| //===--- SemaDeclObjC.cpp - Semantic Analysis for ObjC Declarations -------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements semantic analysis for Objective C declarations. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "Sema.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/Parse/DeclSpec.h" |
| using namespace clang; |
| |
| /// ActOnStartOfObjCMethodDef - This routine sets up parameters; invisible |
| /// and user declared, in the method definition's AST. |
| void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, DeclTy *D) { |
| assert(getCurMethodDecl() == 0 && "Method parsing confused"); |
| ObjCMethodDecl *MDecl = dyn_cast_or_null<ObjCMethodDecl>((Decl *)D); |
| |
| // If we don't have a valid method decl, simply return. |
| if (!MDecl) |
| return; |
| |
| // Allow the rest of sema to find private method decl implementations. |
| if (MDecl->isInstanceMethod()) |
| AddInstanceMethodToGlobalPool(MDecl); |
| else |
| AddFactoryMethodToGlobalPool(MDecl); |
| |
| // Allow all of Sema to see that we are entering a method definition. |
| PushDeclContext(FnBodyScope, MDecl); |
| |
| ActiveScope = FnBodyScope; |
| |
| // Create Decl objects for each parameter, entrring them in the scope for |
| // binding to their use. |
| |
| // Insert the invisible arguments, self and _cmd! |
| MDecl->createImplicitParams(Context, MDecl->getClassInterface()); |
| |
| PushOnScopeChains(MDecl->getSelfDecl(), FnBodyScope); |
| PushOnScopeChains(MDecl->getCmdDecl(), FnBodyScope); |
| |
| // Introduce all of the other parameters into this scope. |
| for (ObjCMethodDecl::param_iterator PI = MDecl->param_begin(), |
| E = MDecl->param_end(); PI != E; ++PI) |
| if ((*PI)->getIdentifier()) |
| PushOnScopeChains(*PI, FnBodyScope); |
| } |
| |
| Sema::DeclTy *Sema:: |
| ActOnStartClassInterface(SourceLocation AtInterfaceLoc, |
| IdentifierInfo *ClassName, SourceLocation ClassLoc, |
| IdentifierInfo *SuperName, SourceLocation SuperLoc, |
| DeclTy * const *ProtoRefs, unsigned NumProtoRefs, |
| SourceLocation EndProtoLoc, AttributeList *AttrList) { |
| assert(ClassName && "Missing class identifier"); |
| |
| // Check for another declaration kind with the same name. |
| NamedDecl *PrevDecl = LookupName(TUScope, ClassName, LookupOrdinaryName); |
| if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| // Maybe we will complain about the shadowed template parameter. |
| DiagnoseTemplateParameterShadow(ClassLoc, PrevDecl); |
| // Just pretend that we didn't see the previous declaration. |
| PrevDecl = 0; |
| } |
| |
| if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { |
| Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName; |
| Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
| } |
| |
| ObjCInterfaceDecl* IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); |
| if (IDecl) { |
| // Class already seen. Is it a forward declaration? |
| if (!IDecl->isForwardDecl()) { |
| IDecl->setInvalidDecl(); |
| Diag(AtInterfaceLoc, diag::err_duplicate_class_def)<<IDecl->getDeclName(); |
| Diag(IDecl->getLocation(), diag::note_previous_definition); |
| |
| // Return the previous class interface. |
| // FIXME: don't leak the objects passed in! |
| return IDecl; |
| } else { |
| IDecl->setLocation(AtInterfaceLoc); |
| IDecl->setForwardDecl(false); |
| } |
| } else { |
| IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtInterfaceLoc, |
| ClassName, ClassLoc); |
| if (AttrList) |
| ProcessDeclAttributeList(IDecl, AttrList); |
| |
| ObjCInterfaceDecls[ClassName] = IDecl; |
| // FIXME: PushOnScopeChains |
| CurContext->addDecl(IDecl); |
| // Remember that this needs to be removed when the scope is popped. |
| TUScope->AddDecl(IDecl); |
| } |
| |
| if (SuperName) { |
| // Check if a different kind of symbol declared in this scope. |
| PrevDecl = LookupName(TUScope, SuperName, LookupOrdinaryName); |
| |
| ObjCInterfaceDecl *SuperClassDecl = |
| dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); |
| |
| // Diagnose classes that inherit from deprecated classes. |
| if (SuperClassDecl) |
| (void)DiagnoseUseOfDecl(SuperClassDecl, SuperLoc); |
| |
| if (PrevDecl && SuperClassDecl == 0) { |
| // The previous declaration was not a class decl. Check if we have a |
| // typedef. If we do, get the underlying class type. |
| if (const TypedefDecl *TDecl = dyn_cast_or_null<TypedefDecl>(PrevDecl)) { |
| QualType T = TDecl->getUnderlyingType(); |
| if (T->isObjCInterfaceType()) { |
| if (NamedDecl *IDecl = T->getAsObjCInterfaceType()->getDecl()) |
| SuperClassDecl = dyn_cast<ObjCInterfaceDecl>(IDecl); |
| } |
| } |
| |
| // This handles the following case: |
| // |
| // typedef int SuperClass; |
| // @interface MyClass : SuperClass {} @end |
| // |
| if (!SuperClassDecl) { |
| Diag(SuperLoc, diag::err_redefinition_different_kind) << SuperName; |
| Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
| } |
| } |
| |
| if (!dyn_cast_or_null<TypedefDecl>(PrevDecl)) { |
| if (!SuperClassDecl) |
| Diag(SuperLoc, diag::err_undef_superclass) |
| << SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc); |
| else if (SuperClassDecl->isForwardDecl()) |
| Diag(SuperLoc, diag::err_undef_superclass) |
| << SuperClassDecl->getDeclName() << ClassName |
| << SourceRange(AtInterfaceLoc, ClassLoc); |
| } |
| IDecl->setSuperClass(SuperClassDecl); |
| IDecl->setSuperClassLoc(SuperLoc); |
| IDecl->setLocEnd(SuperLoc); |
| } else { // we have a root class. |
| IDecl->setLocEnd(ClassLoc); |
| } |
| |
| /// Check then save referenced protocols. |
| if (NumProtoRefs) { |
| IDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs, |
| Context); |
| IDecl->setLocEnd(EndProtoLoc); |
| } |
| |
| CheckObjCDeclScope(IDecl); |
| return IDecl; |
| } |
| |
| /// ActOnCompatiblityAlias - this action is called after complete parsing of |
| /// @compatibility_alias declaration. It sets up the alias relationships. |
| Sema::DeclTy *Sema::ActOnCompatiblityAlias(SourceLocation AtLoc, |
| IdentifierInfo *AliasName, |
| SourceLocation AliasLocation, |
| IdentifierInfo *ClassName, |
| SourceLocation ClassLocation) { |
| // Look for previous declaration of alias name |
| NamedDecl *ADecl = LookupName(TUScope, AliasName, LookupOrdinaryName); |
| if (ADecl) { |
| if (isa<ObjCCompatibleAliasDecl>(ADecl)) |
| Diag(AliasLocation, diag::warn_previous_alias_decl); |
| else |
| Diag(AliasLocation, diag::err_conflicting_aliasing_type) << AliasName; |
| Diag(ADecl->getLocation(), diag::note_previous_declaration); |
| return 0; |
| } |
| // Check for class declaration |
| NamedDecl *CDeclU = LookupName(TUScope, ClassName, LookupOrdinaryName); |
| if (const TypedefDecl *TDecl = dyn_cast_or_null<TypedefDecl>(CDeclU)) { |
| QualType T = TDecl->getUnderlyingType(); |
| if (T->isObjCInterfaceType()) { |
| if (NamedDecl *IDecl = T->getAsObjCInterfaceType()->getDecl()) { |
| ClassName = IDecl->getIdentifier(); |
| CDeclU = LookupName(TUScope, ClassName, LookupOrdinaryName); |
| } |
| } |
| } |
| ObjCInterfaceDecl *CDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDeclU); |
| if (CDecl == 0) { |
| Diag(ClassLocation, diag::warn_undef_interface) << ClassName; |
| if (CDeclU) |
| Diag(CDeclU->getLocation(), diag::note_previous_declaration); |
| return 0; |
| } |
| |
| // Everything checked out, instantiate a new alias declaration AST. |
| ObjCCompatibleAliasDecl *AliasDecl = |
| ObjCCompatibleAliasDecl::Create(Context, CurContext, AtLoc, AliasName, CDecl); |
| |
| ObjCAliasDecls[AliasName] = AliasDecl; |
| |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(AliasDecl); |
| if (!CheckObjCDeclScope(AliasDecl)) |
| TUScope->AddDecl(AliasDecl); |
| |
| return AliasDecl; |
| } |
| |
| void Sema::CheckForwardProtocolDeclarationForCircularDependency( |
| IdentifierInfo *PName, |
| SourceLocation &Ploc, SourceLocation PrevLoc, |
| const ObjCList<ObjCProtocolDecl> &PList) |
| { |
| for (ObjCList<ObjCProtocolDecl>::iterator I = PList.begin(), |
| E = PList.end(); I != E; ++I) { |
| |
| if (ObjCProtocolDecl *PDecl = ObjCProtocols[(*I)->getIdentifier()]) { |
| if (PDecl->getIdentifier() == PName) { |
| Diag(Ploc, diag::err_protocol_has_circular_dependency); |
| Diag(PrevLoc, diag::note_previous_definition); |
| } |
| CheckForwardProtocolDeclarationForCircularDependency(PName, Ploc, |
| PDecl->getLocation(), PDecl->getReferencedProtocols()); |
| } |
| } |
| } |
| |
| Sema::DeclTy * |
| Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc, |
| IdentifierInfo *ProtocolName, |
| SourceLocation ProtocolLoc, |
| DeclTy * const *ProtoRefs, |
| unsigned NumProtoRefs, |
| SourceLocation EndProtoLoc, |
| AttributeList *AttrList) { |
| // FIXME: Deal with AttrList. |
| assert(ProtocolName && "Missing protocol identifier"); |
| ObjCProtocolDecl *PDecl = ObjCProtocols[ProtocolName]; |
| if (PDecl) { |
| // Protocol already seen. Better be a forward protocol declaration |
| if (!PDecl->isForwardDecl()) { |
| PDecl->setInvalidDecl(); |
| Diag(ProtocolLoc, diag::err_duplicate_protocol_def) << ProtocolName; |
| Diag(PDecl->getLocation(), diag::note_previous_definition); |
| // Just return the protocol we already had. |
| // FIXME: don't leak the objects passed in! |
| return PDecl; |
| } |
| ObjCList<ObjCProtocolDecl> PList; |
| PList.set((ObjCProtocolDecl *const*)ProtoRefs, NumProtoRefs, Context); |
| CheckForwardProtocolDeclarationForCircularDependency( |
| ProtocolName, ProtocolLoc, PDecl->getLocation(), PList); |
| PList.Destroy(Context); |
| |
| // Make sure the cached decl gets a valid start location. |
| PDecl->setLocation(AtProtoInterfaceLoc); |
| PDecl->setForwardDecl(false); |
| } else { |
| PDecl = ObjCProtocolDecl::Create(Context, CurContext, |
| AtProtoInterfaceLoc,ProtocolName); |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(PDecl); |
| PDecl->setForwardDecl(false); |
| ObjCProtocols[ProtocolName] = PDecl; |
| } |
| if (AttrList) |
| ProcessDeclAttributeList(PDecl, AttrList); |
| if (NumProtoRefs) { |
| /// Check then save referenced protocols. |
| PDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,Context); |
| PDecl->setLocEnd(EndProtoLoc); |
| } |
| |
| CheckObjCDeclScope(PDecl); |
| return PDecl; |
| } |
| |
| /// FindProtocolDeclaration - This routine looks up protocols and |
| /// issues an error if they are not declared. It returns list of |
| /// protocol declarations in its 'Protocols' argument. |
| void |
| Sema::FindProtocolDeclaration(bool WarnOnDeclarations, |
| const IdentifierLocPair *ProtocolId, |
| unsigned NumProtocols, |
| llvm::SmallVectorImpl<DeclTy*> &Protocols) { |
| for (unsigned i = 0; i != NumProtocols; ++i) { |
| ObjCProtocolDecl *PDecl = ObjCProtocols[ProtocolId[i].first]; |
| if (!PDecl) { |
| Diag(ProtocolId[i].second, diag::err_undeclared_protocol) |
| << ProtocolId[i].first; |
| continue; |
| } |
| |
| (void)DiagnoseUseOfDecl(PDecl, ProtocolId[i].second); |
| |
| // If this is a forward declaration and we are supposed to warn in this |
| // case, do it. |
| if (WarnOnDeclarations && PDecl->isForwardDecl()) |
| Diag(ProtocolId[i].second, diag::warn_undef_protocolref) |
| << ProtocolId[i].first; |
| Protocols.push_back(PDecl); |
| } |
| } |
| |
| /// DiagnosePropertyMismatch - Compares two properties for their |
| /// attributes and types and warns on a variety of inconsistencies. |
| /// |
| void |
| Sema::DiagnosePropertyMismatch(ObjCPropertyDecl *Property, |
| ObjCPropertyDecl *SuperProperty, |
| const IdentifierInfo *inheritedName) { |
| ObjCPropertyDecl::PropertyAttributeKind CAttr = |
| Property->getPropertyAttributes(); |
| ObjCPropertyDecl::PropertyAttributeKind SAttr = |
| SuperProperty->getPropertyAttributes(); |
| if ((CAttr & ObjCPropertyDecl::OBJC_PR_readonly) |
| && (SAttr & ObjCPropertyDecl::OBJC_PR_readwrite)) |
| Diag(Property->getLocation(), diag::warn_readonly_property) |
| << Property->getDeclName() << inheritedName; |
| if ((CAttr & ObjCPropertyDecl::OBJC_PR_copy) |
| != (SAttr & ObjCPropertyDecl::OBJC_PR_copy)) |
| Diag(Property->getLocation(), diag::warn_property_attribute) |
| << Property->getDeclName() << "copy" << inheritedName; |
| else if ((CAttr & ObjCPropertyDecl::OBJC_PR_retain) |
| != (SAttr & ObjCPropertyDecl::OBJC_PR_retain)) |
| Diag(Property->getLocation(), diag::warn_property_attribute) |
| << Property->getDeclName() << "retain" << inheritedName; |
| |
| if ((CAttr & ObjCPropertyDecl::OBJC_PR_nonatomic) |
| != (SAttr & ObjCPropertyDecl::OBJC_PR_nonatomic)) |
| Diag(Property->getLocation(), diag::warn_property_attribute) |
| << Property->getDeclName() << "atomic" << inheritedName; |
| if (Property->getSetterName() != SuperProperty->getSetterName()) |
| Diag(Property->getLocation(), diag::warn_property_attribute) |
| << Property->getDeclName() << "setter" << inheritedName; |
| if (Property->getGetterName() != SuperProperty->getGetterName()) |
| Diag(Property->getLocation(), diag::warn_property_attribute) |
| << Property->getDeclName() << "getter" << inheritedName; |
| |
| QualType LHSType = |
| Context.getCanonicalType(SuperProperty->getType()); |
| QualType RHSType = |
| Context.getCanonicalType(Property->getType()); |
| |
| if (!Context.typesAreCompatible(LHSType, RHSType)) { |
| // FIXME: Incorporate this test with typesAreCompatible. |
| if (LHSType->isObjCQualifiedIdType() && RHSType->isObjCQualifiedIdType()) |
| if (ObjCQualifiedIdTypesAreCompatible(LHSType, RHSType, false)) |
| return; |
| Diag(Property->getLocation(), diag::warn_property_types_are_incompatible) |
| << Property->getType() << SuperProperty->getType() << inheritedName; |
| } |
| } |
| |
| /// ComparePropertiesInBaseAndSuper - This routine compares property |
| /// declarations in base and its super class, if any, and issues |
| /// diagnostics in a variety of inconsistant situations. |
| /// |
| void Sema::ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl) { |
| ObjCInterfaceDecl *SDecl = IDecl->getSuperClass(); |
| if (!SDecl) |
| return; |
| // FIXME: O(N^2) |
| for (ObjCInterfaceDecl::prop_iterator S = SDecl->prop_begin(), |
| E = SDecl->prop_end(); S != E; ++S) { |
| ObjCPropertyDecl *SuperPDecl = (*S); |
| // Does property in super class has declaration in current class? |
| for (ObjCInterfaceDecl::prop_iterator I = IDecl->prop_begin(), |
| E = IDecl->prop_end(); I != E; ++I) { |
| ObjCPropertyDecl *PDecl = (*I); |
| if (SuperPDecl->getIdentifier() == PDecl->getIdentifier()) |
| DiagnosePropertyMismatch(PDecl, SuperPDecl, |
| SDecl->getIdentifier()); |
| } |
| } |
| } |
| |
| /// MergeOneProtocolPropertiesIntoClass - This routine goes thru the list |
| /// of properties declared in a protocol and adds them to the list |
| /// of properties for current class/category if it is not there already. |
| void |
| Sema::MergeOneProtocolPropertiesIntoClass(Decl *CDecl, |
| ObjCProtocolDecl *PDecl) { |
| ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDecl); |
| if (!IDecl) { |
| // Category |
| ObjCCategoryDecl *CatDecl = static_cast<ObjCCategoryDecl*>(CDecl); |
| assert (CatDecl && "MergeOneProtocolPropertiesIntoClass"); |
| for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(), |
| E = PDecl->prop_end(); P != E; ++P) { |
| ObjCPropertyDecl *Pr = (*P); |
| ObjCCategoryDecl::prop_iterator CP, CE; |
| // Is this property already in category's list of properties? |
| for (CP = CatDecl->prop_begin(), CE = CatDecl->prop_end(); |
| CP != CE; ++CP) |
| if ((*CP)->getIdentifier() == Pr->getIdentifier()) |
| break; |
| if (CP != CE) |
| // Property protocol already exist in class. Diagnose any mismatch. |
| DiagnosePropertyMismatch((*CP), Pr, PDecl->getIdentifier()); |
| } |
| return; |
| } |
| for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(), |
| E = PDecl->prop_end(); P != E; ++P) { |
| ObjCPropertyDecl *Pr = (*P); |
| ObjCInterfaceDecl::prop_iterator CP, CE; |
| // Is this property already in class's list of properties? |
| for (CP = IDecl->prop_begin(), CE = IDecl->prop_end(); |
| CP != CE; ++CP) |
| if ((*CP)->getIdentifier() == Pr->getIdentifier()) |
| break; |
| if (CP != CE) |
| // Property protocol already exist in class. Diagnose any mismatch. |
| DiagnosePropertyMismatch((*CP), Pr, PDecl->getIdentifier()); |
| } |
| } |
| |
| /// MergeProtocolPropertiesIntoClass - This routine merges properties |
| /// declared in 'MergeItsProtocols' objects (which can be a class or an |
| /// inherited protocol into the list of properties for class/category 'CDecl' |
| /// |
| void Sema::MergeProtocolPropertiesIntoClass(Decl *CDecl, |
| DeclTy *MergeItsProtocols) { |
| Decl *ClassDecl = static_cast<Decl *>(MergeItsProtocols); |
| ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDecl); |
| |
| if (!IDecl) { |
| // Category |
| ObjCCategoryDecl *CatDecl = static_cast<ObjCCategoryDecl*>(CDecl); |
| assert (CatDecl && "MergeProtocolPropertiesIntoClass"); |
| if (ObjCCategoryDecl *MDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) { |
| for (ObjCCategoryDecl::protocol_iterator P = MDecl->protocol_begin(), |
| E = MDecl->protocol_end(); P != E; ++P) |
| // Merge properties of category (*P) into IDECL's |
| MergeOneProtocolPropertiesIntoClass(CatDecl, *P); |
| |
| // Go thru the list of protocols for this category and recursively merge |
| // their properties into this class as well. |
| for (ObjCCategoryDecl::protocol_iterator P = CatDecl->protocol_begin(), |
| E = CatDecl->protocol_end(); P != E; ++P) |
| MergeProtocolPropertiesIntoClass(CatDecl, *P); |
| } else { |
| ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl); |
| for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(), |
| E = MD->protocol_end(); P != E; ++P) |
| MergeOneProtocolPropertiesIntoClass(CatDecl, (*P)); |
| } |
| return; |
| } |
| |
| if (ObjCInterfaceDecl *MDecl = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) { |
| for (ObjCInterfaceDecl::protocol_iterator P = MDecl->protocol_begin(), |
| E = MDecl->protocol_end(); P != E; ++P) |
| // Merge properties of class (*P) into IDECL's |
| MergeOneProtocolPropertiesIntoClass(IDecl, *P); |
| |
| // Go thru the list of protocols for this class and recursively merge |
| // their properties into this class as well. |
| for (ObjCInterfaceDecl::protocol_iterator P = IDecl->protocol_begin(), |
| E = IDecl->protocol_end(); P != E; ++P) |
| MergeProtocolPropertiesIntoClass(IDecl, *P); |
| } else { |
| ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl); |
| for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(), |
| E = MD->protocol_end(); P != E; ++P) |
| MergeOneProtocolPropertiesIntoClass(IDecl, (*P)); |
| } |
| } |
| |
| /// DiagnoseClassExtensionDupMethods - Check for duplicate declaration of |
| /// a class method in its extension. |
| /// |
| void Sema::DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, |
| ObjCInterfaceDecl *ID) { |
| if (!ID) |
| return; // Possibly due to previous error |
| |
| llvm::DenseMap<Selector, const ObjCMethodDecl*> MethodMap; |
| for (ObjCInterfaceDecl::method_iterator i = ID->meth_begin(), |
| e = ID->meth_end(); i != e; ++i) { |
| ObjCMethodDecl *MD = *i; |
| MethodMap[MD->getSelector()] = MD; |
| } |
| |
| if (MethodMap.empty()) |
| return; |
| for (ObjCCategoryDecl::method_iterator i = CAT->meth_begin(), |
| e = CAT->meth_end(); i != e; ++i) { |
| ObjCMethodDecl *Method = *i; |
| const ObjCMethodDecl *&PrevMethod = MethodMap[Method->getSelector()]; |
| if (PrevMethod && !MatchTwoMethodDeclarations(Method, PrevMethod)) { |
| Diag(Method->getLocation(), diag::err_duplicate_method_decl) |
| << Method->getDeclName(); |
| Diag(PrevMethod->getLocation(), diag::note_previous_declaration); |
| } |
| } |
| } |
| |
| /// ActOnForwardProtocolDeclaration - |
| Action::DeclTy * |
| Sema::ActOnForwardProtocolDeclaration(SourceLocation AtProtocolLoc, |
| const IdentifierLocPair *IdentList, |
| unsigned NumElts, |
| AttributeList *attrList) { |
| llvm::SmallVector<ObjCProtocolDecl*, 32> Protocols; |
| |
| for (unsigned i = 0; i != NumElts; ++i) { |
| IdentifierInfo *Ident = IdentList[i].first; |
| ObjCProtocolDecl *&PDecl = ObjCProtocols[Ident]; |
| if (PDecl == 0) { // Not already seen? |
| PDecl = ObjCProtocolDecl::Create(Context, CurContext, |
| IdentList[i].second, Ident); |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(PDecl); |
| } |
| if (attrList) |
| ProcessDeclAttributeList(PDecl, attrList); |
| Protocols.push_back(PDecl); |
| } |
| |
| ObjCForwardProtocolDecl *PDecl = |
| ObjCForwardProtocolDecl::Create(Context, CurContext, AtProtocolLoc, |
| &Protocols[0], Protocols.size()); |
| CurContext->addDecl(PDecl); |
| CheckObjCDeclScope(PDecl); |
| return PDecl; |
| } |
| |
| Sema::DeclTy *Sema:: |
| ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, |
| IdentifierInfo *ClassName, SourceLocation ClassLoc, |
| IdentifierInfo *CategoryName, |
| SourceLocation CategoryLoc, |
| DeclTy * const *ProtoRefs, |
| unsigned NumProtoRefs, |
| SourceLocation EndProtoLoc) { |
| ObjCCategoryDecl *CDecl = |
| ObjCCategoryDecl::Create(Context, CurContext, AtInterfaceLoc, CategoryName); |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(CDecl); |
| |
| ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName); |
| /// Check that class of this category is already completely declared. |
| if (!IDecl || IDecl->isForwardDecl()) { |
| CDecl->setInvalidDecl(); |
| Diag(ClassLoc, diag::err_undef_interface) << ClassName; |
| return CDecl; |
| } |
| |
| CDecl->setClassInterface(IDecl); |
| |
| // If the interface is deprecated, warn about it. |
| (void)DiagnoseUseOfDecl(IDecl, ClassLoc); |
| |
| /// Check for duplicate interface declaration for this category |
| ObjCCategoryDecl *CDeclChain; |
| for (CDeclChain = IDecl->getCategoryList(); CDeclChain; |
| CDeclChain = CDeclChain->getNextClassCategory()) { |
| if (CategoryName && CDeclChain->getIdentifier() == CategoryName) { |
| Diag(CategoryLoc, diag::warn_dup_category_def) |
| << ClassName << CategoryName; |
| Diag(CDeclChain->getLocation(), diag::note_previous_definition); |
| break; |
| } |
| } |
| if (!CDeclChain) |
| CDecl->insertNextClassCategory(); |
| |
| if (NumProtoRefs) { |
| CDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs,Context); |
| CDecl->setLocEnd(EndProtoLoc); |
| } |
| |
| CheckObjCDeclScope(CDecl); |
| return CDecl; |
| } |
| |
| /// ActOnStartCategoryImplementation - Perform semantic checks on the |
| /// category implementation declaration and build an ObjCCategoryImplDecl |
| /// object. |
| Sema::DeclTy *Sema::ActOnStartCategoryImplementation( |
| SourceLocation AtCatImplLoc, |
| IdentifierInfo *ClassName, SourceLocation ClassLoc, |
| IdentifierInfo *CatName, SourceLocation CatLoc) { |
| ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName); |
| ObjCCategoryImplDecl *CDecl = |
| ObjCCategoryImplDecl::Create(Context, CurContext, AtCatImplLoc, CatName, |
| IDecl); |
| /// Check that class of this category is already completely declared. |
| if (!IDecl || IDecl->isForwardDecl()) |
| Diag(ClassLoc, diag::err_undef_interface) << ClassName; |
| |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(CDecl); |
| |
| /// TODO: Check that CatName, category name, is not used in another |
| // implementation. |
| ObjCCategoryImpls.push_back(CDecl); |
| |
| CheckObjCDeclScope(CDecl); |
| return CDecl; |
| } |
| |
| Sema::DeclTy *Sema::ActOnStartClassImplementation( |
| SourceLocation AtClassImplLoc, |
| IdentifierInfo *ClassName, SourceLocation ClassLoc, |
| IdentifierInfo *SuperClassname, |
| SourceLocation SuperClassLoc) { |
| ObjCInterfaceDecl* IDecl = 0; |
| // Check for another declaration kind with the same name. |
| NamedDecl *PrevDecl = LookupName(TUScope, ClassName, LookupOrdinaryName); |
| if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { |
| Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName; |
| Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
| } else { |
| // Is there an interface declaration of this class; if not, warn! |
| IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); |
| if (!IDecl) |
| Diag(ClassLoc, diag::warn_undef_interface) << ClassName; |
| } |
| |
| // Check that super class name is valid class name |
| ObjCInterfaceDecl* SDecl = 0; |
| if (SuperClassname) { |
| // Check if a different kind of symbol declared in this scope. |
| PrevDecl = LookupName(TUScope, SuperClassname, LookupOrdinaryName); |
| if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { |
| Diag(SuperClassLoc, diag::err_redefinition_different_kind) |
| << SuperClassname; |
| Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
| } else { |
| SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); |
| if (!SDecl) |
| Diag(SuperClassLoc, diag::err_undef_superclass) |
| << SuperClassname << ClassName; |
| else if (IDecl && IDecl->getSuperClass() != SDecl) { |
| // This implementation and its interface do not have the same |
| // super class. |
| Diag(SuperClassLoc, diag::err_conflicting_super_class) |
| << SDecl->getDeclName(); |
| Diag(SDecl->getLocation(), diag::note_previous_definition); |
| } |
| } |
| } |
| |
| if (!IDecl) { |
| // Legacy case of @implementation with no corresponding @interface. |
| // Build, chain & install the interface decl into the identifier. |
| |
| // FIXME: Do we support attributes on the @implementation? If so |
| // we should copy them over. |
| IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtClassImplLoc, |
| ClassName, ClassLoc, false, true); |
| ObjCInterfaceDecls[ClassName] = IDecl; |
| IDecl->setSuperClass(SDecl); |
| IDecl->setLocEnd(ClassLoc); |
| |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(IDecl); |
| // Remember that this needs to be removed when the scope is popped. |
| TUScope->AddDecl(IDecl); |
| } |
| |
| ObjCImplementationDecl* IMPDecl = |
| ObjCImplementationDecl::Create(Context, CurContext, AtClassImplLoc, |
| IDecl, SDecl); |
| |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(IMPDecl); |
| |
| if (CheckObjCDeclScope(IMPDecl)) |
| return IMPDecl; |
| |
| // Check that there is no duplicate implementation of this class. |
| if (ObjCImplementations[ClassName]) |
| // FIXME: Don't leak everything! |
| Diag(ClassLoc, diag::err_dup_implementation_class) << ClassName; |
| else // add it to the list. |
| ObjCImplementations[ClassName] = IMPDecl; |
| return IMPDecl; |
| } |
| |
| void Sema::CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, |
| ObjCIvarDecl **ivars, unsigned numIvars, |
| SourceLocation RBrace) { |
| assert(ImpDecl && "missing implementation decl"); |
| ObjCInterfaceDecl* IDecl = ImpDecl->getClassInterface(); |
| if (!IDecl) |
| return; |
| /// Check case of non-existing @interface decl. |
| /// (legacy objective-c @implementation decl without an @interface decl). |
| /// Add implementations's ivar to the synthesize class's ivar list. |
| if (IDecl->ImplicitInterfaceDecl()) { |
| IDecl->setIVarList(ivars, numIvars, Context); |
| IDecl->setLocEnd(RBrace); |
| return; |
| } |
| // If implementation has empty ivar list, just return. |
| if (numIvars == 0) |
| return; |
| |
| assert(ivars && "missing @implementation ivars"); |
| |
| // Check interface's Ivar list against those in the implementation. |
| // names and types must match. |
| // |
| unsigned j = 0; |
| ObjCInterfaceDecl::ivar_iterator |
| IVI = IDecl->ivar_begin(), IVE = IDecl->ivar_end(); |
| for (; numIvars > 0 && IVI != IVE; ++IVI) { |
| ObjCIvarDecl* ImplIvar = ivars[j++]; |
| ObjCIvarDecl* ClsIvar = *IVI; |
| assert (ImplIvar && "missing implementation ivar"); |
| assert (ClsIvar && "missing class ivar"); |
| |
| // First, make sure the types match. |
| if (Context.getCanonicalType(ImplIvar->getType()) != |
| Context.getCanonicalType(ClsIvar->getType())) { |
| Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_type) |
| << ImplIvar->getIdentifier() |
| << ImplIvar->getType() << ClsIvar->getType(); |
| Diag(ClsIvar->getLocation(), diag::note_previous_definition); |
| } else if (ImplIvar->isBitField() && ClsIvar->isBitField()) { |
| Expr *ImplBitWidth = ImplIvar->getBitWidth(); |
| Expr *ClsBitWidth = ClsIvar->getBitWidth(); |
| if (ImplBitWidth->getIntegerConstantExprValue(Context).getZExtValue() != |
| ClsBitWidth->getIntegerConstantExprValue(Context).getZExtValue()) { |
| Diag(ImplBitWidth->getLocStart(), diag::err_conflicting_ivar_bitwidth) |
| << ImplIvar->getIdentifier(); |
| Diag(ClsBitWidth->getLocStart(), diag::note_previous_definition); |
| } |
| } |
| // Make sure the names are identical. |
| if (ImplIvar->getIdentifier() != ClsIvar->getIdentifier()) { |
| Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_name) |
| << ImplIvar->getIdentifier() << ClsIvar->getIdentifier(); |
| Diag(ClsIvar->getLocation(), diag::note_previous_definition); |
| } |
| --numIvars; |
| } |
| |
| if (numIvars > 0) |
| Diag(ivars[j]->getLocation(), diag::err_inconsistant_ivar_count); |
| else if (IVI != IVE) |
| Diag((*IVI)->getLocation(), diag::err_inconsistant_ivar_count); |
| } |
| |
| void Sema::WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, |
| bool &IncompleteImpl) { |
| if (!IncompleteImpl) { |
| Diag(ImpLoc, diag::warn_incomplete_impl); |
| IncompleteImpl = true; |
| } |
| Diag(ImpLoc, diag::warn_undef_method_impl) << method->getDeclName(); |
| } |
| |
| void Sema::WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethodDecl, |
| ObjCMethodDecl *IntfMethodDecl) { |
| bool err = false; |
| QualType ImpMethodQType = |
| Context.getCanonicalType(ImpMethodDecl->getResultType()); |
| QualType IntfMethodQType = |
| Context.getCanonicalType(IntfMethodDecl->getResultType()); |
| if (!Context.typesAreCompatible(IntfMethodQType, ImpMethodQType)) |
| err = true; |
| else for (ObjCMethodDecl::param_iterator IM=ImpMethodDecl->param_begin(), |
| IF=IntfMethodDecl->param_begin(), |
| EM=ImpMethodDecl->param_end(); IM!=EM; ++IM, IF++) { |
| ImpMethodQType = Context.getCanonicalType((*IM)->getType()); |
| IntfMethodQType = Context.getCanonicalType((*IF)->getType()); |
| if (!Context.typesAreCompatible(IntfMethodQType, ImpMethodQType)) { |
| err = true; |
| break; |
| } |
| } |
| if (err) { |
| Diag(ImpMethodDecl->getLocation(), diag::warn_conflicting_types) |
| << ImpMethodDecl->getDeclName(); |
| Diag(IntfMethodDecl->getLocation(), diag::note_previous_definition); |
| } |
| } |
| |
| /// isPropertyReadonly - Return true if property is readonly, by searching |
| /// for the property in the class and in its categories and implementations |
| /// |
| bool Sema::isPropertyReadonly(ObjCPropertyDecl *PDecl, |
| ObjCInterfaceDecl *IDecl) { |
| // by far the most common case. |
| if (!PDecl->isReadOnly()) |
| return false; |
| // Even if property is ready only, if interface has a user defined setter, |
| // it is not considered read only. |
| if (IDecl->getInstanceMethod(PDecl->getSetterName())) |
| return false; |
| |
| // Main class has the property as 'readonly'. Must search |
| // through the category list to see if the property's |
| // attribute has been over-ridden to 'readwrite'. |
| for (ObjCCategoryDecl *Category = IDecl->getCategoryList(); |
| Category; Category = Category->getNextClassCategory()) { |
| // Even if property is ready only, if a category has a user defined setter, |
| // it is not considered read only. |
| if (Category->getInstanceMethod(PDecl->getSetterName())) |
| return false; |
| ObjCPropertyDecl *P = |
| Category->FindPropertyDeclaration(PDecl->getIdentifier()); |
| if (P && !P->isReadOnly()) |
| return false; |
| } |
| |
| // Also, check for definition of a setter method in the implementation if |
| // all else failed. |
| if (ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(CurContext)) { |
| if (ObjCImplementationDecl *IMD = |
| dyn_cast<ObjCImplementationDecl>(OMD->getDeclContext())) { |
| if (IMD->getInstanceMethod(PDecl->getSetterName())) |
| return false; |
| } |
| else if (ObjCCategoryImplDecl *CIMD = |
| dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) { |
| if (CIMD->getInstanceMethod(PDecl->getSetterName())) |
| return false; |
| } |
| } |
| // Lastly, look through the implementation (if one is in scope). |
| if (ObjCImplementationDecl *ImpDecl = |
| ObjCImplementations[IDecl->getIdentifier()]) |
| if (ImpDecl->getInstanceMethod(PDecl->getSetterName())) |
| return false; |
| return true; |
| } |
| |
| /// FIXME: Type hierarchies in Objective-C can be deep. We could most |
| /// likely improve the efficiency of selector lookups and type |
| /// checking by associating with each protocol / interface / category |
| /// the flattened instance tables. If we used an immutable set to keep |
| /// the table then it wouldn't add significant memory cost and it |
| /// would be handy for lookups. |
| |
| /// CheckProtocolMethodDefs - This routine checks unimplemented methods |
| /// Declared in protocol, and those referenced by it. |
| void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc, |
| ObjCProtocolDecl *PDecl, |
| bool& IncompleteImpl, |
| const llvm::DenseSet<Selector> &InsMap, |
| const llvm::DenseSet<Selector> &ClsMap, |
| ObjCInterfaceDecl *IDecl) { |
| ObjCInterfaceDecl *Super = IDecl->getSuperClass(); |
| |
| // If a method lookup fails locally we still need to look and see if |
| // the method was implemented by a base class or an inherited |
| // protocol. This lookup is slow, but occurs rarely in correct code |
| // and otherwise would terminate in a warning. |
| |
| // check unimplemented instance methods. |
| for (ObjCProtocolDecl::instmeth_iterator I = PDecl->instmeth_begin(), |
| E = PDecl->instmeth_end(); I != E; ++I) { |
| ObjCMethodDecl *method = *I; |
| if (method->getImplementationControl() != ObjCMethodDecl::Optional && |
| !method->isSynthesized() && !InsMap.count(method->getSelector()) && |
| (!Super || !Super->lookupInstanceMethod(method->getSelector()))) |
| WarnUndefinedMethod(ImpLoc, method, IncompleteImpl); |
| } |
| // check unimplemented class methods |
| for (ObjCProtocolDecl::classmeth_iterator I = PDecl->classmeth_begin(), |
| E = PDecl->classmeth_end(); I != E; ++I) { |
| ObjCMethodDecl *method = *I; |
| if (method->getImplementationControl() != ObjCMethodDecl::Optional && |
| !ClsMap.count(method->getSelector()) && |
| (!Super || !Super->lookupClassMethod(method->getSelector()))) |
| WarnUndefinedMethod(ImpLoc, method, IncompleteImpl); |
| } |
| // Check on this protocols's referenced protocols, recursively. |
| for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(), |
| E = PDecl->protocol_end(); PI != E; ++PI) |
| CheckProtocolMethodDefs(ImpLoc, *PI, IncompleteImpl, InsMap, ClsMap, IDecl); |
| } |
| |
| void Sema::ImplMethodsVsClassMethods(ObjCImplDecl* IMPDecl, |
| ObjCContainerDecl* CDecl, |
| bool IncompleteImpl) { |
| llvm::DenseSet<Selector> InsMap; |
| // Check and see if instance methods in class interface have been |
| // implemented in the implementation class. |
| for (ObjCImplementationDecl::instmeth_iterator I = IMPDecl->instmeth_begin(), |
| E = IMPDecl->instmeth_end(); I != E; ++I) |
| InsMap.insert((*I)->getSelector()); |
| |
| for (ObjCInterfaceDecl::instmeth_iterator I = CDecl->instmeth_begin(), |
| E = CDecl->instmeth_end(); I != E; ++I) { |
| if (!(*I)->isSynthesized() && !InsMap.count((*I)->getSelector())) { |
| WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl); |
| continue; |
| } |
| |
| ObjCMethodDecl *ImpMethodDecl = |
| IMPDecl->getInstanceMethod((*I)->getSelector()); |
| ObjCMethodDecl *IntfMethodDecl = |
| CDecl->getInstanceMethod((*I)->getSelector()); |
| assert(IntfMethodDecl && |
| "IntfMethodDecl is null in ImplMethodsVsClassMethods"); |
| // ImpMethodDecl may be null as in a @dynamic property. |
| if (ImpMethodDecl) |
| WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl); |
| } |
| |
| llvm::DenseSet<Selector> ClsMap; |
| // Check and see if class methods in class interface have been |
| // implemented in the implementation class. |
| for (ObjCImplementationDecl::classmeth_iterator I =IMPDecl->classmeth_begin(), |
| E = IMPDecl->classmeth_end(); I != E; ++I) |
| ClsMap.insert((*I)->getSelector()); |
| |
| for (ObjCInterfaceDecl::classmeth_iterator I = CDecl->classmeth_begin(), |
| E = CDecl->classmeth_end(); I != E; ++I) |
| if (!ClsMap.count((*I)->getSelector())) |
| WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl); |
| else { |
| ObjCMethodDecl *ImpMethodDecl = |
| IMPDecl->getClassMethod((*I)->getSelector()); |
| ObjCMethodDecl *IntfMethodDecl = |
| CDecl->getClassMethod((*I)->getSelector()); |
| WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl); |
| } |
| |
| |
| // Check the protocol list for unimplemented methods in the @implementation |
| // class. |
| if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl> (CDecl)) { |
| for (ObjCCategoryDecl::protocol_iterator PI = I->protocol_begin(), |
| E = I->protocol_end(); PI != E; ++PI) |
| CheckProtocolMethodDefs(IMPDecl->getLocation(), *PI, IncompleteImpl, |
| InsMap, ClsMap, I); |
| // Check class extensions (unnamed categories) |
| for (ObjCCategoryDecl *Categories = I->getCategoryList(); |
| Categories; Categories = Categories->getNextClassCategory()) { |
| if (!Categories->getIdentifier()) { |
| ImplMethodsVsClassMethods(IMPDecl, Categories, IncompleteImpl); |
| break; |
| } |
| } |
| } else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) { |
| for (ObjCCategoryDecl::protocol_iterator PI = C->protocol_begin(), |
| E = C->protocol_end(); PI != E; ++PI) |
| CheckProtocolMethodDefs(IMPDecl->getLocation(), *PI, IncompleteImpl, |
| InsMap, ClsMap, C->getClassInterface()); |
| } else |
| assert(false && "invalid ObjCContainerDecl type."); |
| } |
| |
| /// ActOnForwardClassDeclaration - |
| Action::DeclTy * |
| Sema::ActOnForwardClassDeclaration(SourceLocation AtClassLoc, |
| IdentifierInfo **IdentList, |
| unsigned NumElts) { |
| llvm::SmallVector<ObjCInterfaceDecl*, 32> Interfaces; |
| |
| for (unsigned i = 0; i != NumElts; ++i) { |
| // Check for another declaration kind with the same name. |
| NamedDecl *PrevDecl = LookupName(TUScope, IdentList[i], LookupOrdinaryName); |
| if (PrevDecl && PrevDecl->isTemplateParameter()) { |
| // Maybe we will complain about the shadowed template parameter. |
| DiagnoseTemplateParameterShadow(AtClassLoc, PrevDecl); |
| // Just pretend that we didn't see the previous declaration. |
| PrevDecl = 0; |
| } |
| |
| if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { |
| // GCC apparently allows the following idiom: |
| // |
| // typedef NSObject < XCElementTogglerP > XCElementToggler; |
| // @class XCElementToggler; |
| // |
| // FIXME: Make an extension? |
| TypedefDecl *TDD = dyn_cast<TypedefDecl>(PrevDecl); |
| if (!TDD || !isa<ObjCInterfaceType>(TDD->getUnderlyingType())) { |
| Diag(AtClassLoc, diag::err_redefinition_different_kind) << IdentList[i]; |
| Diag(PrevDecl->getLocation(), diag::note_previous_definition); |
| } |
| } |
| ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); |
| if (!IDecl) { // Not already seen? Make a forward decl. |
| IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtClassLoc, |
| IdentList[i], SourceLocation(), true); |
| ObjCInterfaceDecls[IdentList[i]] = IDecl; |
| |
| // FIXME: PushOnScopeChains? |
| CurContext->addDecl(IDecl); |
| // Remember that this needs to be removed when the scope is popped. |
| TUScope->AddDecl(IDecl); |
| } |
| |
| Interfaces.push_back(IDecl); |
| } |
| |
| ObjCClassDecl *CDecl = ObjCClassDecl::Create(Context, CurContext, AtClassLoc, |
| &Interfaces[0], |
| Interfaces.size()); |
| CurContext->addDecl(CDecl); |
| CheckObjCDeclScope(CDecl); |
| return CDecl; |
| } |
| |
| |
| /// MatchTwoMethodDeclarations - Checks that two methods have matching type and |
| /// returns true, or false, accordingly. |
| /// TODO: Handle protocol list; such as id<p1,p2> in type comparisons |
| bool Sema::MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, |
| const ObjCMethodDecl *PrevMethod, |
| bool matchBasedOnSizeAndAlignment) { |
| QualType T1 = Context.getCanonicalType(Method->getResultType()); |
| QualType T2 = Context.getCanonicalType(PrevMethod->getResultType()); |
| |
| if (T1 != T2) { |
| // The result types are different. |
| if (!matchBasedOnSizeAndAlignment) |
| return false; |
| // Incomplete types don't have a size and alignment. |
| if (T1->isIncompleteType() || T2->isIncompleteType()) |
| return false; |
| // Check is based on size and alignment. |
| if (Context.getTypeInfo(T1) != Context.getTypeInfo(T2)) |
| return false; |
| } |
| |
| ObjCMethodDecl::param_iterator ParamI = Method->param_begin(), |
| E = Method->param_end(); |
| ObjCMethodDecl::param_iterator PrevI = PrevMethod->param_begin(); |
| |
| for (; ParamI != E; ++ParamI, ++PrevI) { |
| assert(PrevI != PrevMethod->param_end() && "Param mismatch"); |
| T1 = Context.getCanonicalType((*ParamI)->getType()); |
| T2 = Context.getCanonicalType((*PrevI)->getType()); |
| if (T1 != T2) { |
| // The result types are different. |
| if (!matchBasedOnSizeAndAlignment) |
| return false; |
| // Incomplete types don't have a size and alignment. |
| if (T1->isIncompleteType() || T2->isIncompleteType()) |
| return false; |
| // Check is based on size and alignment. |
| if (Context.getTypeInfo(T1) != Context.getTypeInfo(T2)) |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void Sema::AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method) { |
| ObjCMethodList &Entry = InstanceMethodPool[Method->getSelector()]; |
| if (Entry.Method == 0) { |
| // Haven't seen a method with this selector name yet - add it. |
| Entry.Method = Method; |
| Entry.Next = 0; |
| return; |
| } |
| |
| // We've seen a method with this name, see if we have already seen this type |
| // signature. |
| for (ObjCMethodList *List = &Entry; List; List = List->Next) |
| if (MatchTwoMethodDeclarations(Method, List->Method)) |
| return; |
| |
| // We have a new signature for an existing method - add it. |
| // This is extremely rare. Only 1% of Cocoa selectors are "overloaded". |
| Entry.Next = new ObjCMethodList(Method, Entry.Next); |
| } |
| |
| // FIXME: Finish implementing -Wno-strict-selector-match. |
| ObjCMethodDecl *Sema::LookupInstanceMethodInGlobalPool(Selector Sel, |
| SourceRange R) { |
| ObjCMethodList &MethList = InstanceMethodPool[Sel]; |
| bool issueWarning = false; |
| |
| if (MethList.Method && MethList.Next) { |
| for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next) |
| // This checks if the methods differ by size & alignment. |
| if (!MatchTwoMethodDeclarations(MethList.Method, Next->Method, true)) |
| issueWarning = true; |
| } |
| if (issueWarning && (MethList.Method && MethList.Next)) { |
| Diag(R.getBegin(), diag::warn_multiple_method_decl) << Sel << R; |
| Diag(MethList.Method->getLocStart(), diag::note_using_decl) |
| << MethList.Method->getSourceRange(); |
| for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next) |
| Diag(Next->Method->getLocStart(), diag::note_also_found_decl) |
| << Next->Method->getSourceRange(); |
| } |
| return MethList.Method; |
| } |
| |
| void Sema::AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method) { |
| ObjCMethodList &FirstMethod = FactoryMethodPool[Method->getSelector()]; |
| if (!FirstMethod.Method) { |
| // Haven't seen a method with this selector name yet - add it. |
| FirstMethod.Method = Method; |
| FirstMethod.Next = 0; |
| } else { |
| // We've seen a method with this name, now check the type signature(s). |
| bool match = MatchTwoMethodDeclarations(Method, FirstMethod.Method); |
| |
| for (ObjCMethodList *Next = FirstMethod.Next; !match && Next; |
| Next = Next->Next) |
| match = MatchTwoMethodDeclarations(Method, Next->Method); |
| |
| if (!match) { |
| // We have a new signature for an existing method - add it. |
| // This is extremely rare. Only 1% of Cocoa selectors are "overloaded". |
| struct ObjCMethodList *OMI = new ObjCMethodList(Method, FirstMethod.Next); |
| FirstMethod.Next = OMI; |
| } |
| } |
| } |
| |
| /// ProcessPropertyDecl - Make sure that any user-defined setter/getter methods |
| /// have the property type and issue diagnostics if they don't. |
| /// Also synthesize a getter/setter method if none exist (and update the |
| /// appropriate lookup tables. FIXME: Should reconsider if adding synthesized |
| /// methods is the "right" thing to do. |
| void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property, |
| ObjCContainerDecl *CD) { |
| ObjCMethodDecl *GetterMethod, *SetterMethod; |
| |
| GetterMethod = CD->getInstanceMethod(property->getGetterName()); |
| SetterMethod = CD->getInstanceMethod(property->getSetterName()); |
| |
| if (GetterMethod && |
| GetterMethod->getResultType() != property->getType()) { |
| Diag(property->getLocation(), |
| diag::err_accessor_property_type_mismatch) |
| << property->getDeclName() |
| << GetterMethod->getSelector().getAsIdentifierInfo(); |
| Diag(GetterMethod->getLocation(), diag::note_declared_at); |
| } |
| |
| if (SetterMethod) { |
| if (Context.getCanonicalType(SetterMethod->getResultType()) |
| != Context.VoidTy) |
| Diag(SetterMethod->getLocation(), diag::err_setter_type_void); |
| if (SetterMethod->param_size() != 1 || |
| ((*SetterMethod->param_begin())->getType() != property->getType())) { |
| Diag(property->getLocation(), |
| diag::err_accessor_property_type_mismatch) |
| << property->getDeclName() |
| << SetterMethod->getSelector().getAsIdentifierInfo(); |
| Diag(SetterMethod->getLocation(), diag::note_declared_at); |
| } |
| } |
| |
| // Synthesize getter/setter methods if none exist. |
| // Find the default getter and if one not found, add one. |
| // FIXME: The synthesized property we set here is misleading. We |
| // almost always synthesize these methods unless the user explicitly |
| // provided prototypes (which is odd, but allowed). Sema should be |
| // typechecking that the declarations jive in that situation (which |
| // it is not currently). |
| if (!GetterMethod) { |
| // No instance method of same name as property getter name was found. |
| // Declare a getter method and add it to the list of methods |
| // for this class. |
| GetterMethod = ObjCMethodDecl::Create(Context, property->getLocation(), |
| property->getLocation(), property->getGetterName(), |
| property->getType(), CD, true, false, true, |
| (property->getPropertyImplementation() == |
| ObjCPropertyDecl::Optional) ? |
| ObjCMethodDecl::Optional : |
| ObjCMethodDecl::Required); |
| CD->addDecl(GetterMethod); |
| } else |
| // A user declared getter will be synthesize when @synthesize of |
| // the property with the same name is seen in the @implementation |
| GetterMethod->setIsSynthesized(); |
| property->setGetterMethodDecl(GetterMethod); |
| |
| // Skip setter if property is read-only. |
| if (!property->isReadOnly()) { |
| // Find the default setter and if one not found, add one. |
| if (!SetterMethod) { |
| // No instance method of same name as property setter name was found. |
| // Declare a setter method and add it to the list of methods |
| // for this class. |
| SetterMethod = ObjCMethodDecl::Create(Context, property->getLocation(), |
| property->getLocation(), |
| property->getSetterName(), |
| Context.VoidTy, CD, true, false, true, |
| (property->getPropertyImplementation() == |
| ObjCPropertyDecl::Optional) ? |
| ObjCMethodDecl::Optional : |
| ObjCMethodDecl::Required); |
| // Invent the arguments for the setter. We don't bother making a |
| // nice name for the argument. |
| ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterMethod, |
| SourceLocation(), |
| property->getIdentifier(), |
| property->getType(), |
| VarDecl::None, |
| 0); |
| SetterMethod->setMethodParams(&Argument, 1, Context); |
| CD->addDecl(SetterMethod); |
| } else |
| // A user declared setter will be synthesize when @synthesize of |
| // the property with the same name is seen in the @implementation |
| SetterMethod->setIsSynthesized(); |
| property->setSetterMethodDecl(SetterMethod); |
| } |
| // Add any synthesized methods to the global pool. This allows us to |
| // handle the following, which is supported by GCC (and part of the design). |
| // |
| // @interface Foo |
| // @property double bar; |
| // @end |
| // |
| // void thisIsUnfortunate() { |
| // id foo; |
| // double bar = [foo bar]; |
| // } |
| // |
| if (GetterMethod) |
| AddInstanceMethodToGlobalPool(GetterMethod); |
| if (SetterMethod) |
| AddInstanceMethodToGlobalPool(SetterMethod); |
| } |
| |
| // Note: For class/category implemenations, allMethods/allProperties is |
| // always null. |
| void Sema::ActOnAtEnd(SourceLocation AtEndLoc, DeclTy *classDecl, |
| DeclTy **allMethods, unsigned allNum, |
| DeclTy **allProperties, unsigned pNum) { |
| Decl *ClassDecl = static_cast<Decl *>(classDecl); |
| |
| // FIXME: If we don't have a ClassDecl, we have an error. We should consider |
| // always passing in a decl. If the decl has an error, isInvalidDecl() |
| // should be true. |
| if (!ClassDecl) |
| return; |
| |
| bool isInterfaceDeclKind = |
| isa<ObjCInterfaceDecl>(ClassDecl) || isa<ObjCCategoryDecl>(ClassDecl) |
| || isa<ObjCProtocolDecl>(ClassDecl); |
| bool checkIdenticalMethods = isa<ObjCImplementationDecl>(ClassDecl); |
| |
| DeclContext *DC = dyn_cast<DeclContext>(ClassDecl); |
| |
| // FIXME: Remove these and use the ObjCContainerDecl/DeclContext. |
| llvm::DenseMap<Selector, const ObjCMethodDecl*> InsMap; |
| llvm::DenseMap<Selector, const ObjCMethodDecl*> ClsMap; |
| |
| for (unsigned i = 0; i < allNum; i++ ) { |
| ObjCMethodDecl *Method = |
| cast_or_null<ObjCMethodDecl>(static_cast<Decl*>(allMethods[i])); |
| |
| if (!Method) continue; // Already issued a diagnostic. |
| if (Method->isInstanceMethod()) { |
| /// Check for instance method of the same name with incompatible types |
| const ObjCMethodDecl *&PrevMethod = InsMap[Method->getSelector()]; |
| bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod) |
| : false; |
| if ((isInterfaceDeclKind && PrevMethod && !match) |
| || (checkIdenticalMethods && match)) { |
| Diag(Method->getLocation(), diag::err_duplicate_method_decl) |
| << Method->getDeclName(); |
| Diag(PrevMethod->getLocation(), diag::note_previous_declaration); |
| } else { |
| DC->addDecl(Method); |
| InsMap[Method->getSelector()] = Method; |
| /// The following allows us to typecheck messages to "id". |
| AddInstanceMethodToGlobalPool(Method); |
| } |
| } |
| else { |
| /// Check for class method of the same name with incompatible types |
| const ObjCMethodDecl *&PrevMethod = ClsMap[Method->getSelector()]; |
| bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod) |
| : false; |
| if ((isInterfaceDeclKind && PrevMethod && !match) |
| || (checkIdenticalMethods && match)) { |
| Diag(Method->getLocation(), diag::err_duplicate_method_decl) |
| << Method->getDeclName(); |
| Diag(PrevMethod->getLocation(), diag::note_previous_declaration); |
| } else { |
| DC->addDecl(Method); |
| ClsMap[Method->getSelector()] = Method; |
| /// The following allows us to typecheck messages to "Class". |
| AddFactoryMethodToGlobalPool(Method); |
| } |
| } |
| } |
| if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) { |
| // Compares properties declared in this class to those of its |
| // super class. |
| ComparePropertiesInBaseAndSuper(I); |
| MergeProtocolPropertiesIntoClass(I, I); |
| } else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(ClassDecl)) { |
| // Categories are used to extend the class by declaring new methods. |
| // By the same token, they are also used to add new properties. No |
| // need to compare the added property to those in the class. |
| |
| // Merge protocol properties into category |
| MergeProtocolPropertiesIntoClass(C, C); |
| if (C->getIdentifier() == 0) |
| DiagnoseClassExtensionDupMethods(C, C->getClassInterface()); |
| } |
| if (ObjCContainerDecl *CDecl = dyn_cast<ObjCContainerDecl>(ClassDecl)) { |
| // ProcessPropertyDecl is responsible for diagnosing conflicts with any |
| // user-defined setter/getter. It also synthesizes setter/getter methods |
| // and adds them to the DeclContext and global method pools. |
| for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(), |
| E = CDecl->prop_end(); I != E; ++I) |
| ProcessPropertyDecl(*I, CDecl); |
| CDecl->setAtEndLoc(AtEndLoc); |
| } |
| if (ObjCImplementationDecl *IC=dyn_cast<ObjCImplementationDecl>(ClassDecl)) { |
| IC->setLocEnd(AtEndLoc); |
| if (ObjCInterfaceDecl* IDecl = IC->getClassInterface()) |
| ImplMethodsVsClassMethods(IC, IDecl); |
| } else if (ObjCCategoryImplDecl* CatImplClass = |
| dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) { |
| CatImplClass->setLocEnd(AtEndLoc); |
| |
| // Find category interface decl and then check that all methods declared |
| // in this interface are implemented in the category @implementation. |
| if (ObjCInterfaceDecl* IDecl = CatImplClass->getClassInterface()) { |
| for (ObjCCategoryDecl *Categories = IDecl->getCategoryList(); |
| Categories; Categories = Categories->getNextClassCategory()) { |
| if (Categories->getIdentifier() == CatImplClass->getIdentifier()) { |
| ImplMethodsVsClassMethods(CatImplClass, Categories); |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| |
| /// CvtQTToAstBitMask - utility routine to produce an AST bitmask for |
| /// objective-c's type qualifier from the parser version of the same info. |
| static Decl::ObjCDeclQualifier |
| CvtQTToAstBitMask(ObjCDeclSpec::ObjCDeclQualifier PQTVal) { |
| Decl::ObjCDeclQualifier ret = Decl::OBJC_TQ_None; |
| if (PQTVal & ObjCDeclSpec::DQ_In) |
| ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_In); |
| if (PQTVal & ObjCDeclSpec::DQ_Inout) |
| ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Inout); |
| if (PQTVal & ObjCDeclSpec::DQ_Out) |
| ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Out); |
| if (PQTVal & ObjCDeclSpec::DQ_Bycopy) |
| ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Bycopy); |
| if (PQTVal & ObjCDeclSpec::DQ_Byref) |
| ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Byref); |
| if (PQTVal & ObjCDeclSpec::DQ_Oneway) |
| ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Oneway); |
| |
| return ret; |
| } |
| |
| Sema::DeclTy *Sema::ActOnMethodDeclaration( |
| SourceLocation MethodLoc, SourceLocation EndLoc, |
| tok::TokenKind MethodType, DeclTy *classDecl, |
| ObjCDeclSpec &ReturnQT, TypeTy *ReturnType, |
| Selector Sel, |
| // optional arguments. The number of types/arguments is obtained |
| // from the Sel.getNumArgs(). |
| ObjCDeclSpec *ArgQT, TypeTy **ArgTypes, IdentifierInfo **ArgNames, |
| llvm::SmallVectorImpl<Declarator> &Cdecls, |
| AttributeList *AttrList, tok::ObjCKeywordKind MethodDeclKind, |
| bool isVariadic) { |
| Decl *ClassDecl = static_cast<Decl*>(classDecl); |
| |
| // Make sure we can establish a context for the method. |
| if (!ClassDecl) { |
| Diag(MethodLoc, diag::error_missing_method_context); |
| return 0; |
| } |
| QualType resultDeclType; |
| |
| if (ReturnType) { |
| resultDeclType = QualType::getFromOpaquePtr(ReturnType); |
| |
| // Methods cannot return interface types. All ObjC objects are |
| // passed by reference. |
| if (resultDeclType->isObjCInterfaceType()) { |
| Diag(MethodLoc, diag::err_object_cannot_be_by_value) |
| << "returned"; |
| return 0; |
| } |
| } else // get the type for "id". |
| resultDeclType = Context.getObjCIdType(); |
| |
| ObjCMethodDecl* ObjCMethod = |
| ObjCMethodDecl::Create(Context, MethodLoc, EndLoc, Sel, resultDeclType, |
| dyn_cast<DeclContext>(ClassDecl), |
| MethodType == tok::minus, isVariadic, |
| false, |
| MethodDeclKind == tok::objc_optional ? |
| ObjCMethodDecl::Optional : |
| ObjCMethodDecl::Required); |
| |
| llvm::SmallVector<ParmVarDecl*, 16> Params; |
| |
| for (unsigned i = 0; i < Sel.getNumArgs(); i++) { |
| // FIXME: arg->AttrList must be stored too! |
| QualType argType, originalArgType; |
| |
| if (ArgTypes[i]) { |
| argType = QualType::getFromOpaquePtr(ArgTypes[i]); |
| // Perform the default array/function conversions (C99 6.7.5.3p[7,8]). |
| if (argType->isArrayType()) { // (char *[]) -> (char **) |
| originalArgType = argType; |
| argType = Context.getArrayDecayedType(argType); |
| } |
| else if (argType->isFunctionType()) |
| argType = Context.getPointerType(argType); |
| else if (argType->isObjCInterfaceType()) { |
| // FIXME! provide more precise location for the parameter |
| Diag(MethodLoc, diag::err_object_cannot_be_by_value) |
| << "passed"; |
| ObjCMethod->setInvalidDecl(); |
| return 0; |
| } |
| } else |
| argType = Context.getObjCIdType(); |
| ParmVarDecl* Param; |
| if (originalArgType.isNull()) |
| Param = ParmVarDecl::Create(Context, ObjCMethod, |
| SourceLocation(/*FIXME*/), |
| ArgNames[i], argType, |
| VarDecl::None, 0); |
| else |
| Param = OriginalParmVarDecl::Create(Context, ObjCMethod, |
| SourceLocation(/*FIXME*/), |
| ArgNames[i], argType, originalArgType, |
| VarDecl::None, 0); |
| |
| Param->setObjCDeclQualifier( |
| CvtQTToAstBitMask(ArgQT[i].getObjCDeclQualifier())); |
| Params.push_back(Param); |
| } |
| |
| ObjCMethod->setMethodParams(&Params[0], Sel.getNumArgs(), Context); |
| ObjCMethod->setObjCDeclQualifier( |
| CvtQTToAstBitMask(ReturnQT.getObjCDeclQualifier())); |
| const ObjCMethodDecl *PrevMethod = 0; |
| |
| if (AttrList) |
| ProcessDeclAttributeList(ObjCMethod, AttrList); |
| |
| // For implementations (which can be very "coarse grain"), we add the |
| // method now. This allows the AST to implement lookup methods that work |
| // incrementally (without waiting until we parse the @end). It also allows |
| // us to flag multiple declaration errors as they occur. |
| if (ObjCImplementationDecl *ImpDecl = |
| dyn_cast<ObjCImplementationDecl>(ClassDecl)) { |
| if (MethodType == tok::minus) { |
| PrevMethod = ImpDecl->getInstanceMethod(Sel); |
| ImpDecl->addInstanceMethod(ObjCMethod); |
| } else { |
| PrevMethod = ImpDecl->getClassMethod(Sel); |
| ImpDecl->addClassMethod(ObjCMethod); |
| } |
| } |
| else if (ObjCCategoryImplDecl *CatImpDecl = |
| dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) { |
| if (MethodType == tok::minus) { |
| PrevMethod = CatImpDecl->getInstanceMethod(Sel); |
| CatImpDecl->addInstanceMethod(ObjCMethod); |
| } else { |
| PrevMethod = CatImpDecl->getClassMethod(Sel); |
| CatImpDecl->addClassMethod(ObjCMethod); |
| } |
| } |
| if (PrevMethod) { |
| // You can never have two method definitions with the same name. |
| Diag(ObjCMethod->getLocation(), diag::err_duplicate_method_decl) |
| << ObjCMethod->getDeclName(); |
| Diag(PrevMethod->getLocation(), diag::note_previous_declaration); |
| } |
| return ObjCMethod; |
| } |
| |
| void Sema::CheckObjCPropertyAttributes(QualType PropertyTy, |
| SourceLocation Loc, |
| unsigned &Attributes) { |
| // FIXME: Improve the reported location. |
| |
| // readonly and readwrite/assign/retain/copy conflict. |
| if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) && |
| (Attributes & (ObjCDeclSpec::DQ_PR_readwrite | |
| ObjCDeclSpec::DQ_PR_assign | |
| ObjCDeclSpec::DQ_PR_copy | |
| ObjCDeclSpec::DQ_PR_retain))) { |
| const char * which = (Attributes & ObjCDeclSpec::DQ_PR_readwrite) ? |
| "readwrite" : |
| (Attributes & ObjCDeclSpec::DQ_PR_assign) ? |
| "assign" : |
| (Attributes & ObjCDeclSpec::DQ_PR_copy) ? |
| "copy" : "retain"; |
| |
| Diag(Loc, (Attributes & (ObjCDeclSpec::DQ_PR_readwrite)) ? |
| diag::err_objc_property_attr_mutually_exclusive : |
| diag::warn_objc_property_attr_mutually_exclusive) |
| << "readonly" << which; |
| } |
| |
| // Check for copy or retain on non-object types. |
| if ((Attributes & (ObjCDeclSpec::DQ_PR_copy | ObjCDeclSpec::DQ_PR_retain)) && |
| !Context.isObjCObjectPointerType(PropertyTy)) { |
| Diag(Loc, diag::err_objc_property_requires_object) |
| << (Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain"); |
| Attributes &= ~(ObjCDeclSpec::DQ_PR_copy | ObjCDeclSpec::DQ_PR_retain); |
| } |
| |
| // Check for more than one of { assign, copy, retain }. |
| if (Attributes & ObjCDeclSpec::DQ_PR_assign) { |
| if (Attributes & ObjCDeclSpec::DQ_PR_copy) { |
| Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) |
| << "assign" << "copy"; |
| Attributes &= ~ObjCDeclSpec::DQ_PR_copy; |
| } |
| if (Attributes & ObjCDeclSpec::DQ_PR_retain) { |
| Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) |
| << "assign" << "retain"; |
| Attributes &= ~ObjCDeclSpec::DQ_PR_retain; |
| } |
| } else if (Attributes & ObjCDeclSpec::DQ_PR_copy) { |
| if (Attributes & ObjCDeclSpec::DQ_PR_retain) { |
| Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) |
| << "copy" << "retain"; |
| Attributes &= ~ObjCDeclSpec::DQ_PR_retain; |
| } |
| } |
| |
| // Warn if user supplied no assignment attribute, property is |
| // readwrite, and this is an object type. |
| if (!(Attributes & (ObjCDeclSpec::DQ_PR_assign | ObjCDeclSpec::DQ_PR_copy | |
| ObjCDeclSpec::DQ_PR_retain)) && |
| !(Attributes & ObjCDeclSpec::DQ_PR_readonly) && |
| Context.isObjCObjectPointerType(PropertyTy)) { |
| // Skip this warning in gc-only mode. |
| if (getLangOptions().getGCMode() != LangOptions::GCOnly) |
| Diag(Loc, diag::warn_objc_property_no_assignment_attribute); |
| |
| // If non-gc code warn that this is likely inappropriate. |
| if (getLangOptions().getGCMode() == LangOptions::NonGC) |
| Diag(Loc, diag::warn_objc_property_default_assign_on_object); |
| |
| // FIXME: Implement warning dependent on NSCopying being |
| // implemented. See also: |
| // <rdar://5168496&4855821&5607453&5096644&4947311&5698469&4947014&5168496> |
| // (please trim this list while you are at it). |
| } |
| } |
| |
| Sema::DeclTy *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc, |
| FieldDeclarator &FD, |
| ObjCDeclSpec &ODS, |
| Selector GetterSel, |
| Selector SetterSel, |
| DeclTy *ClassCategory, |
| bool *isOverridingProperty, |
| tok::ObjCKeywordKind MethodImplKind) { |
| unsigned Attributes = ODS.getPropertyAttributes(); |
| bool isReadWrite = ((Attributes & ObjCDeclSpec::DQ_PR_readwrite) || |
| // default is readwrite! |
| !(Attributes & ObjCDeclSpec::DQ_PR_readonly)); |
| // property is defaulted to 'assign' if it is readwrite and is |
| // not retain or copy |
| bool isAssign = ((Attributes & ObjCDeclSpec::DQ_PR_assign) || |
| (isReadWrite && |
| !(Attributes & ObjCDeclSpec::DQ_PR_retain) && |
| !(Attributes & ObjCDeclSpec::DQ_PR_copy))); |
| QualType T = GetTypeForDeclarator(FD.D, S); |
| Decl *ClassDecl = static_cast<Decl *>(ClassCategory); |
| |
| // May modify Attributes. |
| CheckObjCPropertyAttributes(T, AtLoc, Attributes); |
| |
| if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) |
| if (!CDecl->getIdentifier()) { |
| // This is an anonymous category. property requires special |
| // handling. |
| if (ObjCInterfaceDecl *ICDecl = CDecl->getClassInterface()) { |
| if (ObjCPropertyDecl *PIDecl = |
| ICDecl->FindPropertyDeclaration(FD.D.getIdentifier())) { |
| // property 'PIDecl's readonly attribute will be over-ridden |
| // with anonymous category's readwrite property attribute! |
| unsigned PIkind = PIDecl->getPropertyAttributes(); |
| if (isReadWrite && (PIkind & ObjCPropertyDecl::OBJC_PR_readonly)) { |
| if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) != |
| (PIkind & ObjCPropertyDecl::OBJC_PR_nonatomic)) |
| Diag(AtLoc, diag::warn_property_attr_mismatch); |
| PIDecl->makeitReadWriteAttribute(); |
| if (Attributes & ObjCDeclSpec::DQ_PR_retain) |
| PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain); |
| if (Attributes & ObjCDeclSpec::DQ_PR_copy) |
| PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy); |
| PIDecl->setSetterName(SetterSel); |
| // FIXME: use a common routine with addPropertyMethods. |
| ObjCMethodDecl *SetterDecl = |
| ObjCMethodDecl::Create(Context, AtLoc, AtLoc, SetterSel, |
| Context.VoidTy, |
| ICDecl, |
| true, false, true, |
| ObjCMethodDecl::Required); |
| ParmVarDecl *Argument = ParmVarDecl::Create(Context, SetterDecl, |
| SourceLocation(), |
| FD.D.getIdentifier(), |
| T, VarDecl::None, 0); |
| SetterDecl->setMethodParams(&Argument, 1, Context); |
| PIDecl->setSetterMethodDecl(SetterDecl); |
| } |
| else |
| Diag(AtLoc, diag::err_use_continuation_class) << ICDecl->getDeclName(); |
| *isOverridingProperty = true; |
| return 0; |
| } |
| // No matching property found in the main class. Just fall thru |
| // and add property to the anonymous category. It looks like |
| // it works as is. This category becomes just like a category |
| // for its primary class. |
| } else { |
| Diag(CDecl->getLocation(), diag::err_continuation_class); |
| *isOverridingProperty = true; |
| return 0; |
| } |
| } |
| |
| Type *t = T.getTypePtr(); |
| if (t->isArrayType() || t->isFunctionType()) |
| Diag(AtLoc, diag::err_property_type) << T; |
| |
| DeclContext *DC = dyn_cast<DeclContext>(ClassDecl); |
| assert(DC && "ClassDecl is not a DeclContext"); |
| ObjCPropertyDecl *PDecl = ObjCPropertyDecl::Create(Context, DC, AtLoc, |
| FD.D.getIdentifier(), T); |
| DC->addDecl(PDecl); |
| |
| ProcessDeclAttributes(PDecl, FD.D); |
| |
| // Regardless of setter/getter attribute, we save the default getter/setter |
| // selector names in anticipation of declaration of setter/getter methods. |
| PDecl->setGetterName(GetterSel); |
| PDecl->setSetterName(SetterSel); |
| |
| if (Attributes & ObjCDeclSpec::DQ_PR_readonly) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly); |
| |
| if (Attributes & ObjCDeclSpec::DQ_PR_getter) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_getter); |
| |
| if (Attributes & ObjCDeclSpec::DQ_PR_setter) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_setter); |
| |
| if (isReadWrite) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite); |
| |
| if (Attributes & ObjCDeclSpec::DQ_PR_retain) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain); |
| |
| if (Attributes & ObjCDeclSpec::DQ_PR_copy) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy); |
| |
| if (isAssign) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign); |
| |
| if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic) |
| PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic); |
| |
| if (MethodImplKind == tok::objc_required) |
| PDecl->setPropertyImplementation(ObjCPropertyDecl::Required); |
| else if (MethodImplKind == tok::objc_optional) |
| PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional); |
| |
| return PDecl; |
| } |
| |
| /// ActOnPropertyImplDecl - This routine performs semantic checks and |
| /// builds the AST node for a property implementation declaration; declared |
| /// as @synthesize or @dynamic. |
| /// |
| Sema::DeclTy *Sema::ActOnPropertyImplDecl(SourceLocation AtLoc, |
| SourceLocation PropertyLoc, |
| bool Synthesize, |
| DeclTy *ClassCatImpDecl, |
| IdentifierInfo *PropertyId, |
| IdentifierInfo *PropertyIvar) { |
| Decl *ClassImpDecl = static_cast<Decl*>(ClassCatImpDecl); |
| // Make sure we have a context for the property implementation declaration. |
| if (!ClassImpDecl) { |
| Diag(AtLoc, diag::error_missing_property_context); |
| return 0; |
| } |
| ObjCPropertyDecl *property = 0; |
| ObjCInterfaceDecl* IDecl = 0; |
| // Find the class or category class where this property must have |
| // a declaration. |
| ObjCImplementationDecl *IC = 0; |
| ObjCCategoryImplDecl* CatImplClass = 0; |
| if ((IC = dyn_cast<ObjCImplementationDecl>(ClassImpDecl))) { |
| IDecl = IC->getClassInterface(); |
| // We always synthesize an interface for an implementation |
| // without an interface decl. So, IDecl is always non-zero. |
| assert(IDecl && |
| "ActOnPropertyImplDecl - @implementation without @interface"); |
| |
| // Look for this property declaration in the @implementation's @interface |
| property = IDecl->FindPropertyDeclaration(PropertyId); |
| if (!property) { |
| Diag(PropertyLoc, diag::error_bad_property_decl) << IDecl->getDeclName(); |
| return 0; |
| } |
| } |
| else if ((CatImplClass = dyn_cast<ObjCCategoryImplDecl>(ClassImpDecl))) { |
| if (Synthesize) { |
| Diag(AtLoc, diag::error_synthesize_category_decl); |
| return 0; |
| } |
| IDecl = CatImplClass->getClassInterface(); |
| if (!IDecl) { |
| Diag(AtLoc, diag::error_missing_property_interface); |
| return 0; |
| } |
| ObjCCategoryDecl *Category = |
| IDecl->FindCategoryDeclaration(CatImplClass->getIdentifier()); |
| |
| // If category for this implementation not found, it is an error which |
| // has already been reported eralier. |
| if (!Category) |
| return 0; |
| // Look for this property declaration in @implementation's category |
| property = Category->FindPropertyDeclaration(PropertyId); |
| if (!property) { |
| Diag(PropertyLoc, diag::error_bad_category_property_decl) |
| << Category->getDeclName(); |
| return 0; |
| } |
| } |
| else { |
| Diag(AtLoc, diag::error_bad_property_context); |
| return 0; |
| } |
| ObjCIvarDecl *Ivar = 0; |
| // Check that we have a valid, previously declared ivar for @synthesize |
| if (Synthesize) { |
| // @synthesize |
| if (!PropertyIvar) |
| PropertyIvar = PropertyId; |
| // Check that this is a previously declared 'ivar' in 'IDecl' interface |
| Ivar = IDecl->lookupInstanceVariable(PropertyIvar); |
| if (!Ivar) { |
| if (getLangOptions().ObjCNonFragileABI) |
| Diag(PropertyLoc, diag::error_synthesized_ivar_yet_not_supported) |
| << PropertyId; |
| else |
| Diag(PropertyLoc, diag::error_missing_property_ivar_decl) << PropertyId; |
| return 0; |
| } |
| QualType PropType = Context.getCanonicalType(property->getType()); |
| QualType IvarType = Context.getCanonicalType(Ivar->getType()); |
| |
| // Check that type of property and its ivar are type compatible. |
| if (PropType != IvarType) { |
| if (CheckAssignmentConstraints(PropType, IvarType) != Compatible) { |
| Diag(PropertyLoc, diag::error_property_ivar_type) |
| << property->getDeclName() << Ivar->getDeclName(); |
| return 0; |
| } |
| else { |
| // FIXME! Rules for properties are somewhat different that those |
| // for assignments. Use a new routine to consolidate all cases; |
| // specifically for property redeclarations as well as for ivars. |
| QualType lhsType = |
| Context.getCanonicalType(PropType).getUnqualifiedType(); |
| QualType rhsType = |
| Context.getCanonicalType(IvarType).getUnqualifiedType(); |
| if (lhsType != rhsType && |
| lhsType->isArithmeticType()) { |
| Diag(PropertyLoc, diag::error_property_ivar_type) |
| << property->getDeclName() << Ivar->getDeclName(); |
| return 0; |
| } |
| // __weak is explicit. So it works on Canonical type. |
| if (PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak()) { |
| Diag(PropertyLoc, diag::error_weak_property) |
| << property->getDeclName() << Ivar->getDeclName(); |
| return 0; |
| } |
| if ((Context.isObjCObjectPointerType(property->getType()) || |
| PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak()) { |
| Diag(PropertyLoc, diag::error_strong_property) |
| << property->getDeclName() << Ivar->getDeclName(); |
| return 0; |
| } |
| } |
| } |
| } else if (PropertyIvar) { |
| // @dynamic |
| Diag(PropertyLoc, diag::error_dynamic_property_ivar_decl); |
| return 0; |
| } |
| assert (property && "ActOnPropertyImplDecl - property declaration missing"); |
| ObjCPropertyImplDecl *PIDecl = |
| ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc, |
| property, |
| (Synthesize ? |
| ObjCPropertyImplDecl::Synthesize |
| : ObjCPropertyImplDecl::Dynamic), |
| Ivar); |
| CurContext->addDecl(PIDecl); |
| if (IC) { |
| if (Synthesize) |
| if (ObjCPropertyImplDecl *PPIDecl = |
| IC->FindPropertyImplIvarDecl(PropertyIvar)) { |
| Diag(PropertyLoc, diag::error_duplicate_ivar_use) |
| << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier() |
| << PropertyIvar; |
| Diag(PPIDecl->getLocation(), diag::note_previous_use); |
| } |
| |
| if (ObjCPropertyImplDecl *PPIDecl = IC->FindPropertyImplDecl(PropertyId)) { |
| Diag(PropertyLoc, diag::error_property_implemented) << PropertyId; |
| Diag(PPIDecl->getLocation(), diag::note_previous_declaration); |
| return 0; |
| } |
| IC->addPropertyImplementation(PIDecl); |
| } |
| else { |
| if (Synthesize) |
| if (ObjCPropertyImplDecl *PPIDecl = |
| CatImplClass->FindPropertyImplIvarDecl(PropertyIvar)) { |
| Diag(PropertyLoc, diag::error_duplicate_ivar_use) |
| << PropertyId << PPIDecl->getPropertyDecl()->getIdentifier() |
| << PropertyIvar; |
| Diag(PPIDecl->getLocation(), diag::note_previous_use); |
| } |
| |
| if (ObjCPropertyImplDecl *PPIDecl = |
| CatImplClass->FindPropertyImplDecl(PropertyId)) { |
| Diag(PropertyLoc, diag::error_property_implemented) << PropertyId; |
| Diag(PPIDecl->getLocation(), diag::note_previous_declaration); |
| return 0; |
| } |
| CatImplClass->addPropertyImplementation(PIDecl); |
| } |
| |
| return PIDecl; |
| } |
| |
| bool Sema::CheckObjCDeclScope(Decl *D) { |
| if (isa<TranslationUnitDecl>(CurContext->getLookupContext())) |
| return false; |
| |
| Diag(D->getLocation(), diag::err_objc_decls_may_only_appear_in_global_scope); |
| D->setInvalidDecl(); |
| |
| return true; |
| } |
| |
| /// Collect the instance variables declared in an Objective-C object. Used in |
| /// the creation of structures from objects using the @defs directive. |
| /// FIXME: This should be consolidated with CollectObjCIvars as it is also |
| /// part of the AST generation logic of @defs. |
| static void CollectIvars(ObjCInterfaceDecl *Class, RecordDecl *Record, |
| ASTContext& Ctx, |
| llvm::SmallVectorImpl<Sema::DeclTy*> &ivars) { |
| if (Class->getSuperClass()) |
| CollectIvars(Class->getSuperClass(), Record, Ctx, ivars); |
| |
| // For each ivar, create a fresh ObjCAtDefsFieldDecl. |
| for (ObjCInterfaceDecl::ivar_iterator |
| I=Class->ivar_begin(), E=Class->ivar_end(); I!=E; ++I) { |
| |
| ObjCIvarDecl* ID = *I; |
| ivars.push_back(ObjCAtDefsFieldDecl::Create(Ctx, Record, |
| ID->getLocation(), |
| ID->getIdentifier(), |
| ID->getType(), |
| ID->getBitWidth())); |
| } |
| } |
| |
| /// Called whenever @defs(ClassName) is encountered in the source. Inserts the |
| /// instance variables of ClassName into Decls. |
| void Sema::ActOnDefs(Scope *S, DeclTy *TagD, SourceLocation DeclStart, |
| IdentifierInfo *ClassName, |
| llvm::SmallVectorImpl<DeclTy*> &Decls) { |
| // Check that ClassName is a valid class |
| ObjCInterfaceDecl *Class = getObjCInterfaceDecl(ClassName); |
| if (!Class) { |
| Diag(DeclStart, diag::err_undef_interface) << ClassName; |
| return; |
| } |
| // Collect the instance variables |
| CollectIvars(Class, dyn_cast<RecordDecl>((Decl*)TagD), Context, Decls); |
| |
| // Introduce all of these fields into the appropriate scope. |
| for (llvm::SmallVectorImpl<DeclTy*>::iterator D = Decls.begin(); |
| D != Decls.end(); ++D) { |
| FieldDecl *FD = cast<FieldDecl>((Decl*)*D); |
| if (getLangOptions().CPlusPlus) |
| PushOnScopeChains(cast<FieldDecl>(FD), S); |
| else if (RecordDecl *Record = dyn_cast<RecordDecl>((Decl*)TagD)) |
| Record->addDecl(FD); |
| } |
| } |
| |