStreams>', expected 'DTFilterOutputStream2 *'}}
return nextOutputStream ? nextOutputStream : self;
}
@end
// No @interface declaration for DTFilterOutputStream3
@implementation DTFilterOutputStream3 // expected-warning {{cannot find interface declaration for 'DTFilterOutputStream3'}}
- (id)initWithNextOutputStream:(id <DTOutputStreams>) outputStream {
id <DTOutputStreams> nextOutputStream = [self nextOutputStream]; // expected-warning {{method '-nextOutputStream' not found (return type defaults to 'id')}}
// GCC warns about both of these as well (no errors).
self = nextOutputStream; // expected-warning {{incompatible type assigning 'id<DTOutputStreams>', expected 'DTFilterOutputStream3 *'}}
return nextOutputStream ? nextOutputStream : self;
}
@end
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