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// RUN: %clang_cc1 -fsyntax-only -verify %s
// expected-no-diagnostics
@protocol P0
-bar;
@end
@interface A <P0>
@end
// Interface conforms to inherited protocol
@interface B0 : A <P0>
@end
@implementation B0
@end
// Interface conforms to a protocol which extends another. The other
// protocol is inherited, and extended methods are implemented.
@protocol P1 <P0>
-foo;
@end
@interface B1 : A <P1>
@end
@implementation B1
-foo { return 0; };
@end
// Interface conforms to a protocol whose methods are provided by an
// alternate inherited protocol.
@protocol P2
-bar;
@end
@interface B2 : A <P2>
@end
@implementation B2
@end
// Interface conforms to a protocol whose methods are provided by a base class.
@interface A1
-bar;
@end
@interface B3 : A1 <P2>
@end
@implementation B3
@end
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