llvm-project/clang/test/SemaObjCXX/objc-decls-inside-namespace.mm

// RUN: clang -cc1 -fsyntax-only -verify %s

namespace C {

@protocol P; //expected-error{{Objective-C declarations may only appear in global scope}}

@class Bar; //expected-error{{Objective-C declarations may only appear in global scope}}

@compatibility_alias Foo Bar; //expected-error{{Objective-C declarations may only appear in global scope}}

@interface A //expected-error{{Objective-C declarations may only appear in global scope}}
@end

@implementation A //expected-error{{Objective-C declarations may only appear in global scope}}
@end

@protocol P //expected-error{{Objective-C declarations may only appear in global scope}}
@end

@interface A(C) //expected-error{{Objective-C declarations may only appear in global scope}}
@end

@implementation A(C) //expected-error{{Objective-C declarations may only appear in global scope}}
@end

}