1// RUN: %clang_cc1 -fsyntax-only -verify %s 2 3typedef struct objc_object { 4 struct objc_class *isa; 5} *id; 6 7@interface NSObject { 8 id firstobj; 9 struct objc_class *isa; 10} 11@end 12@interface Whatever : NSObject 13+self; 14@end 15 16static void func() { 17 18 id x; 19 20 // rdar://8290002 21 [(*x).isa self]; // expected-warning {{direct access to objective-c's isa is deprecated in favor of object_setClass() and object_getClass()}} 22 [x->isa self]; // expected-warning {{direct access to objective-c's isa is deprecated in favor of object_setClass() and object_getClass()}} 23 24 Whatever *y; 25 26 // GCC allows this, with the following warning: 27 // instance variable 'isa' is @protected; this will be a hard error in the future 28 // 29 // FIXME: see if we can avoid the 2 warnings that follow the error. 30 [(*y).isa self]; // expected-error {{instance variable 'isa' is protected}} \ 31 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} \ 32 expected-warning{{method '-self' not found (return type defaults to 'id')}} 33 [y->isa self]; // expected-error {{instance variable 'isa' is protected}} \ 34 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} \ 35 expected-warning{{method '-self' not found (return type defaults to 'id')}} 36} 37 38// rdar://11702488 39// If an ivar is (1) the first ivar in a root class and (2) named `isa`, 40// then it should get the same warnings that id->isa gets. 41 42@interface BaseClass { 43@public 44 Class isa; // expected-note 3 {{ivar is declared here}} 45} 46@end 47 48@interface OtherClass { 49@public 50 id firstIvar; 51 Class isa; // note, not first ivar; 52} 53@end 54 55@interface Subclass : BaseClass @end 56 57@interface SiblingClass : BaseClass @end 58 59@interface Root @end 60 61@interface hasIsa : Root { 62@public 63 Class isa; // note, isa is not in root class 64} 65@end 66 67@implementation Subclass 68-(void)method { 69 hasIsa *u; 70 id v; 71 BaseClass *w; 72 Subclass *x; 73 SiblingClass *y; 74 OtherClass *z; 75 (void)v->isa; // expected-warning {{direct access to objective-c's isa is deprecated}} 76 (void)w->isa; // expected-warning {{direct access to objective-c's isa is deprecated}} 77 (void)x->isa; // expected-warning {{direct access to objective-c's isa is deprecated}} 78 (void)y->isa; // expected-warning {{direct access to objective-c's isa is deprecated}} 79 (void)z->isa; 80 (void)u->isa; 81} 82@end 83 84