| // RUN: %clang -target x86_64-apple-darwin -fsyntax-only -Xclang -verify %s | 
 | // RUN: %clang -target x86_64-apple-darwin -x objective-c++ -fsyntax-only -Xclang -verify %s | 
 |  | 
 | @interface NSObject | 
 | @end | 
 |  | 
 | __attribute__((objc_class_stub)) | 
 | @interface MissingSubclassingRestrictedAttribute : NSObject // expected-error {{'objc_class_stub' attribute cannot be specified on a class that does not have the 'objc_subclassing_restricted' attribute}} | 
 | @end | 
 |  | 
 | __attribute__((objc_class_stub)) | 
 | __attribute__((objc_subclassing_restricted)) | 
 | @interface ValidClassStubAttribute : NSObject | 
 | @end | 
 |  | 
 | @implementation ValidClassStubAttribute // expected-error {{cannot declare implementation of a class declared with the 'objc_class_stub' attribute}} | 
 | @end | 
 |  | 
 | @implementation ValidClassStubAttribute (MyCategory) | 
 | @end | 
 |  | 
 | __attribute__((objc_class_stub(123))) // expected-error {{'objc_class_stub' attribute takes no arguments}} | 
 | @interface InvalidClassStubAttribute : NSObject | 
 | @end | 
 |  | 
 | __attribute__((objc_class_stub)) // expected-error {{'objc_class_stub' attribute only applies to Objective-C interfaces}} | 
 | int cannotHaveObjCClassStubAttribute(void) {} |