| // RUN: %clang_cc1 -triple arm64-apple-ios11 -fapplication-extension -Wdeprecated-implementations -verify -Wno-objc-root-class %s | 
 | // RUN: %clang_cc1 -triple arm64-apple-tvos11 -fapplication-extension -Wdeprecated-implementations -verify -Wno-objc-root-class %s | 
 | // Declarations marked as 'unavailable' in an app extension should not generate a | 
 | // warning on implementation. | 
 |  | 
 | @interface Parent | 
 | - (void)ok __attribute__((availability(ios_app_extension,unavailable,message="not available"))); | 
 | - (void)reallyUnavail __attribute__((availability(ios,unavailable))); // expected-note {{method 'reallyUnavail' declared here}} | 
 | - (void)reallyUnavail2 __attribute__((unavailable)); // expected-note {{method 'reallyUnavail2' declared here}} | 
 | @end | 
 |  | 
 | @interface Child : Parent | 
 | @end | 
 |  | 
 | @implementation Child | 
 |  | 
 | - (void)ok { // no warning. | 
 | } | 
 | - (void)reallyUnavail { // expected-warning {{implementing unavailable method}} | 
 | } | 
 | - (void)reallyUnavail2 { // expected-warning {{implementing unavailable method}} | 
 | } | 
 |  | 
 | @end |