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// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fsyntax-only -verify %s -Wno-objc-root-class
// Mark this protocol as requiring all of its methods and properties
// to be explicitly implemented in the adopting class.
__attribute__((objc_protocol_requires_explicit_implementation))
@protocol Protocol
- (void) theBestOfTimes; // expected-note {{method 'theBestOfTimes' declared here}}
@property (readonly) id theWorstOfTimes;
@end
// In this example, ClassA adopts the protocol. We won't
// provide the implementation here, but this protocol will
// be adopted later by a subclass.
@interface ClassA <Protocol>
- (void) theBestOfTimes;
@property (readonly) id theWorstOfTimes;
@end
// This class subclasses ClassA (which adopts 'Protocol'),
// but does not provide the needed implementation.
@interface ClassB : ClassA <Protocol> // expected-note {{required for direct or indirect protocol 'Protocol'}}
@end
@implementation ClassB // expected-warning {{method 'theBestOfTimes' in protocol not implemented}}
@end
// Test that the attribute is used correctly.
__attribute__((objc_protocol_requires_explicit_implementation(1+2))) // expected-error {{attribute takes no arguments}}
@protocol AnotherProtocol @end
// Cannot put the attribute on classes or other non-protocol declarations.
__attribute__((objc_protocol_requires_explicit_implementation)) // expected-error {{attribute only applies to Objective-C protocols}}
@interface AnotherClass @end
__attribute__((objc_protocol_requires_explicit_implementation)) // expected-error {{attribute only applies to Objective-C protocols}}
int x;
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