SemaDeclObjC.cpp revision e13b9595dc1e2f4288bec34f3412359f648e84a5
1//===--- SemaDeclObjC.cpp - Semantic Analysis for ObjC Declarations -------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements semantic analysis for Objective C declarations. 11// 12//===----------------------------------------------------------------------===// 13 14#include "Sema.h" 15#include "clang/AST/ASTContext.h" 16#include "clang/AST/DeclObjC.h" 17#include "clang/Parse/Scope.h" 18 19using namespace clang; 20 21/// ObjCActOnStartOfMethodDef - This routine sets up parameters; invisible 22/// and user declared, in the method definition's AST. 23void Sema::ObjCActOnStartOfMethodDef(Scope *FnBodyScope, DeclTy *D) { 24 assert(getCurMethodDecl() == 0 && "Method parsing confused"); 25 ObjCMethodDecl *MDecl = dyn_cast_or_null<ObjCMethodDecl>((Decl *)D); 26 27 // If we don't have a valid method decl, simply return. 28 if (!MDecl) 29 return; 30 31 // Allow the rest of sema to find private method decl implementations. 32 if (MDecl->isInstance()) 33 AddInstanceMethodToGlobalPool(MDecl); 34 else 35 AddFactoryMethodToGlobalPool(MDecl); 36 37 // Allow all of Sema to see that we are entering a method definition. 38 PushDeclContext(MDecl); 39 40 // Create Decl objects for each parameter, entrring them in the scope for 41 // binding to their use. 42 struct DeclaratorChunk::ParamInfo PI; 43 44 // Insert the invisible arguments, self and _cmd! 45 PI.Ident = &Context.Idents.get("self"); 46 PI.IdentLoc = SourceLocation(); // synthesized vars have a null location. 47 QualType selfTy; 48 if (MDecl->isInstance()) { 49 selfTy = Context.getObjCIdType(); 50 if (ObjCInterfaceDecl *OID = MDecl->getClassInterface()) { 51 // There may be no interface context due to error in declaration of the 52 // interface (which has been reported). Recover gracefully 53 selfTy = Context.getObjCInterfaceType(OID); 54 selfTy = Context.getPointerType(selfTy); 55 } 56 } else // we have a factory method. 57 selfTy = Context.getObjCClassType(); 58 getCurMethodDecl()->setSelfDecl(CreateImplicitParameter(FnBodyScope, 59 PI.Ident, PI.IdentLoc, selfTy)); 60 61 PI.Ident = &Context.Idents.get("_cmd"); 62 getCurMethodDecl()->setCmdDecl(CreateImplicitParameter(FnBodyScope, 63 PI.Ident, PI.IdentLoc, Context.getObjCSelType())); 64 65 // Introduce all of the other parameters into this scope. 66 for (unsigned i = 0, e = MDecl->getNumParams(); i != e; ++i) { 67 ParmVarDecl *PDecl = MDecl->getParamDecl(i); 68 IdentifierInfo *II = PDecl->getIdentifier(); 69 if (II) 70 PushOnScopeChains(PDecl, FnBodyScope); 71 } 72} 73 74Sema::DeclTy *Sema:: 75ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 76 IdentifierInfo *ClassName, SourceLocation ClassLoc, 77 IdentifierInfo *SuperName, SourceLocation SuperLoc, 78 const IdentifierLocPair *ProtocolNames, 79 unsigned NumProtocols, 80 SourceLocation EndProtoLoc, AttributeList *AttrList) { 81 assert(ClassName && "Missing class identifier"); 82 83 // Check for another declaration kind with the same name. 84 Decl *PrevDecl = LookupDecl(ClassName, Decl::IDNS_Ordinary, TUScope); 85 if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { 86 Diag(ClassLoc, diag::err_redefinition_different_kind, 87 ClassName->getName()); 88 Diag(PrevDecl->getLocation(), diag::err_previous_definition); 89 } 90 91 ObjCInterfaceDecl* IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); 92 if (IDecl) { 93 // Class already seen. Is it a forward declaration? 94 if (!IDecl->isForwardDecl()) 95 Diag(AtInterfaceLoc, diag::err_duplicate_class_def, IDecl->getName()); 96 else { 97 IDecl->setLocation(AtInterfaceLoc); 98 IDecl->setForwardDecl(false); 99 } 100 } else { 101 IDecl = ObjCInterfaceDecl::Create(Context, AtInterfaceLoc, 102 ClassName, ClassLoc); 103 104 ObjCInterfaceDecls[ClassName] = IDecl; 105 // Remember that this needs to be removed when the scope is popped. 106 TUScope->AddDecl(IDecl); 107 } 108 109 if (SuperName) { 110 ObjCInterfaceDecl* SuperClassEntry = 0; 111 // Check if a different kind of symbol declared in this scope. 112 PrevDecl = LookupDecl(SuperName, Decl::IDNS_Ordinary, TUScope); 113 if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { 114 Diag(SuperLoc, diag::err_redefinition_different_kind, 115 SuperName->getName()); 116 Diag(PrevDecl->getLocation(), diag::err_previous_definition); 117 } 118 else { 119 // Check that super class is previously defined 120 SuperClassEntry = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); 121 122 if (!SuperClassEntry || SuperClassEntry->isForwardDecl()) { 123 Diag(SuperLoc, diag::err_undef_superclass, 124 SuperClassEntry ? SuperClassEntry->getName() 125 : SuperName->getName(), 126 ClassName->getName(), SourceRange(AtInterfaceLoc, ClassLoc)); 127 } 128 } 129 IDecl->setSuperClass(SuperClassEntry); 130 IDecl->setSuperClassLoc(SuperLoc); 131 IDecl->setLocEnd(SuperLoc); 132 } else { // we have a root class. 133 IDecl->setLocEnd(ClassLoc); 134 } 135 136 /// Check then save referenced protocols 137 if (NumProtocols) { 138 llvm::SmallVector<ObjCProtocolDecl*, 8> RefProtos; 139 for (unsigned int i = 0; i != NumProtocols; i++) { 140 ObjCProtocolDecl* RefPDecl = ObjCProtocols[ProtocolNames[i].first]; 141 if (!RefPDecl) 142 Diag(ProtocolNames[i].second, diag::err_undeclared_protocol, 143 ProtocolNames[i].first->getName()); 144 else { 145 if (RefPDecl->isForwardDecl()) 146 Diag(ProtocolNames[i].second, diag::warn_undef_protocolref, 147 ProtocolNames[i].first->getName()); 148 RefProtos.push_back(RefPDecl); 149 } 150 } 151 if (!RefProtos.empty()) 152 IDecl->addReferencedProtocols(&RefProtos[0], RefProtos.size()); 153 IDecl->setLocEnd(EndProtoLoc); 154 } 155 return IDecl; 156} 157 158/// ActOnCompatiblityAlias - this action is called after complete parsing of 159/// @compaatibility_alias declaration. It sets up the alias relationships. 160Sema::DeclTy *Sema::ActOnCompatiblityAlias(SourceLocation AtLoc, 161 IdentifierInfo *AliasName, 162 SourceLocation AliasLocation, 163 IdentifierInfo *ClassName, 164 SourceLocation ClassLocation) { 165 // Look for previous declaration of alias name 166 Decl *ADecl = LookupDecl(AliasName, Decl::IDNS_Ordinary, TUScope); 167 if (ADecl) { 168 if (isa<ObjCCompatibleAliasDecl>(ADecl)) { 169 Diag(AliasLocation, diag::warn_previous_alias_decl); 170 Diag(ADecl->getLocation(), diag::warn_previous_declaration); 171 } 172 else { 173 Diag(AliasLocation, diag::err_conflicting_aliasing_type, 174 AliasName->getName()); 175 Diag(ADecl->getLocation(), diag::err_previous_declaration); 176 } 177 return 0; 178 } 179 // Check for class declaration 180 Decl *CDeclU = LookupDecl(ClassName, Decl::IDNS_Ordinary, TUScope); 181 ObjCInterfaceDecl *CDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDeclU); 182 if (CDecl == 0) { 183 Diag(ClassLocation, diag::warn_undef_interface, ClassName->getName()); 184 if (CDeclU) 185 Diag(CDeclU->getLocation(), diag::warn_previous_declaration); 186 return 0; 187 } 188 189 // Everything checked out, instantiate a new alias declaration AST. 190 ObjCCompatibleAliasDecl *AliasDecl = 191 ObjCCompatibleAliasDecl::Create(Context, AtLoc, AliasName, CDecl); 192 193 ObjCAliasDecls[AliasName] = AliasDecl; 194 TUScope->AddDecl(AliasDecl); 195 return AliasDecl; 196} 197 198Sema::DeclTy * 199Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc, 200 IdentifierInfo *ProtocolName, 201 SourceLocation ProtocolLoc, 202 DeclTy * const *ProtoRefs, 203 unsigned NumProtoRefs, 204 SourceLocation EndProtoLoc) { 205 assert(ProtocolName && "Missing protocol identifier"); 206 ObjCProtocolDecl *PDecl = ObjCProtocols[ProtocolName]; 207 if (PDecl) { 208 // Protocol already seen. Better be a forward protocol declaration 209 if (!PDecl->isForwardDecl()) { 210 Diag(ProtocolLoc, diag::err_duplicate_protocol_def, 211 ProtocolName->getName()); 212 // Just return the protocol we already had. 213 // FIXME: don't leak the objects passed in! 214 return PDecl; 215 } 216 217 PDecl->setForwardDecl(false); 218 } else { 219 PDecl = ObjCProtocolDecl::Create(Context, AtProtoInterfaceLoc,ProtocolName); 220 PDecl->setForwardDecl(false); 221 ObjCProtocols[ProtocolName] = PDecl; 222 } 223 224 if (NumProtoRefs) { 225 /// Check then save referenced protocols. 226 PDecl->addReferencedProtocols((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs); 227 PDecl->setLocEnd(EndProtoLoc); 228 } 229 return PDecl; 230} 231 232/// FindProtocolDeclaration - This routine looks up protocols and 233/// issuer error if they are not declared. It returns list of protocol 234/// declarations in its 'Protocols' argument. 235void 236Sema::FindProtocolDeclaration(bool WarnOnDeclarations, 237 const IdentifierLocPair *ProtocolId, 238 unsigned NumProtocols, 239 llvm::SmallVectorImpl<DeclTy*> &Protocols) { 240 for (unsigned i = 0; i != NumProtocols; ++i) { 241 ObjCProtocolDecl *PDecl = ObjCProtocols[ProtocolId[i].first]; 242 if (!PDecl) { 243 Diag(ProtocolId[i].second, diag::err_undeclared_protocol, 244 ProtocolId[i].first->getName()); 245 continue; 246 } 247 248 // If this is a forward declaration and we are supposed to warn in this 249 // case, do it. 250 if (WarnOnDeclarations && PDecl->isForwardDecl()) 251 Diag(ProtocolId[i].second, diag::warn_undef_protocolref, 252 ProtocolId[i].first->getName()); 253 Protocols.push_back(PDecl); 254 } 255} 256 257/// DiagnosePropertyMismatch - Compares two properties for their 258/// attributes and types and warns on a variety of inconsistancies. 259/// 260void 261Sema::DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 262 ObjCPropertyDecl *SuperProperty, 263 const char *inheritedName) { 264 ObjCPropertyDecl::PropertyAttributeKind CAttr = 265 Property->getPropertyAttributes(); 266 ObjCPropertyDecl::PropertyAttributeKind SAttr = 267 SuperProperty->getPropertyAttributes(); 268 if ((CAttr & ObjCPropertyDecl::OBJC_PR_readonly) 269 && (SAttr & ObjCPropertyDecl::OBJC_PR_readwrite)) 270 Diag(Property->getLocation(), diag::warn_readonly_property, 271 Property->getName(), inheritedName); 272 if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy) 273 != (SAttr & ObjCPropertyDecl::OBJC_PR_copy)) 274 Diag(Property->getLocation(), diag::warn_property_attribute, 275 Property->getName(), "copy", inheritedName, 276 SourceRange()); 277 else if ((CAttr & ObjCPropertyDecl::OBJC_PR_retain) 278 != (SAttr & ObjCPropertyDecl::OBJC_PR_retain)) 279 Diag(Property->getLocation(), diag::warn_property_attribute, 280 Property->getName(), "retain", inheritedName, 281 SourceRange()); 282 283 if ((CAttr & ObjCPropertyDecl::OBJC_PR_nonatomic) 284 != (SAttr & ObjCPropertyDecl::OBJC_PR_nonatomic)) 285 Diag(Property->getLocation(), diag::warn_property_attribute, 286 Property->getName(), "atomic", inheritedName, 287 SourceRange()); 288 if (Property->getSetterName() != SuperProperty->getSetterName()) 289 Diag(Property->getLocation(), diag::warn_property_attribute, 290 Property->getName(), "setter", inheritedName, 291 SourceRange()); 292 if (Property->getGetterName() != SuperProperty->getGetterName()) 293 Diag(Property->getLocation(), diag::warn_property_attribute, 294 Property->getName(), "getter", inheritedName, 295 SourceRange()); 296 297 if (Property->getCanonicalType() != SuperProperty->getCanonicalType()) 298 Diag(Property->getLocation(), diag::warn_property_type, 299 Property->getType().getAsString(), 300 inheritedName); 301 302} 303 304/// ComparePropertiesInBaseAndSuper - This routine compares property 305/// declarations in base and its super class, if any, and issues 306/// diagnostics in a variety of inconsistant situations. 307/// 308void 309Sema::ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl) { 310 ObjCInterfaceDecl *SDecl = IDecl->getSuperClass(); 311 if (!SDecl) 312 return; 313 for (ObjCInterfaceDecl::classprop_iterator S = SDecl->classprop_begin(), 314 E = SDecl->classprop_end(); S != E; ++S) { 315 ObjCPropertyDecl *SuperPDecl = (*S); 316 // Does property in super class has declaration in current class? 317 for (ObjCInterfaceDecl::classprop_iterator I = IDecl->classprop_begin(), 318 E = IDecl->classprop_end(); I != E; ++I) { 319 ObjCPropertyDecl *PDecl = (*I); 320 if (SuperPDecl->getIdentifier() == PDecl->getIdentifier()) 321 DiagnosePropertyMismatch(PDecl, SuperPDecl, SDecl->getName()); 322 } 323 } 324} 325 326/// MergeOneProtocolPropertiesIntoClass - This routine goes thru the list 327/// of properties declared in a protocol and adds them to the list 328/// of properties for current class if it is not there already. 329void 330Sema::MergeOneProtocolPropertiesIntoClass(ObjCInterfaceDecl *IDecl, 331 ObjCProtocolDecl *PDecl) 332{ 333 llvm::SmallVector<ObjCPropertyDecl*, 16> mergeProperties; 334 for (ObjCProtocolDecl::classprop_iterator P = PDecl->classprop_begin(), 335 E = PDecl->classprop_end(); P != E; ++P) { 336 ObjCPropertyDecl *Pr = (*P); 337 ObjCInterfaceDecl::classprop_iterator CP, CE; 338 // Is this property already in class's list of properties? 339 for (CP = IDecl->classprop_begin(), CE = IDecl->classprop_end(); 340 CP != CE; ++CP) 341 if ((*CP)->getIdentifier() == Pr->getIdentifier()) 342 break; 343 if (CP == CE) 344 // Add this property to list of properties for thie class. 345 mergeProperties.push_back(Pr); 346 else 347 // Property protocol already exist in class. Diagnose any mismatch. 348 DiagnosePropertyMismatch((*CP), Pr, PDecl->getName()); 349 } 350 IDecl->mergeProperties(&mergeProperties[0], mergeProperties.size()); 351} 352 353/// MergeProtocolPropertiesIntoClass - This routine merges properties 354/// declared in 'MergeItsProtocols' objects (which can be a class or an 355/// inherited protocol into the list of properties for class 'IDecl' 356/// 357 358void 359Sema::MergeProtocolPropertiesIntoClass(ObjCInterfaceDecl *IDecl, 360 DeclTy *MergeItsProtocols) { 361 Decl *ClassDecl = static_cast<Decl *>(MergeItsProtocols); 362 if (ObjCInterfaceDecl *MDecl = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) { 363 for (ObjCInterfaceDecl::protocol_iterator P = MDecl->protocol_begin(), 364 E = MDecl->protocol_end(); P != E; ++P) 365 // Merge properties of class (*P) into IDECL's 366 MergeOneProtocolPropertiesIntoClass(IDecl, *P); 367 368 // Go thru the list of protocols for this class and recursively merge 369 // their properties into this class as well. 370 for (ObjCInterfaceDecl::protocol_iterator P = IDecl->protocol_begin(), 371 E = IDecl->protocol_end(); P != E; ++P) 372 MergeProtocolPropertiesIntoClass(IDecl, *P); 373 } else { 374 ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl); 375 for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(), 376 E = MD->protocol_end(); P != E; ++P) 377 MergeOneProtocolPropertiesIntoClass(IDecl, (*P)); 378 } 379} 380 381/// ActOnForwardProtocolDeclaration - 382Action::DeclTy * 383Sema::ActOnForwardProtocolDeclaration(SourceLocation AtProtocolLoc, 384 const IdentifierLocPair *IdentList, 385 unsigned NumElts) { 386 llvm::SmallVector<ObjCProtocolDecl*, 32> Protocols; 387 388 for (unsigned i = 0; i != NumElts; ++i) { 389 IdentifierInfo *Ident = IdentList[i].first; 390 ObjCProtocolDecl *&PDecl = ObjCProtocols[Ident]; 391 if (PDecl == 0) // Not already seen? 392 PDecl = ObjCProtocolDecl::Create(Context, IdentList[i].second, Ident); 393 394 Protocols.push_back(PDecl); 395 } 396 return ObjCForwardProtocolDecl::Create(Context, AtProtocolLoc, 397 &Protocols[0], Protocols.size()); 398} 399 400Sema::DeclTy *Sema:: 401ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 402 IdentifierInfo *ClassName, SourceLocation ClassLoc, 403 IdentifierInfo *CategoryName, 404 SourceLocation CategoryLoc, 405 const IdentifierLocPair *ProtoRefNames, 406 unsigned NumProtoRefs, 407 SourceLocation EndProtoLoc) { 408 ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName); 409 410 ObjCCategoryDecl *CDecl = 411 ObjCCategoryDecl::Create(Context, AtInterfaceLoc, CategoryName); 412 CDecl->setClassInterface(IDecl); 413 414 /// Check that class of this category is already completely declared. 415 if (!IDecl || IDecl->isForwardDecl()) 416 Diag(ClassLoc, diag::err_undef_interface, ClassName->getName()); 417 else { 418 /// Check for duplicate interface declaration for this category 419 ObjCCategoryDecl *CDeclChain; 420 for (CDeclChain = IDecl->getCategoryList(); CDeclChain; 421 CDeclChain = CDeclChain->getNextClassCategory()) { 422 if (CategoryName && CDeclChain->getIdentifier() == CategoryName) { 423 Diag(CategoryLoc, diag::warn_dup_category_def, ClassName->getName(), 424 CategoryName->getName()); 425 break; 426 } 427 } 428 if (!CDeclChain) 429 CDecl->insertNextClassCategory(); 430 } 431 432 if (NumProtoRefs) { 433 llvm::SmallVector<ObjCProtocolDecl*, 32> RefProtocols; 434 /// Check and then save the referenced protocols. 435 for (unsigned int i = 0; i != NumProtoRefs; i++) { 436 ObjCProtocolDecl* RefPDecl = ObjCProtocols[ProtoRefNames[i].first]; 437 if (!RefPDecl) 438 Diag(ProtoRefNames[i].second, diag::err_undeclared_protocol, 439 ProtoRefNames[i].first->getName()); 440 else { 441 if (RefPDecl->isForwardDecl()) 442 Diag(ProtoRefNames[i].second, diag::warn_undef_protocolref, 443 ProtoRefNames[i].first->getName()); 444 RefProtocols.push_back(RefPDecl); 445 } 446 } 447 if (!RefProtocols.empty()) 448 CDecl->addReferencedProtocols(&RefProtocols[0], RefProtocols.size()); 449 } 450 CDecl->setLocEnd(EndProtoLoc); 451 return CDecl; 452} 453 454/// ActOnStartCategoryImplementation - Perform semantic checks on the 455/// category implementation declaration and build an ObjCCategoryImplDecl 456/// object. 457Sema::DeclTy *Sema::ActOnStartCategoryImplementation( 458 SourceLocation AtCatImplLoc, 459 IdentifierInfo *ClassName, SourceLocation ClassLoc, 460 IdentifierInfo *CatName, SourceLocation CatLoc) { 461 ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName); 462 ObjCCategoryImplDecl *CDecl = 463 ObjCCategoryImplDecl::Create(Context, AtCatImplLoc, CatName, IDecl); 464 /// Check that class of this category is already completely declared. 465 if (!IDecl || IDecl->isForwardDecl()) 466 Diag(ClassLoc, diag::err_undef_interface, ClassName->getName()); 467 468 /// TODO: Check that CatName, category name, is not used in another 469 // implementation. 470 return CDecl; 471} 472 473Sema::DeclTy *Sema::ActOnStartClassImplementation( 474 SourceLocation AtClassImplLoc, 475 IdentifierInfo *ClassName, SourceLocation ClassLoc, 476 IdentifierInfo *SuperClassname, 477 SourceLocation SuperClassLoc) { 478 ObjCInterfaceDecl* IDecl = 0; 479 // Check for another declaration kind with the same name. 480 Decl *PrevDecl = LookupDecl(ClassName, Decl::IDNS_Ordinary, TUScope); 481 if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { 482 Diag(ClassLoc, diag::err_redefinition_different_kind, 483 ClassName->getName()); 484 Diag(PrevDecl->getLocation(), diag::err_previous_definition); 485 } 486 else { 487 // Is there an interface declaration of this class; if not, warn! 488 IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); 489 if (!IDecl) 490 Diag(ClassLoc, diag::warn_undef_interface, ClassName->getName()); 491 } 492 493 // Check that super class name is valid class name 494 ObjCInterfaceDecl* SDecl = 0; 495 if (SuperClassname) { 496 // Check if a different kind of symbol declared in this scope. 497 PrevDecl = LookupDecl(SuperClassname, Decl::IDNS_Ordinary, TUScope); 498 if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { 499 Diag(SuperClassLoc, diag::err_redefinition_different_kind, 500 SuperClassname->getName()); 501 Diag(PrevDecl->getLocation(), diag::err_previous_definition); 502 } 503 else { 504 SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); 505 if (!SDecl) 506 Diag(SuperClassLoc, diag::err_undef_superclass, 507 SuperClassname->getName(), ClassName->getName()); 508 else if (IDecl && IDecl->getSuperClass() != SDecl) { 509 // This implementation and its interface do not have the same 510 // super class. 511 Diag(SuperClassLoc, diag::err_conflicting_super_class, 512 SDecl->getName()); 513 Diag(SDecl->getLocation(), diag::err_previous_definition); 514 } 515 } 516 } 517 518 if (!IDecl) { 519 // Legacy case of @implementation with no corresponding @interface. 520 // Build, chain & install the interface decl into the identifier. 521 IDecl = ObjCInterfaceDecl::Create(Context, AtClassImplLoc, ClassName, 522 ClassLoc, false, true); 523 ObjCInterfaceDecls[ClassName] = IDecl; 524 IDecl->setSuperClass(SDecl); 525 IDecl->setLocEnd(ClassLoc); 526 527 // Remember that this needs to be removed when the scope is popped. 528 TUScope->AddDecl(IDecl); 529 } 530 531 ObjCImplementationDecl* IMPDecl = 532 ObjCImplementationDecl::Create(Context, AtClassImplLoc, ClassName, 533 IDecl, SDecl); 534 535 // Check that there is no duplicate implementation of this class. 536 if (ObjCImplementations[ClassName]) 537 // FIXME: Don't leak everything! 538 Diag(ClassLoc, diag::err_dup_implementation_class, ClassName->getName()); 539 else // add it to the list. 540 ObjCImplementations[ClassName] = IMPDecl; 541 return IMPDecl; 542} 543 544void Sema::CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 545 ObjCIvarDecl **ivars, unsigned numIvars, 546 SourceLocation RBrace) { 547 assert(ImpDecl && "missing implementation decl"); 548 ObjCInterfaceDecl* IDecl = getObjCInterfaceDecl(ImpDecl->getIdentifier()); 549 if (!IDecl) 550 return; 551 /// Check case of non-existing @interface decl. 552 /// (legacy objective-c @implementation decl without an @interface decl). 553 /// Add implementations's ivar to the synthesize class's ivar list. 554 if (IDecl->ImplicitInterfaceDecl()) { 555 IDecl->addInstanceVariablesToClass(ivars, numIvars, RBrace); 556 return; 557 } 558 // If implementation has empty ivar list, just return. 559 if (numIvars == 0) 560 return; 561 562 assert(ivars && "missing @implementation ivars"); 563 564 // Check interface's Ivar list against those in the implementation. 565 // names and types must match. 566 // 567 unsigned j = 0; 568 ObjCInterfaceDecl::ivar_iterator 569 IVI = IDecl->ivar_begin(), IVE = IDecl->ivar_end(); 570 for (; numIvars > 0 && IVI != IVE; ++IVI) { 571 ObjCIvarDecl* ImplIvar = ivars[j++]; 572 ObjCIvarDecl* ClsIvar = *IVI; 573 assert (ImplIvar && "missing implementation ivar"); 574 assert (ClsIvar && "missing class ivar"); 575 if (ImplIvar->getCanonicalType() != ClsIvar->getCanonicalType()) { 576 Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_type, 577 ImplIvar->getIdentifier()->getName()); 578 Diag(ClsIvar->getLocation(), diag::err_previous_definition, 579 ClsIvar->getIdentifier()->getName()); 580 } 581 // TODO: Two mismatched (unequal width) Ivar bitfields should be diagnosed 582 // as error. 583 else if (ImplIvar->getIdentifier() != ClsIvar->getIdentifier()) { 584 Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_name, 585 ImplIvar->getIdentifier()->getName()); 586 Diag(ClsIvar->getLocation(), diag::err_previous_definition, 587 ClsIvar->getIdentifier()->getName()); 588 return; 589 } 590 --numIvars; 591 } 592 593 if (numIvars > 0) 594 Diag(ivars[j]->getLocation(), diag::err_inconsistant_ivar_count); 595 else if (IVI != IVE) 596 Diag((*IVI)->getLocation(), diag::err_inconsistant_ivar_count); 597} 598 599void Sema::WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 600 bool &IncompleteImpl) { 601 if (!IncompleteImpl) { 602 Diag(ImpLoc, diag::warn_incomplete_impl); 603 IncompleteImpl = true; 604 } 605 Diag(ImpLoc, diag::warn_undef_method_impl, method->getSelector().getName()); 606} 607 608/// CheckProtocolMethodDefs - This routine checks unimplemented methods 609/// Declared in protocol, and those referenced by it. 610void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc, 611 ObjCProtocolDecl *PDecl, 612 bool& IncompleteImpl, 613 const llvm::DenseSet<Selector> &InsMap, 614 const llvm::DenseSet<Selector> &ClsMap) { 615 // check unimplemented instance methods. 616 for (ObjCProtocolDecl::instmeth_iterator I = PDecl->instmeth_begin(), 617 E = PDecl->instmeth_end(); I != E; ++I) { 618 ObjCMethodDecl *method = *I; 619 if (!InsMap.count(method->getSelector()) && 620 method->getImplementationControl() != ObjCMethodDecl::Optional) 621 WarnUndefinedMethod(ImpLoc, method, IncompleteImpl); 622 } 623 // check unimplemented class methods 624 for (ObjCProtocolDecl::classmeth_iterator I = PDecl->classmeth_begin(), 625 E = PDecl->classmeth_end(); I != E; ++I) { 626 ObjCMethodDecl *method = *I; 627 if (!ClsMap.count(method->getSelector()) && 628 method->getImplementationControl() != ObjCMethodDecl::Optional) 629 WarnUndefinedMethod(ImpLoc, method, IncompleteImpl); 630 } 631 // Check on this protocols's referenced protocols, recursively. 632 for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(), 633 E = PDecl->protocol_end(); PI != E; ++PI) 634 CheckProtocolMethodDefs(ImpLoc, *PI, IncompleteImpl, InsMap, ClsMap); 635} 636 637void Sema::ImplMethodsVsClassMethods(ObjCImplementationDecl* IMPDecl, 638 ObjCInterfaceDecl* IDecl) { 639 llvm::DenseSet<Selector> InsMap; 640 // Check and see if instance methods in class interface have been 641 // implemented in the implementation class. 642 for (ObjCImplementationDecl::instmeth_iterator I = IMPDecl->instmeth_begin(), 643 E = IMPDecl->instmeth_end(); I != E; ++I) 644 InsMap.insert((*I)->getSelector()); 645 646 bool IncompleteImpl = false; 647 for (ObjCInterfaceDecl::instmeth_iterator I = IDecl->instmeth_begin(), 648 E = IDecl->instmeth_end(); I != E; ++I) 649 if (!(*I)->isSynthesized() && !InsMap.count((*I)->getSelector())) 650 WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl); 651 652 llvm::DenseSet<Selector> ClsMap; 653 // Check and see if class methods in class interface have been 654 // implemented in the implementation class. 655 for (ObjCImplementationDecl::classmeth_iterator I =IMPDecl->classmeth_begin(), 656 E = IMPDecl->classmeth_end(); I != E; ++I) 657 ClsMap.insert((*I)->getSelector()); 658 659 for (ObjCInterfaceDecl::classmeth_iterator I = IDecl->classmeth_begin(), 660 E = IDecl->classmeth_end(); I != E; ++I) 661 if (!ClsMap.count((*I)->getSelector())) 662 WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl); 663 664 // Check the protocol list for unimplemented methods in the @implementation 665 // class. 666 const ObjCList<ObjCProtocolDecl> &Protocols = 667 IDecl->getReferencedProtocols(); 668 for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(), 669 E = Protocols.end(); I != E; ++I) 670 CheckProtocolMethodDefs(IMPDecl->getLocation(), *I, 671 IncompleteImpl, InsMap, ClsMap); 672} 673 674/// ImplCategoryMethodsVsIntfMethods - Checks that methods declared in the 675/// category interface is implemented in the category @implementation. 676void Sema::ImplCategoryMethodsVsIntfMethods(ObjCCategoryImplDecl *CatImplDecl, 677 ObjCCategoryDecl *CatClassDecl) { 678 llvm::DenseSet<Selector> InsMap; 679 // Check and see if instance methods in category interface have been 680 // implemented in its implementation class. 681 for (ObjCCategoryImplDecl::instmeth_iterator I =CatImplDecl->instmeth_begin(), 682 E = CatImplDecl->instmeth_end(); I != E; ++I) 683 InsMap.insert((*I)->getSelector()); 684 685 bool IncompleteImpl = false; 686 for (ObjCCategoryDecl::instmeth_iterator I = CatClassDecl->instmeth_begin(), 687 E = CatClassDecl->instmeth_end(); I != E; ++I) 688 if (!InsMap.count((*I)->getSelector())) 689 WarnUndefinedMethod(CatImplDecl->getLocation(), *I, IncompleteImpl); 690 691 llvm::DenseSet<Selector> ClsMap; 692 // Check and see if class methods in category interface have been 693 // implemented in its implementation class. 694 for (ObjCCategoryImplDecl::classmeth_iterator 695 I = CatImplDecl->classmeth_begin(), E = CatImplDecl->classmeth_end(); 696 I != E; ++I) 697 ClsMap.insert((*I)->getSelector()); 698 699 for (ObjCCategoryDecl::classmeth_iterator I = CatClassDecl->classmeth_begin(), 700 E = CatClassDecl->classmeth_end(); I != E; ++I) 701 if (!ClsMap.count((*I)->getSelector())) 702 WarnUndefinedMethod(CatImplDecl->getLocation(), *I, IncompleteImpl); 703 704 // Check the protocol list for unimplemented methods in the @implementation 705 // class. 706 for (ObjCCategoryDecl::protocol_iterator PI = CatClassDecl->protocol_begin(), 707 E = CatClassDecl->protocol_end(); PI != E; ++PI) 708 CheckProtocolMethodDefs(CatImplDecl->getLocation(), *PI, IncompleteImpl, 709 InsMap, ClsMap); 710} 711 712/// ActOnForwardClassDeclaration - 713Action::DeclTy * 714Sema::ActOnForwardClassDeclaration(SourceLocation AtClassLoc, 715 IdentifierInfo **IdentList, unsigned NumElts) 716{ 717 llvm::SmallVector<ObjCInterfaceDecl*, 32> Interfaces; 718 719 for (unsigned i = 0; i != NumElts; ++i) { 720 // Check for another declaration kind with the same name. 721 Decl *PrevDecl = LookupDecl(IdentList[i], Decl::IDNS_Ordinary, TUScope); 722 if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { 723 // GCC apparently allows the following idiom: 724 // 725 // typedef NSObject < XCElementTogglerP > XCElementToggler; 726 // @class XCElementToggler; 727 // 728 // FIXME: Make an extension? 729 TypedefDecl *TDD = dyn_cast<TypedefDecl>(PrevDecl); 730 if (!TDD || !isa<ObjCInterfaceType>(TDD->getUnderlyingType())) { 731 Diag(AtClassLoc, diag::err_redefinition_different_kind, 732 IdentList[i]->getName()); 733 Diag(PrevDecl->getLocation(), diag::err_previous_definition); 734 } 735 } 736 ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); 737 if (!IDecl) { // Not already seen? Make a forward decl. 738 IDecl = ObjCInterfaceDecl::Create(Context, AtClassLoc, IdentList[i], 739 SourceLocation(), true); 740 ObjCInterfaceDecls[IdentList[i]] = IDecl; 741 742 // Remember that this needs to be removed when the scope is popped. 743 TUScope->AddDecl(IDecl); 744 } 745 746 Interfaces.push_back(IDecl); 747 } 748 749 return ObjCClassDecl::Create(Context, AtClassLoc, 750 &Interfaces[0], Interfaces.size()); 751} 752 753 754/// MatchTwoMethodDeclarations - Checks that two methods have matching type and 755/// returns true, or false, accordingly. 756/// TODO: Handle protocol list; such as id<p1,p2> in type comparisons 757bool Sema::MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 758 const ObjCMethodDecl *PrevMethod) { 759 if (Method->getResultType().getCanonicalType() != 760 PrevMethod->getResultType().getCanonicalType()) 761 return false; 762 for (unsigned i = 0, e = Method->getNumParams(); i != e; ++i) { 763 ParmVarDecl *ParamDecl = Method->getParamDecl(i); 764 ParmVarDecl *PrevParamDecl = PrevMethod->getParamDecl(i); 765 if (Context.getCanonicalType(ParamDecl->getType()) != 766 Context.getCanonicalType(PrevParamDecl->getType())) 767 return false; 768 } 769 return true; 770} 771 772void Sema::AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method) { 773 ObjCMethodList &FirstMethod = InstanceMethodPool[Method->getSelector()]; 774 if (!FirstMethod.Method) { 775 // Haven't seen a method with this selector name yet - add it. 776 FirstMethod.Method = Method; 777 FirstMethod.Next = 0; 778 } else { 779 // We've seen a method with this name, now check the type signature(s). 780 bool match = MatchTwoMethodDeclarations(Method, FirstMethod.Method); 781 782 for (ObjCMethodList *Next = FirstMethod.Next; !match && Next; 783 Next = Next->Next) 784 match = MatchTwoMethodDeclarations(Method, Next->Method); 785 786 if (!match) { 787 // We have a new signature for an existing method - add it. 788 // This is extremely rare. Only 1% of Cocoa selectors are "overloaded". 789 struct ObjCMethodList *OMI = new ObjCMethodList(Method, FirstMethod.Next); 790 FirstMethod.Next = OMI; 791 } 792 } 793} 794 795void Sema::AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method) { 796 ObjCMethodList &FirstMethod = FactoryMethodPool[Method->getSelector()]; 797 if (!FirstMethod.Method) { 798 // Haven't seen a method with this selector name yet - add it. 799 FirstMethod.Method = Method; 800 FirstMethod.Next = 0; 801 } else { 802 // We've seen a method with this name, now check the type signature(s). 803 bool match = MatchTwoMethodDeclarations(Method, FirstMethod.Method); 804 805 for (ObjCMethodList *Next = FirstMethod.Next; !match && Next; 806 Next = Next->Next) 807 match = MatchTwoMethodDeclarations(Method, Next->Method); 808 809 if (!match) { 810 // We have a new signature for an existing method - add it. 811 // This is extremely rare. Only 1% of Cocoa selectors are "overloaded". 812 struct ObjCMethodList *OMI = new ObjCMethodList(Method, FirstMethod.Next); 813 FirstMethod.Next = OMI; 814 } 815 } 816} 817 818// Note: For class/category implemenations, allMethods/allProperties is 819// always null. 820void Sema::ActOnAtEnd(SourceLocation AtEndLoc, DeclTy *classDecl, 821 DeclTy **allMethods, unsigned allNum, 822 DeclTy **allProperties, unsigned pNum) { 823 Decl *ClassDecl = static_cast<Decl *>(classDecl); 824 825 // FIXME: If we don't have a ClassDecl, we have an error. We should consider 826 // always passing in a decl. If the decl has an error, isInvalidDecl() 827 // should be true. 828 if (!ClassDecl) 829 return; 830 831 llvm::SmallVector<ObjCMethodDecl*, 32> insMethods; 832 llvm::SmallVector<ObjCMethodDecl*, 16> clsMethods; 833 834 llvm::DenseMap<Selector, const ObjCMethodDecl*> InsMap; 835 llvm::DenseMap<Selector, const ObjCMethodDecl*> ClsMap; 836 837 bool isInterfaceDeclKind = 838 isa<ObjCInterfaceDecl>(ClassDecl) || isa<ObjCCategoryDecl>(ClassDecl) 839 || isa<ObjCProtocolDecl>(ClassDecl); 840 bool checkIdenticalMethods = isa<ObjCImplementationDecl>(ClassDecl); 841 842 if (pNum != 0) { 843 if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) 844 IDecl->addProperties((ObjCPropertyDecl**)allProperties, pNum); 845 else if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) 846 CDecl->addProperties((ObjCPropertyDecl**)allProperties, pNum); 847 else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(ClassDecl)) 848 PDecl->addProperties((ObjCPropertyDecl**)allProperties, pNum); 849 else 850 assert(false && "ActOnAtEnd - property declaration misplaced"); 851 } 852 853 for (unsigned i = 0; i < allNum; i++ ) { 854 ObjCMethodDecl *Method = 855 cast_or_null<ObjCMethodDecl>(static_cast<Decl*>(allMethods[i])); 856 857 if (!Method) continue; // Already issued a diagnostic. 858 if (Method->isInstance()) { 859 /// Check for instance method of the same name with incompatible types 860 const ObjCMethodDecl *&PrevMethod = InsMap[Method->getSelector()]; 861 bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod) 862 : false; 863 if (isInterfaceDeclKind && PrevMethod && !match 864 || checkIdenticalMethods && match) { 865 Diag(Method->getLocation(), diag::error_duplicate_method_decl, 866 Method->getSelector().getName()); 867 Diag(PrevMethod->getLocation(), diag::err_previous_declaration); 868 } else { 869 insMethods.push_back(Method); 870 InsMap[Method->getSelector()] = Method; 871 /// The following allows us to typecheck messages to "id". 872 AddInstanceMethodToGlobalPool(Method); 873 } 874 } 875 else { 876 /// Check for class method of the same name with incompatible types 877 const ObjCMethodDecl *&PrevMethod = ClsMap[Method->getSelector()]; 878 bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod) 879 : false; 880 if (isInterfaceDeclKind && PrevMethod && !match 881 || checkIdenticalMethods && match) { 882 Diag(Method->getLocation(), diag::error_duplicate_method_decl, 883 Method->getSelector().getName()); 884 Diag(PrevMethod->getLocation(), diag::err_previous_declaration); 885 } else { 886 clsMethods.push_back(Method); 887 ClsMap[Method->getSelector()] = Method; 888 /// The following allows us to typecheck messages to "Class". 889 AddFactoryMethodToGlobalPool(Method); 890 } 891 } 892 } 893 894 if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) { 895 // Compares properties declaraed in this class to those of its 896 // super class. 897 ComparePropertiesInBaseAndSuper(I); 898 MergeProtocolPropertiesIntoClass(I, I); 899 for (ObjCInterfaceDecl::classprop_iterator P = I->classprop_begin(), 900 E = I->classprop_end(); P != E; ++P) { 901 // FIXME: It would be really nice if we could avoid this. Injecting 902 // methods into the interface makes it hard to distinguish "real" methods 903 // from synthesized "property" methods (that aren't in the source). 904 // This complicicates the rewriter's life. 905 I->addPropertyMethods(Context, *P, insMethods); 906 } 907 I->addMethods(&insMethods[0], insMethods.size(), 908 &clsMethods[0], clsMethods.size(), AtEndLoc); 909 910 } else if (ObjCProtocolDecl *P = dyn_cast<ObjCProtocolDecl>(ClassDecl)) { 911 P->addMethods(&insMethods[0], insMethods.size(), 912 &clsMethods[0], clsMethods.size(), AtEndLoc); 913 } 914 else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(ClassDecl)) { 915 C->addMethods(&insMethods[0], insMethods.size(), 916 &clsMethods[0], clsMethods.size(), AtEndLoc); 917 } 918 else if (ObjCImplementationDecl *IC = 919 dyn_cast<ObjCImplementationDecl>(ClassDecl)) { 920 IC->setLocEnd(AtEndLoc); 921 if (ObjCInterfaceDecl* IDecl = getObjCInterfaceDecl(IC->getIdentifier())) 922 ImplMethodsVsClassMethods(IC, IDecl); 923 } else { 924 ObjCCategoryImplDecl* CatImplClass = cast<ObjCCategoryImplDecl>(ClassDecl); 925 CatImplClass->setLocEnd(AtEndLoc); 926 ObjCInterfaceDecl* IDecl = CatImplClass->getClassInterface(); 927 // Find category interface decl and then check that all methods declared 928 // in this interface is implemented in the category @implementation. 929 if (IDecl) { 930 for (ObjCCategoryDecl *Categories = IDecl->getCategoryList(); 931 Categories; Categories = Categories->getNextClassCategory()) { 932 if (Categories->getIdentifier() == CatImplClass->getIdentifier()) { 933 ImplCategoryMethodsVsIntfMethods(CatImplClass, Categories); 934 break; 935 } 936 } 937 } 938 } 939} 940 941 942/// CvtQTToAstBitMask - utility routine to produce an AST bitmask for 943/// objective-c's type qualifier from the parser version of the same info. 944static Decl::ObjCDeclQualifier 945CvtQTToAstBitMask(ObjCDeclSpec::ObjCDeclQualifier PQTVal) { 946 Decl::ObjCDeclQualifier ret = Decl::OBJC_TQ_None; 947 if (PQTVal & ObjCDeclSpec::DQ_In) 948 ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_In); 949 if (PQTVal & ObjCDeclSpec::DQ_Inout) 950 ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Inout); 951 if (PQTVal & ObjCDeclSpec::DQ_Out) 952 ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Out); 953 if (PQTVal & ObjCDeclSpec::DQ_Bycopy) 954 ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Bycopy); 955 if (PQTVal & ObjCDeclSpec::DQ_Byref) 956 ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Byref); 957 if (PQTVal & ObjCDeclSpec::DQ_Oneway) 958 ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Oneway); 959 960 return ret; 961} 962 963Sema::DeclTy *Sema::ActOnMethodDeclaration( 964 SourceLocation MethodLoc, SourceLocation EndLoc, 965 tok::TokenKind MethodType, DeclTy *classDecl, 966 ObjCDeclSpec &ReturnQT, TypeTy *ReturnType, 967 Selector Sel, 968 // optional arguments. The number of types/arguments is obtained 969 // from the Sel.getNumArgs(). 970 ObjCDeclSpec *ArgQT, TypeTy **ArgTypes, IdentifierInfo **ArgNames, 971 AttributeList *AttrList, tok::ObjCKeywordKind MethodDeclKind, 972 bool isVariadic) { 973 Decl *ClassDecl = static_cast<Decl*>(classDecl); 974 975 // Make sure we can establish a context for the method. 976 if (!ClassDecl) { 977 Diag(MethodLoc, diag::error_missing_method_context); 978 return 0; 979 } 980 QualType resultDeclType; 981 982 if (ReturnType) 983 resultDeclType = QualType::getFromOpaquePtr(ReturnType); 984 else // get the type for "id". 985 resultDeclType = Context.getObjCIdType(); 986 987 ObjCMethodDecl* ObjCMethod = 988 ObjCMethodDecl::Create(Context, MethodLoc, EndLoc, Sel, resultDeclType, 989 ClassDecl, AttrList, 990 MethodType == tok::minus, isVariadic, 991 false, 992 MethodDeclKind == tok::objc_optional ? 993 ObjCMethodDecl::Optional : 994 ObjCMethodDecl::Required); 995 996 llvm::SmallVector<ParmVarDecl*, 16> Params; 997 998 for (unsigned i = 0; i < Sel.getNumArgs(); i++) { 999 // FIXME: arg->AttrList must be stored too! 1000 QualType argType; 1001 1002 if (ArgTypes[i]) 1003 argType = QualType::getFromOpaquePtr(ArgTypes[i]); 1004 else 1005 argType = Context.getObjCIdType(); 1006 ParmVarDecl* Param = ParmVarDecl::Create(Context, ObjCMethod, 1007 SourceLocation(/*FIXME*/), 1008 ArgNames[i], argType, 1009 VarDecl::None, 0, 0); 1010 Param->setObjCDeclQualifier( 1011 CvtQTToAstBitMask(ArgQT[i].getObjCDeclQualifier())); 1012 Params.push_back(Param); 1013 } 1014 1015 ObjCMethod->setMethodParams(&Params[0], Sel.getNumArgs()); 1016 ObjCMethod->setObjCDeclQualifier( 1017 CvtQTToAstBitMask(ReturnQT.getObjCDeclQualifier())); 1018 const ObjCMethodDecl *PrevMethod = 0; 1019 1020 // For implementations (which can be very "coarse grain"), we add the 1021 // method now. This allows the AST to implement lookup methods that work 1022 // incrementally (without waiting until we parse the @end). It also allows 1023 // us to flag multiple declaration errors as they occur. 1024 if (ObjCImplementationDecl *ImpDecl = 1025 dyn_cast<ObjCImplementationDecl>(ClassDecl)) { 1026 if (MethodType == tok::minus) { 1027 PrevMethod = ImpDecl->getInstanceMethod(Sel); 1028 ImpDecl->addInstanceMethod(ObjCMethod); 1029 } else { 1030 PrevMethod = ImpDecl->getClassMethod(Sel); 1031 ImpDecl->addClassMethod(ObjCMethod); 1032 } 1033 } 1034 else if (ObjCCategoryImplDecl *CatImpDecl = 1035 dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) { 1036 if (MethodType == tok::minus) { 1037 PrevMethod = CatImpDecl->getInstanceMethod(Sel); 1038 CatImpDecl->addInstanceMethod(ObjCMethod); 1039 } else { 1040 PrevMethod = CatImpDecl->getClassMethod(Sel); 1041 CatImpDecl->addClassMethod(ObjCMethod); 1042 } 1043 } 1044 if (PrevMethod) { 1045 // You can never have two method definitions with the same name. 1046 Diag(ObjCMethod->getLocation(), diag::error_duplicate_method_decl, 1047 ObjCMethod->getSelector().getName()); 1048 Diag(PrevMethod->getLocation(), diag::err_previous_declaration); 1049 } 1050 return ObjCMethod; 1051} 1052 1053Sema::DeclTy *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc, 1054 FieldDeclarator &FD, 1055 ObjCDeclSpec &ODS, 1056 Selector GetterSel, 1057 Selector SetterSel, 1058 tok::ObjCKeywordKind MethodImplKind) { 1059 QualType T = GetTypeForDeclarator(FD.D, S); 1060 ObjCPropertyDecl *PDecl = ObjCPropertyDecl::Create(Context, AtLoc, 1061 FD.D.getIdentifier(), T); 1062 // Regardless of setter/getter attribute, we save the default getter/setter 1063 // selector names in anticipation of declaration of setter/getter methods. 1064 PDecl->setGetterName(GetterSel); 1065 PDecl->setSetterName(SetterSel); 1066 1067 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_readonly) 1068 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly); 1069 1070 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_getter) 1071 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter); 1072 1073 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_setter) 1074 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter); 1075 1076 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_assign) 1077 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign); 1078 1079 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_readwrite) 1080 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite); 1081 1082 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_retain) 1083 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain); 1084 1085 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_copy) 1086 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy); 1087 1088 if (ODS.getPropertyAttributes() & ObjCDeclSpec::DQ_PR_nonatomic) 1089 PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic); 1090 1091 if (MethodImplKind == tok::objc_required) 1092 PDecl->setPropertyImplementation(ObjCPropertyDecl::Required); 1093 else if (MethodImplKind == tok::objc_optional) 1094 PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional); 1095 1096 return PDecl; 1097} 1098 1099/// ActOnPropertyImplDecl - This routine performs semantic checks and 1100/// builds the AST node for a property implementation declaration; declared 1101/// as @synthesize or @dynamic. 1102/// 1103Sema::DeclTy *Sema::ActOnPropertyImplDecl(SourceLocation AtLoc, 1104 SourceLocation PropertyLoc, 1105 bool Synthesize, 1106 DeclTy *ClassCatImpDecl, 1107 IdentifierInfo *PropertyId, 1108 IdentifierInfo *PropertyIvar) { 1109 Decl *ClassImpDecl = static_cast<Decl*>(ClassCatImpDecl); 1110 // Make sure we have a context for the property implementation declaration. 1111 if (!ClassImpDecl) { 1112 Diag(AtLoc, diag::error_missing_property_context); 1113 return 0; 1114 } 1115 ObjCPropertyDecl *property = 0; 1116 ObjCInterfaceDecl* IDecl = 0; 1117 // Find the class or category class where this property must have 1118 // a declaration. 1119 ObjCImplementationDecl *IC = 0; 1120 ObjCCategoryImplDecl* CatImplClass = 0; 1121 if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) { 1122 IDecl = getObjCInterfaceDecl(IC->getIdentifier()); 1123 // We always synthesize an interface for an implementation 1124 // without an interface decl. So, IDecl is always non-zero. 1125 assert(IDecl && 1126 "ActOnPropertyImplDecl - @implementation without @interface"); 1127 1128 // Look for this property declaration in the @implementation's @interface 1129 property = IDecl->FindPropertyDeclaration(PropertyId); 1130 if (!property) { 1131 Diag(PropertyLoc, diag::error_bad_property_decl, IDecl->getName()); 1132 return 0; 1133 } 1134 } 1135 else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) { 1136 if (Synthesize) { 1137 Diag(AtLoc, diag::error_synthesize_category_decl); 1138 return 0; 1139 } 1140 IDecl = CatImplClass->getClassInterface(); 1141 if (!IDecl) { 1142 Diag(AtLoc, diag::error_missing_property_interface); 1143 return 0; 1144 } 1145 ObjCCategoryDecl *Category = 1146 IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier()); 1147 1148 // If category for this implementation not found, it is an error which 1149 // has already been reported eralier. 1150 if (!Category) 1151 return 0; 1152 // Look for this property declaration in @implementation's category 1153 property = Category->FindPropertyDeclaration(PropertyId); 1154 if (!property) { 1155 Diag(PropertyLoc, diag::error_bad_category_property_decl, 1156 Category->getName()); 1157 return 0; 1158 } 1159 } 1160 else { 1161 Diag(AtLoc, diag::error_bad_property_context); 1162 return 0; 1163 } 1164 ObjCIvarDecl *Ivar = 0; 1165 // Check that we have a valid, previously declared ivar for @synthesize 1166 if (Synthesize) { 1167 // @synthesize 1168 if (!PropertyIvar) 1169 PropertyIvar = PropertyId; 1170 // Check that this is a previously declared 'ivar' in 'IDecl' interface 1171 Ivar = IDecl->FindIvarDeclaration(PropertyIvar); 1172 if (!Ivar) { 1173 Diag(PropertyLoc, diag::error_missing_property_ivar_decl, 1174 PropertyId->getName()); 1175 return 0; 1176 } 1177 // Check that type of property and its ivar match. 1178 if (Ivar->getCanonicalType() != property->getCanonicalType()) { 1179 Diag(PropertyLoc, diag::error_property_ivar_type, property->getName(), 1180 Ivar->getName()); 1181 return 0; 1182 } 1183 1184 } else if (PropertyIvar) { 1185 // @dynamic 1186 Diag(PropertyLoc, diag::error_dynamic_property_ivar_decl); 1187 return 0; 1188 } 1189 assert (property && "ActOnPropertyImplDecl - property declaration missing"); 1190 ObjCPropertyImplDecl *PIDecl = 1191 ObjCPropertyImplDecl::Create(Context, AtLoc, PropertyLoc, property, 1192 (Synthesize ? 1193 ObjCPropertyImplDecl::OBJC_PR_IMPL_SYNTHSIZE 1194 : ObjCPropertyImplDecl::OBJC_PR_IMPL_DYNAMIC), 1195 Ivar); 1196 if (IC) 1197 IC->addPropertyImplementation(PIDecl); 1198 else 1199 CatImplClass->addPropertyImplementation(PIDecl); 1200 1201 return PIDecl; 1202} 1203