103 lines
2.7 KiB
Objective-C
103 lines
2.7 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fsyntax-only -verify %s -Wno-objc-root-class
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// Mark this protocol as requiring all of its methods and properties
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// to be explicitly implemented in the adopting class.
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__attribute__((objc_protocol_requires_explicit_implementation))
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@protocol Protocol
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- (void) theBestOfTimes; // expected-note {{method 'theBestOfTimes' declared here}}
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@property (readonly) id theWorstOfTimes;
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@end
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// In this example, ClassA adopts the protocol. We won't
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// provide the implementation here, but this protocol will
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// be adopted later by a subclass.
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@interface ClassA <Protocol>
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- (void) theBestOfTimes;
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@property (readonly) id theWorstOfTimes;
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@end
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// This class subclasses ClassA (which adopts 'Protocol'),
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// but does not provide the needed implementation.
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@interface ClassB : ClassA <Protocol>
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@end
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@implementation ClassB // expected-warning {{method 'theBestOfTimes' in protocol 'Protocol' not implemented}}
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@end
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// Test that inherited protocols do not get the explicit conformance requirement.
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@protocol Inherited
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- (void) fairIsFoul;
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@end
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__attribute__((objc_protocol_requires_explicit_implementation))
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@protocol Derived <Inherited>
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- (void) foulIsFair; // expected-note {{method 'foulIsFair' declared here}}
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@end
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@interface ClassC <Inherited>
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@end
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@interface ClassD : ClassC <Derived>
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@end
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@implementation ClassD // expected-warning {{method 'foulIsFair' in protocol 'Derived' not implemented}}
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@end
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// Test that the attribute is used correctly.
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__attribute__((objc_protocol_requires_explicit_implementation(1+2))) // expected-error {{attribute takes no arguments}}
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@protocol AnotherProtocol @end
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// Cannot put the attribute on classes or other non-protocol declarations.
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__attribute__((objc_protocol_requires_explicit_implementation)) // expected-error {{attribute only applies to Objective-C protocols}}
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@interface AnotherClass @end
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__attribute__((objc_protocol_requires_explicit_implementation)) // expected-error {{attribute only applies to Objective-C protocols}}
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int x;
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// Test that inherited protocols with the attribute
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// are treated properly.
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__attribute__((objc_protocol_requires_explicit_implementation))
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@protocol ProtocolA
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@required
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- (void)rlyeh;
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- (void)innsmouth;
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@end
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@protocol ProtocolB <ProtocolA>
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@required
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- (void)dunwich;
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- (id)innsmouth;
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@end
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@protocol ProtocolC
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@required
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- (void)rlyeh;
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- (void)innsmouth;
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- (void)dunwich;
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@end
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@interface MyObject <ProtocolC>
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@end
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@interface MyLovecraft <ProtocolA>
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@end
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@interface MyShoggoth : MyLovecraft <ProtocolB>
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@end
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@implementation MyObject
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- (void)innsmouth {}
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- (void)rlyeh {}
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- (void)dunwich {}
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@end
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@implementation MyLovecraft
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- (void)innsmouth {}
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- (void)rlyeh {}
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@end
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@implementation MyShoggoth
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- (void)dunwich {}
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@end
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