1 // RUN: %clang_cc1 -fblocks %s -verify
3 #if !__has_feature(objc_generics)
4 # error Compiler does not support Objective-C generics?
7 #if !__has_feature(objc_generics_variance)
8 # error Compiler does not support co- and contr-variance?
11 @protocol NSObject // expected-note{{'NSObject' declared here}}
14 @protocol NSCopying // expected-note{{'NSCopying' declared here}}
17 __attribute__((objc_root_class))
18 @interface NSObject <NSObject> // expected-note{{'NSObject' defined here}}
21 @interface NSString : NSObject <NSCopying>
24 // --------------------------------------------------------------------------
25 // Parsing parameterized classes.
26 // --------------------------------------------------------------------------
28 // Parse type parameters with a bound
29 @interface PC1<T, U : NSObject*> : NSObject // expected-note{{'PC1' declared here}}
30 // expected-note@-1{{type parameter 'T' declared here}}
31 // expected-note@-2{{type parameter 'U' declared here}}
32 // expected-note@-3{{type parameter 'U' declared here}}
35 // Parse a type parameter with a bound that terminates in '>>'.
36 @interface PC2<T : id<NSObject>> : NSObject
39 // Parse multiple type parameters.
40 @interface PC3<T, U : id> : NSObject
43 // Parse multiple type parameters--grammatically ambiguous with protocol refs.
44 @interface PC4<T, U, V> : NSObject // expected-note 2{{'PC4' declared here}}
47 // Parse a type parameter list without a superclass.
48 @interface PC5<T : id>
51 // Parse a type parameter with name conflicts.
53 T> : NSObject // expected-error{{redeclaration of type parameter 'T'}}
56 // Parse Objective-C protocol references.
57 @interface PC7<T> // expected-error{{cannot find protocol declaration for 'T'}}
60 // Parse both type parameters and protocol references.
61 @interface PC8<T> : NSObject <NSObject>
64 // Type parameters with improper bounds.
65 @interface PC9<T : int, // expected-error{{type bound 'int' for type parameter 'T' is not an Objective-C pointer type}}
66 U : NSString> : NSObject // expected-error{{missing '*' in type bound 'NSString' for type parameter 'U'}}
69 // --------------------------------------------------------------------------
70 // Parsing parameterized forward declarations classes.
71 // --------------------------------------------------------------------------
73 // Okay: forward declaration without type parameters.
76 // Okay: forward declarations with type parameters.
77 @class PC10<T, U : NSObject *>, PC11<T : NSObject *, U : id>; // expected-note{{type parameter 'T' declared here}}
79 // Okay: forward declaration without type parameters following ones
80 // with type parameters.
83 // Okay: definition of class with type parameters that was formerly
84 // declared with the same type parameters.
85 @interface PC10<T, U : NSObject *> : NSObject
88 // Mismatched parameters in declaration of @interface following @class.
89 @interface PC11<T, U> : NSObject // expected-error{{missing type bound 'NSObject *' for type parameter 'T' in @interface}}
92 @interface PC12<T : NSObject *> : NSObject // expected-note{{type parameter 'T' declared here}}
97 // Mismatched parameters in subsequent forward declarations.
98 @class PC13<T : NSObject *>; // expected-note{{type parameter 'T' declared here}}
100 @class PC13<U>; // expected-error{{missing type bound 'NSObject *' for type parameter 'U' in @class}}
102 // Mismatch parameters in declaration of @class following @interface.
103 @class PC12<T>; // expected-error{{missing type bound 'NSObject *' for type parameter 'T' in @class}}
105 // Parameterized forward declaration a class that is not parameterized.
106 @class NSObject<T>; // expected-error{{forward declaration of non-parameterized class 'NSObject' cannot have type parameters}}
107 // expected-note@-1{{'NSObject' declared here}}
109 // Parameterized forward declaration preceding the definition (that is
110 // not parameterized).
111 @class NSNumber<T : NSObject *>; // expected-note{{'NSNumber' declared here}}
112 @interface NSNumber : NSObject // expected-error{{class 'NSNumber' previously declared with type parameters}}
117 // Okay: definition of class with type parameters that was formerly
118 // declared without type parameters.
119 @interface PC14<T, U : NSObject *> : NSObject
122 // --------------------------------------------------------------------------
123 // Parsing parameterized categories and extensions.
124 // --------------------------------------------------------------------------
126 // Inferring type bounds
127 @interface PC1<T, U> (Cat1) <NSObject>
130 // Matching type bounds
131 @interface PC1<T : id, U : NSObject *> (Cat2) <NSObject>
134 // Inferring type bounds
135 @interface PC1<T, U> () <NSObject>
138 // Matching type bounds
139 @interface PC1<T : id, U : NSObject *> () <NSObject>
142 // Missing type parameters.
143 @interface PC1<T> () // expected-error{{extension has too few type parameters (expected 2, have 1)}}
146 // Extra type parameters.
147 @interface PC1<T, U, V> (Cat3) // expected-error{{category has too many type parameters (expected 2, have 3)}}
150 // Mismatched bounds.
151 @interface PC1<T : NSObject *, // expected-error{{type bound 'NSObject *' for type parameter 'T' conflicts with implicit bound 'id'}}
152 X : id> () // expected-error{{type bound 'id' for type parameter 'X' conflicts with previous bound 'NSObject *'for type parameter 'U'}}
155 // Parameterized category/extension of non-parameterized class.
156 @interface NSObject<T> (Cat1) // expected-error{{category of non-parameterized class 'NSObject' cannot have type parameters}}
159 @interface NSObject<T> () // expected-error{{extension of non-parameterized class 'NSObject' cannot have type parameters}}
162 // --------------------------------------------------------------------------
163 // @implementations cannot have type parameters
164 // --------------------------------------------------------------------------
165 @implementation PC1<T : id> // expected-error{{@implementation cannot have type parameters}}
168 @implementation PC2<T> // expected-error{{@implementation declaration cannot be protocol qualified}}
171 @implementation PC1<T> (Cat1) // expected-error{{@implementation cannot have type parameters}}
174 @implementation PC1<T : id> (Cat2) // expected-error{{@implementation cannot have type parameters}}
177 typedef T undeclaredT; // expected-error{{unknown type name 'T'}}
179 // --------------------------------------------------------------------------
180 // Interfaces involving type parameters
181 // --------------------------------------------------------------------------
182 @interface PC20<T : id, U : NSObject *, V : NSString *> : NSObject {
186 - (U)method:(V)param;
189 @interface PC20<T, U, V> (Cat1)
190 - (U)catMethod:(V)param;
193 @interface PC20<X, Y, Z>()
194 - (X)extMethod:(Y)param;
197 // --------------------------------------------------------------------------
198 // Parsing type arguments.
199 // --------------------------------------------------------------------------
201 typedef NSString * ObjCStringRef; // expected-note{{'ObjCStringRef' declared here}}
203 // Type arguments with a mix of identifiers and type-names.
204 typedef PC4<id, NSObject *, NSString *> typeArgs1;
206 // Type arguments with only identifiers.
207 typedef PC4<id, id, id> typeArgs2;
209 // Type arguments with only identifiers; one is ambiguous (resolved as
211 typedef PC4<NSObject, id, id> typeArgs3; // expected-error{{type argument 'NSObject' must be a pointer (requires a '*')}}
213 // Type arguments with only identifiers; one is ambiguous (resolved as
214 // protocol qualifiers).
215 typedef PC4<NSObject, NSCopying> protocolQuals1;
217 // Type arguments and protocol qualifiers.
218 typedef PC4<id, NSObject *, id><NSObject, NSCopying> typeArgsAndProtocolQuals1;
220 // Type arguments and protocol qualifiers in the wrong order.
221 typedef PC4<NSObject, NSCopying><id, NSObject *, id> typeArgsAndProtocolQuals2; // expected-error{{protocol qualifiers must precede type arguments}}
223 // Type arguments and protocol qualifiers (identifiers).
224 typedef PC4<id, NSObject, id><NSObject, NSCopying> typeArgsAndProtocolQuals3; // expected-error{{type argument 'NSObject' must be a pointer (requires a '*')}}
226 // Typo correction: protocol bias.
227 typedef PC4<NSCopying, NSObjec> protocolQuals2; // expected-error{{cannot find protocol declaration for 'NSObjec'; did you mean 'NSObject'?}}
229 // Typo correction: type bias.
230 typedef PC4<id, id, NSObjec> typeArgs4; // expected-error{{unknown class name 'NSObjec'; did you mean 'NSObject'?}}
231 // expected-error@-1{{type argument 'NSObject' must be a pointer (requires a '*')}}
233 // Typo correction: bias set by correction itself to a protocol.
234 typedef PC4<NSObject, NSObject, NSCopyin> protocolQuals3; // expected-error{{cannot find protocol declaration for 'NSCopyin'; did you mean 'NSCopying'?}}
236 // Typo correction: bias set by correction itself to a type.
237 typedef PC4<NSObject, NSObject, ObjCStringref> typeArgs5; // expected-error{{unknown type name 'ObjCStringref'; did you mean 'ObjCStringRef'?}}
238 // expected-error@-1{{type argument 'NSObject' must be a pointer (requires a '*')}}
239 // expected-error@-2{{type argument 'NSObject' must be a pointer (requires a '*')}}
241 // Type/protocol conflict.
242 typedef PC4<NSCopying, ObjCStringRef> typeArgsProtocolQualsConflict1; // expected-error{{angle brackets contain both a type ('ObjCStringRef') and a protocol ('NSCopying')}}
243 typedef PC4<NSCopying, NSString *> typeArgsProtocolQualsConflict2; // expected-error{{angle brackets contain both a type ('NSString') and a protocol ('NSCopying')}}
244 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'}}
245 typedef PC4<UnknownType, NSString *> typeArgsProtocolQualsConflict4; // expected-error{{unknown type name 'UnknownType'}}
246 typedef PC4<NSString, NSCopying, NSString *> typeArgsProtocolQualsConflict5; // expected-error{{angle brackets contain both a type ('NSString') and a protocol ('NSCopying')}}
248 // Handling the '>>' in type argument lists.
249 typedef PC4<id<NSCopying>, NSObject *, id<NSObject>> typeArgs6;
251 // --------------------------------------------------------------------------
252 // Checking type arguments.
253 // --------------------------------------------------------------------------
255 @interface PC15<T : id, U : NSObject *, V : id<NSCopying>> : NSObject
256 // expected-note@-1{{type parameter 'V' declared here}}
257 // expected-note@-2{{type parameter 'V' declared here}}
258 // expected-note@-3{{type parameter 'U' declared here}}
261 typedef PC4<NSString *> tooFewTypeArgs1; // expected-error{{too few type arguments for class 'PC4' (have 1, expected 3)}}
263 typedef PC4<NSString *, NSString *, NSString *, NSString *> tooManyTypeArgs1; // expected-error{{too many type arguments for class 'PC4' (have 4, expected 3)}}
265 typedef PC15<int (^)(int, int), // block pointers as 'id'
266 NSString *, // subclass
267 NSString *> typeArgs7; // class that conforms to the protocol
269 typedef PC15<NSObject *, NSObject *, id<NSCopying>> typeArgs8;
271 typedef PC15<NSObject *, NSObject *,
272 NSObject *> typeArgs8b; // expected-error{{type argument 'NSObject *' does not satisfy the bound ('id<NSCopying>') of type parameter 'V'}}
275 id, // expected-error{{type argument 'id' does not satisfy the bound ('NSObject *') of type parameter 'U'}}
278 typedef PC15<id, NSObject *,
279 id> typeArgs10; // expected-error{{type argument 'id' does not satisfy the bound ('id<NSCopying>') of type parameter 'V'}}
282 int (^)(int, int), // okay
283 id<NSCopying, NSObject>> typeArgs11;
285 typedef PC15<id, NSString *, int (^)(int, int)> typeArgs12; // okay
287 typedef NSObject<id, id> typeArgs13; // expected-error{{type arguments cannot be applied to non-parameterized class 'NSObject'}}
289 typedef id<id, id> typeArgs14; // expected-error{{type arguments cannot be applied to non-class type 'id'}}
291 typedef PC1<NSObject *, NSString *> typeArgs15;
293 typedef PC1<NSObject *, NSString *><NSCopying> typeArgsAndProtocolQuals4;
295 typedef typeArgs15<NSCopying> typeArgsAndProtocolQuals5;
297 typedef typeArgs15<NSObject *, NSString *> typeArgs16; // expected-error{{type arguments cannot be applied to already-specialized class type 'typeArgs15' (aka 'PC1<NSObject *,NSString *>')}}
299 typedef typeArgs15<NSObject> typeArgsAndProtocolQuals6;
301 void testSpecializedTypePrinting(void) {
304 ip = (typeArgs15*)0; // expected-warning{{'typeArgs15 *' (aka 'PC1<NSObject *,NSString *> *')}}
305 ip = (typeArgsAndProtocolQuals4*)0; // expected-warning{{'typeArgsAndProtocolQuals4 *' (aka 'PC1<NSObject *,NSString *><NSCopying> *')}}
306 ip = (typeArgsAndProtocolQuals5*)0; // expected-warning{{'typeArgsAndProtocolQuals5 *' (aka 'typeArgs15<NSCopying> *')}}
307 ip = (typeArgsAndProtocolQuals6)0; // expected-error{{used type 'typeArgsAndProtocolQuals6' (aka 'typeArgs15<NSObject>')}}
308 ip = (typeArgsAndProtocolQuals6*)0;// expected-warning{{'typeArgsAndProtocolQuals6 *' (aka 'typeArgs15<NSObject> *')}}
311 // --------------------------------------------------------------------------
312 // Specialized superclasses
313 // --------------------------------------------------------------------------
314 @interface PC21<T : NSObject *> : PC1<T, T>
317 @interface PC22<T : NSObject *> : PC1<T> // expected-error{{too few type arguments for class 'PC1' (have 1, expected 2)}}
320 @interface PC23<T : NSObject *> : PC1<T, U> // expected-error{{unknown type name 'U'}}
323 @interface PC24<T> : PC1<T, T> // expected-error{{type argument 'T' (aka 'id') does not satisfy the bound ('NSObject *') of type parameter 'U'}}
326 @interface NSFoo : PC1<NSObject *, NSObject *> // okay
329 // --------------------------------------------------------------------------
330 // Co- and contra-variance.
331 // --------------------------------------------------------------------------
332 @class Variance1<T, U>;
334 @class Variance1<__covariant T, __contravariant U>;
336 @interface Variance1<__covariant T, __contravariant U> : NSObject // expected-note 2{{declared here}}
339 @interface Variance1<T, U> () // okay, inferred
342 @interface Variance1<T, U> (Cat1) // okay, inferred
345 @class Variance1<T, U>; // okay, inferred
347 @interface Variance1<__covariant T, __contravariant U> () // okay, matches
350 @interface Variance1<__covariant T, __contravariant U> (Cat2) // okay, matches
353 @class Variance1<__covariant T, __contravariant U>; // okay, matches
355 @interface Variance1<__contravariant X, // expected-error{{contravariant type parameter 'X' conflicts with previous covariant type parameter 'T'}}
356 __covariant Y> () // expected-error{{covariant type parameter 'Y' conflicts with previous contravariant type parameter 'U'}}
359 @class Variance2<__covariant T, __contravariant U>; // expected-note 2{{declared here}}
361 @interface Variance2<__contravariant T, // expected-error{{contravariant type parameter 'T' conflicts with previous covariant type parameter 'T'}}
362 U> : NSObject // expected-error{{invariant type parameter 'U' conflicts with previous contravariant type parameter 'U'}}