1 // RUN: %clang_cc1 -triple=x86_64-apple-darwin -fsyntax-only -verify %s
3 //====------------------------------------------------------------====//
4 // Test deprecated direct usage of the 'isa' pointer.
5 //====------------------------------------------------------------====//
7 typedef unsigned long NSUInteger;
9 typedef struct objc_object {
10 struct objc_class *isa;
15 struct objc_class *isa;
17 - (id)performSelector:(SEL)aSelector;;
19 @interface Whatever : NSObject
29 [(*x).isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
30 [x->isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
34 // GCC allows this, with the following warning:
35 // instance variable 'isa' is @protected; this will be a hard error in the future
37 // FIXME: see if we can avoid the warning that follows the error.
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 [y->isa self]; // expected-error {{instance variable 'isa' is protected}} \
41 expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}}
45 // If an ivar is (1) the first ivar in a root class and (2) named `isa`,
46 // then it should get the same warnings that id->isa gets.
48 @interface BaseClass {
50 Class isa; // expected-note 4 {{instance variable is declared here}}
54 @interface OtherClass {
57 Class isa; // note, not first ivar;
61 @interface Subclass : BaseClass @end
63 @interface SiblingClass : BaseClass @end
67 @interface hasIsa : Root {
69 Class isa; // note, isa is not in root class
73 @implementation Subclass
81 (void)v->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
82 (void)w->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
83 (void)x->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
84 (void)y->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
88 w->isa = 0; // expected-warning {{assignment to Objective-C's isa is deprecated in favor of object_setClass()}}
92 // Test for introspection of Objective-C pointers via bitmasking.
94 void testBitmasking(NSObject *p) {
95 (void) (((NSUInteger) p) & 0x1); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}}
96 (void) (0x1 & ((NSUInteger) p)); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}}
97 (void) (((NSUInteger) p) ^ 0x1); // no-warning
98 (void) (0x1 ^ ((NSUInteger) p)); // no-warning
99 (void) (0x1 & ((NSUInteger) [p performSelector:@selector(foo)])); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}}
100 #pragma clang diagnostic push
101 #pragma clang diagnostic ignored "-Wdeprecated-objc-pointer-introspection-performSelector"
102 (void) (0x1 & ((NSUInteger) [p performSelector:@selector(foo)])); // no-warning
103 #pragma clang diagnostic pop