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440 lines
20 KiB
440 lines
20 KiB
// RUN: %clang_cc1 -fblocks -fsyntax-only -std=c++11 %s -verify
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//
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// Test the substitution of type arguments for type parameters when
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// using parameterized classes in Objective-C.
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__attribute__((objc_root_class))
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@interface NSObject
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+ (instancetype)alloc;
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- (instancetype)init;
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@end
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@protocol NSCopying
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@end
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@interface NSString : NSObject <NSCopying>
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@end
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@interface NSMutableString : NSString
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@end
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@interface NSNumber : NSObject <NSCopying>
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@end
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@interface NSArray<T> : NSObject <NSCopying> {
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@public
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T *data; // don't try this at home
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}
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- (T)objectAtIndexedSubscript:(int)index;
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+ (NSArray<T> *)array;
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@property (copy,nonatomic) T lastObject;
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@end
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@interface NSMutableArray<T> : NSArray<T>
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-(instancetype)initWithArray:(NSArray<T> *)array; // expected-note{{passing argument}}
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- (void)setObject:(T)object atIndexedSubscript:(int)index; // expected-note 2{{passing argument to parameter 'object' here}}
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@end
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@interface NSStringArray : NSArray<NSString *>
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@end
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@interface NSSet<T> : NSObject <NSCopying>
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- (T)firstObject;
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@property (nonatomic, copy) NSArray<T> *allObjects;
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@end
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// Parameterized inheritance (simple case)
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@interface NSMutableSet<U : id<NSCopying>> : NSSet<U>
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- (void)addObject:(U)object; // expected-note 7{{passing argument to parameter 'object' here}}
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@end
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@interface Widget : NSObject <NSCopying>
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@end
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// Non-parameterized class inheriting from a specialization of a
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// parameterized class.
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@interface WidgetSet : NSMutableSet<Widget *>
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@end
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// Parameterized inheritance with a more interesting transformation in
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// the specialization.
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@interface MutableSetOfArrays<T> : NSMutableSet<NSArray<T>*>
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@end
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// Inheriting from an unspecialized form of a parameterized type.
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@interface UntypedMutableSet : NSMutableSet
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@end
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@interface Window : NSObject
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@end
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@interface NSDictionary<K, V> : NSObject <NSCopying>
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- (V)objectForKeyedSubscript:(K)key; // expected-note 2{{parameter 'key'}}
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@end
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@interface NSMutableDictionary<K : id<NSCopying>, V> : NSDictionary<K, V> // expected-note 2{{type parameter 'K' declared here}} \
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// expected-note 2{{'NSMutableDictionary' declared here}}
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- (void)setObject:(V)object forKeyedSubscript:(K)key;
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// expected-note@-1 {{parameter 'object' here}}
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// expected-note@-2 {{parameter 'object' here}}
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// expected-note@-3 {{parameter 'key' here}}
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// expected-note@-4 {{parameter 'key' here}}
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@property (strong) K someRandomKey;
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@end
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@interface WindowArray : NSArray<Window *>
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@end
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@interface NSSet<T> (Searching)
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- (T)findObject:(T)object;
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@end
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// --------------------------------------------------------------------------
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// Message sends.
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// --------------------------------------------------------------------------
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void test_message_send_result(
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NSSet<NSString *> *stringSet,
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NSMutableSet<NSString *> *mutStringSet,
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WidgetSet *widgetSet,
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UntypedMutableSet *untypedMutSet,
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MutableSetOfArrays<NSString *> *mutStringArraySet,
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NSSet *set,
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NSMutableSet *mutSet,
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MutableSetOfArrays *mutArraySet,
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NSArray<NSString *> *stringArray,
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void (^block)(void)) {
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int *ip;
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ip = [stringSet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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ip = [mutStringSet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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ip = [widgetSet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'Widget *'}}
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ip = [untypedMutSet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = [mutStringArraySet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = [set firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = [mutSet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = [mutArraySet firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = [block firstObject]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = [stringSet findObject:@"blah"]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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// Class messages.
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ip = [NSSet<NSString *> alloc]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSSet<NSString *> *'}}
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ip = [NSSet alloc]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSSet *'}}
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ip = [MutableSetOfArrays<NSString *> alloc]; // expected-error{{incompatible pointer types assigning to 'int *' from 'MutableSetOfArrays<NSString *> *'}}
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ip = [MutableSetOfArrays alloc]; // expected-error{{incompatible pointer types assigning to 'int *' from 'MutableSetOfArrays *'}}
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ip = [NSArray<NSString *> array]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = [NSArray<NSString *><NSCopying> array]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = [[NSMutableArray<NSString *> alloc] init]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSMutableArray<NSString *> *'}}
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[[NSMutableArray alloc] initWithArray: stringArray]; // okay
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[[NSMutableArray<NSString *> alloc] initWithArray: stringArray]; // okay
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[[NSMutableArray<NSNumber *> alloc] initWithArray: stringArray]; // expected-error{{parameter of type 'NSArray<NSNumber *> *' with an lvalue of type 'NSArray<NSString *> *'}}
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}
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void test_message_send_param(
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NSMutableSet<NSString *> *mutStringSet,
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WidgetSet *widgetSet,
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UntypedMutableSet *untypedMutSet,
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MutableSetOfArrays<NSString *> *mutStringArraySet,
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NSMutableSet *mutSet,
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MutableSetOfArrays *mutArraySet,
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void (^block)(void)) {
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Window *window;
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[mutStringSet addObject: window]; // expected-error{{parameter of type 'NSString *'}}
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[widgetSet addObject: window]; // expected-error{{parameter of type 'Widget *'}}
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[untypedMutSet addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}}
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[mutStringArraySet addObject: window]; // expected-error{{parameter of type 'NSArray<NSString *> *'}}
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[mutSet addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}}
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[mutArraySet addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}}
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[block addObject: window]; // expected-error{{parameter of type 'id<NSCopying>'}}
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}
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// --------------------------------------------------------------------------
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// Property accesses.
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// --------------------------------------------------------------------------
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void test_property_read(
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NSSet<NSString *> *stringSet,
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NSMutableSet<NSString *> *mutStringSet,
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WidgetSet *widgetSet,
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UntypedMutableSet *untypedMutSet,
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MutableSetOfArrays<NSString *> *mutStringArraySet,
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NSSet *set,
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NSMutableSet *mutSet,
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MutableSetOfArrays *mutArraySet,
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NSMutableDictionary *mutDict) {
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int *ip;
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ip = stringSet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = mutStringSet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = widgetSet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<Widget *> *'}}
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ip = untypedMutSet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = mutStringArraySet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSArray<NSString *> *> *'}}
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ip = set.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = mutSet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = mutArraySet.allObjects; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = mutDict.someRandomKey; // expected-error{{incompatible pointer types assigning to 'int *' from '__kindof id<NSCopying>'}}
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}
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void test_property_write(
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NSMutableSet<NSString *> *mutStringSet,
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WidgetSet *widgetSet,
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UntypedMutableSet *untypedMutSet,
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MutableSetOfArrays<NSString *> *mutStringArraySet,
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NSMutableSet *mutSet,
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MutableSetOfArrays *mutArraySet,
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NSMutableDictionary *mutDict) {
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int *ip;
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mutStringSet.allObjects = ip; // expected-error{{to 'NSArray<NSString *> *'}}
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widgetSet.allObjects = ip; // expected-error{{to 'NSArray<Widget *> *'}}
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untypedMutSet.allObjects = ip; // expected-error{{to 'NSArray *'}}
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mutStringArraySet.allObjects = ip; // expected-error{{to 'NSArray<NSArray<NSString *> *> *'}}
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mutSet.allObjects = ip; // expected-error{{to 'NSArray *'}}
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mutArraySet.allObjects = ip; // expected-error{{to 'NSArray *'}}
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mutDict.someRandomKey = ip; // expected-error{{to 'id<NSCopying>'}}
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}
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// --------------------------------------------------------------------------
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// Subscripting
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// --------------------------------------------------------------------------
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void test_subscripting(
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NSArray<NSString *> *stringArray,
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NSMutableArray<NSString *> *mutStringArray,
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NSArray *array,
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NSMutableArray *mutArray,
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NSDictionary<NSString *, Widget *> *stringWidgetDict,
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NSMutableDictionary<NSString *, Widget *> *mutStringWidgetDict,
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NSDictionary *dict,
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NSMutableDictionary *mutDict) {
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int *ip;
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NSString *string;
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Widget *widget;
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Window *window;
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ip = stringArray[0]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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ip = mutStringArray[0]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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mutStringArray[0] = ip; // expected-error{{parameter of type 'NSString *'}}
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ip = array[0]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = mutArray[0]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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mutArray[0] = ip; // expected-error{{parameter of type 'id'}}
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ip = stringWidgetDict[string]; // expected-error{{incompatible pointer types assigning to 'int *' from 'Widget *'}}
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widget = stringWidgetDict[widget]; // expected-error{{parameter of type 'NSString *'}}
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ip = mutStringWidgetDict[string]; // expected-error{{incompatible pointer types assigning to 'int *' from 'Widget *'}}
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widget = mutStringWidgetDict[widget]; // expected-error{{parameter of type 'NSString *'}}
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mutStringWidgetDict[string] = ip; // expected-error{{parameter of type 'Widget *'}}
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mutStringWidgetDict[widget] = widget; // expected-error{{parameter of type 'NSString *'}}
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ip = dict[string]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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ip = mutDict[string]; // expected-error{{incompatible pointer types assigning to 'int *' from 'id'}}
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mutDict[string] = ip; // expected-error{{parameter of type 'id'}}
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widget = mutDict[window];
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mutDict[window] = widget; // expected-error{{parameter of type 'id<NSCopying>'}}
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}
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// --------------------------------------------------------------------------
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// Instance variable access.
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// --------------------------------------------------------------------------
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void test_instance_variable(NSArray<NSString *> *stringArray,
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NSArray *array) {
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int *ip;
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ip = stringArray->data; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString **'}}
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ip = array->data; // expected-error{{incompatible pointer types assigning to 'int *' from 'id *'}}
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}
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@implementation WindowArray
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- (void)testInstanceVariable {
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int *ip;
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ip = data; // expected-error{{incompatible pointer types assigning to 'int *' from 'Window **'}}
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}
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@end
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// --------------------------------------------------------------------------
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// Implicit conversions.
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// --------------------------------------------------------------------------
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void test_implicit_conversions(NSArray<NSString *> *stringArray,
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NSArray<NSNumber *> *numberArray,
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NSMutableArray<NSString *> *mutStringArray,
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NSArray *array,
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NSMutableArray *mutArray) {
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// Specialized -> unspecialized (same level)
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array = stringArray;
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// Unspecialized -> specialized (same level)
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stringArray = array;
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// Specialized -> specialized failure (same level).
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stringArray = numberArray; // expected-error{{incompatible pointer types assigning to 'NSArray<NSString *> *' from 'NSArray<NSNumber *> *'}}
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// Specialized -> specialized (different levels).
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stringArray = mutStringArray;
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// Specialized -> specialized failure (different levels).
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numberArray = mutStringArray; // expected-error{{incompatible pointer types assigning to 'NSArray<NSNumber *> *' from 'NSMutableArray<NSString *> *'}}
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// Unspecialized -> specialized (different levels).
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stringArray = mutArray;
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// Specialized -> unspecialized (different levels).
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array = mutStringArray;
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}
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@interface NSCovariant1<__covariant T>
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@end
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@interface NSContravariant1<__contravariant T>
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@end
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void test_variance(NSCovariant1<NSString *> *covariant1,
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NSCovariant1<NSMutableString *> *covariant2,
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NSCovariant1<NSString *(^)(void)> *covariant3,
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NSCovariant1<NSMutableString *(^)(void)> *covariant4,
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NSCovariant1<id> *covariant5,
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NSCovariant1<id<NSCopying>> *covariant6,
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NSContravariant1<NSString *> *contravariant1,
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NSContravariant1<NSMutableString *> *contravariant2) {
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covariant1 = covariant2; // okay
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covariant2 = covariant1; // expected-warning{{incompatible pointer types assigning to 'NSCovariant1<NSMutableString *> *' from 'NSCovariant1<NSString *> *'}}
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covariant3 = covariant4; // okay
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covariant4 = covariant3; // expected-warning{{incompatible pointer types assigning to 'NSCovariant1<NSMutableString *(^)()> *' from 'NSCovariant1<NSString *(^)()> *'}}
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covariant5 = covariant1; // okay
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covariant1 = covariant5; // okay: id is promiscuous
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covariant5 = covariant3; // okay
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covariant3 = covariant5; // okay
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contravariant1 = contravariant2; // expected-warning{{incompatible pointer types assigning to 'NSContravariant1<NSString *> *' from 'NSContravariant1<NSMutableString *> *'}}
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contravariant2 = contravariant1; // okay
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}
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// --------------------------------------------------------------------------
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// Ternary operator
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// --------------------------------------------------------------------------
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void test_ternary_operator(NSArray<NSString *> *stringArray,
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NSArray<NSNumber *> *numberArray,
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NSMutableArray<NSString *> *mutStringArray,
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NSStringArray *stringArray2,
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NSArray *array,
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NSMutableArray *mutArray,
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int cond) {
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int *ip;
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id object;
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ip = cond ? stringArray : mutStringArray; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = cond ? mutStringArray : stringArray; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = cond ? stringArray2 : mutStringArray; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = cond ? mutStringArray : stringArray2; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = cond ? stringArray : mutArray; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = cond ? stringArray2 : mutArray; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = cond ? mutArray : stringArray; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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ip = cond ? mutArray : stringArray2; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray *'}}
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object = cond ? stringArray : numberArray; // expected-warning{{incompatible operand types ('NSArray<NSString *> *' and 'NSArray<NSNumber *> *')}}
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}
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// --------------------------------------------------------------------------
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// super
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// --------------------------------------------------------------------------
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@implementation NSStringArray
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- (void)useSuperMethod {
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int *ip;
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ip = super.lastObject; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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ip = [super objectAtIndexedSubscript:0]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSString *'}}
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}
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+ (void)useSuperMethod {
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int *ip;
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ip = super.array; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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ip = [super array]; // expected-error{{incompatible pointer types assigning to 'int *' from 'NSArray<NSString *> *'}}
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}
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@end
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// --------------------------------------------------------------------------
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// Template instantiation
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// --------------------------------------------------------------------------
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template<typename K, typename V>
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struct NSMutableDictionaryOf {
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typedef NSMutableDictionary<K, V> *type; // expected-error{{type argument 'NSObject *' does not satisfy the bound ('id<NSCopying>') of type parameter 'K'}}
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};
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template<typename ...Args>
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struct VariadicNSMutableDictionaryOf {
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typedef NSMutableDictionary<Args...> *type; // expected-error{{type argument 'NSObject *' does not satisfy the bound ('id<NSCopying>') of type parameter 'K'}}
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// expected-error@-1{{too many type arguments for class 'NSMutableDictionary' (have 3, expected 2)}}
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// expected-error@-2{{too few type arguments for class 'NSMutableDictionary' (have 1, expected 2)}}
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};
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void testInstantiation() {
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int *ip;
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typedef NSMutableDictionaryOf<NSString *, NSObject *>::type Dict1;
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Dict1 d1 = ip; // expected-error{{cannot initialize a variable of type 'Dict1' (aka 'NSMutableDictionary<NSString *,NSObject *> *')}}
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typedef NSMutableDictionaryOf<NSObject *, NSString *>::type Dict2; // expected-note{{in instantiation of template}}
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}
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void testVariadicInstantiation() {
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int *ip;
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typedef VariadicNSMutableDictionaryOf<NSString *, NSObject *>::type Dict1;
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Dict1 d1 = ip; // expected-error{{cannot initialize a variable of type 'Dict1' (aka 'NSMutableDictionary<NSString *,NSObject *> *')}}
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typedef VariadicNSMutableDictionaryOf<NSObject *, NSString *>::type Dict2; // expected-note{{in instantiation of template}}
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typedef VariadicNSMutableDictionaryOf<NSString *, NSObject *, NSObject *>::type Dict3; // expected-note{{in instantiation of template}}
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typedef VariadicNSMutableDictionaryOf<NSString *>::type Dict3; // expected-note{{in instantiation of template}}
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}
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// --------------------------------------------------------------------------
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// Parameterized classes are not templates
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// --------------------------------------------------------------------------
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template<template<typename T, typename U> class TT>
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struct AcceptsTemplateTemplate { };
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typedef AcceptsTemplateTemplate<NSMutableDictionary> TemplateTemplateFail1; // expected-error{{template argument for template template parameter must be a class template or type alias template}}
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template<typename T>
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struct DependentTemplate {
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typedef typename T::template apply<NSString *, NSObject *> type; // expected-error{{'apply' following the 'template' keyword does not refer to a template}}
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};
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struct NSMutableDictionaryBuilder {
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typedef NSMutableDictionary apply; // expected-note 2{{declared as a non-template here}}
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};
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typedef DependentTemplate<NSMutableDictionaryBuilder>::type DependentTemplateFail1; // expected-note{{in instantiation of template class}}
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template<typename K, typename V>
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struct NonDependentTemplate {
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typedef NSMutableDictionaryBuilder::template apply<NSString *, NSObject *> type; // expected-error{{'apply' following the 'template' keyword does not refer to a template}}
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};
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// However, one can use an alias template to turn a parameterized
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// class into a template.
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template<typename K, typename V>
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using NSMutableDictionaryAlias = NSMutableDictionary<K, V>;
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typedef AcceptsTemplateTemplate<NSMutableDictionaryAlias> TemplateTemplateAlias1; // okay
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