66 lines
1.6 KiB
Objective-C
66 lines
1.6 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// rdar://8191774
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@protocol SomeProtocol
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@end
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@protocol SomeProtocol1
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@end
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@interface SomeObject <SomeProtocol>
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@end
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int main () {
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Class <SomeProtocol> classA;
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Class <SomeProtocol> classB;
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Class <SomeProtocol, SomeProtocol1> classC;
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Class <SomeProtocol1> classD;
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void * pv = 0;
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Class c = (Class)0;;
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if (pv)
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return classA == pv;
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if (c)
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return classA == c;
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return classA == classB || classA == classC ||
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classC == classA ||
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classA == classD; // expected-warning {{comparison of distinct pointer types ('Class<SomeProtocol>' and 'Class<SomeProtocol1>')}}
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}
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// rdar://18491222
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@protocol NSObject @end
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@interface NSObject @end
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@protocol ProtocolX <NSObject>
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@end
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@protocol ProtocolY <NSObject>
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@end
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@interface ClassA : NSObject
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@end
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@interface ClassB : ClassA <ProtocolY, ProtocolX>
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@end
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@interface OtherClass : NSObject
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@property (nonatomic, copy) ClassB<ProtocolX> *aProperty;
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- (ClassA<ProtocolY> *)aMethod;
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- (ClassA<ProtocolY> *)anotherMethod;
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@end
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@implementation OtherClass
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- (ClassA<ProtocolY> *)aMethod {
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// This does not work, even though ClassB subclasses from A and conforms to Y
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// because the property type explicity adds ProtocolX conformance
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// even though ClassB already conforms to ProtocolX
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return self.aProperty;
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}
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- (ClassA<ProtocolY> *)anotherMethod {
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// This works, even though all it is doing is removing an explicit
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// protocol conformance that ClassB already conforms to
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return (ClassB *)self.aProperty;
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}
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@end
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