llvm-project

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// RUN: %clang_cc1 -fsyntax-only -verify %s
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// expected-no-diagnostics
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extern "C" {
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@class Protocol;
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}
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extern "C" {
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@class I;
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}
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@interface I
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@end
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@protocol VKAnnotation;
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extern "C" {
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@protocol VKAnnotation
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  @property (nonatomic, assign) id coordinate;
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@end
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}
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