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 | |
7 | typedef unsigned long NSUInteger; |
8 | |
9 | typedef struct objc_object { |
10 | struct objc_class *isa; |
11 | } *id; |
12 | |
13 | @interface NSObject { |
14 | id firstobj; |
15 | struct objc_class *isa; |
16 | } |
17 | - (id)performSelector:(SEL)aSelector;; |
18 | @end |
19 | @interface Whatever : NSObject |
20 | +self; |
21 | -(id)foo; |
22 | @end |
23 | |
24 | static void func() { |
25 | |
26 | id x; |
27 | |
28 | // rdar://8290002 |
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()}} |
31 | |
32 | Whatever *y; |
33 | |
34 | // GCC allows this, with the following warning: |
35 | // instance variable 'isa' is @protected; this will be a hard error in the future |
36 | // |
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'}} |
42 | } |
43 | |
44 | // rdar://11702488 |
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. |
47 | |
48 | @interface BaseClass { |
49 | @public |
50 | Class isa; // expected-note 4 {{instance variable is declared here}} |
51 | } |
52 | @end |
53 | |
54 | @interface OtherClass { |
55 | @public |
56 | id firstIvar; |
57 | Class isa; // note, not first ivar; |
58 | } |
59 | @end |
60 | |
61 | @interface Subclass : BaseClass @end |
62 | |
63 | @interface SiblingClass : BaseClass @end |
64 | |
65 | @interface Root @end |
66 | |
67 | @interface hasIsa : Root { |
68 | @public |
69 | Class isa; // note, isa is not in root class |
70 | } |
71 | @end |
72 | |
73 | @implementation Subclass |
74 | -(void)method { |
75 | hasIsa *u; |
76 | id v; |
77 | BaseClass *w; |
78 | Subclass *x; |
79 | SiblingClass *y; |
80 | OtherClass *z; |
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()}} |
85 | (void)z->isa; |
86 | (void)u->isa; |
87 | |
88 | w->isa = 0; // expected-warning {{assignment to Objective-C's isa is deprecated in favor of object_setClass()}} |
89 | } |
90 | @end |
91 | |
92 | // Test for introspection of Objective-C pointers via bitmasking. |
93 | |
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 |
104 | } |