| 1 | // RUN: %clang_cc1 -fblocks -fsyntax-only -std=c++11 %s -verify |
| 2 | // |
| 3 | // Test the substitution of type arguments for type parameters when |
| 4 | // using parameterized classes in Objective-C. |
| 5 | |
| 6 | __attribute__((objc_root_class)) |
| 7 | @interface NSObject |
| 8 | + (instancetype)alloc; |
| 9 | - (instancetype)init; |
| 10 | @end |
| 11 | |
| 12 | @protocol NSCopying |
| 13 | @end |
| 14 | |
| 15 | @interface NSString : NSObject <NSCopying> |
| 16 | @end |
| 17 | |
| 18 | @interface NSMutableString : NSString |
| 19 | @end |
| 20 | |
| 21 | @interface NSNumber : NSObject <NSCopying> |
| 22 | @end |
| 23 | |
| 24 | @interface NSArray<T> : NSObject <NSCopying> { |
| 25 | @public |
| 26 | T *data; // don't try this at home |
| 27 | } |
| 28 | - (T)objectAtIndexedSubscript:(int)index; |
| 29 | + (NSArray<T> *)array; |
| 30 | @property (copy,nonatomic) T lastObject; |
| 31 | @end |
| 32 | |
| 33 | @interface NSMutableArray<T> : NSArray<T> |
| 34 | -(instancetype)initWithArray:(NSArray<T> *)array; // expected-note{{passing argument}} |
| 35 | - (void)setObject:(T)object atIndexedSubscript:(int)index; // expected-note 2{{passing argument to parameter 'object' here}} |
| 36 | @end |
| 37 | |
| 38 | @interface NSStringArray : NSArray<NSString *> |
| 39 | @end |
| 40 | |
| 41 | @interface NSSet<T> : NSObject <NSCopying> |
| 42 | - (T)firstObject; |
| 43 | @property (nonatomic, copy) NSArray<T> *allObjects; |
| 44 | @end |
| 45 | |
| 46 | // Parameterized inheritance (simple case) |
| 47 | @interface NSMutableSet<U : id<NSCopying>> : NSSet<U> |
| 48 | - (void)addObject:(U)object; // expected-note 7{{passing argument to parameter 'object' here}} |
| 49 | @end |
| 50 | |
| 51 | @interface Widget : NSObject <NSCopying> |
| 52 | @end |
| 53 | |
| 54 | // Non-parameterized class inheriting from a specialization of a |
| 55 | // parameterized class. |
| 56 | @interface WidgetSet : NSMutableSet<Widget *> |
| 57 | @end |
| 58 | |
| 59 | // Parameterized inheritance with a more interesting transformation in |
| 60 | // the specialization. |
| 61 | @interface MutableSetOfArrays<T> : NSMutableSet<NSArray<T>*> |
| 62 | @end |
| 63 | |
| 64 | // Inheriting from an unspecialized form of a parameterized type. |
| 65 | @interface UntypedMutableSet : NSMutableSet |
| 66 | @end |
| 67 | |
| 68 | @interface Window : NSObject |
| 69 | @end |
| 70 | |
| 71 | @interface NSDictionary<K, V> : NSObject <NSCopying> |
| 72 | - (V)objectForKeyedSubscript:(K)key; // expected-note 2{{parameter 'key'}} |
| 73 | @end |
| 74 | |
| 75 | @interface NSMutableDictionary<K : id<NSCopying>, V> : NSDictionary<K, V> // expected-note 2{{type parameter 'K' declared here}} \ |
| 76 | // expected-note 2{{'NSMutableDictionary' declared here}} |
| 77 | - (void)setObject:(V)object forKeyedSubscript:(K)key; |
| 78 | // expected-note@-1 {{parameter 'object' here}} |
| 79 | // expected-note@-2 {{parameter 'object' here}} |
| 80 | // expected-note@-3 {{parameter 'key' here}} |
| 81 | // expected-note@-4 {{parameter 'key' here}} |
| 82 | |
| 83 | @property (strong) K someRandomKey; |
| 84 | @end |
| 85 | |
| 86 | @interface WindowArray : NSArray<Window *> |
| 87 | @end |
| 88 | |
| 89 | @interface NSSet<T> (Searching) |
| 90 | - (T)findObject:(T)object; |
| 91 | @end |
| 92 | |
| 93 | |
| 94 | // -------------------------------------------------------------------------- |
| 95 | // Message sends. |
| 96 | // -------------------------------------------------------------------------- |
| 97 | void test_message_send_result( |
| 98 | NSSet<NSString *> *stringSet, |
| 99 | NSMutableSet<NSString *> *mutStringSet, |
| 100 | WidgetSet *widgetSet, |
| 101 | UntypedMutableSet *untypedMutSet, |
| 102 | MutableSetOfArrays<NSString *> *mutStringArraySet, |
| 103 | NSSet *set, |
| 104 | NSMutableSet *mutSet, |
| 105 | MutableSetOfArrays *mutArraySet, |
| 106 | NSArray<NSString *> *stringArray, |
| 107 | void (^block)(void)) { |
| 108 | int *ip; |
| 109 | ip = [stringSet firstObject]; // expected-error{{from incompatible type 'NSString *'}} |
| 110 | ip = [mutStringSet firstObject]; // expected-error{{from incompatible type 'NSString *'}} |
| 111 | ip = [widgetSet firstObject]; // expected-error{{from incompatible type 'Widget *'}} |
| 112 | ip = [untypedMutSet firstObject]; // expected-error{{from incompatible type 'id'}} |
| 113 | ip = [mutStringArraySet firstObject]; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 114 | ip = [set firstObject]; // expected-error{{from incompatible type 'id'}} |
| 115 | ip = [mutSet firstObject]; // expected-error{{from incompatible type 'id'}} |
| 116 | ip = [mutArraySet firstObject]; // expected-error{{from incompatible type 'id'}} |
| 117 | ip = [block firstObject]; // expected-error{{from incompatible type 'id'}} |
| 118 | |
| 119 | ip = [stringSet findObject:@"blah"]; // expected-error{{from incompatible type 'NSString *'}} |
| 120 | |
| 121 | // Class messages. |
| 122 | ip = [NSSet<NSString *> alloc]; // expected-error{{from incompatible type 'NSSet<NSString *> *'}} |
| 123 | ip = [NSSet alloc]; // expected-error{{from incompatible type 'NSSet *'}} |
| 124 | ip = [MutableSetOfArrays<NSString *> alloc]; // expected-error{{from incompatible type 'MutableSetOfArrays<NSString *> *'}} |
| 125 | ip = [MutableSetOfArrays alloc]; // expected-error{{from incompatible type 'MutableSetOfArrays *'}} |
| 126 | ip = [NSArray<NSString *> array]; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 127 | ip = [NSArray<NSString *><NSCopying> array]; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 128 | |
| 129 | ip = [[NSMutableArray<NSString *> alloc] init]; // expected-error{{from incompatible type 'NSMutableArray<NSString *> *'}} |
| 130 | |
| 131 | [[NSMutableArray alloc] initWithArray: stringArray]; // okay |
| 132 | [[NSMutableArray<NSString *> alloc] initWithArray: stringArray]; // okay |
| 133 | [[NSMutableArray<NSNumber *> alloc] initWithArray: stringArray]; // expected-error{{parameter of type 'NSArray<NSNumber *> *' with an lvalue of type 'NSArray<NSString *> *'}} |
| 134 | } |
| 135 | |
| 136 | void test_message_send_param( |
| 137 | NSMutableSet<NSString *> *mutStringSet, |
| 138 | WidgetSet *widgetSet, |
| 139 | UntypedMutableSet *untypedMutSet, |
| 140 | MutableSetOfArrays<NSString *> *mutStringArraySet, |
| 141 | NSMutableSet *mutSet, |
| 142 | MutableSetOfArrays *mutArraySet, |
| 143 | void (^block)(void)) { |
| 144 | Window *window; |
| 145 | |
| 146 | [mutStringSet addObject: window]; // expected-error{{parameter of type 'NSString *'}} |
| 147 | [widgetSet addObject: window]; // expected-error{{parameter of type 'Widget *'}} |
| 148 | [untypedMutSet addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}} |
| 149 | [mutStringArraySet addObject: window]; // expected-error{{parameter of type 'NSArray<NSString *> *'}} |
| 150 | [mutSet addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}} |
| 151 | [mutArraySet addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}} |
| 152 | [block addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}} |
| 153 | } |
| 154 | |
| 155 | // -------------------------------------------------------------------------- |
| 156 | // Property accesses. |
| 157 | // -------------------------------------------------------------------------- |
| 158 | void test_property_read( |
| 159 | NSSet<NSString *> *stringSet, |
| 160 | NSMutableSet<NSString *> *mutStringSet, |
| 161 | WidgetSet *widgetSet, |
| 162 | UntypedMutableSet *untypedMutSet, |
| 163 | MutableSetOfArrays<NSString *> *mutStringArraySet, |
| 164 | NSSet *set, |
| 165 | NSMutableSet *mutSet, |
| 166 | MutableSetOfArrays *mutArraySet, |
| 167 | NSMutableDictionary *mutDict) { |
| 168 | int *ip; |
| 169 | ip = stringSet.allObjects; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 170 | ip = mutStringSet.allObjects; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 171 | ip = widgetSet.allObjects; // expected-error{{from incompatible type 'NSArray<Widget *> *'}} |
| 172 | ip = untypedMutSet.allObjects; // expected-error{{from incompatible type 'NSArray *'}} |
| 173 | ip = mutStringArraySet.allObjects; // expected-error{{from incompatible type 'NSArray<NSArray<NSString *> *> *'}} |
| 174 | ip = set.allObjects; // expected-error{{from incompatible type 'NSArray *'}} |
| 175 | ip = mutSet.allObjects; // expected-error{{from incompatible type 'NSArray *'}} |
| 176 | ip = mutArraySet.allObjects; // expected-error{{from incompatible type 'NSArray *'}} |
| 177 | |
| 178 | ip = mutDict.someRandomKey; // expected-error{{from incompatible type '__kindof id<NSCopying>'}} |
| 179 | } |
| 180 | |
| 181 | void test_property_write( |
| 182 | NSMutableSet<NSString *> *mutStringSet, |
| 183 | WidgetSet *widgetSet, |
| 184 | UntypedMutableSet *untypedMutSet, |
| 185 | MutableSetOfArrays<NSString *> *mutStringArraySet, |
| 186 | NSMutableSet *mutSet, |
| 187 | MutableSetOfArrays *mutArraySet, |
| 188 | NSMutableDictionary *mutDict) { |
| 189 | int *ip; |
| 190 | |
| 191 | mutStringSet.allObjects = ip; // expected-error{{to 'NSArray<NSString *> *'}} |
| 192 | widgetSet.allObjects = ip; // expected-error{{to 'NSArray<Widget *> *'}} |
| 193 | untypedMutSet.allObjects = ip; // expected-error{{to 'NSArray *'}} |
| 194 | mutStringArraySet.allObjects = ip; // expected-error{{to 'NSArray<NSArray<NSString *> *> *'}} |
| 195 | mutSet.allObjects = ip; // expected-error{{to 'NSArray *'}} |
| 196 | mutArraySet.allObjects = ip; // expected-error{{to 'NSArray *'}} |
| 197 | |
| 198 | mutDict.someRandomKey = ip; // expected-error{{to 'id<NSCopying>'}} |
| 199 | } |
| 200 | |
| 201 | // -------------------------------------------------------------------------- |
| 202 | // Subscripting |
| 203 | // -------------------------------------------------------------------------- |
| 204 | void test_subscripting( |
| 205 | NSArray<NSString *> *stringArray, |
| 206 | NSMutableArray<NSString *> *mutStringArray, |
| 207 | NSArray *array, |
| 208 | NSMutableArray *mutArray, |
| 209 | NSDictionary<NSString *, Widget *> *stringWidgetDict, |
| 210 | NSMutableDictionary<NSString *, Widget *> *mutStringWidgetDict, |
| 211 | NSDictionary *dict, |
| 212 | NSMutableDictionary *mutDict) { |
| 213 | int *ip; |
| 214 | NSString *string; |
| 215 | Widget *widget; |
| 216 | Window *window; |
| 217 | |
| 218 | ip = stringArray[0]; // expected-error{{from incompatible type 'NSString *'}} |
| 219 | |
| 220 | ip = mutStringArray[0]; // expected-error{{from incompatible type 'NSString *'}} |
| 221 | mutStringArray[0] = ip; // expected-error{{parameter of type 'NSString *'}} |
| 222 | |
| 223 | ip = array[0]; // expected-error{{from incompatible type 'id'}} |
| 224 | |
| 225 | ip = mutArray[0]; // expected-error{{from incompatible type 'id'}} |
| 226 | mutArray[0] = ip; // expected-error{{parameter of type 'id'}} |
| 227 | |
| 228 | ip = stringWidgetDict[string]; // expected-error{{from incompatible type 'Widget *'}} |
| 229 | widget = stringWidgetDict[widget]; // expected-error{{parameter of type 'NSString *'}} |
| 230 | |
| 231 | ip = mutStringWidgetDict[string]; // expected-error{{from incompatible type 'Widget *'}} |
| 232 | widget = mutStringWidgetDict[widget]; // expected-error{{parameter of type 'NSString *'}} |
| 233 | mutStringWidgetDict[string] = ip; // expected-error{{parameter of type 'Widget *'}} |
| 234 | mutStringWidgetDict[widget] = widget; // expected-error{{parameter of type 'NSString *'}} |
| 235 | |
| 236 | ip = dict[string]; // expected-error{{from incompatible type 'id'}} |
| 237 | |
| 238 | ip = mutDict[string]; // expected-error{{incompatible type 'id'}} |
| 239 | mutDict[string] = ip; // expected-error{{parameter of type 'id'}} |
| 240 | |
| 241 | widget = mutDict[window]; |
| 242 | mutDict[window] = widget; // expected-error{{parameter of type 'id<NSCopying>'}} |
| 243 | } |
| 244 | |
| 245 | // -------------------------------------------------------------------------- |
| 246 | // Instance variable access. |
| 247 | // -------------------------------------------------------------------------- |
| 248 | void test_instance_variable(NSArray<NSString *> *stringArray, |
| 249 | NSArray *array) { |
| 250 | int *ip; |
| 251 | |
| 252 | ip = stringArray->data; // expected-error{{from incompatible type 'NSString **'}} |
| 253 | ip = array->data; // expected-error{{from incompatible type 'id *'}} |
| 254 | } |
| 255 | |
| 256 | @implementation WindowArray |
| 257 | - (void)testInstanceVariable { |
| 258 | int *ip; |
| 259 | |
| 260 | ip = data; // expected-error{{from incompatible type 'Window **'}} |
| 261 | } |
| 262 | @end |
| 263 | |
| 264 | // -------------------------------------------------------------------------- |
| 265 | // Implicit conversions. |
| 266 | // -------------------------------------------------------------------------- |
| 267 | void test_implicit_conversions(NSArray<NSString *> *stringArray, |
| 268 | NSArray<NSNumber *> *numberArray, |
| 269 | NSMutableArray<NSString *> *mutStringArray, |
| 270 | NSArray *array, |
| 271 | NSMutableArray *mutArray) { |
| 272 | // Specialized -> unspecialized (same level) |
| 273 | array = stringArray; |
| 274 | |
| 275 | // Unspecialized -> specialized (same level) |
| 276 | stringArray = array; |
| 277 | |
| 278 | // Specialized -> specialized failure (same level). |
| 279 | stringArray = numberArray; // expected-error{{assigning to 'NSArray<NSString *> *' from incompatible type 'NSArray<NSNumber *> *'}} |
| 280 | |
| 281 | // Specialized -> specialized (different levels). |
| 282 | stringArray = mutStringArray; |
| 283 | |
| 284 | // Specialized -> specialized failure (different levels). |
| 285 | numberArray = mutStringArray; // expected-error{{assigning to 'NSArray<NSNumber *> *' from incompatible type 'NSMutableArray<NSString *> *'}} |
| 286 | |
| 287 | // Unspecialized -> specialized (different levels). |
| 288 | stringArray = mutArray; |
| 289 | |
| 290 | // Specialized -> unspecialized (different levels). |
| 291 | array = mutStringArray; |
| 292 | } |
| 293 | |
| 294 | @interface NSCovariant1<__covariant T> |
| 295 | @end |
| 296 | |
| 297 | @interface NSContravariant1<__contravariant T> |
| 298 | @end |
| 299 | |
| 300 | void test_variance(NSCovariant1<NSString *> *covariant1, |
| 301 | NSCovariant1<NSMutableString *> *covariant2, |
| 302 | NSCovariant1<NSString *(^)(void)> *covariant3, |
| 303 | NSCovariant1<NSMutableString *(^)(void)> *covariant4, |
| 304 | NSCovariant1<id> *covariant5, |
| 305 | NSCovariant1<id<NSCopying>> *covariant6, |
| 306 | NSContravariant1<NSString *> *contravariant1, |
| 307 | NSContravariant1<NSMutableString *> *contravariant2) { |
| 308 | covariant1 = covariant2; // okay |
| 309 | covariant2 = covariant1; // expected-warning{{incompatible pointer types assigning to 'NSCovariant1<NSMutableString *> *' from 'NSCovariant1<NSString *> *'}} |
| 310 | |
| 311 | covariant3 = covariant4; // okay |
| 312 | covariant4 = covariant3; // expected-warning{{incompatible pointer types assigning to 'NSCovariant1<NSMutableString *(^)()> *' from 'NSCovariant1<NSString *(^)()> *'}} |
| 313 | |
| 314 | covariant5 = covariant1; // okay |
| 315 | covariant1 = covariant5; // okay: id is promiscuous |
| 316 | |
| 317 | covariant5 = covariant3; // okay |
| 318 | covariant3 = covariant5; // okay |
| 319 | |
| 320 | contravariant1 = contravariant2; // expected-warning{{incompatible pointer types assigning to 'NSContravariant1<NSString *> *' from 'NSContravariant1<NSMutableString *> *'}} |
| 321 | contravariant2 = contravariant1; // okay |
| 322 | } |
| 323 | |
| 324 | // -------------------------------------------------------------------------- |
| 325 | // Ternary operator |
| 326 | // -------------------------------------------------------------------------- |
| 327 | void test_ternary_operator(NSArray<NSString *> *stringArray, |
| 328 | NSArray<NSNumber *> *numberArray, |
| 329 | NSMutableArray<NSString *> *mutStringArray, |
| 330 | NSStringArray *stringArray2, |
| 331 | NSArray *array, |
| 332 | NSMutableArray *mutArray, |
| 333 | int cond) { |
| 334 | int *ip; |
| 335 | id object; |
| 336 | |
| 337 | ip = cond ? stringArray : mutStringArray; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 338 | ip = cond ? mutStringArray : stringArray; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 339 | |
| 340 | ip = cond ? stringArray2 : mutStringArray; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 341 | ip = cond ? mutStringArray : stringArray2; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 342 | |
| 343 | ip = cond ? stringArray : mutArray; // expected-error{{from incompatible type 'NSArray *'}} |
| 344 | |
| 345 | ip = cond ? stringArray2 : mutArray; // expected-error{{from incompatible type 'NSArray *'}} |
| 346 | |
| 347 | ip = cond ? mutArray : stringArray; // expected-error{{from incompatible type 'NSArray *'}} |
| 348 | |
| 349 | ip = cond ? mutArray : stringArray2; // expected-error{{from incompatible type 'NSArray *'}} |
| 350 | |
| 351 | object = cond ? stringArray : numberArray; // expected-warning{{incompatible operand types ('NSArray<NSString *> *' and 'NSArray<NSNumber *> *')}} |
| 352 | } |
| 353 | |
| 354 | // -------------------------------------------------------------------------- |
| 355 | // super |
| 356 | // -------------------------------------------------------------------------- |
| 357 | @implementation NSStringArray |
| 358 | - (void)useSuperMethod { |
| 359 | int *ip; |
| 360 | ip = super.lastObject; // expected-error{{from incompatible type 'NSString *'}} |
| 361 | ip = [super objectAtIndexedSubscript:0]; // expected-error{{from incompatible type 'NSString *'}} |
| 362 | } |
| 363 | |
| 364 | + (void)useSuperMethod { |
| 365 | int *ip; |
| 366 | ip = super.array; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 367 | ip = [super array]; // expected-error{{from incompatible type 'NSArray<NSString *> *'}} |
| 368 | } |
| 369 | @end |
| 370 | |
| 371 | // -------------------------------------------------------------------------- |
| 372 | // Template instantiation |
| 373 | // -------------------------------------------------------------------------- |
| 374 | template<typename K, typename V> |
| 375 | struct NSMutableDictionaryOf { |
| 376 | typedef NSMutableDictionary<K, V> *type; // expected-error{{type argument 'NSObject *' does not satisfy the bound ('id<NSCopying>') of type parameter 'K'}} |
| 377 | }; |
| 378 | |
| 379 | template<typename ...Args> |
| 380 | struct VariadicNSMutableDictionaryOf { |
| 381 | typedef NSMutableDictionary<Args...> *type; // expected-error{{type argument 'NSObject *' does not satisfy the bound ('id<NSCopying>') of type parameter 'K'}} |
| 382 | // expected-error@-1{{too many type arguments for class 'NSMutableDictionary' (have 3, expected 2)}} |
| 383 | // expected-error@-2{{too few type arguments for class 'NSMutableDictionary' (have 1, expected 2)}} |
| 384 | }; |
| 385 | |
| 386 | void testInstantiation() { |
| 387 | int *ip; |
| 388 | |
| 389 | typedef NSMutableDictionaryOf<NSString *, NSObject *>::type Dict1; |
| 390 | Dict1 d1 = ip; // expected-error{{cannot initialize a variable of type 'Dict1' (aka 'NSMutableDictionary<NSString *,NSObject *> *')}} |
| 391 | |
| 392 | typedef NSMutableDictionaryOf<NSObject *, NSString *>::type Dict2; // expected-note{{in instantiation of template}} |
| 393 | } |
| 394 | |
| 395 | void testVariadicInstantiation() { |
| 396 | int *ip; |
| 397 | |
| 398 | typedef VariadicNSMutableDictionaryOf<NSString *, NSObject *>::type Dict1; |
| 399 | Dict1 d1 = ip; // expected-error{{cannot initialize a variable of type 'Dict1' (aka 'NSMutableDictionary<NSString *,NSObject *> *')}} |
| 400 | |
| 401 | typedef VariadicNSMutableDictionaryOf<NSObject *, NSString *>::type Dict2; // expected-note{{in instantiation of template}} |
| 402 | |
| 403 | typedef VariadicNSMutableDictionaryOf<NSString *, NSObject *, NSObject *>::type Dict3; // expected-note{{in instantiation of template}} |
| 404 | |
| 405 | typedef VariadicNSMutableDictionaryOf<NSString *>::type Dict3; // expected-note{{in instantiation of template}} |
| 406 | } |
| 407 | |
| 408 | // -------------------------------------------------------------------------- |
| 409 | // Parameterized classes are not templates |
| 410 | // -------------------------------------------------------------------------- |
| 411 | template<template<typename T, typename U> class TT> |
| 412 | struct AcceptsTemplateTemplate { }; |
| 413 | |
| 414 | typedef AcceptsTemplateTemplate<NSMutableDictionary> TemplateTemplateFail1; // expected-error{{template argument for template template parameter must be a class template or type alias template}} |
| 415 | |
| 416 | template<typename T> |
| 417 | struct DependentTemplate { |
| 418 | typedef typename T::template apply<NSString *, NSObject *> type; // expected-error{{'apply' following the 'template' keyword does not refer to a template}} |
| 419 | }; |
| 420 | |
| 421 | struct NSMutableDictionaryBuilder { |
| 422 | typedef NSMutableDictionary apply; // expected-note 2{{declared as a non-template here}} |
| 423 | }; |
| 424 | |
| 425 | typedef DependentTemplate<NSMutableDictionaryBuilder>::type DependentTemplateFail1; // expected-note{{in instantiation of template class}} |
| 426 | |
| 427 | template<typename K, typename V> |
| 428 | struct NonDependentTemplate { |
| 429 | typedef NSMutableDictionaryBuilder::template apply<NSString *, NSObject *> type; // expected-error{{'apply' following the 'template' keyword does not refer to a template}} |
| 430 | // expected-error@-1{{expected member name or }} |
| 431 | }; |
| 432 | |
| 433 | // However, one can use an alias template to turn a parameterized |
| 434 | // class into a template. |
| 435 | template<typename K, typename V> |
| 436 | using NSMutableDictionaryAlias = NSMutableDictionary<K, V>; |
| 437 | |
| 438 | typedef AcceptsTemplateTemplate<NSMutableDictionaryAlias> TemplateTemplateAlias1; // okay |
| 439 | |
| 440 | |
| 441 | |