1// RUN: %clang_cc1 -triple=x86_64-apple-darwin -fsyntax-only -verify %s 2 3//====------------------------------------------------------------====// 4// Test deprecated direct usage of the 'isa' pointer. 5//====------------------------------------------------------------====// 6 7typedef unsigned long NSUInteger; 8 9typedef struct objc_object { 10 struct objc_class *isa; 11} *id; 12 13@interface NSObject { 14 id firstobj; 15 struct objc_class *isa; 16} 17@end 18@interface Whatever : NSObject 19+self; 20@end 21 22static void func() { 23 24 id x; 25 26 // rdar://8290002 27 [(*x).isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 28 [x->isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 29 30 Whatever *y; 31 32 // GCC allows this, with the following warning: 33 // instance variable 'isa' is @protected; this will be a hard error in the future 34 // 35 // FIXME: see if we can avoid the warning that follows the error. 36 [(*y).isa self]; // expected-error {{instance variable 'isa' is protected}} \ 37 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} 38 [y->isa self]; // expected-error {{instance variable 'isa' is protected}} \ 39 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}} 40} 41 42// rdar://11702488 43// If an ivar is (1) the first ivar in a root class and (2) named `isa`, 44// then it should get the same warnings that id->isa gets. 45 46@interface BaseClass { 47@public 48 Class isa; // expected-note 4 {{instance variable is declared here}} 49} 50@end 51 52@interface OtherClass { 53@public 54 id firstIvar; 55 Class isa; // note, not first ivar; 56} 57@end 58 59@interface Subclass : BaseClass @end 60 61@interface SiblingClass : BaseClass @end 62 63@interface Root @end 64 65@interface hasIsa : Root { 66@public 67 Class isa; // note, isa is not in root class 68} 69@end 70 71@implementation Subclass 72-(void)method { 73 hasIsa *u; 74 id v; 75 BaseClass *w; 76 Subclass *x; 77 SiblingClass *y; 78 OtherClass *z; 79 (void)v->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 80 (void)w->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 81 (void)x->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 82 (void)y->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}} 83 (void)z->isa; 84 (void)u->isa; 85 86 w->isa = 0; // expected-warning {{assignment to Objective-C's isa is deprecated in favor of object_setClass()}} 87} 88@end 89 90