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