/* APPLE LOCAL file mainline */ /* { dg-do run } */ /* APPLE LOCAL radar 4894756 */ #include "../objc/execute/Object2.h" #include <stdlib.h> typedef struct MyWidget { int a; } MyWidget; MyWidget gWidget = { 17 }; @protocol MyProto - (MyWidget *)widget; @end @interface Foo: Object @end @interface Bar: Foo <MyProto> @end @interface Container: Object + (MyWidget *)elementForView:(Foo *)view; @end @implementation Foo @end @implementation Bar - (MyWidget *)widget { return &gWidget; } @end @implementation Container + (MyWidget *)elementForView:(Foo *)view { MyWidget *widget = nil; if ([view conformsTo:@protocol(MyProto)]) { widget = [(Foo <MyProto> *)view widget]; } return widget; } @end int main(void) { id view = [Bar new]; MyWidget *w = [Container elementForView: view]; if (!w || w->a != 17) abort (); return 0; }