1// RUN: %clang_cc1 -verify -fsyntax-only %s 2 3__attribute__((objc_runtime_visible)) 4@interface A 5@end 6 7@interface A(X) 8@end 9 10@implementation A(X) // expected-error{{cannot implement a category for class 'A' that is only visible via the Objective-C runtime}} 11@end 12 13@interface B : A 14@end 15 16@implementation B // expected-error{{cannot implement subclass 'B' of a superclass 'A' that is only visible via the Objective-C runtime}} 17@end 18 19 20