364 lines
15 KiB
Objective-C
364 lines
15 KiB
Objective-C
// RUN: %clang_cc1 -fblocks %s -verify
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#if !__has_feature(objc_generics)
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# error Compiler does not support Objective-C generics?
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#endif
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#if !__has_feature(objc_generics_variance)
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# error Compiler does not support co- and contr-variance?
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#endif
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@protocol NSObject // expected-note{{'NSObject' declared here}}
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@end
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@protocol NSCopying // expected-note{{'NSCopying' declared here}}
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@end
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__attribute__((objc_root_class))
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@interface NSObject <NSObject> // expected-note{{'NSObject' defined here}}
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@end
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@interface NSString : NSObject <NSCopying>
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@end
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// --------------------------------------------------------------------------
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// Parsing parameterized classes.
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// --------------------------------------------------------------------------
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// Parse type parameters with a bound
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@interface PC1<T, U : NSObject*> : NSObject // expected-note{{'PC1' declared here}}
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// expected-note@-1{{type parameter 'T' declared here}}
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// expected-note@-2{{type parameter 'U' declared here}}
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// expected-note@-3{{type parameter 'U' declared here}}
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@end
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// Parse a type parameter with a bound that terminates in '>>'.
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@interface PC2<T : id<NSObject>> : NSObject
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@end
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// Parse multiple type parameters.
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@interface PC3<T, U : id> : NSObject
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@end
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// Parse multiple type parameters--grammatically ambiguous with protocol refs.
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@interface PC4<T, U, V> : NSObject // expected-note 2{{'PC4' declared here}}
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@end
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// Parse a type parameter list without a superclass.
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@interface PC5<T : id>
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@end
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// Parse a type parameter with name conflicts.
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@interface PC6<T, U,
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T> : NSObject // expected-error{{redeclaration of type parameter 'T'}}
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@end
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// Parse Objective-C protocol references.
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@interface PC7<T> // expected-error{{cannot find protocol declaration for 'T'}}
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@end
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// Parse both type parameters and protocol references.
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@interface PC8<T> : NSObject <NSObject>
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@end
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// Type parameters with improper bounds.
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@interface PC9<T : int, // expected-error{{type bound 'int' for type parameter 'T' is not an Objective-C pointer type}}
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U : NSString> : NSObject // expected-error{{missing '*' in type bound 'NSString' for type parameter 'U'}}
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@end
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// --------------------------------------------------------------------------
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// Parsing parameterized forward declarations classes.
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// --------------------------------------------------------------------------
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// Okay: forward declaration without type parameters.
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@class PC10;
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// Okay: forward declarations with type parameters.
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@class PC10<T, U : NSObject *>, PC11<T : NSObject *, U : id>; // expected-note{{type parameter 'T' declared here}}
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// Okay: forward declaration without type parameters following ones
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// with type parameters.
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@class PC10, PC11;
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// Okay: definition of class with type parameters that was formerly
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// declared with the same type parameters.
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@interface PC10<T, U : NSObject *> : NSObject
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@end
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// Mismatched parameters in declaration of @interface following @class.
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@interface PC11<T, U> : NSObject // expected-error{{missing type bound 'NSObject *' for type parameter 'T' in @interface}}
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@end
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@interface PC12<T : NSObject *> : NSObject // expected-note{{type parameter 'T' declared here}}
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@end
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@class PC12;
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// Mismatched parameters in subsequent forward declarations.
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@class PC13<T : NSObject *>; // expected-note{{type parameter 'T' declared here}}
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@class PC13;
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@class PC13<U>; // expected-error{{missing type bound 'NSObject *' for type parameter 'U' in @class}}
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// Mismatch parameters in declaration of @class following @interface.
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@class PC12<T>; // expected-error{{missing type bound 'NSObject *' for type parameter 'T' in @class}}
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// Parameterized forward declaration a class that is not parameterized.
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@class NSObject<T>; // expected-error{{forward declaration of non-parameterized class 'NSObject' cannot have type parameters}}
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// expected-note@-1{{'NSObject' declared here}}
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// Parameterized forward declaration preceding the definition (that is
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// not parameterized).
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@class NSNumber<T : NSObject *>; // expected-note{{'NSNumber' declared here}}
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@interface NSNumber : NSObject // expected-error{{class 'NSNumber' previously declared with type parameters}}
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@end
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@class PC14;
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// Okay: definition of class with type parameters that was formerly
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// declared without type parameters.
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@interface PC14<T, U : NSObject *> : NSObject
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@end
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// --------------------------------------------------------------------------
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// Parsing parameterized categories and extensions.
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// --------------------------------------------------------------------------
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// Inferring type bounds
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@interface PC1<T, U> (Cat1) <NSObject>
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@end
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// Matching type bounds
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@interface PC1<T : id, U : NSObject *> (Cat2) <NSObject>
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@end
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// Inferring type bounds
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@interface PC1<T, U> () <NSObject>
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@end
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// Matching type bounds
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@interface PC1<T : id, U : NSObject *> () <NSObject>
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@end
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// Missing type parameters.
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@interface PC1<T> () // expected-error{{extension has too few type parameters (expected 2, have 1)}}
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@end
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// Extra type parameters.
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@interface PC1<T, U, V> (Cat3) // expected-error{{category has too many type parameters (expected 2, have 3)}}
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@end
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// Mismatched bounds.
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@interface PC1<T : NSObject *, // expected-error{{type bound 'NSObject *' for type parameter 'T' conflicts with implicit bound 'id'}}
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X : id> () // expected-error{{type bound 'id' for type parameter 'X' conflicts with previous bound 'NSObject *'for type parameter 'U'}}
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@end
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// Parameterized category/extension of non-parameterized class.
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@interface NSObject<T> (Cat1) // expected-error{{category of non-parameterized class 'NSObject' cannot have type parameters}}
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@end
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@interface NSObject<T> () // expected-error{{extension of non-parameterized class 'NSObject' cannot have type parameters}}
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@end
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// --------------------------------------------------------------------------
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// @implementations cannot have type parameters
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// --------------------------------------------------------------------------
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@implementation PC1<T : id> // expected-error{{@implementation cannot have type parameters}}
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@end
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@implementation PC2<T> // expected-error{{@implementation declaration cannot be protocol qualified}}
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@end
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@implementation PC1<T> (Cat1) // expected-error{{@implementation cannot have type parameters}}
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@end
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@implementation PC1<T : id> (Cat2) // expected-error{{@implementation cannot have type parameters}}
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@end
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typedef T undeclaredT; // expected-error{{unknown type name 'T'}}
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// --------------------------------------------------------------------------
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// Interfaces involving type parameters
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// --------------------------------------------------------------------------
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@interface PC20<T : id, U : NSObject *, V : NSString *> : NSObject {
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T object;
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}
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- (U)method:(V)param;
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@end
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@interface PC20<T, U, V> (Cat1)
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- (U)catMethod:(V)param;
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@end
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@interface PC20<X, Y, Z>()
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- (X)extMethod:(Y)param;
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@end
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// --------------------------------------------------------------------------
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// Parsing type arguments.
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// --------------------------------------------------------------------------
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typedef NSString * ObjCStringRef; // expected-note{{'ObjCStringRef' declared here}}
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// Type arguments with a mix of identifiers and type-names.
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typedef PC4<id, NSObject *, NSString *> typeArgs1;
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// Type arguments with only identifiers.
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typedef PC4<id, id, id> typeArgs2;
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// Type arguments with only identifiers; one is ambiguous (resolved as
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// types).
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typedef PC4<NSObject, id, id> typeArgs3; // expected-error{{type argument 'NSObject' must be a pointer (requires a '*')}}
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// Type arguments with only identifiers; one is ambiguous (resolved as
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// protocol qualifiers).
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typedef PC4<NSObject, NSCopying> protocolQuals1;
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// Type arguments and protocol qualifiers.
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typedef PC4<id, NSObject *, id><NSObject, NSCopying> typeArgsAndProtocolQuals1;
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// Type arguments and protocol qualifiers in the wrong order.
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typedef PC4<NSObject, NSCopying><id, NSObject *, id> typeArgsAndProtocolQuals2; // expected-error{{protocol qualifiers must precede type arguments}}
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// Type arguments and protocol qualifiers (identifiers).
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typedef PC4<id, NSObject, id><NSObject, NSCopying> typeArgsAndProtocolQuals3; // expected-error{{type argument 'NSObject' must be a pointer (requires a '*')}}
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// Typo correction: protocol bias.
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typedef PC4<NSCopying, NSObjec> protocolQuals2; // expected-error{{cannot find protocol declaration for 'NSObjec'; did you mean 'NSObject'?}}
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// Typo correction: type bias.
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typedef PC4<id, id, NSObjec> typeArgs4; // expected-error{{unknown class name 'NSObjec'; did you mean 'NSObject'?}}
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// expected-error@-1{{type argument 'NSObject' must be a pointer (requires a '*')}}
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// Typo correction: bias set by correction itself to a protocol.
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typedef PC4<NSObject, NSObject, NSCopyin> protocolQuals3; // expected-error{{cannot find protocol declaration for 'NSCopyin'; did you mean 'NSCopying'?}}
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// Typo correction: bias set by correction itself to a type.
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typedef PC4<NSObject, NSObject, ObjCStringref> typeArgs5; // expected-error{{unknown type name 'ObjCStringref'; did you mean 'ObjCStringRef'?}}
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// expected-error@-1{{type argument 'NSObject' must be a pointer (requires a '*')}}
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// expected-error@-2{{type argument 'NSObject' must be a pointer (requires a '*')}}
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// Type/protocol conflict.
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typedef PC4<NSCopying, ObjCStringRef> typeArgsProtocolQualsConflict1; // expected-error{{angle brackets contain both a type ('ObjCStringRef') and a protocol ('NSCopying')}}
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typedef PC4<NSCopying, NSString *> typeArgsProtocolQualsConflict2; // expected-error{{angle brackets contain both a type ('NSString') and a protocol ('NSCopying')}}
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typedef PC4<NSCopying, UnknownType, NSString *> typeArgsProtocolQualsConflict3; // expected-error{{angle brackets contain both a type ('NSString') and a protocol ('NSCopying')}} expected-error{{unknown type name 'UnknownType'}}
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typedef PC4<UnknownType, NSString *> typeArgsProtocolQualsConflict4; // expected-error{{unknown type name 'UnknownType'}}
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typedef PC4<NSString, NSCopying, NSString *> typeArgsProtocolQualsConflict5; // expected-error{{angle brackets contain both a type ('NSString') and a protocol ('NSCopying')}}
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// Handling the '>>' in type argument lists.
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typedef PC4<id<NSCopying>, NSObject *, id<NSObject>> typeArgs6;
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// --------------------------------------------------------------------------
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// Checking type arguments.
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// --------------------------------------------------------------------------
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@interface PC15<T : id, U : NSObject *, V : id<NSCopying>> : NSObject
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// expected-note@-1{{type parameter 'V' declared here}}
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// expected-note@-2{{type parameter 'V' declared here}}
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// expected-note@-3{{type parameter 'U' declared here}}
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@end
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typedef PC4<NSString *> tooFewTypeArgs1; // expected-error{{too few type arguments for class 'PC4' (have 1, expected 3)}}
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typedef PC4<NSString *, NSString *, NSString *, NSString *> tooManyTypeArgs1; // expected-error{{too many type arguments for class 'PC4' (have 4, expected 3)}}
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typedef PC15<int (^)(int, int), // block pointers as 'id'
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NSString *, // subclass
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NSString *> typeArgs7; // class that conforms to the protocol
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typedef PC15<NSObject *, NSObject *, id<NSCopying>> typeArgs8;
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typedef PC15<NSObject *, NSObject *,
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NSObject *> typeArgs8b; // expected-error{{type argument 'NSObject *' does not satisfy the bound ('id<NSCopying>') of type parameter 'V'}}
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typedef PC15<id,
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id, // expected-error{{type argument 'id' does not satisfy the bound ('NSObject *') of type parameter 'U'}}
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id> typeArgs9;
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typedef PC15<id, NSObject *,
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id> typeArgs10; // expected-error{{type argument 'id' does not satisfy the bound ('id<NSCopying>') of type parameter 'V'}}
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typedef PC15<id,
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int (^)(int, int), // okay
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id<NSCopying, NSObject>> typeArgs11;
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typedef PC15<id, NSString *, int (^)(int, int)> typeArgs12; // okay
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typedef NSObject<id, id> typeArgs13; // expected-error{{type arguments cannot be applied to non-parameterized class 'NSObject'}}
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typedef id<id, id> typeArgs14; // expected-error{{type arguments cannot be applied to non-class type 'id'}}
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typedef PC1<NSObject *, NSString *> typeArgs15;
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typedef PC1<NSObject *, NSString *><NSCopying> typeArgsAndProtocolQuals4;
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typedef typeArgs15<NSCopying> typeArgsAndProtocolQuals5;
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typedef typeArgs15<NSObject *, NSString *> typeArgs16; // expected-error{{type arguments cannot be applied to already-specialized class type 'typeArgs15' (aka 'PC1<NSObject *,NSString *>')}}
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typedef typeArgs15<NSObject> typeArgsAndProtocolQuals6;
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void testSpecializedTypePrinting() {
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int *ip;
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ip = (typeArgs15*)0; // expected-warning{{'typeArgs15 *' (aka 'PC1<NSObject *,NSString *> *')}}
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ip = (typeArgsAndProtocolQuals4*)0; // expected-warning{{'typeArgsAndProtocolQuals4 *' (aka 'PC1<NSObject *,NSString *><NSCopying> *')}}
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ip = (typeArgsAndProtocolQuals5*)0; // expected-warning{{'typeArgsAndProtocolQuals5 *' (aka 'typeArgs15<NSCopying> *')}}
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ip = (typeArgsAndProtocolQuals6)0; // expected-error{{used type 'typeArgsAndProtocolQuals6' (aka 'typeArgs15<NSObject>')}}
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ip = (typeArgsAndProtocolQuals6*)0;// expected-warning{{'typeArgsAndProtocolQuals6 *' (aka 'typeArgs15<NSObject> *')}}
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}
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// --------------------------------------------------------------------------
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// Specialized superclasses
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// --------------------------------------------------------------------------
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@interface PC21<T : NSObject *> : PC1<T, T>
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@end
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@interface PC22<T : NSObject *> : PC1<T> // expected-error{{too few type arguments for class 'PC1' (have 1, expected 2)}}
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@end
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@interface PC23<T : NSObject *> : PC1<T, U> // expected-error{{unknown type name 'U'}}
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@end
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@interface PC24<T> : PC1<T, T> // expected-error{{type argument 'T' (aka 'id') does not satisfy the bound ('NSObject *') of type parameter 'U'}}
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@end
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@interface NSFoo : PC1<NSObject *, NSObject *> // okay
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@end
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// --------------------------------------------------------------------------
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// Co- and contra-variance.
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// --------------------------------------------------------------------------
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@class Variance1<T, U>;
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@class Variance1<__covariant T, __contravariant U>;
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@interface Variance1<__covariant T, __contravariant U> : NSObject // expected-note 2{{declared here}}
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@end
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@interface Variance1<T, U> () // okay, inferred
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@end
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@interface Variance1<T, U> (Cat1) // okay, inferred
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@end
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@class Variance1<T, U>; // okay, inferred
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@interface Variance1<__covariant T, __contravariant U> () // okay, matches
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@end
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@interface Variance1<__covariant T, __contravariant U> (Cat2) // okay, matches
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@end
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@class Variance1<__covariant T, __contravariant U>; // okay, matches
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@interface Variance1<__contravariant X, // expected-error{{contravariant type parameter 'X' conflicts with previous covariant type parameter 'T'}}
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__covariant Y> () // expected-error{{covariant type parameter 'Y' conflicts with previous contravariant type parameter 'U'}}
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@end
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@class Variance2<__covariant T, __contravariant U>; // expected-note 2{{declared here}}
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@interface Variance2<__contravariant T, // expected-error{{contravariant type parameter 'T' conflicts with previous covariant type parameter 'T'}}
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U> : NSObject // expected-error{{invariant type parameter 'U' conflicts with previous contravariant type parameter 'U'}}
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@end
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