|  | // RUN: %clang_cc1 -fsyntax-only -verify -Wno-objc-root-class %s | 
|  |  | 
|  | @interface X1 | 
|  | @end | 
|  | @implementation X1 // expected-note {{implementation started here}} | 
|  | @interface Y1 // expected-error {{missing '@end'}} | 
|  | @end | 
|  | @end // expected-error {{'@end' must appear in an Objective-C context}} | 
|  |  | 
|  | @interface X2 | 
|  | @end | 
|  | @implementation X2 // expected-note {{implementation started here}} | 
|  | @protocol Y2 // expected-error {{missing '@end'}} | 
|  | @end | 
|  | @end // expected-error {{'@end' must appear in an Objective-C context}} | 
|  |  | 
|  | @interface X6 // expected-note {{class started here}} | 
|  | @interface X7 // expected-error {{missing '@end'}} | 
|  | @end | 
|  | @end // expected-error {{'@end' must appear in an Objective-C context}} | 
|  |  | 
|  | @protocol P1 // expected-note {{protocol started here}} | 
|  | @interface P2 // expected-error {{missing '@end'}} | 
|  | @end | 
|  | @end // expected-error {{'@end' must appear in an Objective-C context}} | 
|  |  | 
|  | @interface X4 // expected-note {{class started here}} | 
|  | @implementation X4 // expected-error {{missing '@end'}} | 
|  | @end | 
|  | @end // expected-error {{'@end' must appear in an Objective-C context}} | 
|  |  | 
|  | @interface I | 
|  | @end | 
|  | @implementation I | 
|  | @protocol P; // forward declarations of protocols in @implementations is allowed | 
|  | @class C; // forward declarations of classes in @implementations is allowed | 
|  | - (C<P>*) MyMeth {} | 
|  | @end | 
|  |  | 
|  | @interface I2 {} | 
|  | @protocol P2; // expected-error {{illegal interface qualifier}} | 
|  | @class C2; // expected-error {{illegal interface qualifier}} | 
|  | @end | 
|  |  | 
|  | @interface I3 | 
|  | @end | 
|  | @implementation I3 | 
|  | - Meth {} | 
|  | + Cls {} | 
|  | @protocol P3; | 
|  | @end |