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1// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fobjc-runtime-has-weak -fsyntax-only -fobjc-arc -fblocks -verify -Wno-objc-root-class %s
2
3typedef unsigned long NSUInteger;
4typedef const void * CFTypeRef;
5CFTypeRef CFBridgingRetain(id X);
6id CFBridgingRelease(CFTypeRef);
7@protocol NSCopying @end
8@interface NSDictionary
9+ (id)dictionaryWithObjects:(const id [])objects forKeys:(const id <NSCopying> [])keys count:(NSUInteger)cnt;
10- (void)setObject:(id)object forKeyedSubscript:(id)key;
11@end
12@class NSFastEnumerationState;
13@protocol NSFastEnumeration
14- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id __unsafe_unretained [])buffer count:(NSUInteger)len;
15@end
16@interface NSNumber
17+ (NSNumber *)numberWithInt:(int)value;
18@end
19@interface NSArray <NSFastEnumeration>
20+ (id)arrayWithObjects:(const id [])objects count:(NSUInteger)cnt;
21@end
22
23void test0(void (*fn)(int), int val) {
24  fn(val);
25}
26
27@interface A
28- (id)retain;
29- (id)autorelease;
30- (oneway void)release;
31- (void)dealloc;
32- (NSUInteger)retainCount;
33@end
34
35void test1(A *a) {
36  SEL s = @selector(retain);	// expected-error {{ARC forbids use of 'retain' in a @selector}}
37  s = @selector(release);	// expected-error {{ARC forbids use of 'release' in a @selector}}
38  s = @selector(autorelease);	// expected-error {{ARC forbids use of 'autorelease' in a @selector}}
39  s = @selector(dealloc);	// expected-error {{ARC forbids use of 'dealloc' in a @selector}}
40  [a dealloc]; // expected-error {{ARC forbids explicit message send of 'dealloc'}}
41  [a retain]; // expected-error {{ARC forbids explicit message send of 'retain'}}
42  [a retainCount]; // expected-error {{ARC forbids explicit message send of 'retainCount'}}
43  [a release]; // expected-error {{ARC forbids explicit message send of 'release'}}
44  [a autorelease]; // expected-error {{ARC forbids explicit message send of 'autorelease'}}
45}
46
47@interface Test2 : A
48- (void) dealloc;
49@end
50@implementation Test2
51- (void) dealloc {
52  // This should maybe just be ignored.  We're just going to warn about it for now.
53  [super dealloc]; // expected-error {{ARC forbids explicit message send of 'dealloc'}}
54}
55@end
56
57// rdar://8843638
58
59@interface I
60- (id)retain; // expected-note {{method 'retain' declared here}}
61- (id)autorelease; // expected-note {{method 'autorelease' declared here}}
62- (oneway void)release; // expected-note {{method 'release' declared here}}
63- (NSUInteger)retainCount; // expected-note {{method 'retainCount' declared here}}
64@end
65
66@implementation I
67- (id)retain{return 0;} // expected-error {{ARC forbids implementation of 'retain'}}
68- (id)autorelease{return 0;} // expected-error {{ARC forbids implementation of 'autorelease'}}
69- (oneway void)release{} // expected-error {{ARC forbids implementation of 'release'}}
70- (NSUInteger)retainCount{ return 0; } // expected-error {{ARC forbids implementation of 'retainCount'}}
71@end
72
73@implementation I(CAT)
74- (id)retain{return 0;} // expected-error {{ARC forbids implementation of 'retain'}} \
75                        // expected-warning {{category is implementing a method which will also be implemented by its primary class}}
76- (id)autorelease{return 0;} // expected-error {{ARC forbids implementation of 'autorelease'}} \
77                         // expected-warning {{category is implementing a method which will also be implemented by its primary class}}
78- (oneway void)release{} // expected-error {{ARC forbids implementation of 'release'}} \
79                          // expected-warning {{category is implementing a method which will also be implemented by its primary class}}
80- (NSUInteger)retainCount{ return 0; } // expected-error {{ARC forbids implementation of 'retainCount'}} \
81                          // expected-warning {{category is implementing a method which will also be implemented by its primary class}}
82@end
83
84// rdar://8861761
85
86@interface B
87+ (id)alloc;
88- (id)initWithInt: (int) i;
89- (id)myInit __attribute__((objc_method_family(init)));
90- (id)myBadInit __attribute__((objc_method_family(12)));  // expected-error {{'objc_method_family' attribute requires parameter 1 to be an identifier}}
91
92@end
93
94void rdar8861761() {
95  B *o1 = [[B alloc] initWithInt:0];
96  B *o2 = [B alloc];
97  [o2 initWithInt:0]; // expected-warning {{expression result unused}}
98  B *o3 = [[B alloc] myInit];
99  [[B alloc] myInit]; // expected-warning {{expression result unused}}
100}
101
102// rdar://8925835
103@interface rdar8925835
104- (void)foo:(void (^)(unsigned captureCount, I * const capturedStrings[captureCount]))block;
105@end
106
107void test5() {
108  extern void test5_helper(__autoreleasing id *);
109  id x;
110
111  // Okay because of magic temporaries.
112  test5_helper(&x);
113
114  __autoreleasing id *a = &x; // expected-error {{initializing '__autoreleasing id *' with an expression of type '__strong id *' changes retain/release properties of pointer}}
115
116  a = &x; // expected-error {{assigning '__strong id *' to '__autoreleasing id *' changes retain/release properties of pointer}}
117
118  extern void test5_helper2(id const *);
119  test5_helper2(&x);
120
121  extern void test5_helper3(__weak id *); // expected-note {{passing argument to parameter here}}
122  test5_helper3(&x); // expected-error {{passing '__strong id *' to parameter of type '__weak id *' changes retain/release properties of pointer}}
123}
124
125// rdar://problem/8937869
126void test6(unsigned cond) {
127  switch (cond) {
128  case 0:
129    ;
130    id x; // expected-note {{jump bypasses initialization of retaining variable}}
131
132  case 1: // expected-error {{switch case is in protected scope}}
133    break;
134  }
135}
136
137@class NSError;
138void test7(void) {
139  extern void test7_helper(NSError **);
140  NSError *err;
141  test7_helper(&err);
142}
143void test7_weak(void) {
144  extern void test7_helper(NSError **);
145  __weak NSError *err;
146  test7_helper(&err);
147}
148void test7_unsafe(void) {
149  extern void test7_helper(NSError **); // expected-note {{passing argument to parameter here}}
150  __unsafe_unretained NSError *err;
151  test7_helper(&err); // expected-error {{passing 'NSError *__unsafe_unretained *' to parameter of type 'NSError *__autoreleasing *' changes retain/release properties of pointer}}
152}
153
154@class Test8_incomplete;
155@interface Test8_complete @end;
156@interface Test8_super @end;
157@interface Test8 : Test8_super
158- (id) init00;
159- (id) init01; // expected-note {{declaration in interface}} \
160               // expected-note{{overridden method}}
161- (id) init02; // expected-note{{overridden method}}
162- (id) init03; // covariance
163- (id) init04; // covariance
164- (id) init05; // expected-note{{overridden method}}
165
166- (void) init10; // expected-note {{declaration in interface is not in the 'init' family because its result type is not an object pointer}}
167- (void) init11;
168- (void) init12;
169- (void) init13; // expected-note {{declaration in interface is not in the 'init' family because its result type is not an object pointer}}
170- (void) init14; // expected-note {{declaration in interface is not in the 'init' family because its result type is not an object pointer}}
171- (void) init15;
172
173// These should be invalid to actually call.
174- (Test8_incomplete*) init20;
175- (Test8_incomplete*) init21; // expected-note {{declaration in interface}}
176- (Test8_incomplete*) init22;
177- (Test8_incomplete*) init23;
178- (Test8_incomplete*) init24;
179- (Test8_incomplete*) init25;
180
181- (Test8_super*) init30; // id exception to covariance
182- (Test8_super*) init31; // expected-note {{declaration in interface}} \
183                         // expected-note{{overridden method}}
184- (Test8_super*) init32; // expected-note{{overridden method}}
185- (Test8_super*) init33;
186- (Test8_super*) init34; // covariance
187- (Test8_super*) init35; // expected-note{{overridden method}}
188
189- (Test8*) init40; // id exception to covariance
190- (Test8*) init41; // expected-note {{declaration in interface}} \
191                   // expected-note{{overridden method}}
192- (Test8*) init42; // expected-note{{overridden method}}
193- (Test8*) init43; // this should be a warning, but that's a general language thing, not an ARC thing
194- (Test8*) init44;
195- (Test8*) init45; // expected-note{{overridden method}}
196
197- (Test8_complete*) init50; // expected-error {{init methods must return a type related to the receiver type}}
198- (Test8_complete*) init51; // expected-error {{init methods must return a type related to the receiver type}}
199- (Test8_complete*) init52; // expected-error {{init methods must return a type related to the receiver type}}
200- (Test8_complete*) init53; // expected-error {{init methods must return a type related to the receiver type}}
201- (Test8_complete*) init54; // expected-error {{init methods must return a type related to the receiver type}}
202- (Test8_complete*) init55; // expected-error {{init methods must return a type related to the receiver type}}
203@end
204@implementation Test8
205- (id) init00 { return 0; }
206- (id) init10 { return 0; } // expected-error {{method implementation does not match its declaration}}
207- (id) init20 { return 0; }
208- (id) init30 { return 0; }
209- (id) init40 { return 0; }
210- (id) init50 { return 0; }
211
212- (void) init01 {} // expected-error {{method was declared as an 'init' method, but its implementation doesn't match because its result type is not an object pointer}} \
213                   // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'void'}}
214- (void) init11 {}
215- (void) init21 {} // expected-error {{method was declared as an 'init' method, but its implementation doesn't match because its result type is not an object pointer}}
216- (void) init31 {} // expected-error {{method was declared as an 'init' method, but its implementation doesn't match because its result type is not an object pointer}} \
217                   // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'void'}}
218- (void) init41 {} // expected-error {{method was declared as an 'init' method, but its implementation doesn't match because its result type is not an object pointer}} \
219                   // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'void'}}
220- (void) init51 {}
221
222- (Test8_incomplete*) init02 { return 0; } // expected-error {{init methods must return a type related to the receiver type}} \
223                                           // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'Test8_incomplete *'}}
224- (Test8_incomplete*) init12 { return 0; } // expected-error {{init methods must return a type related to the receiver type}}
225- (Test8_incomplete*) init22 { return 0; } // expected-error {{init methods must return a type related to the receiver type}}
226- (Test8_incomplete*) init32 { return 0; } // expected-error {{init methods must return a type related to the receiver type}} \
227                                           // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'Test8_incomplete *'}}
228- (Test8_incomplete*) init42 { return 0; } // expected-error {{init methods must return a type related to the receiver type}} \
229                                           // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'Test8_incomplete *'}}
230- (Test8_incomplete*) init52 { return 0; } // expected-error {{init methods must return a type related to the receiver type}}
231
232- (Test8_super*) init03 { return 0; }
233- (Test8_super*) init13 { return 0; } // expected-error {{method implementation does not match its declaration}}
234- (Test8_super*) init23 { return 0; }
235- (Test8_super*) init33 { return 0; }
236- (Test8_super*) init43 { return 0; }
237- (Test8_super*) init53 { return 0; }
238
239- (Test8*) init04 { return 0; }
240- (Test8*) init14 { return 0; } // expected-error {{method implementation does not match its declaration}}
241- (Test8*) init24 { return 0; }
242- (Test8*) init34 { return 0; }
243- (Test8*) init44 { return 0; }
244- (Test8*) init54 { return 0; }
245
246- (Test8_complete*) init05 { return 0; } // expected-error {{init methods must return a type related to the receiver type}} \
247                                         // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'Test8_complete *'}}
248- (Test8_complete*) init15 { return 0; } // expected-error {{init methods must return a type related to the receiver type}}
249- (Test8_complete*) init25 { return 0; } // expected-error {{init methods must return a type related to the receiver type}}
250- (Test8_complete*) init35 { return 0; } // expected-error {{init methods must return a type related to the receiver type}} \
251                                         // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'Test8_complete *'}}
252- (Test8_complete*) init45 { return 0; } // expected-error {{init methods must return a type related to the receiver type}} \
253                                         // expected-warning{{method is expected to return an instance of its class type 'Test8', but is declared to return 'Test8_complete *'}}
254- (Test8_complete*) init55 { return 0; } // expected-error {{init methods must return a type related to the receiver type}}
255@end
256
257@class Test9_incomplete;
258@interface Test9
259- (Test9_incomplete*) init1; // expected-error {{init methods must return a type related to the receiver type}}
260- (Test9_incomplete*) init2;
261@end
262id test9(Test9 *v) {
263  return [v init1];
264}
265
266// Test that the inference rules are different for fast enumeration variables.
267void test10(id collection) {
268  for (id x in collection) {
269    __strong id *ptr = &x; // expected-warning {{initializing '__strong id *' with an expression of type 'const __strong id *' discards qualifiers}}
270  }
271
272  for (__strong id x in collection) {
273    __weak id *ptr = &x; // expected-error {{initializing '__weak id *' with an expression of type '__strong id *' changes retain/release properties of pointer}}
274  }
275}
276
277// rdar://problem/9078626
278#define nil ((void*) 0)
279void test11(id op, void *vp) {
280  _Bool b;
281  b = (op == nil);
282  b = (nil == op);
283
284  b = (vp == nil);
285  b = (nil == vp);
286
287  b = (vp == op); // expected-error {{implicit conversion of Objective-C pointer type 'id' to C pointer type 'void *' requires a bridged cast}} expected-note {{use __bridge}} expected-note {{use CFBridgingRetain call}}
288  b = (op == vp);
289}
290
291void test12(id collection) {
292  for (id x in collection) {
293    x = 0; // expected-error {{fast enumeration variables can't be modified in ARC by default; declare the variable __strong to allow this}}
294  }
295
296  for (const id x in collection) {
297    x = 0; // expected-error {{read-only variable is not assignable}}
298  }
299
300  for (__strong id x in collection) {
301    x = 0;
302  }
303}
304
305@interface Test13
306- (id) init0;
307- (void) noninit;
308@end
309@implementation Test13
310- (id) init0 {
311  self = 0;
312}
313- (void) noninit {
314  self = 0; // expected-error {{cannot assign to 'self' outside of a method in the init family}}
315}
316@end
317
318// <rdar://problem/10274056>
319@interface Test13_B
320- (id) consumesSelf __attribute__((ns_consumes_self));
321@end
322@implementation Test13_B
323- (id) consumesSelf {
324  self = 0; // no-warning
325}
326@end
327
328// rdar://problem/9172151
329@class Test14A, Test14B;
330void test14() {
331  extern void test14_consume(id *);
332  extern int test14_cond(void);
333  extern float test14_nowriteback(id __autoreleasing const *); // expected-note{{passing argument to parameter here}}
334
335  Test14A *a;
336  Test14B *b;
337  id i;
338  id cla[10];
339  id vla[test14_cond() + 10];
340
341  test14_consume((__strong id*) &a);
342  test14_consume((test14_cond() ? (__strong id*) &b : &i));
343  test14_consume(test14_cond() ? 0 : &a);
344  test14_consume(test14_cond() ? (void*) 0 : (&a));
345  test14_consume(cla); // expected-error {{passing address of non-scalar object to __autoreleasing parameter for write-back}}
346  test14_consume(vla); // expected-error {{passing address of non-scalar object to __autoreleasing parameter for write-back}}
347  test14_consume(&cla[5]); // expected-error {{passing address of non-scalar object to __autoreleasing parameter for write-back}}
348
349  __strong id *test14_indirect(void);
350  test14_consume(test14_indirect()); // expected-error {{passing address of non-local object to __autoreleasing parameter for write-back}}
351
352  extern id test14_global;
353  test14_consume(&test14_global); // expected-error {{passing address of non-local object to __autoreleasing parameter for write-back}}
354
355  extern __strong id *test14_global_ptr;
356  test14_consume(test14_global_ptr); // expected-error {{passing address of non-local object to __autoreleasing parameter for write-back}}
357
358  static id static_local;
359  test14_consume(&static_local); // expected-error {{passing address of non-local object to __autoreleasing parameter for write-back}}
360
361  __weak id* wip;
362  test14_nowriteback(&static_local); // okay, not a write-back.
363  test14_nowriteback(wip); // expected-error{{passing '__weak id *' to parameter of type '__autoreleasing id const *' changes retain/release properties of pointer}}
364}
365
366void test15() {
367  __block __autoreleasing id x; // expected-error {{__block variables cannot have __autoreleasing ownership}}
368}
369
370struct Test16;
371@interface Test16a
372- (void) test16_0: (int) x;
373- (int) test16_1: (int) x; // expected-note {{one possibility}}
374- (int) test16_2: (int) x; // expected-note {{one possibility}}
375- (id) test16_3: (int) x __attribute__((ns_returns_retained)); // expected-note {{one possibility}}
376- (void) test16_4: (int) x __attribute__((ns_consumes_self)); // expected-note {{one possibility}}
377- (void) test16_5: (id) __attribute__((ns_consumed)) x; // expected-note {{one possibility}}
378- (void) test16_6: (id) x;
379@end
380
381@interface Test16b
382- (void) test16_0: (int) x;
383- (int) test16_1: (char*) x; // expected-note {{also found}}
384- (char*) test16_2: (int) x; // expected-note {{also found}}
385- (id) test16_3: (int) x; // expected-note {{also found}}
386- (void) test16_4: (int) x; // expected-note {{also found}}
387- (void) test16_5: (id) x; // expected-note {{also found}}
388- (void) test16_6: (struct Test16 *) x;
389@end
390
391void test16(void) {
392  id v;
393  [v test16_0: 0];
394  [v test16_1: 0]; // expected-error {{multiple methods named 'test16_1:' found with mismatched result, parameter type or attributes}}
395  [v test16_2: 0]; // expected-error {{multiple methods named}}
396  [v test16_3: 0]; // expected-error {{multiple methods named}}
397  [v test16_4: 0]; // expected-error {{multiple methods named}}
398  [v test16_5: 0]; // expected-error {{multiple methods named}}
399  [v test16_6: 0];
400}
401
402@class Test17; // expected-note 2{{forward declaration of class here}}
403@protocol Test17p
404- (void) test17;
405+ (void) test17;
406@end
407void test17(void) {
408  Test17 *v0;
409  [v0 test17]; // expected-error {{receiver type 'Test17' for instance message is a forward declaration}}
410
411  Test17<Test17p> *v1;
412  [v1 test17]; // expected-error {{receiver type 'Test17<Test17p>' for instance message is a forward declaration}}
413
414  [Test17 test17]; // expected-error {{receiver 'Test17' for class message is a forward declaration}}
415}
416
417void test18(void) {
418  id x;
419  [x test18]; // expected-error {{instance method 'test18' not found ; did you mean 'test17'?}}
420}
421
422extern struct Test19 *test19a;
423struct Test19 *const test19b = 0;
424void test19(void) {
425  id x;
426  x = (id) test19a; // expected-error {{bridged cast}} \
427  // expected-note{{use __bridge to convert directly (no change in ownership)}} \
428  // expected-note{{use CFBridgingRelease call to transfer ownership of a +1 'struct Test19 *' into ARC}}
429  x = (id) test19b; // expected-error {{bridged cast}} \
430  // expected-note{{use __bridge to convert directly (no change in ownership)}} \
431  // expected-note{{use CFBridgingRelease call to transfer ownership of a +1 'struct Test19 *' into ARC}}
432}
433
434// rdar://problem/8951453
435static __thread id test20_implicit; // expected-error {{thread-local variable has non-trivial ownership: type is '__strong id'}}
436static __thread __strong id test20_strong; // expected-error {{thread-local variable has non-trivial ownership: type is '__strong id'}}
437static __thread __weak id test20_weak; // expected-error {{thread-local variable has non-trivial ownership: type is '__weak id'}}
438static __thread __autoreleasing id test20_autoreleasing; // expected-error {{thread-local variable has non-trivial ownership: type is '__autoreleasing id'}} expected-error {{global variables cannot have __autoreleasing ownership}}
439static __thread __unsafe_unretained id test20_unsafe;
440void test20(void) {
441  static __thread id test20_implicit; // expected-error {{thread-local variable has non-trivial ownership: type is '__strong id'}}
442  static __thread __strong id test20_strong; // expected-error {{thread-local variable has non-trivial ownership: type is '__strong id'}}
443  static __thread __weak id test20_weak; // expected-error {{thread-local variable has non-trivial ownership: type is '__weak id'}}
444  static __thread __autoreleasing id test20_autoreleasing; // expected-error {{thread-local variable has non-trivial ownership: type is '__autoreleasing id'}} expected-error {{global variables cannot have __autoreleasing ownership}}
445  static __thread __unsafe_unretained id test20_unsafe;
446}
447
448// rdar://9310049
449_Bool fn(id obj) {
450    return (_Bool)obj;
451}
452
453// Check casting w/ ownership qualifiers.
454void test21() {
455  __strong id *sip;
456  (void)(__weak id *)sip; // expected-error{{casting '__strong id *' to type '__weak id *' changes retain/release properties of pointer}}
457  (void)(__weak const id *)sip; // expected-error{{casting '__strong id *' to type '__weak id const *' changes retain/release properties of pointer}}
458  (void)(__autoreleasing id *)sip; // expected-error{{casting '__strong id *' to type '__autoreleasing id *' changes retain/release properties of pointer}}
459  (void)(__autoreleasing const id *)sip; // okay
460}
461
462// rdar://problem/9340462
463void test22(id x[]) { // expected-error {{must explicitly describe intended ownership of an object array parameter}}
464}
465
466// rdar://problem/9400219
467void test23(void) {
468  void *ptr;
469  ptr = @"foo";
470  ptr = (ptr ? @"foo" : 0);
471  ptr = (ptr ? @"foo" : @"bar");
472}
473
474id test24(void) {
475  extern void test24_helper(void);
476  return test24_helper(), (void*) 0;
477}
478
479// rdar://9400841
480@interface Base
481@property (assign) id content;
482@end
483
484@interface Foo : Base
485-(void)test;
486@end
487
488@implementation Foo
489-(void)test {
490	super.content = 0;
491}
492@end
493
494// <rdar://problem/9398437>
495void test25(Class *classes) {
496  Class *other_classes;
497  test25(other_classes);
498}
499
500void test26(id y) {
501  extern id test26_var1;
502  __sync_swap(&test26_var1, 0, y); // expected-error {{cannot perform atomic operation on a pointer to type '__strong id': type has non-trivial ownership}}
503
504  extern __unsafe_unretained id test26_var2;
505  __sync_swap(&test26_var2, 0, y);
506}
507
508@interface Test26
509- (id) init;
510- (id) initWithInt: (int) x;
511@end
512@implementation Test26
513- (id) init { return self; }
514- (id) initWithInt: (int) x {
515  [self init]; // expected-error {{the result of a delegate init call must be immediately returned or assigned to 'self'}}
516  return self;
517}
518@end
519
520// rdar://9525555
521@interface  Test27 {
522  __weak id _myProp1;
523  id myProp2;
524}
525@property id x;
526@property (readonly) id ro;
527@property (readonly) id custom_ro;
528@property int y;
529
530@property (readonly) __weak id myProp1;
531@property (readonly) id myProp2;
532@property (readonly) __strong id myProp3;
533@end
534
535@implementation Test27
536@synthesize x;
537@synthesize ro;
538@synthesize y;
539
540@synthesize myProp1 = _myProp1;
541@synthesize myProp2;
542@synthesize myProp3;
543
544-(id)custom_ro { return 0; }
545@end
546
547// rdar://9569264
548@interface Test28
549@property (nonatomic, assign) __strong id a; // expected-error {{unsafe_unretained property 'a' may not also be declared __strong}}
550@end
551
552@interface Test28 ()
553@property (nonatomic, assign) __strong id b; // expected-error {{unsafe_unretained property 'b' may not also be declared __strong}}
554@end
555
556@implementation Test28
557@synthesize a;
558@synthesize b;
559@end
560
561// rdar://9573962
562typedef struct Bark Bark;
563@interface Test29
564@property Bark* P;
565@end
566
567@implementation Test29
568@synthesize P;
569- (id)Meth {
570  Bark** f = &P;
571  return 0;
572}
573@end
574
575// rdar://9495837
576@interface Test30
577+ (id) new;
578- (void)Meth;
579@end
580
581@implementation Test30
582+ (id) new { return 0; }
583- (void) Meth {
584  __weak id x = [Test30 new]; // expected-warning {{assigning retained object to weak variable}}
585  id __unsafe_unretained u = [Test30 new]; // expected-warning {{assigning retained object to unsafe_unretained variable}}
586  id y = [Test30 new];
587  x = [Test30 new]; // expected-warning {{assigning retained object to weak variable}}
588  u = [Test30 new]; // expected-warning {{assigning retained object to unsafe_unretained variable}}
589  y = [Test30 new];
590}
591@end
592
593// rdar://9411838
594@protocol PTest31 @end
595
596int Test31() {
597    Class cls;
598    id ids;
599    id<PTest31> pids;
600    Class<PTest31> pcls;
601
602    int i =  (ids->isa ? 1 : 0); // expected-error {{member reference base type 'id' is not a structure or union}}
603    int j = (pids->isa ? 1 : 0); // expected-error {{member reference base type 'id<PTest31>' is not a structure or union}}
604    int k = (pcls->isa ? i : j); // expected-error {{member reference base type 'Class<PTest31>' is not a structure or union}}
605    return cls->isa ? i : j; // expected-error {{member reference base type 'Class' is not a structure or union}}
606}
607
608// rdar://9612030
609@interface ITest32 {
610@public
611 id ivar;
612}
613@end
614
615id Test32(__weak ITest32 *x) {
616  __weak ITest32 *y;
617  x->ivar = 0; // expected-error {{dereferencing a __weak pointer is not allowed}}
618  return y ? y->ivar     // expected-error {{dereferencing a __weak pointer is not allowed}}
619           : (*x).ivar;  // expected-error {{dereferencing a __weak pointer is not allowed}}
620}
621
622// rdar://9619861
623extern int printf(const char*, ...);
624typedef long intptr_t;
625
626int Test33(id someid) {
627  printf( "Hello%ld", (intptr_t)someid);
628  return (int)someid;
629}
630
631// rdar://9636091
632@interface I34
633@property (nonatomic, retain) id newName __attribute__((ns_returns_not_retained)) ;
634
635@property (nonatomic, retain) id newName1 __attribute__((ns_returns_not_retained)) ;
636- (id) newName1 __attribute__((ns_returns_not_retained));
637
638@property (nonatomic, retain) id newName2 __attribute__((ns_returns_not_retained)); // expected-note {{roperty declared here}}
639- (id) newName2;   // expected-warning {{property declared as returning non-retained objects; getter returning retained objects}}
640@end
641
642@implementation I34
643@synthesize newName;
644
645@synthesize newName1;
646- (id) newName1 { return 0; }
647
648@synthesize newName2;
649@end
650
651void test35(void) {
652  extern void test36_helper(id*);
653  id x;
654  __strong id *xp = 0;
655
656  test36_helper(&x);
657  test36_helper(xp); // expected-error {{passing address of non-local object to __autoreleasing parameter for write-back}}
658
659  // rdar://problem/9665710
660  __block id y;
661  test36_helper(&y);
662  ^{ test36_helper(&y); }();
663
664  __strong int non_objc_type; // expected-warning {{'__strong' only applies to Objective-C object or block pointer types}}
665}
666
667void test36(int first, ...) {
668  // <rdar://problem/9758798>
669  __builtin_va_list arglist;
670  __builtin_va_start(arglist, first);
671  id obj = __builtin_va_arg(arglist, id);
672  __builtin_va_end(arglist);
673}
674
675@class Test37; // expected-note{{forward declaration of class here}}
676void test37(Test37 *c) {
677  for (id y in c) { // expected-error {{collection expression type 'Test37' is a forward declaration}}
678    (void) y;
679  }
680
681  (void)sizeof(id*); // no error.
682}
683
684// rdar://problem/9887979
685@interface Test38
686@property int value;
687@end
688void test38() {
689  extern Test38 *test38_helper(void);
690  switch (test38_helper().value) {
691  case 0:
692  case 1:
693    ;
694  }
695}
696
697// rdar://10186536
698@class NSColor;
699void _NSCalc(NSColor* color, NSColor* bezelColors[]) __attribute__((unavailable("not available in automatic reference counting mode")));
700
701void _NSCalcBeze(NSColor* color, NSColor* bezelColors[]); // expected-error {{must explicitly describe intended ownership of an object array parameter}}
702
703// rdar://9970739
704@interface RestaurantTableViewCell
705- (void) restaurantLocation;
706@end
707
708@interface Radar9970739
709- (void) Meth;
710@end
711
712@implementation Radar9970739
713- (void) Meth {
714  RestaurantTableViewCell *cell;
715  [cell restaurantLocatoin]; // expected-error {{no visible @interface for 'RestaurantTableViewCell' declares the selector 'restaurantLocatoin'}}
716}
717@end
718
719// rdar://11814185
720@interface Radar11814185
721@property (nonatomic, weak)  Radar11814185* picker1;
722+ alloc;
723- init;
724@end
725
726@implementation Radar11814185
727
728@synthesize picker1;
729
730- (void)viewDidLoad
731{
732    picker1 = [[Radar11814185 alloc] init]; // expected-warning {{assigning retained object to weak variable; object will be released after assignment}}
733    self.picker1 = [[Radar11814185 alloc] init]; // expected-warning {{assigning retained object to weak property; object will be released after assignment}}
734}
735
736+ alloc { return 0; }
737- init { return 0; }
738@end
739
740// <rdar://problem/12569201>.  Warn on cases of initializing a weak variable
741// with an Objective-C object literal.
742void rdar12569201(id key, id value) {
743    // Declarations.
744    __weak id x = @"foo"; // no-warning
745    __weak id y = @{ key : value }; // expected-warning {{assigning dictionary literal to a weak variable; object will be released after assignment}}
746    __weak id z = @[ value ]; // expected-warning {{assigning array literal to a weak variable; object will be released after assignment}}
747    __weak id b = ^() {}; // expected-warning {{assigning block literal to a weak variable; object will be released after assignment}}
748    __weak id n = @42; // expected-warning {{assigning numeric literal to a weak variable; object will be released after assignment}}
749    __weak id e = @(42); // expected-warning {{assigning numeric literal to a weak variable; object will be released after assignment}}
750    __weak id m = @(41 + 1); // expected-warning {{assigning boxed expression to a weak variable; object will be released after assignment}}
751
752    // Assignments.
753    y = @{ key : value }; // expected-warning {{assigning dictionary literal to a weak variable; object will be released after assignment}}
754    z = @[ value ]; // expected-warning {{assigning array literal to a weak variable; object will be released after assignment}}
755    b = ^() {}; // expected-warning {{assigning block literal to a weak variable; object will be released after assignment}}
756    n = @42; // expected-warning {{assigning numeric literal to a weak variable; object will be released after assignment}}
757    e = @(42); // expected-warning {{assigning numeric literal to a weak variable; object will be released after assignment}}
758    m = @(41 + 1); // expected-warning {{assigning boxed expression to a weak variable; object will be released after assignment}}
759}
760
761@interface C
762- (void)method:(id[])objects; // expected-error{{must explicitly describe intended ownership of an object array parameter}}
763@end
764
765// rdar://13752880
766@interface NSMutableArray : NSArray @end
767
768typedef __strong NSMutableArray * PSNS;
769
770void test(NSArray *x) {
771  NSMutableArray *y = x; // expected-warning {{incompatible pointer types initializing 'NSMutableArray *' with an expression of type 'NSArray *'}}
772  __strong NSMutableArray *y1 = x; // expected-warning {{incompatible pointer types initializing 'NSMutableArray *' with an expression of type 'NSArray *'}}
773  PSNS y2 = x; // expected-warning {{incompatible pointer types initializing 'NSMutableArray *' with an expression of type 'NSArray *'}}
774}
775
776// rdar://15123684
777@class NSString;
778
779void foo(NSArray *array) {
780  for (NSString *string in array) {
781    for (string in @[@"blah", @"more blah", string]) { // expected-error {{selector element of type 'NSString *const __strong' cannot be a constant l-value}}
782    }
783  }
784}
785
786// rdar://16627903
787extern void abort();
788#define TKAssertEqual(a, b) do{\
789    __typeof(a) a_res = (a);\
790    __typeof(b) b_res = (b);\
791    if ((a_res) != (b_res)) {\
792        abort();\
793    }\
794}while(0)
795
796int garf() {
797  id object;
798  TKAssertEqual(object, nil);
799  TKAssertEqual(object, (id)nil);
800}
801