[clang] Implement lifetime analysis for lifetime_capture_by(X) (#115921)
[llvm-project.git] / clang / test / SemaObjC / parameterized_classes_subst.m
blob98dd88c3bc98e383a4ce57eda6f1de26f1c2b3a0
1 // RUN: %clang_cc1 -fblocks -fsyntax-only -Wnullable-to-nonnull-conversion %s -verify
2 //
3 // Test the substitution of type arguments for type parameters when
4 // using parameterized classes in Objective-C.
6 @protocol NSObject
7 @end
9 __attribute__((objc_root_class))
10 @interface NSObject <NSObject>
11 + (instancetype)alloc;
12 - (instancetype)init;
13 @end
15 @protocol NSCopying
16 @end
18 @interface NSString : NSObject <NSCopying>
19 @end
21 @interface NSMutableString : NSString
22 @end
24 @interface NSNumber : NSObject <NSCopying>
25 @end
27 @interface NSArray<T> : NSObject <NSCopying> {
28 @public
29   T *data; // don't try this at home
31 - (T)objectAtIndexedSubscript:(int)index;
32 + (NSArray<T> *)array;
33 + (void)setArray:(NSArray <T> *)array;
34 @property (copy,nonatomic) T lastObject;
35 @end
37 @interface NSMutableArray<T> : NSArray<T>
38 -(instancetype)initWithArray:(NSArray<T> *)array; // expected-note{{passing argument}}
39 - (void)setObject:(T)object atIndexedSubscript:(int)index; // expected-note 2{{passing argument to parameter 'object' here}}
40 @end
42 @interface NSStringArray : NSArray<NSString *>
43 @end
45 @interface NSSet<T> : NSObject <NSCopying>
46 - (T)firstObject;
47 @property (nonatomic, copy) NSArray<T> *allObjects;
48 @end
50 // Parameterized inheritance (simple case)
51 @interface NSMutableSet<U : id<NSCopying>> : NSSet<U>
52 - (void)addObject:(U)object; // expected-note 7{{passing argument to parameter 'object' here}}
53 @end
55 @interface Widget : NSObject <NSCopying>
56 @end
58 // Non-parameterized class inheriting from a specialization of a
59 // parameterized class.
60 @interface WidgetSet : NSMutableSet<Widget *>
61 @end
63 // Parameterized inheritance with a more interesting transformation in
64 // the specialization.
65 @interface MutableSetOfArrays<T> : NSMutableSet<NSArray<T>*>
66 @end
68 // Inheriting from an unspecialized form of a parameterized type.
69 @interface UntypedMutableSet : NSMutableSet
70 @end
72 @interface Window : NSObject
73 @end
75 @interface NSDictionary<K, V> : NSObject <NSCopying>
76 - (V)objectForKeyedSubscript:(K)key; // expected-note 2{{parameter 'key'}}
77 @end
79 @interface NSMutableDictionary<K : id<NSCopying>, V> : NSDictionary<K, V>
80 - (void)setObject:(V)object forKeyedSubscript:(K)key;
81 // expected-note@-1 {{parameter 'object' here}}
82 // expected-note@-2 {{parameter 'object' here}}
83 // expected-note@-3 {{parameter 'key' here}}
84 // expected-note@-4 {{parameter 'key' here}}
86 @property (strong) K someRandomKey;
87 @end
89 @interface WindowArray : NSArray<Window *>
90 @end
92 @interface NSSet<T> (Searching)
93 - (T)findObject:(T)object;
94 @end
96 @interface NSView : NSObject
97 @end
99 @interface NSControl : NSView
100 - (void)toggle;
101 @end
103 @interface NSViewController<ViewType : NSView *> : NSObject
104 @property (nonatomic,retain) ViewType view;
105 @end
107 @interface TypedefTypeParam<T> : NSObject
108 typedef T AliasT;
109 - (void)test:(AliasT)object;
110 // expected-note@-1 {{parameter 'object' here}}
111 @end
113 // --------------------------------------------------------------------------
114 // Nullability
115 // --------------------------------------------------------------------------
116 typedef NSControl * _Nonnull Nonnull_NSControl;
118 @interface NSNullableTest<ViewType : NSView *> : NSObject
119 - (ViewType)view;
120 - (nullable ViewType)maybeView;
121 @end
123 @interface NSNullableTest2<ViewType : NSView * _Nullable> : NSObject // expected-error{{type parameter 'ViewType' bound 'NSView * _Nullable' cannot explicitly specify nullability}}
124 @end
126 void test_nullability(void) {
127   NSControl * _Nonnull nonnull_NSControl;
129   // Nullability introduced by substitution.
130   NSNullableTest<NSControl *> *unspecifiedControl;
131   nonnull_NSControl = [unspecifiedControl view];
132   nonnull_NSControl = [unspecifiedControl maybeView];  // expected-warning{{from nullable pointer 'NSControl * _Nullable' to non-nullable pointer type 'NSControl * _Nonnull'}}
134   // Nullability overridden by substitution.
135   NSNullableTest<Nonnull_NSControl> *nonnullControl;
136   nonnull_NSControl = [nonnullControl view];
137   nonnull_NSControl = [nonnullControl maybeView];  // expected-warning{{from nullable pointer 'Nonnull_NSControl _Nullable' (aka 'NSControl *') to non-nullable pointer type 'NSControl * _Nonnull'}}
139   // Nullability cannot be specified directly on a type argument.
140   NSNullableTest<NSControl * _Nonnull> *nonnullControl2; // expected-error{{type argument 'NSControl *' cannot explicitly specify nullability}}
143 // --------------------------------------------------------------------------
144 // Message sends.
145 // --------------------------------------------------------------------------
146 void test_message_send_result(
147        NSSet<NSString *> *stringSet,
148        NSMutableSet<NSString *> *mutStringSet,
149        WidgetSet *widgetSet,
150        UntypedMutableSet *untypedMutSet,
151        MutableSetOfArrays<NSString *> *mutStringArraySet,
152        NSSet *set,
153        NSMutableSet *mutSet,
154        MutableSetOfArrays *mutArraySet,
155        NSArray<NSString *> *stringArray,
156        NSArray<__kindof NSString *> *kindofStringArray,
157        void (^block)(void)) {
158   int *ip;
159   ip = [stringSet firstObject]; // expected-warning{{from 'NSString *'}}
160   ip = [mutStringSet firstObject]; // expected-warning{{from 'NSString *'}}
161   ip = [widgetSet firstObject]; // expected-warning{{from 'Widget *'}}
162   ip = [untypedMutSet firstObject]; // expected-warning{{from 'id'}}
163   ip = [mutStringArraySet firstObject]; // expected-warning{{from 'NSArray<NSString *> *'}}
164   ip = [set firstObject]; // expected-warning{{from 'id'}}
165   ip = [mutSet firstObject]; // expected-warning{{from 'id'}}
166   ip = [mutArraySet firstObject]; // expected-warning{{from 'id'}}
167   ip = [block firstObject]; // expected-warning{{from 'id'}}
169   ip = [stringSet findObject:@"blah"]; // expected-warning{{from 'NSString *'}}
171   // Class messages.
172   ip = [NSSet<NSString *> alloc]; // expected-warning{{from 'NSSet<NSString *> *'}}
173   ip = [NSSet alloc]; // expected-warning{{from 'NSSet *'}}
174   ip = [MutableSetOfArrays<NSString *> alloc]; // expected-warning{{from 'MutableSetOfArrays<NSString *> *'}}
175   ip = [MutableSetOfArrays alloc];  // expected-warning{{from 'MutableSetOfArrays *'}}
176   ip = [NSArray<NSString *> array]; // expected-warning{{from 'NSArray<NSString *> *'}}
177   ip = [NSArray<NSString *><NSCopying> array]; // expected-warning{{from 'NSArray<NSString *> *'}}
179   ip = [[NSMutableArray<NSString *> alloc] init];  // expected-warning{{from 'NSMutableArray<NSString *> *'}}
181   [[NSMutableArray alloc] initWithArray: stringArray]; // okay
182   [[NSMutableArray<NSString *> alloc] initWithArray: stringArray]; // okay
183   [[NSMutableArray<NSNumber *> alloc] initWithArray: stringArray]; // expected-warning{{sending 'NSArray<NSString *> *' to parameter of type 'NSArray<NSNumber *> *'}}
185   ip = [[[NSViewController alloc] init] view]; // expected-warning{{from '__kindof NSView *'}}
186   [[[[NSViewController alloc] init] view] toggle];
188   NSMutableString *mutStr = kindofStringArray[0];
189   NSNumber *number = kindofStringArray[0]; // expected-warning{{of type '__kindof NSString *'}}
192 void test_message_send_param(
193        NSMutableSet<NSString *> *mutStringSet,
194        WidgetSet *widgetSet,
195        UntypedMutableSet *untypedMutSet,
196        MutableSetOfArrays<NSString *> *mutStringArraySet,
197        NSMutableSet *mutSet,
198        MutableSetOfArrays *mutArraySet,
199        TypedefTypeParam<NSString *> *typedefTypeParam,
200        void (^block)(void)) {
201   Window *window;
203   [mutStringSet addObject: window]; // expected-warning{{parameter of type 'NSString *'}}
204   [widgetSet addObject: window]; // expected-warning{{parameter of type 'Widget *'}}
205   [untypedMutSet addObject: window]; // expected-warning{{parameter of incompatible type 'id<NSCopying>'}}
206   [mutStringArraySet addObject: window]; // expected-warning{{parameter of type 'NSArray<NSString *> *'}}
207   [mutSet addObject: window]; // expected-warning{{parameter of incompatible type 'id<NSCopying>'}}
208   [mutArraySet addObject: window]; // expected-warning{{parameter of incompatible type 'id<NSCopying>'}}
209   [typedefTypeParam test: window]; // expected-warning{{parameter of type 'NSString *'}}
210   [block addObject: window]; // expected-warning{{parameter of incompatible type 'id<NSCopying>'}}
213 // --------------------------------------------------------------------------
214 // Property accesses.
215 // --------------------------------------------------------------------------
216 void test_property_read(
217        NSSet<NSString *> *stringSet,
218        NSMutableSet<NSString *> *mutStringSet,
219        WidgetSet *widgetSet,
220        UntypedMutableSet *untypedMutSet,
221        MutableSetOfArrays<NSString *> *mutStringArraySet,
222        NSSet *set,
223        NSMutableSet *mutSet,
224        MutableSetOfArrays *mutArraySet,
225        NSMutableDictionary *mutDict) {
226   int *ip;
227   ip = stringSet.allObjects; // expected-warning{{from 'NSArray<NSString *> *'}}
228   ip = mutStringSet.allObjects; // expected-warning{{from 'NSArray<NSString *> *'}}
229   ip = widgetSet.allObjects; // expected-warning{{from 'NSArray<Widget *> *'}}
230   ip = untypedMutSet.allObjects; // expected-warning{{from 'NSArray *'}}
231   ip = mutStringArraySet.allObjects; // expected-warning{{from 'NSArray<NSArray<NSString *> *> *'}}
232   ip = set.allObjects; // expected-warning{{from 'NSArray *'}}
233   ip = mutSet.allObjects; // expected-warning{{from 'NSArray *'}}
234   ip = mutArraySet.allObjects; // expected-warning{{from 'NSArray *'}}
236   ip = mutDict.someRandomKey; // expected-warning{{from '__kindof id<NSCopying>'}}
238   ip = [[NSViewController alloc] init].view; // expected-warning{{from '__kindof NSView *'}}
241 void test_property_write(
242        NSMutableSet<NSString *> *mutStringSet,
243        WidgetSet *widgetSet,
244        UntypedMutableSet *untypedMutSet,
245        MutableSetOfArrays<NSString *> *mutStringArraySet,
246        NSMutableSet *mutSet,
247        MutableSetOfArrays *mutArraySet,
248        NSMutableDictionary *mutDict) {
249   int *ip;
251   mutStringSet.allObjects = ip; // expected-warning{{to 'NSArray<NSString *> *'}}
252   widgetSet.allObjects = ip; // expected-warning{{to 'NSArray<Widget *> *'}}
253   untypedMutSet.allObjects = ip; // expected-warning{{to 'NSArray *'}}
254   mutStringArraySet.allObjects = ip; // expected-warning{{to 'NSArray<NSArray<NSString *> *> *'}}
255   mutSet.allObjects = ip; // expected-warning{{to 'NSArray *'}}
256   mutArraySet.allObjects = ip; // expected-warning{{to 'NSArray *'}}
258   mutDict.someRandomKey = ip; // expected-warning{{to 'id<NSCopying>'}}
261 // --------------------------------------------------------------------------
262 // Subscripting
263 // --------------------------------------------------------------------------
264 void test_subscripting(
265        NSArray<NSString *> *stringArray,
266        NSMutableArray<NSString *> *mutStringArray,
267        NSArray *array,
268        NSMutableArray *mutArray,
269        NSDictionary<NSString *, Widget *> *stringWidgetDict,
270        NSMutableDictionary<NSString *, Widget *> *mutStringWidgetDict,
271        NSDictionary *dict,
272        NSMutableDictionary *mutDict) {
273   int *ip;
274   NSString *string;
275   Widget *widget;
276   Window *window;
278   ip = stringArray[0]; // expected-warning{{from 'NSString *'}}
280   ip = mutStringArray[0]; // expected-warning{{from 'NSString *'}}
281   mutStringArray[0] = ip; // expected-warning{{parameter of type 'NSString *'}}
283   ip = array[0]; // expected-warning{{from 'id'}}
285   ip = mutArray[0]; // expected-warning{{from 'id'}}
286   mutArray[0] = ip; // expected-warning{{parameter of type 'id'}}
288   ip = stringWidgetDict[string]; // expected-warning{{from 'Widget *'}}
289   widget = stringWidgetDict[widget]; // expected-warning{{to parameter of type 'NSString *'}}
291   ip = mutStringWidgetDict[string]; // expected-warning{{from 'Widget *'}}
292   widget = mutStringWidgetDict[widget]; // expected-warning{{to parameter of type 'NSString *'}}
293   mutStringWidgetDict[string] = ip; // expected-warning{{to parameter of type 'Widget *'}}
294   mutStringWidgetDict[widget] = widget; // expected-warning{{to parameter of type 'NSString *'}}
296   ip = dict[string]; // expected-warning{{from 'id'}}
298   ip = mutDict[string]; // expected-warning{{from 'id'}}
299   mutDict[string] = ip; // expected-warning{{to parameter of type 'id'}}
301   widget = mutDict[window];
302   mutDict[window] = widget; // expected-warning{{parameter of incompatible type 'id<NSCopying>'}}
305 // --------------------------------------------------------------------------
306 // Instance variable access.
307 // --------------------------------------------------------------------------
308 void test_instance_variable(NSArray<NSString *> *stringArray,
309                             NSArray *array) {
310   int *ip;
312   ip = stringArray->data; // expected-warning{{from 'NSString **'}}
313   ip = array->data; // expected-warning{{from 'id *'}}
316 @implementation WindowArray
317 - (void)testInstanceVariable {
318   int *ip;
320   ip = data; // expected-warning{{from 'Window **'}}
322 @end
324 // --------------------------------------------------------------------------
325 // Implicit conversions.
326 // --------------------------------------------------------------------------
327 void test_implicit_conversions(NSArray<NSString *> *stringArray,
328                                NSArray<NSNumber *> *numberArray,
329                                NSMutableArray<NSString *> *mutStringArray,
330                                NSArray *array,
331                                NSMutableArray *mutArray) {
332   // Specialized -> unspecialized (same level)
333   array = stringArray;
335   // Unspecialized -> specialized (same level)
336   stringArray = array;
338   // Specialized -> specialized failure (same level).
339   stringArray = numberArray; // expected-warning{{incompatible pointer types assigning to 'NSArray<NSString *> *' from 'NSArray<NSNumber *> *'}}
341   // Specialized -> specialized (different levels).
342   stringArray = mutStringArray;
344   // Specialized -> specialized failure (different levels).
345   numberArray = mutStringArray; // expected-warning{{incompatible pointer types assigning to 'NSArray<NSNumber *> *' from 'NSMutableArray<NSString *> *'}}
347   // Unspecialized -> specialized (different levels).
348   stringArray = mutArray;
350   // Specialized -> unspecialized (different levels).
351   array = mutStringArray;
354 @interface NSCovariant1<__covariant T>
355 @end
357 @interface NSContravariant1<__contravariant T>
358 @end
360 void test_variance(NSCovariant1<NSString *> *covariant1,
361                    NSCovariant1<NSMutableString *> *covariant2,
362                    NSCovariant1<NSString *(^)(void)> *covariant3,
363                    NSCovariant1<NSMutableString *(^)(void)> *covariant4,
364                    NSCovariant1<id> *covariant5,
365                    NSCovariant1<id<NSCopying>> *covariant6,
366                    NSContravariant1<NSString *> *contravariant1,
367                    NSContravariant1<NSMutableString *> *contravariant2) {
368   covariant1 = covariant2; // okay
369   covariant2 = covariant1; // expected-warning{{incompatible pointer types assigning to 'NSCovariant1<NSMutableString *> *' from 'NSCovariant1<NSString *> *'}}
371   covariant3 = covariant4; // okay
372   covariant4 = covariant3; // expected-warning{{incompatible pointer types assigning to 'NSCovariant1<NSMutableString *(^)(void)> *' from 'NSCovariant1<NSString *(^)(void)> *'}}
374   covariant5 = covariant1; // okay
375   covariant1 = covariant5; // okay: id is promiscuous
377   covariant5 = covariant3; // okay
378   covariant3 = covariant5; // okay
380   contravariant1 = contravariant2; // expected-warning{{incompatible pointer types assigning to 'NSContravariant1<NSString *> *' from 'NSContravariant1<NSMutableString *> *'}}
381   contravariant2 = contravariant1; // okay
384 // --------------------------------------------------------------------------
385 // Ternary operator
386 // --------------------------------------------------------------------------
387 void test_ternary_operator(NSArray<NSString *> *stringArray,
388                            NSArray<NSNumber *> *numberArray,
389                            NSMutableArray<NSString *> *mutStringArray,
390                            NSStringArray *stringArray2,
391                            NSArray *array,
392                            NSMutableArray *mutArray,
393                            int cond) {
394   int *ip;
395   id object;
397   ip = cond ? stringArray : mutStringArray; // expected-warning{{from 'NSArray<NSString *> *'}}
398   ip = cond ? mutStringArray : stringArray; // expected-warning{{from 'NSArray<NSString *> *'}}
400   ip = cond ? stringArray2 : mutStringArray; // expected-warning{{from 'NSArray<NSString *> *'}}
401   ip = cond ? mutStringArray : stringArray2; // expected-warning{{from 'NSArray<NSString *> *'}}
403   ip = cond ? stringArray : mutArray; // expected-warning{{from 'NSArray *'}}
405   ip = cond ? stringArray2 : mutArray; // expected-warning{{from 'NSArray *'}}
407   ip = cond ? mutArray : stringArray; // expected-warning{{from 'NSArray *'}}
409   ip = cond ? mutArray : stringArray2; // expected-warning{{from 'NSArray *'}}
411   object = cond ? stringArray : numberArray; // expected-warning{{incompatible operand types ('NSArray<NSString *> *' and 'NSArray<NSNumber *> *')}}
414 // --------------------------------------------------------------------------
415 // super
416 // --------------------------------------------------------------------------
417 @implementation NSStringArray
418 - (void)useSuperMethod {
419   int *ip;
420   ip = super.lastObject; // expected-warning{{from 'NSString *'}}
421   super.lastObject = ip; // expected-warning{{to 'NSString *'}}
422   ip = [super objectAtIndexedSubscript:0]; // expected-warning{{from 'NSString *'}}
425 + (void)useSuperMethod {
426   int *ip;
427   ip = super.array; // expected-warning{{from 'NSArray<NSString *> *'}}
428   super.array = ip; // expected-warning{{to 'NSArray<NSString *> *'}}
429   ip = [super array]; // expected-warning{{from 'NSArray<NSString *> *'}}
431 @end
433 // --------------------------------------------------------------------------
434 // warning about likely protocol/class name typos.
435 // --------------------------------------------------------------------------
436 typedef NSArray<NSObject> ArrayOfNSObjectWarning; // expected-warning{{parameterized class 'NSArray' already conforms to the protocols listed; did you forget a '*'?}}
438 @interface MyMutableDictionary<KeyType, ObjectType> : NSObject
439 - (void)setObject:(ObjectType)obj forKeyedSubscript:(KeyType <NSCopying>)key; // expected-note{{passing argument to parameter 'obj' here}} \
440     // expected-note{{passing argument to parameter 'key' here}}
441 @end
443 void bar(MyMutableDictionary<NSString *, NSString *> *stringsByString,
444                              NSNumber *n1, NSNumber *n2) {
445   // We warn here when the key types do not match.
446   stringsByString[n1] = n2; // expected-warning{{incompatible pointer types sending 'NSNumber *' to parameter of type 'NSString *'}} \
447     // expected-warning{{incompatible pointer types sending 'NSNumber *' to parameter of type 'NSString<NSCopying> *'}}
450 @interface MyTest<K, V> : NSObject <NSCopying>
451 - (V)test:(K)key;
452 - (V)test2:(K)key; // expected-note{{previous definition is here}}
453 - (void)mapUsingBlock:(id (^)(V))block;
454 - (void)mapUsingBlock2:(id (^)(V))block; // expected-note{{previous definition is here}}
455 @end
457 @implementation MyTest
458 - (id)test:(id)key {
459   return key;
461 - (int)test2:(id)key{ // expected-warning{{conflicting return type in implementation}}
462   return 0;
464 - (void)mapUsingBlock:(id (^)(id))block {
466 - (void)mapUsingBlock2:(id)block { // expected-warning{{conflicting parameter types in implementation}}
468 @end
470 // --------------------------------------------------------------------------
471 // Use a type parameter as a type argument.
472 // --------------------------------------------------------------------------
473 // Type bounds in a category/extension are omitted.
474 @interface ParameterizedContainer<T : id<NSCopying>>
475 - (ParameterizedContainer<T> *)inInterface;
476 @end
477 @interface ParameterizedContainer<T> (Cat)
478 - (ParameterizedContainer<T> *)inCategory;
479 @end
480 @interface ParameterizedContainer<U> ()
481 - (ParameterizedContainer<U> *)inExtension;
482 @end