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