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// RUN: %clang_cc1 -triple=x86_64-apple-darwin -fsyntax-only -verify %s
//====------------------------------------------------------------====//
// Test deprecated direct usage of the 'isa' pointer.
//====------------------------------------------------------------====//
typedef unsigned long NSUInteger;
typedef struct objc_object {
struct objc_class *isa;
} *id;
@interface NSObject {
id firstobj;
struct objc_class *isa;
}
@end
@interface Whatever : NSObject
+self;
@end
static void func() {
id x;
// rdar://8290002
[(*x).isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
[x->isa self]; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
Whatever *y;
// GCC allows this, with the following warning:
// instance variable 'isa' is @protected; this will be a hard error in the future
//
// FIXME: see if we can avoid the warning that follows the error.
[(*y).isa self]; // expected-error {{instance variable 'isa' is protected}} \
expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}}
[y->isa self]; // expected-error {{instance variable 'isa' is protected}} \
expected-warning{{receiver type 'struct objc_class *' is not 'id' or interface pointer, consider casting it to 'id'}}
}
// rdar://11702488
// If an ivar is (1) the first ivar in a root class and (2) named `isa`,
// then it should get the same warnings that id->isa gets.
@interface BaseClass {
@public
Class isa; // expected-note 4 {{instance variable is declared here}}
}
@end
@interface OtherClass {
@public
id firstIvar;
Class isa; // note, not first ivar;
}
@end
@interface Subclass : BaseClass @end
@interface SiblingClass : BaseClass @end
@interface Root @end
@interface hasIsa : Root {
@public
Class isa; // note, isa is not in root class
}
@end
@implementation Subclass
-(void)method {
hasIsa *u;
id v;
BaseClass *w;
Subclass *x;
SiblingClass *y;
OtherClass *z;
(void)v->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
(void)w->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
(void)x->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
(void)y->isa; // expected-warning {{direct access to Objective-C's isa is deprecated in favor of object_getClass()}}
(void)z->isa;
(void)u->isa;
w->isa = 0; // expected-warning {{assignment to Objective-C's isa is deprecated in favor of object_setClass()}}
}
@end
// Test for introspection of Objective-C pointers via bitmasking.
void testBitmasking(NSObject *p) {
(void) (((NSUInteger) p) & 0x1); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}}
(void) (0x1 & ((NSUInteger) p)); // expected-warning {{bitmasking for introspection of Objective-C object pointers is strongly discouraged}}
(void) (((NSUInteger) p) ^ 0x1); // no-warning
(void) (0x1 ^ ((NSUInteger) p)); // no-warning
}
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