clang::sema Namespace Reference

Classes
class	AccessedEntity
	A declaration being accessed, together with information about how it was accessed. More...
class	AnalysisBasedWarnings
struct	AssignedEntity
	Describes an entity that is being assigned. More...
class	BlockScopeInfo
	Retains information about a block that is currently being parsed. More...
class	Capture
class	CapturedRegionScopeInfo
	Retains information about a captured region. More...
class	CapturingScopeInfo
class	CompoundScopeInfo
	Contains information about the compound statement currently being parsed. More...
class	DelayedDiagnostic
	A diagnostic message which has been conditionally emitted pending the complete parsing of the current declaration. More...
class	DelayedDiagnosticPool
	A collection of diagnostics which were delayed. More...
class	FunctionScopeInfo
	Retains information about a function, method, or block that is currently being parsed. More...
class	LambdaScopeInfo
class	PossiblyUnreachableDiag
class	RISCVIntrinsicManager
class	SemaPPCallbacks
class	TemplateDeductionInfo
	Provides information about an attempted template argument deduction, whose success or failure was described by a TemplateDeductionResult value. More...

Enumerations
enum class	FirstCoroutineStmtKind { CoReturn , CoAwait , CoYield }
enum	PathLifetimeKind { Extend , ShouldExtend , NoExtend }
	Whether a path to an object supports lifetime extension. More...

Functions
static LifetimeResult	getEntityLifetime (const InitializedEntity *Entity, const InitializedEntity *InitField=nullptr)
	Determine the declaration which an initialized entity ultimately refers to, for the purpose of lifetime-extending a temporary bound to a reference in the initialization of Entity.
static bool	isVarOnPath (IndirectLocalPath &Path, VarDecl *VD)
static bool	pathContainsInit (IndirectLocalPath &Path)
static void	visitLocalsRetainedByInitializer (IndirectLocalPath &Path, Expr *Init, LocalVisitor Visit, bool RevisitSubinits, bool EnableLifetimeWarnings)
	Visit the locals that would be reachable through an object initialized by the prvalue expression Init.
static void	visitLocalsRetainedByReferenceBinding (IndirectLocalPath &Path, Expr *Init, ReferenceKind RK, LocalVisitor Visit, bool EnableLifetimeWarnings)
	Visit the locals that would be reachable through a reference bound to the glvalue expression Init.
template<typename T >
static bool	isRecordWithAttr (QualType Type)
static bool	isInStlNamespace (const Decl *D)
static bool	shouldTrackImplicitObjectArg (const CXXMethodDecl *Callee)
static bool	shouldTrackFirstArgument (const FunctionDecl *FD)
static void	handleGslAnnotatedTypes (IndirectLocalPath &Path, Expr *Call, LocalVisitor Visit)
static bool	implicitObjectParamIsLifetimeBound (const FunctionDecl *FD)
static void	visitLifetimeBoundArguments (IndirectLocalPath &Path, Expr *Call, LocalVisitor Visit)
static PathLifetimeKind	shouldLifetimeExtendThroughPath (const IndirectLocalPath &Path)
	Determine whether this is an indirect path to a temporary that we are supposed to lifetime-extend along.
static SourceRange	nextPathEntryRange (const IndirectLocalPath &Path, unsigned I, Expr *E)
	Find the range for the first interesting entry in the path at or after I.
static bool	pathOnlyHandlesGslPointer (IndirectLocalPath &Path)
static void	checkExprLifetimeImpl (Sema &SemaRef, const InitializedEntity *InitEntity, const InitializedEntity *ExtendingEntity, LifetimeKind LK, const AssignedEntity *AEntity, Expr *Init, bool EnableLifetimeWarnings)
void	checkExprLifetime (Sema &SemaRef, const InitializedEntity &Entity, Expr *Init)
	Check that the lifetime of the given expr (and its subobjects) is sufficient for initializing the entity, and perform lifetime extension (when permitted) if not.
void	checkExprLifetime (Sema &SemaRef, const AssignedEntity &Entity, Expr *Init)
	Check that the lifetime of the given expr (and its subobjects) is sufficient for assigning to the entity.
Attr *	instantiateTemplateAttribute (const Attr *At, ASTContext &C, Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs)
Attr *	instantiateTemplateAttributeForDecl (const Attr *At, ASTContext &C, Sema &S, const MultiLevelTemplateArgumentList &TemplateArgs)

Enumeration Type Documentation

FirstCoroutineStmtKind

enum class clang::sema::FirstCoroutineStmtKind

strong

Enumerator
CoReturn
CoAwait
CoYield

Definition at line 100 of file ScopeInfo.h.

PathLifetimeKind

enum clang::sema::PathLifetimeKind

Whether a path to an object supports lifetime extension.

Enumerator
Extend	Lifetime-extend along this path.
ShouldExtend	We should lifetime-extend, but we don't because (due to technical limitations) we can't. This happens for default member initializers, which we don't clone for every use, so we don't have a unique MaterializeTemporaryExpr to update.
NoExtend	Do not lifetime extend along this path.

Definition at line 912 of file CheckExprLifetime.cpp.

Function Documentation

checkExprLifetime() [1/2]

void clang::sema::checkExprLifetime	(	Sema &	SemaRef,
		const AssignedEntity &	Entity,
		Expr *	Init
	)

Check that the lifetime of the given expr (and its subobjects) is sufficient for assigning to the entity.

Definition at line 1313 of file CheckExprLifetime.cpp.

References checkExprLifetime(), checkExprLifetimeImpl(), clang::Sema::getDiagnostics(), clang::Expr::getType(), clang::DiagnosticsEngine::isIgnored(), clang::Type::isPointerType(), and clang::sema::AssignedEntity::LHS.

checkExprLifetime() [2/2]

void clang::sema::checkExprLifetime	(	Sema &	SemaRef,
		const InitializedEntity &	Entity,
		Expr *	Init
	)

Check that the lifetime of the given expr (and its subobjects) is sufficient for initializing the entity, and perform lifetime extension (when permitted) if not.

Definition at line 1302 of file CheckExprLifetime.cpp.

References checkExprLifetime(), checkExprLifetimeImpl(), clang::Sema::getDiagnostics(), getEntityLifetime(), and clang::DiagnosticsEngine::isIgnored().

Referenced by clang::Sema::CheckAssignmentOperands(), checkExprLifetime(), clang::Sema::checkInitializerLifetime(), and clang::Sema::CreateOverloadedBinOp().

checkExprLifetimeImpl()

static void clang::sema::checkExprLifetimeImpl ( Sema &  SemaRef, const InitializedEntity *  InitEntity, const InitializedEntity *  ExtendingEntity, LifetimeKind  LK, const AssignedEntity *  AEntity, Expr *  Init, bool  EnableLifetimeWarnings  )

static

Definition at line 988 of file CheckExprLifetime.cpp.

References clang::InitializedEntity::allocateManglingNumber(), clang::SemaBase::Diag(), Extend, clang::SourceRange::getBegin(), clang::InitializedEntity::getDecl(), clang::NamedDecl::getDeclName(), clang::Sema::getLangOpts(), clang::Decl::getLocation(), clang::InitializedEntity::getParent(), clang::ValueDecl::getType(), clang::Expr::getType(), clang::InitializedEntity::getType(), clang::Init, clang::Decl::isImplicit(), clang::ValueDecl::isInitCapture(), clang::Type::isReferenceType(), clang::SourceLocation::isValid(), clang::LCK_ByRef, clang::sema::AssignedEntity::LHS, clang::Member, nextPathEntryRange(), NoExtend, Path, pathContainsInit(), pathOnlyHandlesGslPointer(), ShouldExtend, and shouldLifetimeExtendThroughPath().

Referenced by checkExprLifetime().

getEntityLifetime()

static LifetimeResult clang::sema::getEntityLifetime ( const InitializedEntity *  Entity, const InitializedEntity *  InitField = nullptr  )

static

Determine the declaration which an initialized entity ultimately refers to, for the purpose of lifetime-extending a temporary bound to a reference in the initialization of Entity.

Definition at line 57 of file CheckExprLifetime.cpp.

References clang::InitializedEntity::EK_ArrayElement, clang::InitializedEntity::EK_Base, clang::InitializedEntity::EK_Binding, clang::InitializedEntity::EK_BlockElement, clang::InitializedEntity::EK_ComplexElement, clang::InitializedEntity::EK_CompoundLiteralInit, clang::InitializedEntity::EK_Delegating, clang::InitializedEntity::EK_Exception, clang::InitializedEntity::EK_LambdaCapture, clang::InitializedEntity::EK_LambdaToBlockConversionBlockElement, clang::InitializedEntity::EK_Member, clang::InitializedEntity::EK_New, clang::InitializedEntity::EK_Parameter, clang::InitializedEntity::EK_Parameter_CF_Audited, clang::InitializedEntity::EK_ParenAggInitMember, clang::InitializedEntity::EK_RelatedResult, clang::InitializedEntity::EK_Result, clang::InitializedEntity::EK_StmtExprResult, clang::InitializedEntity::EK_TemplateParameter, clang::InitializedEntity::EK_Temporary, clang::InitializedEntity::EK_Variable, clang::InitializedEntity::EK_VectorElement, getEntityLifetime(), clang::InitializedEntity::getKind(), clang::InitializedEntity::getParent(), and clang::InitializedEntity::isDefaultMemberInitializer().

Referenced by checkExprLifetime(), and getEntityLifetime().

handleGslAnnotatedTypes()

static void clang::sema::handleGslAnnotatedTypes ( IndirectLocalPath &  Path, Expr *  Call, LocalVisitor  Visit  )

static

Definition at line 329 of file CheckExprLifetime.cpp.

References clang::Call, D, clang::DeclContext::getParent(), clang::Decl::hasAttr(), Path, shouldTrackFirstArgument(), shouldTrackImplicitObjectArg(), visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

Referenced by visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

implicitObjectParamIsLifetimeBound()

static bool clang::sema::implicitObjectParamIsLifetimeBound ( const FunctionDecl *  FD )

static

Definition at line 389 of file CheckExprLifetime.cpp.

References clang::TypeLoc::getAsAdjusted(), clang::Decl::getASTContext(), clang::AttributedTypeLoc::getAttrAs(), clang::DeclarationName::getCXXOverloadedOperator(), clang::NamedDecl::getDeclName(), clang::ASTContext::getLValueReferenceType(), clang::AttributedTypeLoc::getModifiedLoc(), clang::FunctionDecl::getReturnType(), clang::TypeSourceInfo::getTypeLoc(), clang::DeclaratorDecl::getTypeSourceInfo(), clang::ASTContext::hasSameType(), clang::isCompoundAssignmentOperator(), and clang::Type::isLValueReferenceType().

Referenced by visitLifetimeBoundArguments().

instantiateTemplateAttribute()

Attr * clang::sema::instantiateTemplateAttribute	(	const Attr *	At,
		ASTContext &	C,
		Sema &	S,
		const MultiLevelTemplateArgumentList &	TemplateArgs
	)

Referenced by clang::Sema::InstantiateAttrs(), and clang::Sema::InstantiateClass().

instantiateTemplateAttributeForDecl()

Attr * clang::sema::instantiateTemplateAttributeForDecl	(	const Attr *	At,
		ASTContext &	C,
		Sema &	S,
		const MultiLevelTemplateArgumentList &	TemplateArgs
	)

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

isInStlNamespace()

static bool clang::sema::isInStlNamespace ( const Decl *  D )

static

Definition at line 257 of file CheckExprLifetime.cpp.

References D, clang::DeclContext::isStdNamespace(), and clang::isUppercase().

Referenced by shouldTrackImplicitObjectArg().

isRecordWithAttr()

template<typename T >

static bool clang::sema::isRecordWithAttr ( QualType  Type )

static

Definition at line 248 of file CheckExprLifetime.cpp.

References clang::Type::getAsCXXRecordDecl(), and clang::T.

isVarOnPath()

static bool clang::sema::isVarOnPath ( IndirectLocalPath &  Path, VarDecl *  VD  )

static

Definition at line 224 of file CheckExprLifetime.cpp.

References E, and Path.

Referenced by visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

nextPathEntryRange()

static SourceRange clang::sema::nextPathEntryRange ( const IndirectLocalPath &  Path, unsigned  I, Expr *  E  )

static

Find the range for the first interesting entry in the path at or after I.

Definition at line 939 of file CheckExprLifetime.cpp.

References D, E, Kind, and Path.

Referenced by checkExprLifetimeImpl().

pathContainsInit()

static bool clang::sema::pathContainsInit ( IndirectLocalPath &  Path )

static

Definition at line 231 of file CheckExprLifetime.cpp.

References E, and Path.

Referenced by checkExprLifetimeImpl().

pathOnlyHandlesGslPointer()

static bool clang::sema::pathOnlyHandlesGslPointer ( IndirectLocalPath &  Path )

static

Definition at line 970 of file CheckExprLifetime.cpp.

References Path.

Referenced by checkExprLifetimeImpl().

shouldLifetimeExtendThroughPath()

static PathLifetimeKind clang::sema::shouldLifetimeExtendThroughPath ( const IndirectLocalPath &  Path )

static

Determine whether this is an indirect path to a temporary that we are supposed to lifetime-extend along.

Definition at line 927 of file CheckExprLifetime.cpp.

References Extend, Kind, NoExtend, Path, and ShouldExtend.

Referenced by checkExprLifetimeImpl().

shouldTrackFirstArgument()

static bool clang::sema::shouldTrackFirstArgument ( const FunctionDecl *  FD )

static

Definition at line 306 of file CheckExprLifetime.cpp.

References clang::NamedDecl::getIdentifier(), clang::NamedDecl::getName(), clang::FunctionDecl::getNumParams(), clang::FunctionDecl::getParamDecl(), clang::Type::getPointeeCXXRecordDecl(), clang::FunctionDecl::getReturnType(), clang::ValueDecl::getType(), clang::Decl::isInStdNamespace(), clang::Type::isPointerType(), and clang::Type::isReferenceType().

Referenced by handleGslAnnotatedTypes().

shouldTrackImplicitObjectArg()

static bool clang::sema::shouldTrackImplicitObjectArg ( const CXXMethodDecl *  Callee )

static

Definition at line 272 of file CheckExprLifetime.cpp.

References isInStlNamespace().

Referenced by handleGslAnnotatedTypes().

visitLifetimeBoundArguments()

static void clang::sema::visitLifetimeBoundArguments ( IndirectLocalPath &  Path, Expr *  Call, LocalVisitor  Visit  )

static

Definition at line 426 of file CheckExprLifetime.cpp.

References clang::Call, clang::Sema::CanBeGetReturnObject(), D, clang::Expr::IgnoreImplicit(), implicitObjectParamIsLifetimeBound(), Path, visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

Referenced by visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

visitLocalsRetainedByInitializer()

static void clang::sema::visitLocalsRetainedByInitializer ( IndirectLocalPath &  Path, Expr *  Init, LocalVisitor  Visit, bool  RevisitSubinits, bool  EnableLifetimeWarnings  )

static

Visit the locals that would be reachable through an object initialized by the prvalue expression Init.

Definition at line 637 of file CheckExprLifetime.cpp.

References clang::C, clang::LambdaCapture::capturesVariable(), E, handleGslAnnotatedTypes(), clang::Init, isVarOnPath(), Path, visitLifetimeBoundArguments(), visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

Referenced by handleGslAnnotatedTypes(), visitLifetimeBoundArguments(), visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

visitLocalsRetainedByReferenceBinding()

static void clang::sema::visitLocalsRetainedByReferenceBinding ( IndirectLocalPath &  Path, Expr *  Init, ReferenceKind  RK, LocalVisitor  Visit, bool  EnableLifetimeWarnings  )

static

Visit the locals that would be reachable through a reference bound to the glvalue expression Init.

Definition at line 493 of file CheckExprLifetime.cpp.

References clang::C, handleGslAnnotatedTypes(), clang::Init, isVarOnPath(), Path, visitLifetimeBoundArguments(), visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().

Referenced by handleGslAnnotatedTypes(), visitLifetimeBoundArguments(), visitLocalsRetainedByInitializer(), and visitLocalsRetainedByReferenceBinding().