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Diffstat (limited to 'clang/lib/Sema/SemaObjCProperty.cpp')
| -rw-r--r-- | clang/lib/Sema/SemaObjCProperty.cpp | 1953 |
1 files changed, 1953 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaObjCProperty.cpp b/clang/lib/Sema/SemaObjCProperty.cpp new file mode 100644 index 0000000..5ece8f1 --- /dev/null +++ b/clang/lib/Sema/SemaObjCProperty.cpp @@ -0,0 +1,1953 @@ +//===--- SemaObjCProperty.cpp - Semantic Analysis for ObjC @property ------===// +// +// 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 @property and +// @synthesize declarations. +// +//===----------------------------------------------------------------------===// + +#include "clang/Sema/SemaInternal.h" +#include "clang/Sema/Initialization.h" +#include "clang/AST/DeclObjC.h" +#include "clang/AST/ExprObjC.h" +#include "clang/AST/ExprCXX.h" +#include "clang/AST/ASTMutationListener.h" +#include "llvm/ADT/DenseSet.h" +#include "llvm/ADT/SmallString.h" + +using namespace clang; + +//===----------------------------------------------------------------------===// +// Grammar actions. +//===----------------------------------------------------------------------===// + +/// getImpliedARCOwnership - Given a set of property attributes and a +/// type, infer an expected lifetime. The type's ownership qualification +/// is not considered. +/// +/// Returns OCL_None if the attributes as stated do not imply an ownership. +/// Never returns OCL_Autoreleasing. +static Qualifiers::ObjCLifetime getImpliedARCOwnership( + ObjCPropertyDecl::PropertyAttributeKind attrs, + QualType type) { + // retain, strong, copy, weak, and unsafe_unretained are only legal + // on properties of retainable pointer type. + if (attrs & (ObjCPropertyDecl::OBJC_PR_retain | + ObjCPropertyDecl::OBJC_PR_strong | + ObjCPropertyDecl::OBJC_PR_copy)) { + return type->getObjCARCImplicitLifetime(); + } else if (attrs & ObjCPropertyDecl::OBJC_PR_weak) { + return Qualifiers::OCL_Weak; + } else if (attrs & ObjCPropertyDecl::OBJC_PR_unsafe_unretained) { + return Qualifiers::OCL_ExplicitNone; + } + + // assign can appear on other types, so we have to check the + // property type. + if (attrs & ObjCPropertyDecl::OBJC_PR_assign && + type->isObjCRetainableType()) { + return Qualifiers::OCL_ExplicitNone; + } + + return Qualifiers::OCL_None; +} + +/// Check the internal consistency of a property declaration. +static void checkARCPropertyDecl(Sema &S, ObjCPropertyDecl *property) { + if (property->isInvalidDecl()) return; + + ObjCPropertyDecl::PropertyAttributeKind propertyKind + = property->getPropertyAttributes(); + Qualifiers::ObjCLifetime propertyLifetime + = property->getType().getObjCLifetime(); + + // Nothing to do if we don't have a lifetime. + if (propertyLifetime == Qualifiers::OCL_None) return; + + Qualifiers::ObjCLifetime expectedLifetime + = getImpliedARCOwnership(propertyKind, property->getType()); + if (!expectedLifetime) { + // We have a lifetime qualifier but no dominating property + // attribute. That's okay, but restore reasonable invariants by + // setting the property attribute according to the lifetime + // qualifier. + ObjCPropertyDecl::PropertyAttributeKind attr; + if (propertyLifetime == Qualifiers::OCL_Strong) { + attr = ObjCPropertyDecl::OBJC_PR_strong; + } else if (propertyLifetime == Qualifiers::OCL_Weak) { + attr = ObjCPropertyDecl::OBJC_PR_weak; + } else { + assert(propertyLifetime == Qualifiers::OCL_ExplicitNone); + attr = ObjCPropertyDecl::OBJC_PR_unsafe_unretained; + } + property->setPropertyAttributes(attr); + return; + } + + if (propertyLifetime == expectedLifetime) return; + + property->setInvalidDecl(); + S.Diag(property->getLocation(), + diag::err_arc_inconsistent_property_ownership) + << property->getDeclName() + << expectedLifetime + << propertyLifetime; +} + +Decl *Sema::ActOnProperty(Scope *S, SourceLocation AtLoc, + SourceLocation LParenLoc, + FieldDeclarator &FD, + ObjCDeclSpec &ODS, + Selector GetterSel, + Selector SetterSel, + bool *isOverridingProperty, + tok::ObjCKeywordKind MethodImplKind, + DeclContext *lexicalDC) { + unsigned Attributes = ODS.getPropertyAttributes(); + TypeSourceInfo *TSI = GetTypeForDeclarator(FD.D, S); + QualType T = TSI->getType(); + if ((getLangOpts().getGC() != LangOptions::NonGC && + T.isObjCGCWeak()) || + (getLangOpts().ObjCAutoRefCount && + T.getObjCLifetime() == Qualifiers::OCL_Weak)) + Attributes |= ObjCDeclSpec::DQ_PR_weak; + + 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_strong) && + !(Attributes & ObjCDeclSpec::DQ_PR_copy) && + !(Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) && + !(Attributes & ObjCDeclSpec::DQ_PR_weak))); + + // Proceed with constructing the ObjCPropertDecls. + ObjCContainerDecl *ClassDecl = cast<ObjCContainerDecl>(CurContext); + + if (ObjCCategoryDecl *CDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) + if (CDecl->IsClassExtension()) { + Decl *Res = HandlePropertyInClassExtension(S, AtLoc, LParenLoc, + FD, GetterSel, SetterSel, + isAssign, isReadWrite, + Attributes, + ODS.getPropertyAttributes(), + isOverridingProperty, TSI, + MethodImplKind); + if (Res) { + CheckObjCPropertyAttributes(Res, AtLoc, Attributes); + if (getLangOpts().ObjCAutoRefCount) + checkARCPropertyDecl(*this, cast<ObjCPropertyDecl>(Res)); + } + return Res; + } + + ObjCPropertyDecl *Res = CreatePropertyDecl(S, ClassDecl, AtLoc, LParenLoc, FD, + GetterSel, SetterSel, + isAssign, isReadWrite, + Attributes, + ODS.getPropertyAttributes(), + TSI, MethodImplKind); + if (lexicalDC) + Res->setLexicalDeclContext(lexicalDC); + + // Validate the attributes on the @property. + CheckObjCPropertyAttributes(Res, AtLoc, Attributes); + + if (getLangOpts().ObjCAutoRefCount) + checkARCPropertyDecl(*this, Res); + + return Res; +} + +static ObjCPropertyDecl::PropertyAttributeKind +makePropertyAttributesAsWritten(unsigned Attributes) { + unsigned attributesAsWritten = 0; + if (Attributes & ObjCDeclSpec::DQ_PR_readonly) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readonly; + if (Attributes & ObjCDeclSpec::DQ_PR_readwrite) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_readwrite; + if (Attributes & ObjCDeclSpec::DQ_PR_getter) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_getter; + if (Attributes & ObjCDeclSpec::DQ_PR_setter) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_setter; + if (Attributes & ObjCDeclSpec::DQ_PR_assign) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_assign; + if (Attributes & ObjCDeclSpec::DQ_PR_retain) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_retain; + if (Attributes & ObjCDeclSpec::DQ_PR_strong) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_strong; + if (Attributes & ObjCDeclSpec::DQ_PR_weak) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_weak; + if (Attributes & ObjCDeclSpec::DQ_PR_copy) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_copy; + if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_unsafe_unretained; + if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_nonatomic; + if (Attributes & ObjCDeclSpec::DQ_PR_atomic) + attributesAsWritten |= ObjCPropertyDecl::OBJC_PR_atomic; + + return (ObjCPropertyDecl::PropertyAttributeKind)attributesAsWritten; +} + +Decl * +Sema::HandlePropertyInClassExtension(Scope *S, + SourceLocation AtLoc, + SourceLocation LParenLoc, + FieldDeclarator &FD, + Selector GetterSel, Selector SetterSel, + const bool isAssign, + const bool isReadWrite, + const unsigned Attributes, + const unsigned AttributesAsWritten, + bool *isOverridingProperty, + TypeSourceInfo *T, + tok::ObjCKeywordKind MethodImplKind) { + ObjCCategoryDecl *CDecl = cast<ObjCCategoryDecl>(CurContext); + // Diagnose if this property is already in continuation class. + DeclContext *DC = CurContext; + IdentifierInfo *PropertyId = FD.D.getIdentifier(); + ObjCInterfaceDecl *CCPrimary = CDecl->getClassInterface(); + + if (CCPrimary) + // Check for duplicate declaration of this property in current and + // other class extensions. + for (const ObjCCategoryDecl *ClsExtDecl = + CCPrimary->getFirstClassExtension(); + ClsExtDecl; ClsExtDecl = ClsExtDecl->getNextClassExtension()) { + if (ObjCPropertyDecl *prevDecl = + ObjCPropertyDecl::findPropertyDecl(ClsExtDecl, PropertyId)) { + Diag(AtLoc, diag::err_duplicate_property); + Diag(prevDecl->getLocation(), diag::note_property_declare); + return 0; + } + } + + // Create a new ObjCPropertyDecl with the DeclContext being + // the class extension. + // FIXME. We should really be using CreatePropertyDecl for this. + ObjCPropertyDecl *PDecl = + ObjCPropertyDecl::Create(Context, DC, FD.D.getIdentifierLoc(), + PropertyId, AtLoc, LParenLoc, T); + PDecl->setPropertyAttributesAsWritten( + makePropertyAttributesAsWritten(AttributesAsWritten)); + if (Attributes & ObjCDeclSpec::DQ_PR_readonly) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readonly); + if (Attributes & ObjCDeclSpec::DQ_PR_readwrite) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_readwrite); + // Set setter/getter selector name. Needed later. + PDecl->setGetterName(GetterSel); + PDecl->setSetterName(SetterSel); + ProcessDeclAttributes(S, PDecl, FD.D); + DC->addDecl(PDecl); + + // We need to look in the @interface to see if the @property was + // already declared. + if (!CCPrimary) { + Diag(CDecl->getLocation(), diag::err_continuation_class); + *isOverridingProperty = true; + return 0; + } + + // Find the property in continuation class's primary class only. + ObjCPropertyDecl *PIDecl = + CCPrimary->FindPropertyVisibleInPrimaryClass(PropertyId); + + if (!PIDecl) { + // No matching property found in the primary class. Just fall thru + // and add property to continuation class's primary class. + ObjCPropertyDecl *PrimaryPDecl = + CreatePropertyDecl(S, CCPrimary, AtLoc, LParenLoc, + FD, GetterSel, SetterSel, isAssign, isReadWrite, + Attributes,AttributesAsWritten, T, MethodImplKind, DC); + + // A case of continuation class adding a new property in the class. This + // is not what it was meant for. However, gcc supports it and so should we. + // Make sure setter/getters are declared here. + ProcessPropertyDecl(PrimaryPDecl, CCPrimary, /* redeclaredProperty = */ 0, + /* lexicalDC = */ CDecl); + PDecl->setGetterMethodDecl(PrimaryPDecl->getGetterMethodDecl()); + PDecl->setSetterMethodDecl(PrimaryPDecl->getSetterMethodDecl()); + if (ASTMutationListener *L = Context.getASTMutationListener()) + L->AddedObjCPropertyInClassExtension(PrimaryPDecl, /*OrigProp=*/0, CDecl); + return PrimaryPDecl; + } + if (!Context.hasSameType(PIDecl->getType(), PDecl->getType())) { + bool IncompatibleObjC = false; + QualType ConvertedType; + // Relax the strict type matching for property type in continuation class. + // Allow property object type of continuation class to be different as long + // as it narrows the object type in its primary class property. Note that + // this conversion is safe only because the wider type is for a 'readonly' + // property in primary class and 'narrowed' type for a 'readwrite' property + // in continuation class. + if (!isa<ObjCObjectPointerType>(PIDecl->getType()) || + !isa<ObjCObjectPointerType>(PDecl->getType()) || + (!isObjCPointerConversion(PDecl->getType(), PIDecl->getType(), + ConvertedType, IncompatibleObjC)) + || IncompatibleObjC) { + Diag(AtLoc, + diag::err_type_mismatch_continuation_class) << PDecl->getType(); + Diag(PIDecl->getLocation(), diag::note_property_declare); + } + } + + // The property 'PIDecl's readonly attribute will be over-ridden + // with continuation class's readwrite property attribute! + unsigned PIkind = PIDecl->getPropertyAttributesAsWritten(); + if (isReadWrite && (PIkind & ObjCPropertyDecl::OBJC_PR_readonly)) { + unsigned retainCopyNonatomic = + (ObjCPropertyDecl::OBJC_PR_retain | + ObjCPropertyDecl::OBJC_PR_strong | + ObjCPropertyDecl::OBJC_PR_copy | + ObjCPropertyDecl::OBJC_PR_nonatomic); + if ((Attributes & retainCopyNonatomic) != + (PIkind & retainCopyNonatomic)) { + Diag(AtLoc, diag::warn_property_attr_mismatch); + Diag(PIDecl->getLocation(), diag::note_property_declare); + } + DeclContext *DC = cast<DeclContext>(CCPrimary); + if (!ObjCPropertyDecl::findPropertyDecl(DC, + PIDecl->getDeclName().getAsIdentifierInfo())) { + // Protocol is not in the primary class. Must build one for it. + ObjCDeclSpec ProtocolPropertyODS; + // FIXME. Assuming that ObjCDeclSpec::ObjCPropertyAttributeKind + // and ObjCPropertyDecl::PropertyAttributeKind have identical + // values. Should consolidate both into one enum type. + ProtocolPropertyODS. + setPropertyAttributes((ObjCDeclSpec::ObjCPropertyAttributeKind) + PIkind); + // Must re-establish the context from class extension to primary + // class context. + ContextRAII SavedContext(*this, CCPrimary); + + Decl *ProtocolPtrTy = + ActOnProperty(S, AtLoc, LParenLoc, FD, ProtocolPropertyODS, + PIDecl->getGetterName(), + PIDecl->getSetterName(), + isOverridingProperty, + MethodImplKind, + /* lexicalDC = */ CDecl); + PIDecl = cast<ObjCPropertyDecl>(ProtocolPtrTy); + } + PIDecl->makeitReadWriteAttribute(); + if (Attributes & ObjCDeclSpec::DQ_PR_retain) + PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_retain); + if (Attributes & ObjCDeclSpec::DQ_PR_strong) + PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong); + if (Attributes & ObjCDeclSpec::DQ_PR_copy) + PIDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy); + PIDecl->setSetterName(SetterSel); + } else { + // Tailor the diagnostics for the common case where a readwrite + // property is declared both in the @interface and the continuation. + // This is a common error where the user often intended the original + // declaration to be readonly. + unsigned diag = + (Attributes & ObjCDeclSpec::DQ_PR_readwrite) && + (PIkind & ObjCPropertyDecl::OBJC_PR_readwrite) + ? diag::err_use_continuation_class_redeclaration_readwrite + : diag::err_use_continuation_class; + Diag(AtLoc, diag) + << CCPrimary->getDeclName(); + Diag(PIDecl->getLocation(), diag::note_property_declare); + } + *isOverridingProperty = true; + // Make sure setter decl is synthesized, and added to primary class's list. + ProcessPropertyDecl(PIDecl, CCPrimary, PDecl, CDecl); + PDecl->setGetterMethodDecl(PIDecl->getGetterMethodDecl()); + PDecl->setSetterMethodDecl(PIDecl->getSetterMethodDecl()); + if (ASTMutationListener *L = Context.getASTMutationListener()) + L->AddedObjCPropertyInClassExtension(PDecl, PIDecl, CDecl); + return 0; +} + +ObjCPropertyDecl *Sema::CreatePropertyDecl(Scope *S, + ObjCContainerDecl *CDecl, + SourceLocation AtLoc, + SourceLocation LParenLoc, + FieldDeclarator &FD, + Selector GetterSel, + Selector SetterSel, + const bool isAssign, + const bool isReadWrite, + const unsigned Attributes, + const unsigned AttributesAsWritten, + TypeSourceInfo *TInfo, + tok::ObjCKeywordKind MethodImplKind, + DeclContext *lexicalDC){ + IdentifierInfo *PropertyId = FD.D.getIdentifier(); + QualType T = TInfo->getType(); + + // Issue a warning if property is 'assign' as default and its object, which is + // gc'able conforms to NSCopying protocol + if (getLangOpts().getGC() != LangOptions::NonGC && + isAssign && !(Attributes & ObjCDeclSpec::DQ_PR_assign)) + if (const ObjCObjectPointerType *ObjPtrTy = + T->getAs<ObjCObjectPointerType>()) { + ObjCInterfaceDecl *IDecl = ObjPtrTy->getObjectType()->getInterface(); + if (IDecl) + if (ObjCProtocolDecl* PNSCopying = + LookupProtocol(&Context.Idents.get("NSCopying"), AtLoc)) + if (IDecl->ClassImplementsProtocol(PNSCopying, true)) + Diag(AtLoc, diag::warn_implements_nscopying) << PropertyId; + } + if (T->isObjCObjectType()) + Diag(FD.D.getIdentifierLoc(), diag::err_statically_allocated_object); + + DeclContext *DC = cast<DeclContext>(CDecl); + ObjCPropertyDecl *PDecl = ObjCPropertyDecl::Create(Context, DC, + FD.D.getIdentifierLoc(), + PropertyId, AtLoc, LParenLoc, TInfo); + + if (ObjCPropertyDecl *prevDecl = + ObjCPropertyDecl::findPropertyDecl(DC, PropertyId)) { + Diag(PDecl->getLocation(), diag::err_duplicate_property); + Diag(prevDecl->getLocation(), diag::note_property_declare); + PDecl->setInvalidDecl(); + } + else { + DC->addDecl(PDecl); + if (lexicalDC) + PDecl->setLexicalDeclContext(lexicalDC); + } + + if (T->isArrayType() || T->isFunctionType()) { + Diag(AtLoc, diag::err_property_type) << T; + PDecl->setInvalidDecl(); + } + + ProcessDeclAttributes(S, 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); + PDecl->setPropertyAttributesAsWritten( + makePropertyAttributesAsWritten(AttributesAsWritten)); + + 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_strong) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong); + + if (Attributes & ObjCDeclSpec::DQ_PR_weak) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak); + + if (Attributes & ObjCDeclSpec::DQ_PR_copy) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_copy); + + if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained); + + if (isAssign) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign); + + // In the semantic attributes, one of nonatomic or atomic is always set. + if (Attributes & ObjCDeclSpec::DQ_PR_nonatomic) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_nonatomic); + else + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_atomic); + + // 'unsafe_unretained' is alias for 'assign'. + if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_assign); + if (isAssign) + PDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_unsafe_unretained); + + if (MethodImplKind == tok::objc_required) + PDecl->setPropertyImplementation(ObjCPropertyDecl::Required); + else if (MethodImplKind == tok::objc_optional) + PDecl->setPropertyImplementation(ObjCPropertyDecl::Optional); + + return PDecl; +} + +static void checkARCPropertyImpl(Sema &S, SourceLocation propertyImplLoc, + ObjCPropertyDecl *property, + ObjCIvarDecl *ivar) { + if (property->isInvalidDecl() || ivar->isInvalidDecl()) return; + + QualType ivarType = ivar->getType(); + Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime(); + + // The lifetime implied by the property's attributes. + Qualifiers::ObjCLifetime propertyLifetime = + getImpliedARCOwnership(property->getPropertyAttributes(), + property->getType()); + + // We're fine if they match. + if (propertyLifetime == ivarLifetime) return; + + // These aren't valid lifetimes for object ivars; don't diagnose twice. + if (ivarLifetime == Qualifiers::OCL_None || + ivarLifetime == Qualifiers::OCL_Autoreleasing) + return; + + switch (propertyLifetime) { + case Qualifiers::OCL_Strong: + S.Diag(propertyImplLoc, diag::err_arc_strong_property_ownership) + << property->getDeclName() + << ivar->getDeclName() + << ivarLifetime; + break; + + case Qualifiers::OCL_Weak: + S.Diag(propertyImplLoc, diag::error_weak_property) + << property->getDeclName() + << ivar->getDeclName(); + break; + + case Qualifiers::OCL_ExplicitNone: + S.Diag(propertyImplLoc, diag::err_arc_assign_property_ownership) + << property->getDeclName() + << ivar->getDeclName() + << ((property->getPropertyAttributesAsWritten() + & ObjCPropertyDecl::OBJC_PR_assign) != 0); + break; + + case Qualifiers::OCL_Autoreleasing: + llvm_unreachable("properties cannot be autoreleasing"); + + case Qualifiers::OCL_None: + // Any other property should be ignored. + return; + } + + S.Diag(property->getLocation(), diag::note_property_declare); +} + +/// setImpliedPropertyAttributeForReadOnlyProperty - +/// This routine evaludates life-time attributes for a 'readonly' +/// property with no known lifetime of its own, using backing +/// 'ivar's attribute, if any. If no backing 'ivar', property's +/// life-time is assumed 'strong'. +static void setImpliedPropertyAttributeForReadOnlyProperty( + ObjCPropertyDecl *property, ObjCIvarDecl *ivar) { + Qualifiers::ObjCLifetime propertyLifetime = + getImpliedARCOwnership(property->getPropertyAttributes(), + property->getType()); + if (propertyLifetime != Qualifiers::OCL_None) + return; + + if (!ivar) { + // if no backing ivar, make property 'strong'. + property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong); + return; + } + // property assumes owenership of backing ivar. + QualType ivarType = ivar->getType(); + Qualifiers::ObjCLifetime ivarLifetime = ivarType.getObjCLifetime(); + if (ivarLifetime == Qualifiers::OCL_Strong) + property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong); + else if (ivarLifetime == Qualifiers::OCL_Weak) + property->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_weak); + return; +} + +/// ActOnPropertyImplDecl - This routine performs semantic checks and +/// builds the AST node for a property implementation declaration; declared +/// as @synthesize or @dynamic. +/// +Decl *Sema::ActOnPropertyImplDecl(Scope *S, + SourceLocation AtLoc, + SourceLocation PropertyLoc, + bool Synthesize, + IdentifierInfo *PropertyId, + IdentifierInfo *PropertyIvar, + SourceLocation PropertyIvarLoc) { + ObjCContainerDecl *ClassImpDecl = + dyn_cast<ObjCContainerDecl>(CurContext); + // Make sure we have a context for the property implementation declaration. + if (!ClassImpDecl) { + Diag(AtLoc, diag::error_missing_property_context); + return 0; + } + if (PropertyIvarLoc.isInvalid()) + PropertyIvarLoc = PropertyLoc; + 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; + } + unsigned PIkind = property->getPropertyAttributesAsWritten(); + if ((PIkind & (ObjCPropertyDecl::OBJC_PR_atomic | + ObjCPropertyDecl::OBJC_PR_nonatomic) ) == 0) { + if (AtLoc.isValid()) + Diag(AtLoc, diag::warn_implicit_atomic_property); + else + Diag(IC->getLocation(), diag::warn_auto_implicit_atomic_property); + Diag(property->getLocation(), diag::note_property_declare); + } + + if (const ObjCCategoryDecl *CD = + dyn_cast<ObjCCategoryDecl>(property->getDeclContext())) { + if (!CD->IsClassExtension()) { + Diag(PropertyLoc, diag::error_category_property) << CD->getDeclName(); + Diag(property->getLocation(), diag::note_property_declare); + 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 + ObjCInterfaceDecl *ClassDeclared; + Ivar = IDecl->lookupInstanceVariable(PropertyIvar, ClassDeclared); + QualType PropType = property->getType(); + QualType PropertyIvarType = PropType.getNonReferenceType(); + + if (getLangOpts().ObjCAutoRefCount && + (property->getPropertyAttributesAsWritten() & + ObjCPropertyDecl::OBJC_PR_readonly) && + PropertyIvarType->isObjCRetainableType()) { + setImpliedPropertyAttributeForReadOnlyProperty(property, Ivar); + } + + ObjCPropertyDecl::PropertyAttributeKind kind + = property->getPropertyAttributes(); + + // Add GC __weak to the ivar type if the property is weak. + if ((kind & ObjCPropertyDecl::OBJC_PR_weak) && + getLangOpts().getGC() != LangOptions::NonGC) { + assert(!getLangOpts().ObjCAutoRefCount); + if (PropertyIvarType.isObjCGCStrong()) { + Diag(PropertyLoc, diag::err_gc_weak_property_strong_type); + Diag(property->getLocation(), diag::note_property_declare); + } else { + PropertyIvarType = + Context.getObjCGCQualType(PropertyIvarType, Qualifiers::Weak); + } + } + + if (!Ivar) { + // In ARC, give the ivar a lifetime qualifier based on the + // property attributes. + if (getLangOpts().ObjCAutoRefCount && + !PropertyIvarType.getObjCLifetime() && + PropertyIvarType->isObjCRetainableType()) { + + // It's an error if we have to do this and the user didn't + // explicitly write an ownership attribute on the property. + if (!property->hasWrittenStorageAttribute() && + !(kind & ObjCPropertyDecl::OBJC_PR_strong)) { + Diag(PropertyLoc, + diag::err_arc_objc_property_default_assign_on_object); + Diag(property->getLocation(), diag::note_property_declare); + } else { + Qualifiers::ObjCLifetime lifetime = + getImpliedARCOwnership(kind, PropertyIvarType); + assert(lifetime && "no lifetime for property?"); + if (lifetime == Qualifiers::OCL_Weak) { + bool err = false; + if (const ObjCObjectPointerType *ObjT = + PropertyIvarType->getAs<ObjCObjectPointerType>()) + if (ObjT->getInterfaceDecl()->isArcWeakrefUnavailable()) { + Diag(PropertyLoc, diag::err_arc_weak_unavailable_property); + Diag(property->getLocation(), diag::note_property_declare); + err = true; + } + if (!err && !getLangOpts().ObjCRuntimeHasWeak) { + Diag(PropertyLoc, diag::err_arc_weak_no_runtime); + Diag(property->getLocation(), diag::note_property_declare); + } + } + + Qualifiers qs; + qs.addObjCLifetime(lifetime); + PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs); + } + } + + if (kind & ObjCPropertyDecl::OBJC_PR_weak && + !getLangOpts().ObjCAutoRefCount && + getLangOpts().getGC() == LangOptions::NonGC) { + Diag(PropertyLoc, diag::error_synthesize_weak_non_arc_or_gc); + Diag(property->getLocation(), diag::note_property_declare); + } + + Ivar = ObjCIvarDecl::Create(Context, ClassImpDecl, + PropertyIvarLoc,PropertyIvarLoc, PropertyIvar, + PropertyIvarType, /*Dinfo=*/0, + ObjCIvarDecl::Private, + (Expr *)0, true); + ClassImpDecl->addDecl(Ivar); + IDecl->makeDeclVisibleInContext(Ivar); + property->setPropertyIvarDecl(Ivar); + + if (!getLangOpts().ObjCNonFragileABI) + Diag(PropertyLoc, diag::error_missing_property_ivar_decl) << PropertyId; + // Note! I deliberately want it to fall thru so, we have a + // a property implementation and to avoid future warnings. + } else if (getLangOpts().ObjCNonFragileABI && + !declaresSameEntity(ClassDeclared, IDecl)) { + Diag(PropertyLoc, diag::error_ivar_in_superclass_use) + << property->getDeclName() << Ivar->getDeclName() + << ClassDeclared->getDeclName(); + Diag(Ivar->getLocation(), diag::note_previous_access_declaration) + << Ivar << Ivar->getName(); + // Note! I deliberately want it to fall thru so more errors are caught. + } + QualType IvarType = Context.getCanonicalType(Ivar->getType()); + + // Check that type of property and its ivar are type compatible. + if (Context.getCanonicalType(PropertyIvarType) != IvarType) { + bool compat = false; + if (isa<ObjCObjectPointerType>(PropertyIvarType) + && isa<ObjCObjectPointerType>(IvarType)) + compat = + Context.canAssignObjCInterfaces( + PropertyIvarType->getAs<ObjCObjectPointerType>(), + IvarType->getAs<ObjCObjectPointerType>()); + else { + compat = (CheckAssignmentConstraints(PropertyIvarLoc, PropertyIvarType, + IvarType) + == Compatible); + } + if (!compat) { + Diag(PropertyLoc, diag::error_property_ivar_type) + << property->getDeclName() << PropType + << Ivar->getDeclName() << IvarType; + Diag(Ivar->getLocation(), diag::note_ivar_decl); + // Note! I deliberately want it to fall thru so, we have a + // a property implementation and to avoid future warnings. + } + + // 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(PropertyIvarType).getUnqualifiedType(); + QualType rhsType =Context.getCanonicalType(IvarType).getUnqualifiedType(); + if (lhsType != rhsType && + lhsType->isArithmeticType()) { + Diag(PropertyLoc, diag::error_property_ivar_type) + << property->getDeclName() << PropType + << Ivar->getDeclName() << IvarType; + Diag(Ivar->getLocation(), diag::note_ivar_decl); + // Fall thru - see previous comment + } + // __weak is explicit. So it works on Canonical type. + if ((PropType.isObjCGCWeak() && !IvarType.isObjCGCWeak() && + getLangOpts().getGC() != LangOptions::NonGC)) { + Diag(PropertyLoc, diag::error_weak_property) + << property->getDeclName() << Ivar->getDeclName(); + Diag(Ivar->getLocation(), diag::note_ivar_decl); + // Fall thru - see previous comment + } + // Fall thru - see previous comment + if ((property->getType()->isObjCObjectPointerType() || + PropType.isObjCGCStrong()) && IvarType.isObjCGCWeak() && + getLangOpts().getGC() != LangOptions::NonGC) { + Diag(PropertyLoc, diag::error_strong_property) + << property->getDeclName() << Ivar->getDeclName(); + // Fall thru - see previous comment + } + } + if (getLangOpts().ObjCAutoRefCount) + checkARCPropertyImpl(*this, PropertyLoc, property, Ivar); + } else if (PropertyIvar) + // @dynamic + Diag(PropertyLoc, diag::error_dynamic_property_ivar_decl); + + assert (property && "ActOnPropertyImplDecl - property declaration missing"); + ObjCPropertyImplDecl *PIDecl = + ObjCPropertyImplDecl::Create(Context, CurContext, AtLoc, PropertyLoc, + property, + (Synthesize ? + ObjCPropertyImplDecl::Synthesize + : ObjCPropertyImplDecl::Dynamic), + Ivar, PropertyIvarLoc); + if (ObjCMethodDecl *getterMethod = property->getGetterMethodDecl()) { + getterMethod->createImplicitParams(Context, IDecl); + if (getLangOpts().CPlusPlus && Synthesize && + Ivar->getType()->isRecordType()) { + // For Objective-C++, need to synthesize the AST for the IVAR object to be + // returned by the getter as it must conform to C++'s copy-return rules. + // FIXME. Eventually we want to do this for Objective-C as well. + ImplicitParamDecl *SelfDecl = getterMethod->getSelfDecl(); + DeclRefExpr *SelfExpr = + new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(), + VK_RValue, SourceLocation()); + Expr *IvarRefExpr = + new (Context) ObjCIvarRefExpr(Ivar, Ivar->getType(), AtLoc, + SelfExpr, true, true); + ExprResult Res = + PerformCopyInitialization(InitializedEntity::InitializeResult( + SourceLocation(), + getterMethod->getResultType(), + /*NRVO=*/false), + SourceLocation(), + Owned(IvarRefExpr)); + if (!Res.isInvalid()) { + Expr *ResExpr = Res.takeAs<Expr>(); + if (ResExpr) + ResExpr = MaybeCreateExprWithCleanups(ResExpr); + PIDecl->setGetterCXXConstructor(ResExpr); + } + } + if (property->hasAttr<NSReturnsNotRetainedAttr>() && + !getterMethod->hasAttr<NSReturnsNotRetainedAttr>()) { + Diag(getterMethod->getLocation(), + diag::warn_property_getter_owning_mismatch); + Diag(property->getLocation(), diag::note_property_declare); + } + } + if (ObjCMethodDecl *setterMethod = property->getSetterMethodDecl()) { + setterMethod->createImplicitParams(Context, IDecl); + if (getLangOpts().CPlusPlus && Synthesize + && Ivar->getType()->isRecordType()) { + // FIXME. Eventually we want to do this for Objective-C as well. + ImplicitParamDecl *SelfDecl = setterMethod->getSelfDecl(); + DeclRefExpr *SelfExpr = + new (Context) DeclRefExpr(SelfDecl, false, SelfDecl->getType(), + VK_RValue, SourceLocation()); + Expr *lhs = + new (Context) ObjCIvarRefExpr(Ivar, Ivar->getType(), AtLoc, + SelfExpr, true, true); + ObjCMethodDecl::param_iterator P = setterMethod->param_begin(); + ParmVarDecl *Param = (*P); + QualType T = Param->getType().getNonReferenceType(); + Expr *rhs = new (Context) DeclRefExpr(Param, false, T, + VK_LValue, SourceLocation()); + ExprResult Res = BuildBinOp(S, lhs->getLocEnd(), + BO_Assign, lhs, rhs); + if (property->getPropertyAttributes() & + ObjCPropertyDecl::OBJC_PR_atomic) { + Expr *callExpr = Res.takeAs<Expr>(); + if (const CXXOperatorCallExpr *CXXCE = + dyn_cast_or_null<CXXOperatorCallExpr>(callExpr)) + if (const FunctionDecl *FuncDecl = CXXCE->getDirectCallee()) + if (!FuncDecl->isTrivial()) + if (property->getType()->isReferenceType()) { + Diag(PropertyLoc, + diag::err_atomic_property_nontrivial_assign_op) + << property->getType(); + Diag(FuncDecl->getLocStart(), + diag::note_callee_decl) << FuncDecl; + } + } + PIDecl->setSetterCXXAssignment(Res.takeAs<Expr>()); + } + } + + 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); + if (getLangOpts().ObjCDefaultSynthProperties && + getLangOpts().ObjCNonFragileABI2 && + !IDecl->isObjCRequiresPropertyDefs()) { + // Diagnose if an ivar was lazily synthesdized due to a previous + // use and if 1) property is @dynamic or 2) property is synthesized + // but it requires an ivar of different name. + ObjCInterfaceDecl *ClassDeclared=0; + ObjCIvarDecl *Ivar = 0; + if (!Synthesize) + Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared); + else { + if (PropertyIvar && PropertyIvar != PropertyId) + Ivar = IDecl->lookupInstanceVariable(PropertyId, ClassDeclared); + } + // Issue diagnostics only if Ivar belongs to current class. + if (Ivar && Ivar->getSynthesize() && + declaresSameEntity(IC->getClassInterface(), ClassDeclared)) { + Diag(Ivar->getLocation(), diag::err_undeclared_var_use) + << PropertyId; + Ivar->setInvalidDecl(); + } + } + } 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; +} + +//===----------------------------------------------------------------------===// +// Helper methods. +//===----------------------------------------------------------------------===// + +/// 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 (!(SAttr & ObjCPropertyDecl::OBJC_PR_readonly)){ + unsigned CAttrRetain = + (CAttr & + (ObjCPropertyDecl::OBJC_PR_retain | ObjCPropertyDecl::OBJC_PR_strong)); + unsigned SAttrRetain = + (SAttr & + (ObjCPropertyDecl::OBJC_PR_retain | ObjCPropertyDecl::OBJC_PR_strong)); + bool CStrong = (CAttrRetain != 0); + bool SStrong = (SAttrRetain != 0); + if (CStrong != SStrong) + Diag(Property->getLocation(), diag::warn_property_attribute) + << Property->getDeclName() << "retain (or strong)" << 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.propertyTypesAreCompatible(LHSType, RHSType)) { + // Do cases not handled in above. + // FIXME. For future support of covariant property types, revisit this. + bool IncompatibleObjC = false; + QualType ConvertedType; + if (!isObjCPointerConversion(RHSType, LHSType, + ConvertedType, IncompatibleObjC) || + IncompatibleObjC) { + Diag(Property->getLocation(), diag::warn_property_types_are_incompatible) + << Property->getType() << SuperProperty->getType() << inheritedName; + Diag(SuperProperty->getLocation(), diag::note_property_declare); + } + } +} + +bool Sema::DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *property, + ObjCMethodDecl *GetterMethod, + SourceLocation Loc) { + if (GetterMethod && + !Context.hasSameType(GetterMethod->getResultType().getNonReferenceType(), + property->getType().getNonReferenceType())) { + AssignConvertType result = Incompatible; + if (property->getType()->isObjCObjectPointerType()) + result = CheckAssignmentConstraints(Loc, GetterMethod->getResultType(), + property->getType()); + if (result != Compatible) { + Diag(Loc, diag::warn_accessor_property_type_mismatch) + << property->getDeclName() + << GetterMethod->getSelector(); + Diag(GetterMethod->getLocation(), diag::note_declared_at); + return true; + } + } + return false; +} + +/// ComparePropertiesInBaseAndSuper - This routine compares property +/// declarations in base and its super class, if any, and issues +/// diagnostics in a variety of inconsistent 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()); + } + } +} + +/// MatchOneProtocolPropertiesInClass - This routine goes thru the list +/// of properties declared in a protocol and compares their attribute against +/// the same property declared in the class or category. +void +Sema::MatchOneProtocolPropertiesInClass(Decl *CDecl, + ObjCProtocolDecl *PDecl) { + ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDecl); + if (!IDecl) { + // Category + ObjCCategoryDecl *CatDecl = static_cast<ObjCCategoryDecl*>(CDecl); + assert (CatDecl && "MatchOneProtocolPropertiesInClass"); + if (!CatDecl->IsClassExtension()) + 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()); + } +} + +/// CompareProperties - This routine compares properties +/// declared in 'ClassOrProtocol' objects (which can be a class or an +/// inherited protocol with the list of properties for class/category 'CDecl' +/// +void Sema::CompareProperties(Decl *CDecl, Decl *ClassOrProtocol) { + Decl *ClassDecl = ClassOrProtocol; + ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDecl); + + if (!IDecl) { + // Category + ObjCCategoryDecl *CatDecl = static_cast<ObjCCategoryDecl*>(CDecl); + assert (CatDecl && "CompareProperties"); + if (ObjCCategoryDecl *MDecl = dyn_cast<ObjCCategoryDecl>(ClassDecl)) { + for (ObjCCategoryDecl::protocol_iterator P = MDecl->protocol_begin(), + E = MDecl->protocol_end(); P != E; ++P) + // Match properties of category with those of protocol (*P) + MatchOneProtocolPropertiesInClass(CatDecl, *P); + + // Go thru the list of protocols for this category and recursively match + // their properties with those in the category. + for (ObjCCategoryDecl::protocol_iterator P = CatDecl->protocol_begin(), + E = CatDecl->protocol_end(); P != E; ++P) + CompareProperties(CatDecl, *P); + } else { + ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl); + for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(), + E = MD->protocol_end(); P != E; ++P) + MatchOneProtocolPropertiesInClass(CatDecl, *P); + } + return; + } + + if (ObjCInterfaceDecl *MDecl = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) { + for (ObjCInterfaceDecl::all_protocol_iterator + P = MDecl->all_referenced_protocol_begin(), + E = MDecl->all_referenced_protocol_end(); P != E; ++P) + // Match properties of class IDecl with those of protocol (*P). + MatchOneProtocolPropertiesInClass(IDecl, *P); + + // Go thru the list of protocols for this class and recursively match + // their properties with those declared in the class. + for (ObjCInterfaceDecl::all_protocol_iterator + P = IDecl->all_referenced_protocol_begin(), + E = IDecl->all_referenced_protocol_end(); P != E; ++P) + CompareProperties(IDecl, *P); + } else { + ObjCProtocolDecl *MD = cast<ObjCProtocolDecl>(ClassDecl); + for (ObjCProtocolDecl::protocol_iterator P = MD->protocol_begin(), + E = MD->protocol_end(); P != E; ++P) + MatchOneProtocolPropertiesInClass(IDecl, *P); + } +} + +/// 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 = IDecl->getImplementation()) + if (ImpDecl->getInstanceMethod(PDecl->getSetterName())) + return false; + // If all fails, look at the super class. + if (ObjCInterfaceDecl *SIDecl = IDecl->getSuperClass()) + return isPropertyReadonly(PDecl, SIDecl); + return true; +} + +/// CollectImmediateProperties - This routine collects all properties in +/// the class and its conforming protocols; but not those it its super class. +void Sema::CollectImmediateProperties(ObjCContainerDecl *CDecl, + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap) { + if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) { + for (ObjCContainerDecl::prop_iterator P = IDecl->prop_begin(), + E = IDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + PropMap[Prop->getIdentifier()] = Prop; + } + // scan through class's protocols. + for (ObjCInterfaceDecl::all_protocol_iterator + PI = IDecl->all_referenced_protocol_begin(), + E = IDecl->all_referenced_protocol_end(); PI != E; ++PI) + CollectImmediateProperties((*PI), PropMap, SuperPropMap); + } + if (ObjCCategoryDecl *CATDecl = dyn_cast<ObjCCategoryDecl>(CDecl)) { + if (!CATDecl->IsClassExtension()) + for (ObjCContainerDecl::prop_iterator P = CATDecl->prop_begin(), + E = CATDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + PropMap[Prop->getIdentifier()] = Prop; + } + // scan through class's protocols. + for (ObjCCategoryDecl::protocol_iterator PI = CATDecl->protocol_begin(), + E = CATDecl->protocol_end(); PI != E; ++PI) + CollectImmediateProperties((*PI), PropMap, SuperPropMap); + } + else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) { + for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(), + E = PDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + ObjCPropertyDecl *PropertyFromSuper = SuperPropMap[Prop->getIdentifier()]; + // Exclude property for protocols which conform to class's super-class, + // as super-class has to implement the property. + if (!PropertyFromSuper || + PropertyFromSuper->getIdentifier() != Prop->getIdentifier()) { + ObjCPropertyDecl *&PropEntry = PropMap[Prop->getIdentifier()]; + if (!PropEntry) + PropEntry = Prop; + } + } + // scan through protocol's protocols. + for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(), + E = PDecl->protocol_end(); PI != E; ++PI) + CollectImmediateProperties((*PI), PropMap, SuperPropMap); + } +} + +/// CollectClassPropertyImplementations - This routine collects list of +/// properties to be implemented in the class. This includes, class's +/// and its conforming protocols' properties. +static void CollectClassPropertyImplementations(ObjCContainerDecl *CDecl, + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap) { + if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) { + for (ObjCContainerDecl::prop_iterator P = IDecl->prop_begin(), + E = IDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + PropMap[Prop->getIdentifier()] = Prop; + } + for (ObjCInterfaceDecl::all_protocol_iterator + PI = IDecl->all_referenced_protocol_begin(), + E = IDecl->all_referenced_protocol_end(); PI != E; ++PI) + CollectClassPropertyImplementations((*PI), PropMap); + } + else if (ObjCProtocolDecl *PDecl = dyn_cast<ObjCProtocolDecl>(CDecl)) { + for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(), + E = PDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + if (!PropMap.count(Prop->getIdentifier())) + PropMap[Prop->getIdentifier()] = Prop; + } + // scan through protocol's protocols. + for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(), + E = PDecl->protocol_end(); PI != E; ++PI) + CollectClassPropertyImplementations((*PI), PropMap); + } +} + +/// CollectSuperClassPropertyImplementations - This routine collects list of +/// properties to be implemented in super class(s) and also coming from their +/// conforming protocols. +static void CollectSuperClassPropertyImplementations(ObjCInterfaceDecl *CDecl, + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap) { + if (ObjCInterfaceDecl *SDecl = CDecl->getSuperClass()) { + while (SDecl) { + CollectClassPropertyImplementations(SDecl, PropMap); + SDecl = SDecl->getSuperClass(); + } + } +} + +/// LookupPropertyDecl - Looks up a property in the current class and all +/// its protocols. +ObjCPropertyDecl *Sema::LookupPropertyDecl(const ObjCContainerDecl *CDecl, + IdentifierInfo *II) { + if (const ObjCInterfaceDecl *IDecl = + dyn_cast<ObjCInterfaceDecl>(CDecl)) { + for (ObjCContainerDecl::prop_iterator P = IDecl->prop_begin(), + E = IDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + if (Prop->getIdentifier() == II) + return Prop; + } + // scan through class's protocols. + for (ObjCInterfaceDecl::all_protocol_iterator + PI = IDecl->all_referenced_protocol_begin(), + E = IDecl->all_referenced_protocol_end(); PI != E; ++PI) { + ObjCPropertyDecl *Prop = LookupPropertyDecl((*PI), II); + if (Prop) + return Prop; + } + } + else if (const ObjCProtocolDecl *PDecl = + dyn_cast<ObjCProtocolDecl>(CDecl)) { + for (ObjCProtocolDecl::prop_iterator P = PDecl->prop_begin(), + E = PDecl->prop_end(); P != E; ++P) { + ObjCPropertyDecl *Prop = (*P); + if (Prop->getIdentifier() == II) + return Prop; + } + // scan through protocol's protocols. + for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(), + E = PDecl->protocol_end(); PI != E; ++PI) { + ObjCPropertyDecl *Prop = LookupPropertyDecl((*PI), II); + if (Prop) + return Prop; + } + } + return 0; +} + +static IdentifierInfo * getDefaultSynthIvarName(ObjCPropertyDecl *Prop, + ASTContext &Ctx) { + SmallString<128> ivarName; + { + llvm::raw_svector_ostream os(ivarName); + os << '_' << Prop->getIdentifier()->getName(); + } + return &Ctx.Idents.get(ivarName.str()); +} + +/// DefaultSynthesizeProperties - This routine default synthesizes all +/// properties which must be synthesized in class's @implementation. +void Sema::DefaultSynthesizeProperties(Scope *S, ObjCImplDecl* IMPDecl, + ObjCInterfaceDecl *IDecl) { + + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> PropMap; + CollectClassPropertyImplementations(IDecl, PropMap); + if (PropMap.empty()) + return; + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> SuperPropMap; + CollectSuperClassPropertyImplementations(IDecl, SuperPropMap); + + for (llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>::iterator + P = PropMap.begin(), E = PropMap.end(); P != E; ++P) { + ObjCPropertyDecl *Prop = P->second; + // If property to be implemented in the super class, ignore. + if (SuperPropMap[Prop->getIdentifier()]) + continue; + // Is there a matching propery synthesize/dynamic? + if (Prop->isInvalidDecl() || + Prop->getPropertyImplementation() == ObjCPropertyDecl::Optional || + IMPDecl->FindPropertyImplIvarDecl(Prop->getIdentifier())) + continue; + // Property may have been synthesized by user. + if (IMPDecl->FindPropertyImplDecl(Prop->getIdentifier())) + continue; + if (IMPDecl->getInstanceMethod(Prop->getGetterName())) { + if (Prop->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_readonly) + continue; + if (IMPDecl->getInstanceMethod(Prop->getSetterName())) + continue; + } + if (isa<ObjCProtocolDecl>(Prop->getDeclContext())) { + // We won't auto-synthesize properties declared in protocols. + Diag(IMPDecl->getLocation(), + diag::warn_auto_synthesizing_protocol_property); + Diag(Prop->getLocation(), diag::note_property_declare); + continue; + } + + // We use invalid SourceLocations for the synthesized ivars since they + // aren't really synthesized at a particular location; they just exist. + // Saying that they are located at the @implementation isn't really going + // to help users. + ActOnPropertyImplDecl(S, SourceLocation(), SourceLocation(), + true, + /* property = */ Prop->getIdentifier(), + /* ivar = */ getDefaultSynthIvarName(Prop, Context), + SourceLocation()); + } +} + +void Sema::DefaultSynthesizeProperties(Scope *S, Decl *D) { + if (!LangOpts.ObjCDefaultSynthProperties || !LangOpts.ObjCNonFragileABI2) + return; + ObjCImplementationDecl *IC=dyn_cast_or_null<ObjCImplementationDecl>(D); + if (!IC) + return; + if (ObjCInterfaceDecl* IDecl = IC->getClassInterface()) + if (!IDecl->isObjCRequiresPropertyDefs()) + DefaultSynthesizeProperties(S, IC, IDecl); +} + +void Sema::DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, + ObjCContainerDecl *CDecl, + const llvm::DenseSet<Selector>& InsMap) { + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> SuperPropMap; + if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl)) + CollectSuperClassPropertyImplementations(IDecl, SuperPropMap); + + llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*> PropMap; + CollectImmediateProperties(CDecl, PropMap, SuperPropMap); + if (PropMap.empty()) + return; + + llvm::DenseSet<ObjCPropertyDecl *> PropImplMap; + for (ObjCImplDecl::propimpl_iterator + I = IMPDecl->propimpl_begin(), + EI = IMPDecl->propimpl_end(); I != EI; ++I) + PropImplMap.insert((*I)->getPropertyDecl()); + + for (llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>::iterator + P = PropMap.begin(), E = PropMap.end(); P != E; ++P) { + ObjCPropertyDecl *Prop = P->second; + // Is there a matching propery synthesize/dynamic? + if (Prop->isInvalidDecl() || + Prop->getPropertyImplementation() == ObjCPropertyDecl::Optional || + PropImplMap.count(Prop) || Prop->hasAttr<UnavailableAttr>()) + continue; + if (!InsMap.count(Prop->getGetterName())) { + Diag(IMPDecl->getLocation(), + isa<ObjCCategoryDecl>(CDecl) ? + diag::warn_setter_getter_impl_required_in_category : + diag::warn_setter_getter_impl_required) + << Prop->getDeclName() << Prop->getGetterName(); + Diag(Prop->getLocation(), + diag::note_property_declare); + if (LangOpts.ObjCDefaultSynthProperties && LangOpts.ObjCNonFragileABI2) + if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl)) + if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs()) + Diag(RID->getLocation(), diag::note_suppressed_class_declare); + + } + + if (!Prop->isReadOnly() && !InsMap.count(Prop->getSetterName())) { + Diag(IMPDecl->getLocation(), + isa<ObjCCategoryDecl>(CDecl) ? + diag::warn_setter_getter_impl_required_in_category : + diag::warn_setter_getter_impl_required) + << Prop->getDeclName() << Prop->getSetterName(); + Diag(Prop->getLocation(), + diag::note_property_declare); + if (LangOpts.ObjCDefaultSynthProperties && LangOpts.ObjCNonFragileABI2) + if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CDecl)) + if (const ObjCInterfaceDecl *RID = ID->isObjCRequiresPropertyDefs()) + Diag(RID->getLocation(), diag::note_suppressed_class_declare); + } + } +} + +void +Sema::AtomicPropertySetterGetterRules (ObjCImplDecl* IMPDecl, + ObjCContainerDecl* IDecl) { + // Rules apply in non-GC mode only + if (getLangOpts().getGC() != LangOptions::NonGC) + return; + for (ObjCContainerDecl::prop_iterator I = IDecl->prop_begin(), + E = IDecl->prop_end(); + I != E; ++I) { + ObjCPropertyDecl *Property = (*I); + ObjCMethodDecl *GetterMethod = 0; + ObjCMethodDecl *SetterMethod = 0; + bool LookedUpGetterSetter = false; + + unsigned Attributes = Property->getPropertyAttributes(); + unsigned AttributesAsWritten = Property->getPropertyAttributesAsWritten(); + + if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic) && + !(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_nonatomic)) { + GetterMethod = IMPDecl->getInstanceMethod(Property->getGetterName()); + SetterMethod = IMPDecl->getInstanceMethod(Property->getSetterName()); + LookedUpGetterSetter = true; + if (GetterMethod) { + Diag(GetterMethod->getLocation(), + diag::warn_default_atomic_custom_getter_setter) + << Property->getIdentifier() << 0; + Diag(Property->getLocation(), diag::note_property_declare); + } + if (SetterMethod) { + Diag(SetterMethod->getLocation(), + diag::warn_default_atomic_custom_getter_setter) + << Property->getIdentifier() << 1; + Diag(Property->getLocation(), diag::note_property_declare); + } + } + + // We only care about readwrite atomic property. + if ((Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) || + !(Attributes & ObjCPropertyDecl::OBJC_PR_readwrite)) + continue; + if (const ObjCPropertyImplDecl *PIDecl + = IMPDecl->FindPropertyImplDecl(Property->getIdentifier())) { + if (PIDecl->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic) + continue; + if (!LookedUpGetterSetter) { + GetterMethod = IMPDecl->getInstanceMethod(Property->getGetterName()); + SetterMethod = IMPDecl->getInstanceMethod(Property->getSetterName()); + LookedUpGetterSetter = true; + } + if ((GetterMethod && !SetterMethod) || (!GetterMethod && SetterMethod)) { + SourceLocation MethodLoc = + (GetterMethod ? GetterMethod->getLocation() + : SetterMethod->getLocation()); + Diag(MethodLoc, diag::warn_atomic_property_rule) + << Property->getIdentifier() << (GetterMethod != 0) + << (SetterMethod != 0); + // fixit stuff. + if (!AttributesAsWritten) { + if (Property->getLParenLoc().isValid()) { + // @property () ... case. + SourceRange PropSourceRange(Property->getAtLoc(), + Property->getLParenLoc()); + Diag(Property->getLocation(), diag::note_atomic_property_fixup_suggest) << + FixItHint::CreateReplacement(PropSourceRange, "@property (nonatomic"); + } + else { + //@property id etc. + SourceLocation endLoc = + Property->getTypeSourceInfo()->getTypeLoc().getBeginLoc(); + endLoc = endLoc.getLocWithOffset(-1); + SourceRange PropSourceRange(Property->getAtLoc(), endLoc); + Diag(Property->getLocation(), diag::note_atomic_property_fixup_suggest) << + FixItHint::CreateReplacement(PropSourceRange, "@property (nonatomic) "); + } + } + else if (!(AttributesAsWritten & ObjCPropertyDecl::OBJC_PR_atomic)) { + // @property () ... case. + SourceLocation endLoc = Property->getLParenLoc(); + SourceRange PropSourceRange(Property->getAtLoc(), endLoc); + Diag(Property->getLocation(), diag::note_atomic_property_fixup_suggest) << + FixItHint::CreateReplacement(PropSourceRange, "@property (nonatomic, "); + } + else + Diag(MethodLoc, diag::note_atomic_property_fixup_suggest); + Diag(Property->getLocation(), diag::note_property_declare); + } + } + } +} + +void Sema::DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D) { + if (getLangOpts().getGC() == LangOptions::GCOnly) + return; + + for (ObjCImplementationDecl::propimpl_iterator + i = D->propimpl_begin(), e = D->propimpl_end(); i != e; ++i) { + ObjCPropertyImplDecl *PID = *i; + if (PID->getPropertyImplementation() != ObjCPropertyImplDecl::Synthesize) + continue; + + const ObjCPropertyDecl *PD = PID->getPropertyDecl(); + if (PD && !PD->hasAttr<NSReturnsNotRetainedAttr>() && + !D->getInstanceMethod(PD->getGetterName())) { + ObjCMethodDecl *method = PD->getGetterMethodDecl(); + if (!method) + continue; + ObjCMethodFamily family = method->getMethodFamily(); + if (family == OMF_alloc || family == OMF_copy || + family == OMF_mutableCopy || family == OMF_new) { + if (getLangOpts().ObjCAutoRefCount) + Diag(PID->getLocation(), diag::err_ownin_getter_rule); + else + Diag(PID->getLocation(), diag::warn_owning_getter_rule); + Diag(PD->getLocation(), diag::note_property_declare); + } + } + } +} + +/// AddPropertyAttrs - Propagates attributes from a property to the +/// implicitly-declared getter or setter for that property. +static void AddPropertyAttrs(Sema &S, ObjCMethodDecl *PropertyMethod, + ObjCPropertyDecl *Property) { + // Should we just clone all attributes over? + for (Decl::attr_iterator A = Property->attr_begin(), + AEnd = Property->attr_end(); + A != AEnd; ++A) { + if (isa<DeprecatedAttr>(*A) || + isa<UnavailableAttr>(*A) || + isa<AvailabilityAttr>(*A)) + PropertyMethod->addAttr((*A)->clone(S.Context)); + } +} + +/// 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, + ObjCPropertyDecl *redeclaredProperty, + ObjCContainerDecl *lexicalDC) { + + ObjCMethodDecl *GetterMethod, *SetterMethod; + + GetterMethod = CD->getInstanceMethod(property->getGetterName()); + SetterMethod = CD->getInstanceMethod(property->getSetterName()); + DiagnosePropertyAccessorMismatch(property, GetterMethod, + property->getLocation()); + + if (SetterMethod) { + ObjCPropertyDecl::PropertyAttributeKind CAttr = + property->getPropertyAttributes(); + if ((!(CAttr & ObjCPropertyDecl::OBJC_PR_readonly)) && + Context.getCanonicalType(SetterMethod->getResultType()) != + Context.VoidTy) + Diag(SetterMethod->getLocation(), diag::err_setter_type_void); + if (SetterMethod->param_size() != 1 || + !Context.hasSameUnqualifiedType( + (*SetterMethod->param_begin())->getType().getNonReferenceType(), + property->getType().getNonReferenceType())) { + Diag(property->getLocation(), + diag::warn_accessor_property_type_mismatch) + << property->getDeclName() + << SetterMethod->getSelector(); + 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. + SourceLocation Loc = redeclaredProperty ? + redeclaredProperty->getLocation() : + property->getLocation(); + + GetterMethod = ObjCMethodDecl::Create(Context, Loc, Loc, + property->getGetterName(), + property->getType(), 0, CD, /*isInstance=*/true, + /*isVariadic=*/false, /*isSynthesized=*/true, + /*isImplicitlyDeclared=*/true, /*isDefined=*/false, + (property->getPropertyImplementation() == + ObjCPropertyDecl::Optional) ? + ObjCMethodDecl::Optional : + ObjCMethodDecl::Required); + CD->addDecl(GetterMethod); + + AddPropertyAttrs(*this, GetterMethod, property); + + // FIXME: Eventually this shouldn't be needed, as the lexical context + // and the real context should be the same. + if (lexicalDC) + GetterMethod->setLexicalDeclContext(lexicalDC); + if (property->hasAttr<NSReturnsNotRetainedAttr>()) + GetterMethod->addAttr( + ::new (Context) NSReturnsNotRetainedAttr(Loc, Context)); + } else + // A user declared getter will be synthesize when @synthesize of + // the property with the same name is seen in the @implementation + GetterMethod->setSynthesized(true); + 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. + SourceLocation Loc = redeclaredProperty ? + redeclaredProperty->getLocation() : + property->getLocation(); + + SetterMethod = + ObjCMethodDecl::Create(Context, Loc, Loc, + property->getSetterName(), Context.VoidTy, 0, + CD, /*isInstance=*/true, /*isVariadic=*/false, + /*isSynthesized=*/true, + /*isImplicitlyDeclared=*/true, + /*isDefined=*/false, + (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, + Loc, Loc, + property->getIdentifier(), + property->getType().getUnqualifiedType(), + /*TInfo=*/0, + SC_None, + SC_None, + 0); + SetterMethod->setMethodParams(Context, Argument, + ArrayRef<SourceLocation>()); + + AddPropertyAttrs(*this, SetterMethod, property); + + CD->addDecl(SetterMethod); + // FIXME: Eventually this shouldn't be needed, as the lexical context + // and the real context should be the same. + if (lexicalDC) + SetterMethod->setLexicalDeclContext(lexicalDC); + } else + // A user declared setter will be synthesize when @synthesize of + // the property with the same name is seen in the @implementation + SetterMethod->setSynthesized(true); + 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); +} + +void Sema::CheckObjCPropertyAttributes(Decl *PDecl, + SourceLocation Loc, + unsigned &Attributes) { + // FIXME: Improve the reported location. + if (!PDecl || PDecl->isInvalidDecl()) + return; + + ObjCPropertyDecl *PropertyDecl = cast<ObjCPropertyDecl>(PDecl); + QualType PropertyTy = PropertyDecl->getType(); + + if (getLangOpts().ObjCAutoRefCount && + (Attributes & ObjCDeclSpec::DQ_PR_readonly) && + PropertyTy->isObjCRetainableType()) { + // 'readonly' property with no obvious lifetime. + // its life time will be determined by its backing ivar. + unsigned rel = (ObjCDeclSpec::DQ_PR_unsafe_unretained | + ObjCDeclSpec::DQ_PR_copy | + ObjCDeclSpec::DQ_PR_retain | + ObjCDeclSpec::DQ_PR_strong | + ObjCDeclSpec::DQ_PR_weak | + ObjCDeclSpec::DQ_PR_assign); + if ((Attributes & rel) == 0) + return; + } + + // 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_unsafe_unretained | + ObjCDeclSpec::DQ_PR_copy | + ObjCDeclSpec::DQ_PR_retain | + ObjCDeclSpec::DQ_PR_strong))) { + const char * which = (Attributes & ObjCDeclSpec::DQ_PR_readwrite) ? + "readwrite" : + (Attributes & ObjCDeclSpec::DQ_PR_assign) ? + "assign" : + (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) ? + "unsafe_unretained" : + (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_weak | ObjCDeclSpec::DQ_PR_copy | + ObjCDeclSpec::DQ_PR_retain | ObjCDeclSpec::DQ_PR_strong)) && + !PropertyTy->isObjCRetainableType() && + !PropertyDecl->getAttr<ObjCNSObjectAttr>()) { + Diag(Loc, diag::err_objc_property_requires_object) + << (Attributes & ObjCDeclSpec::DQ_PR_weak ? "weak" : + Attributes & ObjCDeclSpec::DQ_PR_copy ? "copy" : "retain (or strong)"); + Attributes &= ~(ObjCDeclSpec::DQ_PR_weak | ObjCDeclSpec::DQ_PR_copy | + ObjCDeclSpec::DQ_PR_retain | ObjCDeclSpec::DQ_PR_strong); + PropertyDecl->setInvalidDecl(); + } + + // 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; + } + if (Attributes & ObjCDeclSpec::DQ_PR_strong) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "assign" << "strong"; + Attributes &= ~ObjCDeclSpec::DQ_PR_strong; + } + if (getLangOpts().ObjCAutoRefCount && + (Attributes & ObjCDeclSpec::DQ_PR_weak)) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "assign" << "weak"; + Attributes &= ~ObjCDeclSpec::DQ_PR_weak; + } + } else if (Attributes & ObjCDeclSpec::DQ_PR_unsafe_unretained) { + if (Attributes & ObjCDeclSpec::DQ_PR_copy) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "unsafe_unretained" << "copy"; + Attributes &= ~ObjCDeclSpec::DQ_PR_copy; + } + if (Attributes & ObjCDeclSpec::DQ_PR_retain) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "unsafe_unretained" << "retain"; + Attributes &= ~ObjCDeclSpec::DQ_PR_retain; + } + if (Attributes & ObjCDeclSpec::DQ_PR_strong) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "unsafe_unretained" << "strong"; + Attributes &= ~ObjCDeclSpec::DQ_PR_strong; + } + if (getLangOpts().ObjCAutoRefCount && + (Attributes & ObjCDeclSpec::DQ_PR_weak)) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "unsafe_unretained" << "weak"; + Attributes &= ~ObjCDeclSpec::DQ_PR_weak; + } + } 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; + } + if (Attributes & ObjCDeclSpec::DQ_PR_strong) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "copy" << "strong"; + Attributes &= ~ObjCDeclSpec::DQ_PR_strong; + } + if (Attributes & ObjCDeclSpec::DQ_PR_weak) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "copy" << "weak"; + Attributes &= ~ObjCDeclSpec::DQ_PR_weak; + } + } + else if ((Attributes & ObjCDeclSpec::DQ_PR_retain) && + (Attributes & ObjCDeclSpec::DQ_PR_weak)) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "retain" << "weak"; + Attributes &= ~ObjCDeclSpec::DQ_PR_retain; + } + else if ((Attributes & ObjCDeclSpec::DQ_PR_strong) && + (Attributes & ObjCDeclSpec::DQ_PR_weak)) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "strong" << "weak"; + Attributes &= ~ObjCDeclSpec::DQ_PR_weak; + } + + if ((Attributes & ObjCDeclSpec::DQ_PR_atomic) && + (Attributes & ObjCDeclSpec::DQ_PR_nonatomic)) { + Diag(Loc, diag::err_objc_property_attr_mutually_exclusive) + << "atomic" << "nonatomic"; + Attributes &= ~ObjCDeclSpec::DQ_PR_atomic; + } + + // 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_unsafe_unretained | + ObjCDeclSpec::DQ_PR_retain | ObjCDeclSpec::DQ_PR_strong | + ObjCDeclSpec::DQ_PR_weak)) && + PropertyTy->isObjCObjectPointerType()) { + if (getLangOpts().ObjCAutoRefCount) + // With arc, @property definitions should default to (strong) when + // not specified; including when property is 'readonly'. + PropertyDecl->setPropertyAttributes(ObjCPropertyDecl::OBJC_PR_strong); + else if (!(Attributes & ObjCDeclSpec::DQ_PR_readonly)) { + bool isAnyClassTy = + (PropertyTy->isObjCClassType() || + PropertyTy->isObjCQualifiedClassType()); + // In non-gc, non-arc mode, 'Class' is treated as a 'void *' no need to + // issue any warning. + if (isAnyClassTy && getLangOpts().getGC() == LangOptions::NonGC) + ; + else { + // Skip this warning in gc-only mode. + if (getLangOpts().getGC() != LangOptions::GCOnly) + Diag(Loc, diag::warn_objc_property_no_assignment_attribute); + + // If non-gc code warn that this is likely inappropriate. + if (getLangOpts().getGC() == 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). + } + + if (!(Attributes & ObjCDeclSpec::DQ_PR_copy) + &&!(Attributes & ObjCDeclSpec::DQ_PR_readonly) + && getLangOpts().getGC() == LangOptions::GCOnly + && PropertyTy->isBlockPointerType()) + Diag(Loc, diag::warn_objc_property_copy_missing_on_block); + else if (getLangOpts().ObjCAutoRefCount && + (Attributes & ObjCDeclSpec::DQ_PR_retain) && + !(Attributes & ObjCDeclSpec::DQ_PR_readonly) && + !(Attributes & ObjCDeclSpec::DQ_PR_strong) && + PropertyTy->isBlockPointerType()) + Diag(Loc, diag::warn_objc_property_retain_of_block); + + if ((Attributes & ObjCDeclSpec::DQ_PR_readonly) && + (Attributes & ObjCDeclSpec::DQ_PR_setter)) + Diag(Loc, diag::warn_objc_readonly_property_has_setter); + +} |