1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 typedef 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 16 static 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 warning that follows 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 [y->isa self]; // expected-error {{instance variable 'isa' is protected}} \ 33 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} 34 } 35 36 // rdar://11702488 37 // If an ivar is (1) the first ivar in a root class and (2) named `isa`, 38 // then it should get the same warnings that id->isa gets. 39 40 @interface BaseClass { 41 @public 42 Class isa; // expected-note 3 {{instance variable is declared here}} 43 } 44 @end 45 46 @interface OtherClass { 47 @public 48 id firstIvar; 49 Class isa; // note, not first ivar; 50 } 51 @end 52 53 @interface Subclass : BaseClass @end 54 55 @interface SiblingClass : BaseClass @end 56 57 @interface Root @end 58 59 @interface hasIsa : Root { 60 @public 61 Class isa; // note, isa is not in root class 62 } 63 @end 64 65 @implementation Subclass 66 -(void)method { 67 hasIsa *u; 68 id v; 69 BaseClass *w; 70 Subclass *x; 71 SiblingClass *y; 72 OtherClass *z; 73 (void)v->isa; // expected-warning {{direct access to Objective-C's isa is deprecated}} 74 (void)w->isa; // expected-warning {{direct access to Objective-C's isa is deprecated}} 75 (void)x->isa; // expected-warning {{direct access to Objective-C's isa is deprecated}} 76 (void)y->isa; // expected-warning {{direct access to Objective-C's isa is deprecated}} 77 (void)z->isa; 78 (void)u->isa; 79 } 80 @end 81 82
