SemaDeclObjC.cpp File Reference

#include "TypeLocBuilder.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/ASTMutationListener.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprObjC.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Sema/DeclSpec.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Scope.h"
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/SemaInternal.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "clang/AST/DeclNodes.inc"

Go to the source code of this file.

Macros
#define	OBJCCONTAINER(type, base)
#define	ABSTRACT_DECL(expansion)
#define	DECL(type, base)    case Decl::type:

Typedefs
typedef llvm::DenseSet< IdentifierInfo * >	ProtocolNameSet
	FIXME: Type hierarchies in Objective-C can be deep.
typedef std::unique_ptr< ProtocolNameSet >	LazyProtocolNameSet

Functions
static bool	diagnoseNoescape (const ParmVarDecl *NewD, const ParmVarDecl *OldD, Sema &S)
	Issue a warning if the parameter of the overridden method is non-escaping but the parameter of the overriding method is not.
static void	diagnoseNoescape (const ParmVarDecl *NewD, const ParmVarDecl *OldD, const ObjCCategoryDecl *CD, const ObjCProtocolDecl *PD, Sema &S)
	Produce additional diagnostics if a category conforms to a protocol that defines a method taking a non-escaping parameter.
static void	DiagnoseObjCImplementedDeprecations (Sema &S, const NamedDecl *ND, SourceLocation ImplLoc)
static bool	HasExplicitOwnershipAttr (Sema &S, ParmVarDecl *Param)
	HasExplicitOwnershipAttr - returns true when pointer to ObjC pointer has explicit ownership attribute; false otherwise.
static void	diagnoseUseOfProtocols (Sema &TheSema, ObjCContainerDecl *CD, ObjCProtocolDecl *const *ProtoRefs, unsigned NumProtoRefs, const SourceLocation *ProtoLocs)
static bool	checkTypeParamListConsistency (Sema &S, ObjCTypeParamList *prevTypeParams, ObjCTypeParamList *newTypeParams, TypeParamListContext newContext)
	Check consistency between two Objective-C type parameter lists, e.g., between a category/extension and an @interface or between an @class and an @interface.
static bool	NestedProtocolHasNoDefinition (ObjCProtocolDecl *PDecl, ObjCProtocolDecl *&UndefinedProtocol)
static bool	shouldWarnUndefinedMethod (const ObjCMethodDecl *M)
static void	WarnUndefinedMethod (Sema &S, ObjCImplDecl *Impl, ObjCMethodDecl *method, bool &IncompleteImpl, unsigned DiagID, NamedDecl *NeededFor=nullptr)
static bool	isObjCTypeSubstitutable (ASTContext &Context, const ObjCObjectPointerType *A, const ObjCObjectPointerType *B, bool rejectId)
	Determines if type B can be substituted for type A.
static SourceRange	getTypeRange (TypeSourceInfo *TSI)
static bool	objcModifiersConflict (Decl::ObjCDeclQualifier x, Decl::ObjCDeclQualifier y)
	Determine whether two set of Objective-C declaration qualifiers conflict.
static bool	CheckMethodOverrideReturn (Sema &S, ObjCMethodDecl *MethodImpl, ObjCMethodDecl *MethodDecl, bool IsProtocolMethodDecl, bool IsOverridingMode, bool Warn)
static bool	CheckMethodOverrideParam (Sema &S, ObjCMethodDecl *MethodImpl, ObjCMethodDecl *MethodDecl, ParmVarDecl *ImplVar, ParmVarDecl *IfaceVar, bool IsProtocolMethodDecl, bool IsOverridingMode, bool Warn)
static bool	checkMethodFamilyMismatch (Sema &S, ObjCMethodDecl *impl, ObjCMethodDecl *decl)
	In ARC, check whether the conventional meanings of the two methods match.
static void	findProtocolsWithExplicitImpls (const ObjCProtocolDecl *PDecl, ProtocolNameSet &PNS)
static void	findProtocolsWithExplicitImpls (const ObjCInterfaceDecl *Super, ProtocolNameSet &PNS)
	Recursively populates a set with all conformed protocols in a class hierarchy that have the 'objc_protocol_requires_explicit_implementation' attribute.
static void	CheckProtocolMethodDefs (Sema &S, ObjCImplDecl *Impl, ObjCProtocolDecl *PDecl, bool &IncompleteImpl, const Sema::SelectorSet &InsMap, const Sema::SelectorSet &ClsMap, ObjCContainerDecl *CDecl, LazyProtocolNameSet &ProtocolsExplictImpl)
	CheckProtocolMethodDefs - This routine checks unimplemented methods Declared in protocol, and those referenced by it.
static bool	tryMatchRecordTypes (ASTContext &Context, Sema::MethodMatchStrategy strategy, const Type *left, const Type *right)
static bool	matchTypes (ASTContext &Context, Sema::MethodMatchStrategy strategy, QualType leftQT, QualType rightQT)
static bool	isMethodContextSameForKindofLookup (ObjCMethodDecl *Method, ObjCMethodDecl *MethodInList)
static bool	isAcceptableMethodMismatch (ObjCMethodDecl *chosen, ObjCMethodDecl *other)
	Determines if this is an "acceptable" loose mismatch in the global method pool.
static bool	FilterMethodsByTypeBound (ObjCMethodDecl *Method, const ObjCObjectType *TypeBound)
	Return true if the given method is wthin the type bound.
static void	HelperSelectorsForTypoCorrection (SmallVectorImpl< const ObjCMethodDecl * > &BestMethod, StringRef Typo, const ObjCMethodDecl *Method)
static bool	HelperIsMethodInObjCType (Sema &S, Selector Sel, QualType ObjectType)
static void	DiagnoseWeakIvars (Sema &S, ObjCImplementationDecl *ID)
	Diagnose attempts to define ARC-__weak ivars when __weak is disabled.
static void	DiagnoseRetainableFlexibleArrayMember (Sema &S, ObjCInterfaceDecl *ID)
	Diagnose attempts to use flexible array member with retainable object type.
static bool	IsVariableSizedType (QualType T)
static void	DiagnoseVariableSizedIvars (Sema &S, ObjCContainerDecl *OCD)
static void	DiagnoseCategoryDirectMembersProtocolConformance (Sema &S, ObjCProtocolDecl *PDecl, ObjCCategoryDecl *CDecl)
static void	DiagnoseCategoryDirectMembersProtocolConformance (Sema &S, ObjCCategoryDecl *CDecl, const llvm::iterator_range< ObjCProtocolList::iterator > &Protocols)
static Decl::ObjCDeclQualifier	CvtQTToAstBitMask (ObjCDeclSpec::ObjCDeclQualifier PQTVal)
	CvtQTToAstBitMask - utility routine to produce an AST bitmask for objective-c's type qualifier from the parser version of the same info.
static Sema::ResultTypeCompatibilityKind	CheckRelatedResultTypeCompatibility (Sema &S, ObjCMethodDecl *Method, ObjCInterfaceDecl *CurrentClass)
	Check whether the declared result type of the given Objective-C method declaration is compatible with the method's class.
static QualType	mergeTypeNullabilityForRedecl (Sema &S, SourceLocation loc, QualType type, bool usesCSKeyword, SourceLocation prevLoc, QualType prevType, bool prevUsesCSKeyword)
	Merge type nullability from for a redeclaration of the same entity, producing the updated type of the redeclared entity.
static void	mergeInterfaceMethodToImpl (Sema &S, ObjCMethodDecl *method, ObjCMethodDecl *prevMethod)
	Merge information from the declaration of a method in the @interface (or a category/extension) into the corresponding method in the @implementation (for a class or category).
static void	checkObjCMethodX86VectorTypes (Sema &SemaRef, const ObjCMethodDecl *Method)
	Verify that the method parameters/return value have types that are supported by the x86 target.
static void	mergeObjCDirectMembers (Sema &S, Decl *CD, ObjCMethodDecl *Method)
static void	checkObjCDirectMethodClashes (Sema &S, ObjCInterfaceDecl *IDecl, ObjCMethodDecl *Method, ObjCImplDecl *ImpDecl=nullptr)

Macro Definition Documentation

ABSTRACT_DECL

#define ABSTRACT_DECL

(

expansion

)

DECL

#define DECL	(		type,
			base
	)		case Decl::type:

OBJCCONTAINER

#define OBJCCONTAINER	(		type,
			base
	)

Value:

    case Decl::type: \
      searchFrom(cast<type##Decl>(container)); \
      break;

Typedef Documentation

LazyProtocolNameSet

typedef std::unique_ptr<ProtocolNameSet> LazyProtocolNameSet

Definition at line 2684 of file SemaDeclObjC.cpp.

ProtocolNameSet

typedef llvm::DenseSet<IdentifierInfo*> ProtocolNameSet

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.

Definition at line 2683 of file SemaDeclObjC.cpp.

Function Documentation

checkMethodFamilyMismatch()

static bool checkMethodFamilyMismatch ( Sema &  S, ObjCMethodDecl *  impl, ObjCMethodDecl *  decl  )

static

In ARC, check whether the conventional meanings of the two methods match.

If they don't, it's a hard error.

Definition at line 2514 of file SemaDeclObjC.cpp.

References clang::ast_matchers::decl, clang::SemaBase::Diag(), clang::Decl::getLocation(), clang::ObjCMethodDecl::getMethodFamily(), clang::ObjCMethodDecl::getReturnType(), int, clang::Decl::isInvalidDecl(), clang::Type::isObjCObjectPointerType(), clang::OMF_alloc, clang::OMF_autorelease, clang::OMF_copy, clang::OMF_dealloc, clang::OMF_finalize, clang::OMF_init, clang::OMF_initialize, clang::OMF_mutableCopy, clang::OMF_new, clang::OMF_None, clang::OMF_performSelector, clang::OMF_release, clang::OMF_retain, clang::OMF_retainCount, and clang::OMF_self.

Referenced by clang::Sema::WarnConflictingTypedMethods().

CheckMethodOverrideParam()

static bool CheckMethodOverrideParam ( Sema &  S, ObjCMethodDecl *  MethodImpl, ObjCMethodDecl *  MethodDecl, ParmVarDecl *  ImplVar, ParmVarDecl *  IfaceVar, bool  IsProtocolMethodDecl, bool  IsOverridingMode, bool  Warn  )

static

Definition at line 2431 of file SemaDeclObjC.cpp.

References clang::Sema::Context, clang::SemaBase::Diag(), clang::Type::getAs(), clang::Decl::getDeclContext(), clang::NamedDecl::getDeclName(), clang::Decl::getLocation(), clang::Type::getNullability(), clang::ParmVarDecl::getObjCDeclQualifier(), clang::ValueDecl::getType(), getTypeRange(), clang::DeclaratorDecl::getTypeSourceInfo(), clang::ASTContext::hasSameNullabilityTypeQualifier(), clang::ASTContext::hasSameUnqualifiedType(), isObjCTypeSubstitutable(), clang::Decl::OBJC_TQ_CSNullability, and objcModifiersConflict().

Referenced by clang::Sema::CheckConflictingOverridingMethod(), clang::Sema::WarnConflictingTypedMethods(), and clang::Sema::WarnExactTypedMethods().

CheckMethodOverrideReturn()

static bool CheckMethodOverrideReturn ( Sema &  S, ObjCMethodDecl *  MethodImpl, ObjCMethodDecl *  MethodDecl, bool  IsProtocolMethodDecl, bool  IsOverridingMode, bool  Warn  )

static

Definition at line 2351 of file SemaDeclObjC.cpp.

References clang::Sema::Context, clang::SemaBase::Diag(), clang::Type::getAs(), clang::Decl::getDeclContext(), clang::NamedDecl::getDeclName(), clang::Decl::getLocation(), clang::Type::getNullability(), clang::ObjCMethodDecl::getObjCDeclQualifier(), clang::ObjCMethodDecl::getReturnType(), clang::ObjCMethodDecl::getReturnTypeSourceRange(), clang::ASTContext::hasSameNullabilityTypeQualifier(), clang::ASTContext::hasSameUnqualifiedType(), isObjCTypeSubstitutable(), clang::Decl::OBJC_TQ_CSNullability, and objcModifiersConflict().

Referenced by clang::Sema::CheckConflictingOverridingMethod(), clang::Sema::WarnConflictingTypedMethods(), and clang::Sema::WarnExactTypedMethods().

checkObjCDirectMethodClashes()

static void checkObjCDirectMethodClashes ( Sema &  S, ObjCInterfaceDecl *  IDecl, ObjCMethodDecl *  Method, ObjCImplDecl *  ImpDecl = nullptr  )

static

Definition at line 4678 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), clang::NamedDecl::getDeclName(), clang::ObjCInterfaceDecl::getImplementation(), clang::Decl::getLocation(), clang::ObjCContainerDecl::getMethod(), clang::ObjCMethodDecl::getSelector(), clang::ObjCMethodDecl::isDirectMethod(), clang::ObjCMethodDecl::isInstanceMethod(), and clang::ObjCInterfaceDecl::visible_categories().

Referenced by clang::Sema::ActOnMethodDeclaration().

checkObjCMethodX86VectorTypes()

static void checkObjCMethodX86VectorTypes ( Sema &  SemaRef, const ObjCMethodDecl *  Method  )

static

Verify that the method parameters/return value have types that are supported by the x86 target.

Definition at line 4629 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), clang::Sema::getASTContext(), clang::SourceRange::getBegin(), clang::TargetInfo::getPlatformMinVersion(), clang::ObjCMethodDecl::getReturnType(), clang::ObjCMethodDecl::getReturnTypeSourceRange(), clang::ASTContext::getTargetInfo(), clang::TargetInfo::getTriple(), clang::SourceLocation::isInvalid(), clang::Type::isVectorType(), P, clang::ObjCMethodDecl::parameters(), and clang::T.

Referenced by clang::Sema::ActOnMethodDeclaration().

CheckProtocolMethodDefs()

static void CheckProtocolMethodDefs ( Sema &  S, ObjCImplDecl *  Impl, ObjCProtocolDecl *  PDecl, bool &  IncompleteImpl, const Sema::SelectorSet &  InsMap, const Sema::SelectorSet &  ClsMap, ObjCContainerDecl *  CDecl, LazyProtocolNameSet &  ProtocolsExplictImpl  )

static

CheckProtocolMethodDefs - This routine checks unimplemented methods Declared in protocol, and those referenced by it.

Definition at line 2710 of file SemaDeclObjC.cpp.

References clang::C, CheckProtocolMethodDefs(), clang::ObjCContainerDecl::class_methods(), clang::Sema::Context, DIAG, clang::Sema::Diags, findProtocolsWithExplicitImpls(), clang::IdentifierTable::get(), clang::ObjCProtocolDecl::getDefinition(), clang::NamedDecl::getIdentifier(), clang::Sema::getLangOpts(), clang::Decl::getLocation(), clang::SelectorTable::getSelector(), clang::ObjCInterfaceDecl::getSuperClass(), clang::Decl::hasAttr(), clang::ASTContext::Idents, clang::ObjCContainerDecl::instance_methods(), clang::DiagnosticsEngine::isIgnored(), clang::ObjCRuntime::isNeXTFamily(), clang::ObjCProtocolDecl::isThisDeclarationADefinition(), clang::ObjCInterfaceDecl::lookupInheritedClass(), clang::ObjCInterfaceDecl::lookupMethod(), clang::LangOptions::ObjCRuntime, clang::Optional, clang::ObjCProtocolDecl::protocols(), clang::ASTContext::Selectors, and WarnUndefinedMethod().

Referenced by CheckProtocolMethodDefs(), and clang::Sema::ImplMethodsVsClassMethods().

CheckRelatedResultTypeCompatibility()

static Sema::ResultTypeCompatibilityKind CheckRelatedResultTypeCompatibility ( Sema &  S, ObjCMethodDecl *  Method, ObjCInterfaceDecl *  CurrentClass  )

static

Check whether the declared result type of the given Objective-C method declaration is compatible with the method's class.

Definition at line 4246 of file SemaDeclObjC.cpp.

References clang::declaresSameEntity(), clang::Type::getAs(), clang::ObjCMethodDecl::getReturnType(), clang::Sema::RTC_Compatible, clang::Sema::RTC_Incompatible, and clang::Sema::RTC_Unknown.

Referenced by clang::Sema::ActOnMethodDeclaration().

checkTypeParamListConsistency()

static bool checkTypeParamListConsistency ( Sema &  S, ObjCTypeParamList *  prevTypeParams, ObjCTypeParamList *  newTypeParams, TypeParamListContext  newContext  )

static

Check consistency between two Objective-C type parameter lists, e.g., between a category/extension and an @interface or between an @class and an @interface.

Definition at line 828 of file SemaDeclObjC.cpp.

References clang::ASTContext::adjustObjCTypeParamBoundType(), clang::ObjCTypeParamList::back(), clang::ObjCTypeParamList::begin(), clang::Sema::Context, clang::Contravariant, clang::Covariant, clang::FixItHint::CreateInsertion(), clang::FixItHint::CreateRemoval(), clang::FixItHint::CreateReplacement(), clang::SemaBase::Diag(), clang::QualType::getAsString(), clang::SourceRange::getBegin(), clang::TypeDecl::getBeginLoc(), clang::Decl::getDeclContext(), clang::NamedDecl::getDeclName(), clang::Decl::getEndLoc(), clang::Decl::getLocation(), clang::Sema::getLocForEndOfToken(), clang::ASTContext::getPrintingPolicy(), clang::TypeLoc::getSourceRange(), clang::TypeSourceInfo::getTypeLoc(), clang::TypedefNameDecl::getTypeSourceInfo(), clang::TypedefNameDecl::getUnderlyingType(), clang::ObjCTypeParamDecl::getVariance(), clang::ObjCTypeParamDecl::getVarianceLoc(), clang::ObjCTypeParamDecl::hasExplicitBound(), clang::ASTContext::hasSameType(), clang::Invariant, clang::SourceLocation::isInvalid(), clang::ObjCTypeParamDecl::setVariance(), and clang::ObjCTypeParamList::size().

Referenced by clang::Sema::ActOnForwardClassDeclaration(), clang::Sema::ActOnStartCategoryInterface(), and clang::Sema::ActOnStartClassInterface().

CvtQTToAstBitMask()

static Decl::ObjCDeclQualifier CvtQTToAstBitMask ( ObjCDeclSpec::ObjCDeclQualifier  PQTVal )

static

CvtQTToAstBitMask - utility routine to produce an AST bitmask for objective-c's type qualifier from the parser version of the same info.

Definition at line 4238 of file SemaDeclObjC.cpp.

Referenced by clang::Sema::ActOnMethodDeclaration().

DiagnoseCategoryDirectMembersProtocolConformance() [1/2]

static void DiagnoseCategoryDirectMembersProtocolConformance ( Sema &  S, ObjCCategoryDecl *  CDecl, const llvm::iterator_range< ObjCProtocolList::iterator > &  Protocols  )

static

Definition at line 3939 of file SemaDeclObjC.cpp.

References DiagnoseCategoryDirectMembersProtocolConformance().

DiagnoseCategoryDirectMembersProtocolConformance() [2/2]

static void DiagnoseCategoryDirectMembersProtocolConformance ( Sema &  S, ObjCProtocolDecl *  PDecl, ObjCCategoryDecl *  CDecl  )

static

Definition at line 3946 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), DiagnoseCategoryDirectMembersProtocolConformance(), clang::ObjCCategoryDecl::getClassInterface(), clang::ObjCProtocolDecl::getDefinition(), clang::Decl::getLocation(), clang::ObjCCategoryDecl::IsClassExtension(), clang::ObjCProtocolDecl::isThisDeclarationADefinition(), clang::ObjCContainerDecl::methods(), clang::OBJC_PR_query_class, clang::OBJC_PR_query_instance, clang::ObjCContainerDecl::properties(), and clang::ObjCProtocolDecl::protocols().

Referenced by clang::Sema::ActOnAtEnd(), and DiagnoseCategoryDirectMembersProtocolConformance().

diagnoseNoescape() [1/2]

static void diagnoseNoescape ( const ParmVarDecl *  NewD, const ParmVarDecl *  OldD, const ObjCCategoryDecl *  CD, const ObjCProtocolDecl *  PD, Sema &  S  )

static

Produce additional diagnostics if a category conforms to a protocol that defines a method taking a non-escaping parameter.

Definition at line 127 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), diagnoseNoescape(), clang::Decl::getDeclContext(), clang::Decl::getLocation(), and clang::ObjCCategoryDecl::IsClassExtension().

diagnoseNoescape() [2/2]

static bool diagnoseNoescape ( const ParmVarDecl *  NewD, const ParmVarDecl *  OldD, Sema &  S  )

static

Issue a warning if the parameter of the overridden method is non-escaping but the parameter of the overriding method is not.

Definition at line 114 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), clang::Decl::getLocation(), and clang::Decl::hasAttr().

Referenced by clang::Sema::ActOnMethodDeclaration(), clang::Sema::CheckObjCMethodOverride(), and diagnoseNoescape().

DiagnoseObjCImplementedDeprecations()

static void DiagnoseObjCImplementedDeprecations ( Sema &  S, const NamedDecl *  ND, SourceLocation  ImplLoc  )

static

Definition at line 282 of file SemaDeclObjC.cpp.

References clang::AR_Deprecated, clang::AR_Unavailable, clang::Sema::Context, clang::SemaBase::Diag(), clang::Decl::getAvailability(), clang::NamedDecl::getDeclName(), clang::Decl::getLocation(), clang::TargetInfo::getPlatformName(), and clang::ASTContext::getTargetInfo().

Referenced by clang::Sema::ActOnStartCategoryImplementation(), clang::Sema::ActOnStartClassImplementation(), and clang::Sema::ActOnStartOfObjCMethodDef().

DiagnoseRetainableFlexibleArrayMember()

static void DiagnoseRetainableFlexibleArrayMember ( Sema &  S, ObjCInterfaceDecl *  ID  )

static

Diagnose attempts to use flexible array member with retainable object type.

Definition at line 3807 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), clang::Sema::getLangOpts(), clang::QualType::getObjCLifetime(), clang::Type::isIncompleteArrayType(), clang::Type::isObjCLifetimeType(), and clang::Qualifiers::OCL_ExplicitNone.

Referenced by clang::Sema::ActOnAtEnd().

diagnoseUseOfProtocols()

static void diagnoseUseOfProtocols ( Sema &  TheSema, ObjCContainerDecl *  CD, ObjCProtocolDecl *const *  ProtoRefs, unsigned  NumProtoRefs, const SourceLocation *  ProtoLocs  )

static

Definition at line 525 of file SemaDeclObjC.cpp.

References clang::Sema::DiagnoseUseOfDecl().

Referenced by clang::Sema::ActOnStartCategoryInterface(), clang::Sema::ActOnStartClassInterface(), and clang::Sema::ActOnStartProtocolInterface().

DiagnoseVariableSizedIvars()

static void DiagnoseVariableSizedIvars ( Sema &  S, ObjCContainerDecl *  OCD  )

static

Definition at line 3853 of file SemaDeclObjC.cpp.

References clang::ObjCInterfaceDecl::all_declared_ivar_begin(), clang::Class, clang::SemaBase::Diag(), clang::Type::getAs(), clang::NamedDecl::getDeclName(), clang::Decl::getLocation(), clang::ObjCIvarDecl::getNextIvar(), clang::ObjCInterfaceDecl::getSuperClass(), clang::ValueDecl::getType(), clang::Type::isIncompleteArrayType(), IsVariableSizedType(), clang::ObjCInterfaceDecl::ivar_begin(), clang::ObjCInterfaceDecl::ivar_empty(), clang::ObjCInterfaceDecl::ivar_size(), and clang::ObjCInterfaceDecl::ivars().

Referenced by clang::Sema::ActOnAtEnd().

DiagnoseWeakIvars()

static void DiagnoseWeakIvars ( Sema &  S, ObjCImplementationDecl *  ID  )

static

Diagnose attempts to define ARC-__weak ivars when __weak is disabled.

Definition at line 3790 of file SemaDeclObjC.cpp.

References clang::SemaBase::Diag(), clang::Sema::getLangOpts(), and clang::Qualifiers::OCL_Weak.

Referenced by clang::Sema::ActOnAtEnd().

FilterMethodsByTypeBound()

static bool FilterMethodsByTypeBound ( ObjCMethodDecl *  Method, const ObjCObjectType *  TypeBound  )

static

Return true if the given method is wthin the type bound.

Definition at line 3483 of file SemaDeclObjC.cpp.

References clang::ObjCMethodDecl::getClassInterface(), clang::Decl::getDeclContext(), clang::ObjCObjectType::getInterface(), and clang::ObjCObjectType::isObjCId().

Referenced by clang::Sema::CollectMultipleMethodsInGlobalPool().

findProtocolsWithExplicitImpls() [1/2]

static void findProtocolsWithExplicitImpls ( const ObjCInterfaceDecl *  Super, ProtocolNameSet &  PNS  )

static

Recursively populates a set with all conformed protocols in a class hierarchy that have the 'objc_protocol_requires_explicit_implementation' attribute.

Definition at line 2697 of file SemaDeclObjC.cpp.

References clang::ObjCInterfaceDecl::all_referenced_protocols(), findProtocolsWithExplicitImpls(), and clang::ObjCInterfaceDecl::getSuperClass().

findProtocolsWithExplicitImpls() [2/2]

static void findProtocolsWithExplicitImpls ( const ObjCProtocolDecl *  PDecl, ProtocolNameSet &  PNS  )

static

Definition at line 2686 of file SemaDeclObjC.cpp.

References findProtocolsWithExplicitImpls(), clang::NamedDecl::getIdentifier(), clang::Decl::hasAttr(), and clang::ObjCProtocolDecl::protocols().

Referenced by CheckProtocolMethodDefs(), and findProtocolsWithExplicitImpls().

getTypeRange()

static SourceRange getTypeRange ( TypeSourceInfo *  TSI )

static

Definition at line 2340 of file SemaDeclObjC.cpp.

References clang::TypeLoc::getSourceRange(), and clang::TypeSourceInfo::getTypeLoc().

Referenced by CheckMethodOverrideParam().

HasExplicitOwnershipAttr()

static bool HasExplicitOwnershipAttr ( Sema &  S, ParmVarDecl *  Param  )

static

HasExplicitOwnershipAttr - returns true when pointer to ObjC pointer has explicit ownership attribute; false otherwise.

Definition at line 344 of file SemaDeclObjC.cpp.

References clang::Type::getAs(), clang::Type::getPointeeType(), clang::ValueDecl::getType(), and clang::T.

Referenced by clang::Sema::ActOnStartOfObjCMethodDef().

HelperIsMethodInObjCType()

static bool HelperIsMethodInObjCType ( Sema &  S, Selector  Sel, QualType  ObjectType  )

static

Definition at line 3700 of file SemaDeclObjC.cpp.

References clang::QualType::isNull(), and clang::Sema::LookupMethodInObjectType().

Referenced by clang::Sema::SelectorsForTypoCorrection().

HelperSelectorsForTypoCorrection()

static void HelperSelectorsForTypoCorrection ( SmallVectorImpl< const ObjCMethodDecl * > &  BestMethod, StringRef  Typo, const ObjCMethodDecl *  Method  )

static

Definition at line 3678 of file SemaDeclObjC.cpp.

References abs(), clang::Selector::getAsString(), and clang::ObjCMethodDecl::getSelector().

Referenced by clang::Sema::SelectorsForTypoCorrection().

isAcceptableMethodMismatch()

static bool isAcceptableMethodMismatch ( ObjCMethodDecl *  chosen, ObjCMethodDecl *  other  )

static

Determines if this is an "acceptable" loose mismatch in the global method pool.

This exists mostly as a hack to get around certain global mismatches which we can't afford to make warnings / errors. Really, what we want is a way to take a method out of the global method pool.

Definition at line 3465 of file SemaDeclObjC.cpp.

References clang::Selector::getNameForSlot(), clang::ObjCMethodDecl::getReturnType(), clang::ObjCMethodDecl::getSelector(), clang::ObjCMethodDecl::isDirectMethod(), clang::ObjCMethodDecl::isInstanceMethod(), clang::Type::isIntegerType(), and clang::Selector::isUnarySelector().

Referenced by clang::Sema::DiagnoseMultipleMethodInGlobalPool().

isMethodContextSameForKindofLookup()

static bool isMethodContextSameForKindofLookup ( ObjCMethodDecl *  Method, ObjCMethodDecl *  MethodInList  )

static

Definition at line 3302 of file SemaDeclObjC.cpp.

References clang::ObjCMethodDecl::getClassInterface(), and clang::Decl::getDeclContext().

Referenced by clang::Sema::addMethodToGlobalList().

isObjCTypeSubstitutable()

static bool isObjCTypeSubstitutable ( ASTContext &  Context, const ObjCObjectPointerType *  A, const ObjCObjectPointerType *  B, bool  rejectId  )

static

Determines if type B can be substituted for type A.

Returns true if we can guarantee that anything that the user will do to an object of type A can also be done to an object of type B. This is trivially true if the two types are the same, or if B is a subclass of A. It becomes more complex in cases where protocols are involved.

Object types in Objective-C describe the minimum requirements for an object, rather than providing a complete description of a type. For example, if A is a subclass of B, then B* may refer to an instance of A. The principle of substitutability means that we may use an instance of A anywhere that we may use an instance of B - it will implement all of the ivars of B and all of the methods of B.

This substitutability is important when type checking methods, because the implementation may have stricter type definitions than the interface. The interface specifies minimum requirements, but the implementation may have more accurate ones. For example, a method may privately accept instances of B, but only publish that it accepts instances of A. Any object passed to it will be type checked against B, and so will implicitly by a valid A*. Similarly, a method may return a subclass of the class that it is declared as returning.

This is most important when considering subclassing. A method in a subclass must accept any object as an argument that its superclass's implementation accepts. It may, however, accept a more general type without breaking substitutability (i.e. you can still use the subclass anywhere that you can use the superclass, but not vice versa). The converse requirement applies to return types: the return type for a subclass method must be a valid object of the kind that the superclass advertises, but it may be specified more accurately. This avoids the need for explicit down-casting by callers.

Note: This is a stricter requirement than for assignment.

Definition at line 2308 of file SemaDeclObjC.cpp.

References clang::ASTContext::canAssignObjCInterfaces(), clang::ObjCObjectPointerType::isObjCIdType(), clang::ObjCObjectPointerType::isObjCQualifiedIdType(), and clang::ASTContext::ObjCQualifiedIdTypesAreCompatible().

Referenced by CheckMethodOverrideParam(), and CheckMethodOverrideReturn().

IsVariableSizedType()

static bool IsVariableSizedType ( QualType  T )

static

Definition at line 3846 of file SemaDeclObjC.cpp.

References clang::Type::getAs(), clang::Type::isIncompleteArrayType(), and clang::T.

Referenced by DiagnoseVariableSizedIvars().

matchTypes()

static bool matchTypes ( ASTContext &  Context, Sema::MethodMatchStrategy  strategy, QualType  leftQT, QualType  rightQT  )

static

Definition at line 3167 of file SemaDeclObjC.cpp.

References clang::TypeInfo::Align, clang::ASTContext::getCanonicalType(), clang::Type::getScalarTypeKind(), clang::ASTContext::getTypeInfo(), clang::CanQual< T >::getTypePtr(), clang::CanQual< T >::getUnqualifiedType(), clang::Type::isIncompleteType(), clang::Type::isScalarType(), clang::Sema::MMS_strict, clang::Type::STK_BlockPointer, clang::Type::STK_Bool, clang::Type::STK_CPointer, clang::Type::STK_Integral, clang::Type::STK_ObjCObjectPointer, tryMatchRecordTypes(), and clang::TypeInfo::Width.

Referenced by clang::Sema::MatchTwoMethodDeclarations(), and tryMatchRecordTypes().

mergeInterfaceMethodToImpl()

static void mergeInterfaceMethodToImpl ( Sema &  S, ObjCMethodDecl *  method, ObjCMethodDecl *  prevMethod  )

static

Merge information from the declaration of a method in the @interface (or a category/extension) into the corresponding method in the @implementation (for a class or category).

Definition at line 4586 of file SemaDeclObjC.cpp.

References clang::Decl::addAttr(), clang::Sema::Context, clang::SourceRange::getBegin(), clang::Decl::getLocation(), clang::ParmVarDecl::getObjCDeclQualifier(), clang::ObjCMethodDecl::getObjCDeclQualifier(), clang::ObjCMethodDecl::getReturnType(), clang::ObjCMethodDecl::getReturnTypeSourceRange(), clang::ValueDecl::getType(), clang::Decl::hasAttr(), mergeTypeNullabilityForRedecl(), clang::Decl::OBJC_TQ_CSNullability, clang::ObjCMethodDecl::param_begin(), clang::ObjCMethodDecl::param_size(), clang::ObjCMethodDecl::setReturnType(), and clang::ValueDecl::setType().

Referenced by clang::Sema::ActOnMethodDeclaration().

mergeObjCDirectMembers()

static void mergeObjCDirectMembers ( Sema &  S, Decl *  CD, ObjCMethodDecl *  Method  )

static

Definition at line 4670 of file SemaDeclObjC.cpp.

References clang::Decl::addAttr(), clang::Sema::Context, clang::Decl::getLocation(), clang::Decl::hasAttr(), and clang::ObjCMethodDecl::isDirectMethod().

Referenced by clang::Sema::ActOnMethodDeclaration().

mergeTypeNullabilityForRedecl()

static QualType mergeTypeNullabilityForRedecl ( Sema &  S, SourceLocation  loc, QualType  type, bool  usesCSKeyword, SourceLocation  prevLoc, QualType  prevType, bool  prevUsesCSKeyword  )

static

Merge type nullability from for a redeclaration of the same entity, producing the updated type of the redeclared entity.

Definition at line 4546 of file SemaDeclObjC.cpp.

References clang::Sema::Context, clang::SemaBase::Diag(), clang::ASTContext::getAttributedType(), clang::Type::getNullability(), clang::AttributedType::getNullabilityAttrKind(), and clang::ast_matchers::type.

Referenced by mergeInterfaceMethodToImpl().

NestedProtocolHasNoDefinition()

static bool NestedProtocolHasNoDefinition ( ObjCProtocolDecl *  PDecl, ObjCProtocolDecl *&  UndefinedProtocol  )

static

Definition at line 1296 of file SemaDeclObjC.cpp.

References clang::ObjCProtocolDecl::getDefinition(), clang::ObjCProtocolDecl::hasDefinition(), clang::Decl::isUnconditionallyVisible(), NestedProtocolHasNoDefinition(), and clang::ObjCProtocolDecl::protocols().

Referenced by clang::Sema::actOnObjCTypeArgsOrProtocolQualifiers(), clang::Sema::FindProtocolDeclaration(), and NestedProtocolHasNoDefinition().

objcModifiersConflict()

static bool objcModifiersConflict ( Decl::ObjCDeclQualifier  x, Decl::ObjCDeclQualifier  y  )

static

Determine whether two set of Objective-C declaration qualifiers conflict.

Definition at line 2345 of file SemaDeclObjC.cpp.

References clang::Decl::OBJC_TQ_CSNullability.

Referenced by CheckMethodOverrideParam(), and CheckMethodOverrideReturn().

shouldWarnUndefinedMethod()

static bool shouldWarnUndefinedMethod ( const ObjCMethodDecl *  M )

static

Definition at line 2236 of file SemaDeclObjC.cpp.

References clang::AR_Unavailable, and clang::Decl::getAvailability().

Referenced by WarnUndefinedMethod().

tryMatchRecordTypes()

static bool tryMatchRecordTypes ( ASTContext &  Context, Sema::MethodMatchStrategy  strategy, const Type *  left, const Type *  right  )

static

Definition at line 3224 of file SemaDeclObjC.cpp.

References clang::TypeInfo::Align, clang::RecordDecl::field_begin(), clang::RecordDecl::field_end(), clang::ASTContext::getTypeInfo(), clang::TagDecl::isUnion(), matchTypes(), and clang::TypeInfo::Width.

Referenced by matchTypes().

WarnUndefinedMethod()

static void WarnUndefinedMethod ( Sema &  S, ObjCImplDecl *  Impl, ObjCMethodDecl *  method, bool &  IncompleteImpl, unsigned  DiagID, NamedDecl *  NeededFor = nullptr  )

static

Definition at line 2241 of file SemaDeclObjC.cpp.

References clang::FixItHint::CreateInsertion(), clang::SemaBase::Diag(), clang::Decl::getASTContext(), clang::ObjCContainerDecl::getAtEndRange(), clang::SourceRange::getBegin(), clang::ObjCMethodDecl::getBeginLoc(), clang::Decl::getLocation(), clang::ASTContext::getPrintingPolicy(), clang::SourceLocation::isValid(), and shouldWarnUndefinedMethod().

Referenced by CheckProtocolMethodDefs(), and clang::Sema::MatchAllMethodDeclarations().