This represents one expression. More...

#include "clang/AST/Expr.h"

Inherited by clang::AbstractConditionalOperator, clang::AddrLabelExpr, clang::ArrayInitIndexExpr, clang::ArrayInitLoopExpr, clang::ArraySectionExpr, clang::ArraySubscriptExpr, clang::ArrayTypeTraitExpr, clang::AsTypeExpr, clang::AtomicExpr, clang::BinaryOperator, clang::BlockExpr, clang::CXXBindTemporaryExpr, clang::CXXBoolLiteralExpr, clang::CXXConstructExpr, clang::CXXDefaultArgExpr, clang::CXXDefaultInitExpr, clang::CXXDeleteExpr, clang::CXXDependentScopeMemberExpr, clang::CXXFoldExpr, clang::CXXInheritedCtorInitExpr, clang::CXXNewExpr, clang::CXXNoexceptExpr, clang::CXXNullPtrLiteralExpr, clang::CXXParenListInitExpr, clang::CXXPseudoDestructorExpr, clang::CXXRewrittenBinaryOperator, clang::CXXScalarValueInitExpr, clang::CXXStdInitializerListExpr, clang::CXXThisExpr, clang::CXXThrowExpr, clang::CXXTypeidExpr, clang::CXXUnresolvedConstructExpr, clang::CXXUuidofExpr, clang::CallExpr, clang::CastExpr, clang::CharacterLiteral, clang::ChooseExpr, clang::CompoundLiteralExpr, clang::ConceptSpecializationExpr, clang::ConvertVectorExpr, clang::CoroutineSuspendExpr, clang::DeclRefExpr, clang::DependentCoawaitExpr, clang::DependentScopeDeclRefExpr, clang::DesignatedInitExpr, clang::DesignatedInitUpdateExpr, clang::EmbedExpr, clang::ExpressionTraitExpr, clang::ExtVectorElementExpr, clang::FixedPointLiteral, clang::FloatingLiteral, clang::FullExpr, clang::FunctionParmPackExpr, clang::GNUNullExpr, clang::GenericSelectionExpr, clang::HLSLOutArgExpr, clang::ImaginaryLiteral, clang::ImplicitValueInitExpr, clang::InitListExpr, clang::IntegerLiteral, clang::LambdaExpr, clang::MSPropertyRefExpr, clang::MSPropertySubscriptExpr, clang::MaterializeTemporaryExpr, clang::MatrixSubscriptExpr, clang::MemberExpr, clang::NoInitExpr, clang::OMPArrayShapingExpr, clang::OMPIteratorExpr, clang::ObjCArrayLiteral, clang::ObjCAvailabilityCheckExpr, clang::ObjCBoolLiteralExpr, clang::ObjCBoxedExpr, clang::ObjCDictionaryLiteral, clang::ObjCEncodeExpr, clang::ObjCIndirectCopyRestoreExpr, clang::ObjCIsaExpr, clang::ObjCIvarRefExpr, clang::ObjCMessageExpr, clang::ObjCPropertyRefExpr, clang::ObjCProtocolExpr, clang::ObjCSelectorExpr, clang::ObjCStringLiteral, clang::ObjCSubscriptRefExpr, clang::OffsetOfExpr, clang::OpaqueValueExpr, clang::OpenACCAsteriskSizeExpr, clang::OverloadExpr, clang::PackExpansionExpr, clang::PackIndexingExpr, clang::ParenExpr, clang::ParenListExpr, clang::PredefinedExpr, clang::PseudoObjectExpr, clang::RecoveryExpr, clang::RequiresExpr, clang::SYCLUniqueStableNameExpr, clang::ShuffleVectorExpr, clang::SizeOfPackExpr, clang::SourceLocExpr, clang::StmtExpr, clang::StringLiteral, clang::SubstNonTypeTemplateParmExpr, clang::SubstNonTypeTemplateParmPackExpr, clang::TypeTraitExpr, clang::UnaryExprOrTypeTraitExpr, clang::UnaryOperator, and clang::VAArgExpr.

Classes
class	Classification
	The return type of classify(). More...
struct	EvalResult
	EvalResult is a struct with detailed info about an evaluated expression. More...
struct	EvalStatus
	EvalStatus is a struct with detailed info about an evaluation in progress. More...

Public Types
enum	LValueClassification { LV_Valid , LV_NotObjectType , LV_IncompleteVoidType , LV_DuplicateVectorComponents , LV_InvalidExpression , LV_InvalidMessageExpression , LV_MemberFunction , LV_SubObjCPropertySetting , LV_ClassTemporary , LV_ArrayTemporary }
enum	isModifiableLvalueResult { MLV_Valid , MLV_NotObjectType , MLV_IncompleteVoidType , MLV_DuplicateVectorComponents , MLV_InvalidExpression , MLV_LValueCast , MLV_IncompleteType , MLV_ConstQualified , MLV_ConstQualifiedField , MLV_ConstAddrSpace , MLV_ArrayType , MLV_NoSetterProperty , MLV_MemberFunction , MLV_SubObjCPropertySetting , MLV_InvalidMessageExpression , MLV_ClassTemporary , MLV_ArrayTemporary }
enum	SideEffectsKind { SE_NoSideEffects , SE_AllowUndefinedBehavior , SE_AllowSideEffects }
enum class	ConstantExprKind { Normal , NonClassTemplateArgument , ClassTemplateArgument , ImmediateInvocation }
enum	NullPointerConstantKind { NPCK_NotNull = 0 , NPCK_ZeroExpression , NPCK_ZeroLiteral , NPCK_CXX11_nullptr , NPCK_GNUNull }
	Enumeration used to describe the kind of Null pointer constant returned from `isNullPointerConstant()`. More...
enum	NullPointerConstantValueDependence { NPC_NeverValueDependent = 0 , NPC_ValueDependentIsNull , NPC_ValueDependentIsNotNull }
	Enumeration used to describe how `isNullPointerConstant()` should cope with value-dependent expressions. More...
Public Types inherited from clang::Stmt
enum	StmtClass { NoStmtClass = 0 }
enum	Likelihood { LH_Unlikely = -1 , LH_None , LH_Likely }
	The likelihood of a branch being taken. More...
using	child_iterator = StmtIterator
	Child Iterators: All subclasses must implement 'children' to permit easy iteration over the substatements/subexpressions of an AST node.
using	const_child_iterator = ConstStmtIterator
using	child_range = llvm::iterator_range<child_iterator>
using	const_child_range = llvm::iterator_range<const_child_iterator>

Public Member Functions
	Expr ()=delete
	Expr (const Expr &)=delete
	Expr (Expr &&)=delete
Expr &	operator= (const Expr &)=delete
Expr &	operator= (Expr &&)=delete
QualType	getType () const
void	setType (QualType t)
QualType	getEnumCoercedType (const ASTContext &Ctx) const
	If this expression is an enumeration constant, return the enumeration type under which said constant was declared.
ExprDependence	getDependence () const
bool	isValueDependent () const
	Determines whether the value of this expression depends on.
bool	isTypeDependent () const
	Determines whether the type of this expression depends on.
bool	isInstantiationDependent () const
	Whether this expression is instantiation-dependent, meaning that it depends in some way on.
bool	containsUnexpandedParameterPack () const
	Whether this expression contains an unexpanded parameter pack (for C++11 variadic templates).
bool	containsErrors () const
	Whether this expression contains subexpressions which had errors.
SourceLocation	getExprLoc () const LLVM_READONLY
	getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic expression.
bool	isReadIfDiscardedInCPlusPlus11 () const
	Determine whether an lvalue-to-rvalue conversion should implicitly be applied to this expression if it appears as a discarded-value expression in C++11 onwards.
bool	isUnusedResultAWarning (const Expr *&WarnExpr, SourceLocation &Loc, SourceRange &R1, SourceRange &R2, ASTContext &Ctx) const
	isUnusedResultAWarning - Return true if this immediate expression should be warned about if the result is unused.
bool	isLValue () const
	isLValue - True if this expression is an "l-value" according to the rules of the current language.
bool	isPRValue () const
bool	isXValue () const
bool	isGLValue () const
LValueClassification	ClassifyLValue (ASTContext &Ctx) const
	Reasons why an expression might not be an l-value.
isModifiableLvalueResult	isModifiableLvalue (ASTContext &Ctx, SourceLocation *Loc=nullptr) const
	isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, does not have an incomplete type, does not have a const-qualified type, and if it is a structure or union, does not have any member (including, recursively, any member or element of all contained aggregates or unions) with a const-qualified type.
Classification	Classify (ASTContext &Ctx) const
	Classify - Classify this expression according to the C++11 expression taxonomy.
Classification	ClassifyModifiable (ASTContext &Ctx, SourceLocation &Loc) const
	ClassifyModifiable - Classify this expression according to the C++11 expression taxonomy, and see if it is valid on the left side of an assignment.
FPOptions	getFPFeaturesInEffect (const LangOptions &LO) const
	Returns the set of floating point options that apply to this expression.
ExprValueKind	getValueKind () const
	getValueKind - The value kind that this expression produces.
ExprObjectKind	getObjectKind () const
	getObjectKind - The object kind that this expression produces.
bool	isOrdinaryOrBitFieldObject () const
void	setValueKind (ExprValueKind Cat)
	setValueKind - Set the value kind produced by this expression.
void	setObjectKind (ExprObjectKind Cat)
	setObjectKind - Set the object kind produced by this expression.
bool	refersToBitField () const
	Returns true if this expression is a gl-value that potentially refers to a bit-field.
FieldDecl *	getSourceBitField ()
	If this expression refers to a bit-field, retrieve the declaration of that bit-field.
EnumConstantDecl *	getEnumConstantDecl ()
	If this expression refers to an enum constant, retrieve its declaration.
const EnumConstantDecl *	getEnumConstantDecl () const
const FieldDecl *	getSourceBitField () const
Decl *	getReferencedDeclOfCallee ()
const Decl *	getReferencedDeclOfCallee () const
const ObjCPropertyRefExpr *	getObjCProperty () const
	If this expression is an l-value for an Objective C property, find the underlying property reference expression.
bool	isObjCSelfExpr () const
	Check if this expression is the ObjC 'self' implicit parameter.
bool	refersToVectorElement () const
	Returns whether this expression refers to a vector element.
bool	refersToMatrixElement () const
	Returns whether this expression refers to a matrix element.
bool	refersToGlobalRegisterVar () const
	Returns whether this expression refers to a global register variable.
bool	hasPlaceholderType () const
	Returns whether this expression has a placeholder type.
bool	hasPlaceholderType (BuiltinType::Kind K) const
	Returns whether this expression has a specific placeholder type.
bool	isKnownToHaveBooleanValue (bool Semantic=true) const
	isKnownToHaveBooleanValue - Return true if this is an integer expression that is known to return 0 or 1.
bool	isFlexibleArrayMemberLike (const ASTContext &Context, LangOptions::StrictFlexArraysLevelKind StrictFlexArraysLevel, bool IgnoreTemplateOrMacroSubstitution=false) const
	Check whether this array fits the idiom of a flexible array member, depending on the value of -fstrict-flex-array.
std::optional< llvm::APSInt >	getIntegerConstantExpr (const ASTContext &Ctx) const
	isIntegerConstantExpr - Return the value if this expression is a valid integer constant expression.
bool	isIntegerConstantExpr (const ASTContext &Ctx) const
bool	isCXX98IntegralConstantExpr (const ASTContext &Ctx) const
	isCXX98IntegralConstantExpr - Return true if this expression is an integral constant expression in C++98.
bool	isCXX11ConstantExpr (const ASTContext &Ctx, APValue *Result=nullptr) const
	isCXX11ConstantExpr - Return true if this expression is a constant expression in C++11.
bool	isConstantInitializer (ASTContext &Ctx, bool ForRef, const Expr **Culprit=nullptr) const
	isConstantInitializer - Returns true if this expression can be emitted to IR as a constant, and thus can be used as a constant initializer in C.
const ValueDecl *	getAsBuiltinConstantDeclRef (const ASTContext &Context) const
	If this expression is an unambiguous reference to a single declaration, in the style of __builtin_function_start, return that declaration.
bool	EvaluateAsRValue (EvalResult &Result, const ASTContext &Ctx, bool InConstantContext=false) const
	EvaluateAsRValue - Return true if this is a constant which we can fold to an rvalue using any crazy technique (that has nothing to do with language standards) that we want to, even if the expression has side-effects.
bool	EvaluateAsBooleanCondition (bool &Result, const ASTContext &Ctx, bool InConstantContext=false) const
	EvaluateAsBooleanCondition - Return true if this is a constant which we can fold and convert to a boolean condition using any crazy technique that we want to, even if the expression has side-effects.
bool	EvaluateAsInt (EvalResult &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects, bool InConstantContext=false) const
	EvaluateAsInt - Return true if this is a constant which we can fold and convert to an integer, using any crazy technique that we want to.
bool	EvaluateAsFloat (llvm::APFloat &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects, bool InConstantContext=false) const
	EvaluateAsFloat - Return true if this is a constant which we can fold and convert to a floating point value, using any crazy technique that we want to.
bool	EvaluateAsFixedPoint (EvalResult &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects, bool InConstantContext=false) const
	EvaluateAsFixedPoint - Return true if this is a constant which we can fold and convert to a fixed point value.
bool	isEvaluatable (const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) const
	isEvaluatable - Call EvaluateAsRValue to see if this expression can be constant folded without side-effects, but discard the result.
bool	HasSideEffects (const ASTContext &Ctx, bool IncludePossibleEffects=true) const
	HasSideEffects - This routine returns true for all those expressions which have any effect other than producing a value.
bool	hasNonTrivialCall (const ASTContext &Ctx) const
	Determine whether this expression involves a call to any function that is not trivial.
llvm::APSInt	EvaluateKnownConstInt (const ASTContext &Ctx) const
	EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded integer.
llvm::APSInt	EvaluateKnownConstIntCheckOverflow (const ASTContext &Ctx, SmallVectorImpl< PartialDiagnosticAt > *Diag=nullptr) const
void	EvaluateForOverflow (const ASTContext &Ctx) const
bool	EvaluateAsLValue (EvalResult &Result, const ASTContext &Ctx, bool InConstantContext=false) const
	EvaluateAsLValue - Evaluate an expression to see if we can fold it to an lvalue with link time known address, with no side-effects.
bool	EvaluateAsInitializer (APValue &Result, const ASTContext &Ctx, const VarDecl *VD, SmallVectorImpl< PartialDiagnosticAt > &Notes, bool IsConstantInitializer) const
	EvaluateAsInitializer - Evaluate an expression as if it were the initializer of the given declaration.
bool	EvaluateWithSubstitution (APValue &Value, ASTContext &Ctx, const FunctionDecl Callee, ArrayRef< const Expr > Args, const Expr *This=nullptr) const
	EvaluateWithSubstitution - Evaluate an expression as if from the context of a call to the given function with the given arguments, inside an unevaluated context.
bool	EvaluateAsConstantExpr (EvalResult &Result, const ASTContext &Ctx, ConstantExprKind Kind=ConstantExprKind::Normal) const
	Evaluate an expression that is required to be a constant expression.
bool	tryEvaluateObjectSize (uint64_t &Result, ASTContext &Ctx, unsigned Type) const
	If the current Expr is a pointer, this will try to statically determine the number of bytes available where the pointer is pointing.
bool	tryEvaluateStrLen (uint64_t &Result, ASTContext &Ctx) const
	If the current Expr is a pointer, this will try to statically determine the strlen of the string pointed to.
bool	EvaluateCharRangeAsString (std::string &Result, const Expr SizeExpression, const Expr PtrExpression, ASTContext &Ctx, EvalResult &Status) const
bool	EvaluateCharRangeAsString (APValue &Result, const Expr SizeExpression, const Expr PtrExpression, ASTContext &Ctx, EvalResult &Status) const
std::optional< std::string >	tryEvaluateString (ASTContext &Ctx) const
	If the current Expr can be evaluated to a pointer to a null-terminated constant string, return the constant string (without the terminating null).
NullPointerConstantKind	isNullPointerConstant (ASTContext &Ctx, NullPointerConstantValueDependence NPC) const
	isNullPointerConstant - C99 6.3.2.3p3 - Test if this reduces down to a Null pointer constant.
bool	isOBJCGCCandidate (ASTContext &Ctx) const
	isOBJCGCCandidate - Return true if this expression may be used in a read/ write barrier.
bool	isBoundMemberFunction (ASTContext &Ctx) const
	Returns true if this expression is a bound member function.
Expr *	IgnoreUnlessSpelledInSource ()
	Skip past any invisible AST nodes which might surround this statement, such as ExprWithCleanups or ImplicitCastExpr nodes, but also injected CXXMemberExpr and CXXConstructExpr which represent implicit conversions.
const Expr *	IgnoreUnlessSpelledInSource () const
Expr *	IgnoreImpCasts () LLVM_READONLY
	Skip past any implicit casts which might surround this expression until reaching a fixed point.
const Expr *	IgnoreImpCasts () const
Expr *	IgnoreCasts () LLVM_READONLY
	Skip past any casts which might surround this expression until reaching a fixed point.
const Expr *	IgnoreCasts () const
Expr *	IgnoreImplicit () LLVM_READONLY
	Skip past any implicit AST nodes which might surround this expression until reaching a fixed point.
const Expr *	IgnoreImplicit () const
Expr *	IgnoreImplicitAsWritten () LLVM_READONLY
	Skip past any implicit AST nodes which might surround this expression until reaching a fixed point.
const Expr *	IgnoreImplicitAsWritten () const
Expr *	IgnoreParens () LLVM_READONLY
	Skip past any parentheses which might surround this expression until reaching a fixed point.
const Expr *	IgnoreParens () const
Expr *	IgnoreParenImpCasts () LLVM_READONLY
	Skip past any parentheses and implicit casts which might surround this expression until reaching a fixed point.
const Expr *	IgnoreParenImpCasts () const
Expr *	IgnoreParenCasts () LLVM_READONLY
	Skip past any parentheses and casts which might surround this expression until reaching a fixed point.
const Expr *	IgnoreParenCasts () const
Expr *	IgnoreConversionOperatorSingleStep () LLVM_READONLY
	Skip conversion operators.
const Expr *	IgnoreConversionOperatorSingleStep () const
Expr *	IgnoreParenLValueCasts () LLVM_READONLY
	Skip past any parentheses and lvalue casts which might surround this expression until reaching a fixed point.
const Expr *	IgnoreParenLValueCasts () const
Expr *	IgnoreParenNoopCasts (const ASTContext &Ctx) LLVM_READONLY
	Skip past any parentheses and casts which do not change the value (including ptr->int casts of the same size) until reaching a fixed point.
const Expr *	IgnoreParenNoopCasts (const ASTContext &Ctx) const
Expr *	IgnoreParenBaseCasts () LLVM_READONLY
	Skip past any parentheses and derived-to-base casts until reaching a fixed point.
const Expr *	IgnoreParenBaseCasts () const
bool	isDefaultArgument () const
	Determine whether this expression is a default function argument.
bool	isTemporaryObject (ASTContext &Ctx, const CXXRecordDecl *TempTy) const
	Determine whether the result of this expression is a temporary object of the given class type.
bool	isImplicitCXXThis () const
	Whether this expression is an implicit reference to 'this' in C++.
const CXXRecordDecl *	getBestDynamicClassType () const
	For an expression of class type or pointer to class type, return the most derived class decl the expression is known to refer to.
const Expr *	getBestDynamicClassTypeExpr () const
	Get the inner expression that determines the best dynamic class.
const Expr *	skipRValueSubobjectAdjustments (SmallVectorImpl< const Expr * > &CommaLHS, SmallVectorImpl< SubobjectAdjustment > &Adjustments) const
	Walk outwards from an expression we want to bind a reference to and find the expression whose lifetime needs to be extended.
const Expr *	skipRValueSubobjectAdjustments () const
Public Member Functions inherited from clang::ValueStmt
const Expr *	getExprStmt () const
Expr *	getExprStmt ()
Public Member Functions inherited from clang::Stmt
void *	operator new (size_t bytes, const ASTContext &C, unsigned alignment=8)
void *	operator new (size_t bytes, const ASTContext *C, unsigned alignment=8)
void *	operator new (size_t bytes, void *mem) noexcept
void	operator delete (void *, const ASTContext &, unsigned) noexcept
void	operator delete (void , const ASTContext , unsigned) noexcept
void	operator delete (void *, size_t) noexcept
void	operator delete (void , void ) noexcept
	Stmt ()=delete
	Stmt (const Stmt &)=delete
	Stmt (Stmt &&)=delete
Stmt &	operator= (const Stmt &)=delete
Stmt &	operator= (Stmt &&)=delete
	Stmt (StmtClass SC)
StmtClass	getStmtClass () const
const char *	getStmtClassName () const
SourceRange	getSourceRange () const LLVM_READONLY
	SourceLocation tokens are not useful in isolation - they are low level value objects created/interpreted by SourceManager.
SourceLocation	getBeginLoc () const LLVM_READONLY
SourceLocation	getEndLoc () const LLVM_READONLY
void	dump () const
	Dumps the specified AST fragment and all subtrees to `llvm::errs()`.
void	dump (raw_ostream &OS, const ASTContext &Context) const
int64_t	getID (const ASTContext &Context) const
void	dumpColor () const
	dumpColor - same as dump(), but forces color highlighting.
void	dumpPretty (const ASTContext &Context) const
	dumpPretty/printPretty - These two methods do a "pretty print" of the AST back to its original source language syntax.
void	printPretty (raw_ostream &OS, PrinterHelper Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\n", const ASTContext Context=nullptr) const
void	printPrettyControlled (raw_ostream &OS, PrinterHelper Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\n", const ASTContext Context=nullptr) const
void	printJson (raw_ostream &Out, PrinterHelper *Helper, const PrintingPolicy &Policy, bool AddQuotes) const
	Pretty-prints in JSON format.
void	viewAST () const
	viewAST - Visualize an AST rooted at this Stmt* using GraphViz.
Stmt *	IgnoreContainers (bool IgnoreCaptured=false)
	Skip no-op (attributed, compound) container stmts and skip captured stmt at the top, if IgnoreCaptured is true.
const Stmt *	IgnoreContainers (bool IgnoreCaptured=false) const
const Stmt *	stripLabelLikeStatements () const
	Strip off all label-like statements.
Stmt *	stripLabelLikeStatements ()
child_range	children ()
const_child_range	children () const
child_iterator	child_begin ()
child_iterator	child_end ()
const_child_iterator	child_begin () const
const_child_iterator	child_end () const
void	Profile (llvm::FoldingSetNodeID &ID, const ASTContext &Context, bool Canonical, bool ProfileLambdaExpr=false) const
	Produce a unique representation of the given statement.
void	ProcessODRHash (llvm::FoldingSetNodeID &ID, ODRHash &Hash) const
	Calculate a unique representation for a statement that is stable across compiler invocations.

Static Public Member Functions
static std::pair< const NamedDecl , const WarnUnusedResultAttr >	getUnusedResultAttrImpl (const Decl *Callee, QualType ReturnType)
	Returns the WarnUnusedResultAttr that is declared on the callee or its return type declaration, together with a NamedDecl that refers to the declaration the attribute is attached to.
static ExprValueKind	getValueKindForType (QualType T)
	getValueKindForType - Given a formal return or parameter type, give its value kind.
static bool	isPotentialConstantExpr (const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags)
	isPotentialConstantExpr - Return true if this function's definition might be usable in a constant expression in C++11, if it were marked constexpr.
static bool	isPotentialConstantExprUnevaluated (Expr E, const FunctionDecl FD, SmallVectorImpl< PartialDiagnosticAt > &Diags)
	isPotentialConstantExprUnevaluated - Return true if this expression might be usable in a constant expression in C++11 in an unevaluated context, if it were in function FD marked constexpr.
static QualType	findBoundMemberType (const Expr *expr)
	Given an expression of bound-member type, find the type of the member.
static bool	hasAnyTypeDependentArguments (ArrayRef< Expr * > Exprs)
	hasAnyTypeDependentArguments - Determines if any of the expressions in Exprs is type-dependent.
static bool	isSameComparisonOperand (const Expr E1, const Expr E2)
	Checks that the two Expr's will refer to the same value as a comparison operand.
static bool	classof (const Stmt *T)
Static Public Member Functions inherited from clang::ValueStmt
static bool	classof (const Stmt *T)
Static Public Member Functions inherited from clang::Stmt
static void	addStmtClass (const StmtClass s)
static void	EnableStatistics ()
static void	PrintStats ()
static Likelihood	getLikelihood (ArrayRef< const Attr * > Attrs)
static Likelihood	getLikelihood (const Stmt *S)
static const Attr *	getLikelihoodAttr (const Stmt *S)
static Likelihood	getLikelihood (const Stmt Then, const Stmt Else)
static std::tuple< bool, const Attr , const Attr >	determineLikelihoodConflict (const Stmt Then, const Stmt Else)

Protected Member Functions
	Expr (StmtClass SC, QualType T, ExprValueKind VK, ExprObjectKind OK)
	Expr (StmtClass SC, EmptyShell)
	Construct an empty expression.
void	setDependence (ExprDependence Deps)
	Each concrete expr subclass is expected to compute its dependence and call this in the constructor.
Protected Member Functions inherited from clang::ValueStmt
	Stmt (StmtClass SC, EmptyShell)
	Construct an empty statement.
	Stmt ()=delete
	Stmt (const Stmt &)=delete
	Stmt (Stmt &&)=delete
	Stmt (StmtClass SC)
Protected Member Functions inherited from clang::Stmt
void *	operator new (size_t bytes) noexcept
void	operator delete (void *data) noexcept
	Stmt (StmtClass SC, EmptyShell)
	Construct an empty statement.

Friends
class	ASTImporter
class	ASTStmtReader

Additional Inherited Members
Protected Types inherited from clang::Stmt
enum	{ NumExprBits = NumStmtBits + 5 + llvm::BitWidth<ExprDependence> }
enum	{ NumCallExprBits = 25 }
enum	{ NumOverloadExprBits = NumExprBits + 1 }
template<typename T>
using	ConstCastIterator = CastIterator<T, const T const, const Stmt const>
	Const iterator for iterating over Stmt * arrays that contain only T *.
using	ExprIterator = CastIterator<Expr>
using	ConstExprIterator = ConstCastIterator<Expr>
Protected Attributes inherited from clang::Stmt
union {
StmtBitfields StmtBits
NullStmtBitfields NullStmtBits
CompoundStmtBitfields CompoundStmtBits
LabelStmtBitfields LabelStmtBits
AttributedStmtBitfields AttributedStmtBits
IfStmtBitfields IfStmtBits
SwitchStmtBitfields SwitchStmtBits
WhileStmtBitfields WhileStmtBits
DoStmtBitfields DoStmtBits
ForStmtBitfields ForStmtBits
GotoStmtBitfields GotoStmtBits
LoopControlStmtBitfields LoopControlStmtBits
ReturnStmtBitfields ReturnStmtBits
SwitchCaseBitfields SwitchCaseBits
ExprBitfields ExprBits
ConstantExprBitfields ConstantExprBits
PredefinedExprBitfields PredefinedExprBits
DeclRefExprBitfields DeclRefExprBits
FloatingLiteralBitfields FloatingLiteralBits
StringLiteralBitfields StringLiteralBits
CharacterLiteralBitfields CharacterLiteralBits
UnaryOperatorBitfields UnaryOperatorBits
UnaryExprOrTypeTraitExprBitfields UnaryExprOrTypeTraitExprBits
ArrayOrMatrixSubscriptExprBitfields ArrayOrMatrixSubscriptExprBits
CallExprBitfields CallExprBits
MemberExprBitfields MemberExprBits
CastExprBitfields CastExprBits
BinaryOperatorBitfields BinaryOperatorBits
InitListExprBitfields InitListExprBits
ParenListExprBitfields ParenListExprBits
GenericSelectionExprBitfields GenericSelectionExprBits
PseudoObjectExprBitfields PseudoObjectExprBits
SourceLocExprBitfields SourceLocExprBits
ParenExprBitfields ParenExprBits
ShuffleVectorExprBitfields ShuffleVectorExprBits
StmtExprBitfields StmtExprBits
ChooseExprBitfields ChooseExprBits
CXXOperatorCallExprBitfields CXXOperatorCallExprBits
CXXRewrittenBinaryOperatorBitfields CXXRewrittenBinaryOperatorBits
CXXBoolLiteralExprBitfields CXXBoolLiteralExprBits
CXXNullPtrLiteralExprBitfields CXXNullPtrLiteralExprBits
CXXThisExprBitfields CXXThisExprBits
CXXThrowExprBitfields CXXThrowExprBits
CXXDefaultArgExprBitfields CXXDefaultArgExprBits
CXXDefaultInitExprBitfields CXXDefaultInitExprBits
CXXScalarValueInitExprBitfields CXXScalarValueInitExprBits
CXXNewExprBitfields CXXNewExprBits
CXXDeleteExprBitfields CXXDeleteExprBits
TypeTraitExprBitfields TypeTraitExprBits
DependentScopeDeclRefExprBitfields DependentScopeDeclRefExprBits
CXXConstructExprBitfields CXXConstructExprBits
ExprWithCleanupsBitfields ExprWithCleanupsBits
CXXUnresolvedConstructExprBitfields CXXUnresolvedConstructExprBits
CXXDependentScopeMemberExprBitfields CXXDependentScopeMemberExprBits
OverloadExprBitfields OverloadExprBits
UnresolvedLookupExprBitfields UnresolvedLookupExprBits
UnresolvedMemberExprBitfields UnresolvedMemberExprBits
CXXNoexceptExprBitfields CXXNoexceptExprBits
SubstNonTypeTemplateParmExprBitfields SubstNonTypeTemplateParmExprBits
LambdaExprBitfields LambdaExprBits
RequiresExprBitfields RequiresExprBits
ArrayTypeTraitExprBitfields ArrayTypeTraitExprBits
ExpressionTraitExprBitfields ExpressionTraitExprBits
CXXFoldExprBitfields CXXFoldExprBits
PackIndexingExprBitfields PackIndexingExprBits
CoawaitExprBitfields CoawaitBits
ObjCIndirectCopyRestoreExprBitfields ObjCIndirectCopyRestoreExprBits
OpaqueValueExprBitfields OpaqueValueExprBits
ConvertVectorExprBitfields ConvertVectorExprBits
};

Detailed Description

This represents one expression.

Note that Expr's are subclasses of Stmt. This allows an expression to be transparently used any place a Stmt is required.

Definition at line 112 of file Expr.h.

Member Enumeration Documentation

◆ ConstantExprKind

enum class clang::Expr::ConstantExprKind

strong

Enumerator
Normal	An integer constant expression (an array bound, enumerator, case value, bit-field width, or similar) or similar.
NonClassTemplateArgument	A non-class template argument. Such a value is only used for mangling, not for code generation, so can refer to dllimported functions.
ClassTemplateArgument	A class template argument. Such a value is used for code generation.
ImmediateInvocation	An immediate invocation. The destruction of the end result of this evaluation is not part of the evaluation, but all other temporaries are destroyed.

Definition at line 749 of file Expr.h.

◆ isModifiableLvalueResult

enum clang::Expr::isModifiableLvalueResult

Enumerator
MLV_Valid
MLV_NotObjectType
MLV_IncompleteVoidType
MLV_DuplicateVectorComponents
MLV_InvalidExpression
MLV_LValueCast
MLV_IncompleteType
MLV_ConstQualified
MLV_ConstQualifiedField
MLV_ConstAddrSpace
MLV_ArrayType
MLV_NoSetterProperty
MLV_MemberFunction
MLV_SubObjCPropertySetting
MLV_InvalidMessageExpression
MLV_ClassTemporary
MLV_ArrayTemporary

Definition at line 304 of file Expr.h.

◆ LValueClassification

enum clang::Expr::LValueClassification

Enumerator
LV_Valid
LV_NotObjectType
LV_IncompleteVoidType
LV_DuplicateVectorComponents
LV_InvalidExpression
LV_InvalidMessageExpression
LV_MemberFunction
LV_SubObjCPropertySetting
LV_ClassTemporary
LV_ArrayTemporary

Definition at line 289 of file Expr.h.

◆ NullPointerConstantKind

enum clang::Expr::NullPointerConstantKind

Enumeration used to describe the kind of Null pointer constant returned from isNullPointerConstant().

Enumerator
NPCK_NotNull	Expression is not a Null pointer constant.
NPCK_ZeroExpression	Expression is a Null pointer constant built from a zero integer expression that is not a simple, possibly parenthesized, zero literal. C++ Core Issue 903 will classify these expressions as "not pointers" once it is adopted. http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#903
NPCK_ZeroLiteral	Expression is a Null pointer constant built from a literal zero.
NPCK_CXX11_nullptr	Expression is a C++11 nullptr.
NPCK_GNUNull	Expression is a GNU-style __null constant.

Definition at line 802 of file Expr.h.

◆ NullPointerConstantValueDependence

enum clang::Expr::NullPointerConstantValueDependence

Enumeration used to describe how isNullPointerConstant() should cope with value-dependent expressions.

Enumerator
NPC_NeverValueDependent	Specifies that the expression should never be value-dependent.
NPC_ValueDependentIsNull	Specifies that a value-dependent expression of integral or dependent type should be considered a null pointer constant.
NPC_ValueDependentIsNotNull	Specifies that a value-dependent expression should be considered to never be a null pointer constant.

Definition at line 825 of file Expr.h.

◆ SideEffectsKind

enum clang::Expr::SideEffectsKind

Enumerator
SE_NoSideEffects	Strictly evaluate the expression.
SE_AllowUndefinedBehavior	Allow UB that we can give a value, but not arbitrary unmodeled side effects.
SE_AllowSideEffects	Allow any unmodeled side effect.

Definition at line 670 of file Expr.h.

Constructor & Destructor Documentation

◆ Expr() [1/5]

clang::Expr::Expr ( )

delete

◆ Expr() [2/5]

clang::Expr::Expr ( const Expr & )

delete

References Expr().

◆ Expr() [3/5]

clang::Expr::Expr ( Expr && )

delete

References Expr().

◆ Expr() [4/5]

clang::Expr::Expr	(	StmtClass	SC,
		QualType	T,
		ExprValueKind	VK,
		ExprObjectKind	OK )

inlineprotected

Definition at line 123 of file Expr.h.

References clang::Stmt::ExprBits, setType(), and clang::T.

◆ Expr() [5/5]

clang::Expr::Expr	(	StmtClass	SC,
		EmptyShell	)

inlineexplicitprotected

Construct an empty expression.

Definition at line 133 of file Expr.h.

Member Function Documentation

◆ Classify()

Classification clang::Expr::Classify ( ASTContext & Ctx ) const

inline

Classify - Classify this expression according to the C++11 expression taxonomy.

C++11 defines ([basic.lval]) a new taxonomy of expressions to replace the old lvalue vs rvalue. This function determines the type of expression this is. There are three expression types:

lvalues are classical lvalues as in C++03.
prvalues are equivalent to rvalues in C++03.
xvalues are expressions yielding unnamed rvalue references, e.g. a function returning an rvalue reference. lvalues and xvalues are collectively referred to as glvalues, while prvalues and xvalues together form rvalues.

Definition at line 412 of file Expr.h.

Referenced by clang::Sema::AddConversionCandidate(), clang::Sema::AddFunctionCandidates(), AddTemplateConversionCandidateImmediately(), clang::Sema::BuildCallToMemberFunction(), clang::Sema::CheckPointerToMemberOperands(), ClassifyLValue(), isTemporaryObject(), clang::Sema::LookupSpecialMember(), LookupSpecialMemberFromXValue(), and clang::Sema::PerformImplicitObjectArgumentInitialization().

◆ ClassifyLValue()

Expr::LValueClassification Expr::ClassifyLValue ( ASTContext & Ctx ) const

Reasons why an expression might not be an l-value.

Definition at line 729 of file ExprClassification.cpp.

Referenced by clang::Sema::CheckAddressOfOperand(), and isBoundMemberFunction().

◆ ClassifyModifiable()

Classification clang::Expr::ClassifyModifiable	(	ASTContext &	Ctx,
		SourceLocation &	Loc ) const

inline

ClassifyModifiable - Classify this expression according to the C++11 expression taxonomy, and see if it is valid on the left side of an assignment.

This function extends classify in that it also tests whether the expression is modifiable (C99 6.3.2.1p1).

Parameters

Loc	A source location that might be filled with a relevant location if the expression is not modifiable.

Definition at line 424 of file Expr.h.

Referenced by isModifiableLvalue().

◆ classof()

bool clang::Expr::classof ( const Stmt * T )

inlinestatic

Definition at line 1031 of file Expr.h.

References clang::ValueStmt::Stmt(), and clang::T.

◆ containsErrors()

bool clang::Expr::containsErrors ( ) const

inline

Whether this expression contains subexpressions which had errors.

Definition at line 246 of file Expr.h.

References getDependence().

Referenced by clang::Sema::ActOnCapScopeReturnStmt(), clang::SemaOpenMP::ActOnOpenMPTileDirective(), clang::SemaOpenMP::ActOnOpenMPUnrollDirective(), clang::Sema::ActOnPackIndexingExpr(), clang::Sema::BuildBinOp(), clang::Sema::BuildCXXForRangeStmt(), clang::Sema::BuildDelegatingInitializer(), BuiltinFunctionStart(), calculateConstraintSatisfaction(), clang::Sema::checkCall(), clang::Sema::CheckConditionalOperands(), clang::Sema::CheckEnumConstant(), checkOpenMPLoop(), clang::Sema::CheckPlaceholderExpr(), clang::SemaOpenACC::CheckVarIsPointerType(), clang::Sema::DiagnoseTypeTraitDetails(), EvaluateDependentExpr(), clang::Sema::FinalizeVarWithDestructor(), clang::Sema::getNamedReturnInfo(), isNullPointerConstant(), and clang::Sema::VerifyBitField().

◆ containsUnexpandedParameterPack()

bool clang::Expr::containsUnexpandedParameterPack ( ) const

inline

Whether this expression contains an unexpanded parameter pack (for C++11 variadic templates).

Given the following function template:

template<typename F, typename ...Types>
void forward(const F &f, Types &&...args) {
  f(static_cast<Types&&>(args)...);
}

The expressions args and static_cast<Types&&>(args) both contain parameter packs.

Definition at line 241 of file Expr.h.

References getDependence().

◆ EvaluateAsBooleanCondition()

bool Expr::EvaluateAsBooleanCondition	(	bool &	Result,
		const ASTContext &	Ctx,
		bool	InConstantContext = false ) const

EvaluateAsBooleanCondition - Return true if this is a constant which we can fold and convert to a boolean condition using any crazy technique that we want to, even if the expression has side-effects.

Definition at line 17764 of file ExprConstant.cpp.

References EvaluateAsRValue(), HandleConversionToBool(), isValueDependent(), and clang::Result.

Referenced by CheckNonNullExpr(), emitAtomicOp(), FindTypeTagExpr(), getNumThreads(), and clang::CallExpr::isBuiltinAssumeFalse().

◆ EvaluateAsConstantExpr()

bool Expr::EvaluateAsConstantExpr	(	EvalResult &	Result,
		const ASTContext &	Ctx,
		ConstantExprKind	Kind = ConstantExprKind::Normal ) const

Evaluate an expression that is required to be a constant expression.

Does not check the syntactic constraints for C and C++98 constant expressions.

Definition at line 17873 of file ExprConstant.cpp.

References CheckConstantExpression(), CheckMemoryLeaks(), clang::ConstantExpression, clang::interp::Context::evaluate(), EvaluateDestruction(), EvaluateInPlace(), Expr(), FastEvaluateAsRValue(), clang::Stmt::getBeginLoc(), getExprLoc(), clang::ASTContext::getInterpContext(), getType(), isValueDependent(), clang::Result, and clang::T.

Referenced by calculateConstraintSatisfaction(), clang::Sema::CheckForImmediateInvocation(), clang::computeDependence(), clang::Sema::ConstantFoldAttrArgs(), EvaluateAndDiagnoseImmediateInvocation(), clang::Sema::EvaluateConvertedConstantExpression(), getAsBuiltinConstantDeclRef(), and clang::processConstant32BitIntArgument().

◆ EvaluateAsFixedPoint()

bool Expr::EvaluateAsFixedPoint	(	EvalResult &	Result,
		const ASTContext &	Ctx,
		SideEffectsKind	AllowSideEffects = SE_NoSideEffects,
		bool	InConstantContext = false ) const

EvaluateAsFixedPoint - Return true if this is a constant which we can fold and convert to a fixed point value.

Definition at line 17785 of file ExprConstant.cpp.

References clang::IgnoreSideEffects, isValueDependent(), and clang::Result.

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

◆ EvaluateAsFloat()

bool Expr::EvaluateAsFloat	(	llvm::APFloat &	Result,
		const ASTContext &	Ctx,
		SideEffectsKind	AllowSideEffects = SE_NoSideEffects,
		bool	InConstantContext = false ) const

EvaluateAsFloat - Return true if this is a constant which we can fold and convert to a floating point value, using any crazy technique that we want to.

Definition at line 17796 of file ExprConstant.cpp.

References EvaluateAsRValue(), getType(), hasUnacceptableSideEffect(), isValueDependent(), and clang::Result.

Referenced by DiagnoseFloatingImpCast(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), and clang::CIRGen::CIRGenFunction::emitBuiltinExpr().

◆ EvaluateAsInitializer()

bool Expr::EvaluateAsInitializer	(	APValue &	Result,
		const ASTContext &	Ctx,
		const VarDecl *	VD,
		SmallVectorImpl< PartialDiagnosticAt > &	Notes,
		bool	IsConstantInitializer ) const

EvaluateAsInitializer - Evaluate an expression as if it were the initializer of the given declaration.

Returns true if the initializer can be folded to a constant, and produces any relevant notes. In C++11, notes will be produced if the expression is not a constant expression.

Definition at line 17940 of file ExprConstant.cpp.

References CheckConstantExpression(), CheckMemoryLeaks(), clang::ConstantExpression, clang::ConstantFold, clang::Expr::EvalStatus::Diag, EvaluateInPlace(), clang::ASTContext::getLangOpts(), clang::Decl::getLocation(), clang::ValueDecl::getType(), isValueDependent(), and clang::NamedDecl::printQualifiedName().

◆ EvaluateAsInt()

bool Expr::EvaluateAsInt	(	EvalResult &	Result,
		const ASTContext &	Ctx,
		SideEffectsKind	AllowSideEffects = SE_NoSideEffects,
		bool	InConstantContext = false ) const

EvaluateAsInt - Return true if this is a constant which we can fold and convert to an integer, using any crazy technique that we want to.

Definition at line 17774 of file ExprConstant.cpp.

References clang::IgnoreSideEffects, isValueDependent(), and clang::Result.

Referenced by clang::SemaOpenACC::ActOnArraySectionExpr(), clang::Sema::ActOnFinishSwitchStmt(), clang::SemaOpenMP::ActOnOMPArraySectionExpr(), clang::SemaOpenMP::ActOnOpenMPDeviceNum(), AnalyzeBitFieldAssignment(), areEqualIntegers(), BuiltinAlignment(), checkArrayExpressionDoesNotReferToWholeSize(), clang::SemaAMDGPU::checkCoopAtomicFunctionCall(), checkFormatStringExpr(), clang::CodeGen::CodeGenFunction::checkIfLoopMustProgress(), clang::Sema::CheckImplicitConversion(), clang::Sema::CheckLogicalOperands(), CheckObjCDictionaryLiteralDuplicateKeys(), checkOpenMPLoop(), checkSimdlenSafelenSpecified(), clang::Sema::CheckSubtractionOperands(), CheckUnicodeArithmeticConversions(), clang::CIRGen::CIRGenFunction::constantFoldsToSimpleInteger(), DiagnoseBadDivideOrRemainderValues(), DiagnoseBadShiftValues(), DiagnoseIntInBoolContext(), DiagnoseMixedUnicodeImplicitConversion(), clang::CodeGen::CodeGenFunction::EmitAArch64BuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitARMBuiltinExpr(), emitAtomicCmpXchgFailureSet(), clang::CIRGen::CIRGenFunction::emitAtomicExpr(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitOMPWorksharingLoop(), clang::CallExpr::evaluateBytesReturnedByAllocSizeCall(), clang::ento::SValBuilder::getConstantVal(), getIntegerConstantExpr(), isConstantInitializer(), isSafeArraySubscript(), TryToFixInvalidVariablyModifiedType(), and clang::ento::ExprEngine::VisitOffsetOfExpr().

◆ EvaluateAsLValue()

bool Expr::EvaluateAsLValue	(	EvalResult &	Result,
		const ASTContext &	Ctx,
		bool	InConstantContext = false ) const

EvaluateAsLValue - Evaluate an expression to see if we can fold it to an lvalue with link time known address, with no side-effects.

Definition at line 17816 of file ExprConstant.cpp.

References CheckLValueConstantExpression(), clang::ConstantFold, clang::interp::Context::evaluate(), EvaluateLValue(), getExprLoc(), clang::ASTContext::getInterpContext(), clang::ASTContext::getLValueReferenceType(), getType(), isValueDependent(), and clang::Result.

Referenced by clang::Sema::FillInlineAsmIdentifierInfo(), isConstantInitializer(), clang::CodeGen::CodeGenFunction::tryEmitAsConstant(), clang::CIRGen::ConstantEmitter::tryEmitPrivate(), and clang::CodeGen::ConstantEmitter::tryEmitPrivate().

◆ EvaluateAsRValue()

bool Expr::EvaluateAsRValue	(	EvalResult &	Result,
		const ASTContext &	Ctx,
		bool	InConstantContext = false ) const

EvaluateAsRValue - Return true if this is a constant which we can fold to an rvalue using any crazy technique (that has nothing to do with language standards) that we want to, even if the expression has side-effects.

EvaluateAsRValue - Return true if this is a constant which we can fold using any crazy technique (that has nothing to do with language standards) that we want to. If this function returns true, it returns the folded constant in Result. If this expression is a glvalue, an lvalue-to-rvalue conversion will be applied to the result.

If this function returns true, it returns the folded constant in Result. If the expression is a glvalue, an lvalue-to-rvalue conversion will be applied.

Definition at line 17754 of file ExprConstant.cpp.

References clang::IgnoreSideEffects, isValueDependent(), and clang::Result.

Referenced by clang::Sema::ActOnGCCAsmStmt(), clang::Sema::CheckImplicitConversion(), clang::Sema::DiagnoseStaticAssertDetails(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CIRGen::CIRGenFunction::emitBuiltinExpr(), EvaluateForOverflow(), clang::Sema::FillInlineAsmIdentifierInfo(), findConstantBaseAndOffset(), isNullPointerValueTemplateArgument(), maybeConstEvalStringLiteral(), clang::InitializationSequence::Perform(), clang::CIRGen::CIRGenFunction::tryEmitAsConstant(), clang::CodeGen::CodeGenFunction::tryEmitAsConstant(), clang::CIRGen::ConstantEmitter::tryEmitPrivate(), clang::CodeGen::ConstantEmitter::tryEmitPrivate(), TryGetExprRange(), and clang::Sema::VerifyIntegerConstantExpression().

◆ EvaluateCharRangeAsString() [1/2]

bool Expr::EvaluateCharRangeAsString	(	APValue &	Result,
		const Expr *	SizeExpression,
		const Expr *	PtrExpression,
		ASTContext &	Ctx,
		EvalResult &	Status ) const

Definition at line 18983 of file ExprConstant.cpp.

References EvaluateCharRangeAsStringImpl(), Expr(), and clang::Result.

◆ EvaluateCharRangeAsString() [2/2]

bool Expr::EvaluateCharRangeAsString	(	std::string &	Result,
		const Expr *	SizeExpression,
		const Expr *	PtrExpression,
		ASTContext &	Ctx,
		EvalResult &	Status ) const

Definition at line 18975 of file ExprConstant.cpp.

References EvaluateCharRangeAsStringImpl(), Expr(), and clang::Result.

◆ EvaluateForOverflow()

void Expr::EvaluateForOverflow ( const ASTContext & Ctx ) const

Definition at line 18086 of file ExprConstant.cpp.

References EvaluateAsRValue(), FastEvaluateAsRValue(), clang::IgnoreSideEffects, and isValueDependent().

◆ EvaluateKnownConstInt()

APSInt Expr::EvaluateKnownConstInt ( const ASTContext & Ctx ) const

EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded integer.

This must be called on an expression that constant folds to an integer.

Definition at line 18049 of file ExprConstant.cpp.

References EvaluateAsRValue(), clang::IgnoreSideEffects, isValueDependent(), and clang::Result.

Referenced by clang::Sema::ActOnFinishSwitchStmt(), clang::SemaOpenMP::ActOnOpenMPCriticalDirective(), CheckICE(), clang::CodeGen::CodeGenFunction::EmitAArch64BuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CIRGen::CIRGenFunction::emitBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitCaseStmt(), clang::CodeGen::CodeGenFunction::EmitCaseStmtRange(), clang::CodeGen::CGOpenMPRuntime::emitDeclareSimdFunction(), EvaluateSwitch(), FindCaseStatementsForValue(), clang::IfStmt::getNondiscardedCase(), handleLoopHintAttr(), isNullPointerConstant(), IsStandardConversion(), clang::ento::ExprEngine::processSwitch(), shouldAddCase(), templateArgumentExpressionsEqual(), and clang::ento::ExprEngine::VisitUnaryExprOrTypeTraitExpr().

◆ EvaluateKnownConstIntCheckOverflow()

APSInt Expr::EvaluateKnownConstIntCheckOverflow	(	const ASTContext &	Ctx,
		SmallVectorImpl< PartialDiagnosticAt > *	Diag = nullptr ) const

Definition at line 18066 of file ExprConstant.cpp.

References Diag(), EvaluateAsRValue(), clang::IgnoreSideEffects, isValueDependent(), and clang::Result.

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

◆ EvaluateWithSubstitution()

bool Expr::EvaluateWithSubstitution	(	APValue &	Value,
		ASTContext &	Ctx,
		const FunctionDecl *	Callee,
		ArrayRef< const Expr * >	Args,
		const Expr *	This = nullptr ) const

EvaluateWithSubstitution - Evaluate an expression as if from the context of a call to the given function with the given arguments, inside an unevaluated context.

Returns true if the expression could be folded to a constant.

Definition at line 18679 of file ExprConstant.cpp.

References clang::APValue, clang::Call, clang::ConstantExpressionUnevaluated, Evaluate(), EvaluateCallArg(), EvaluateObjectArgument(), Expr(), clang::ASTContext::getPrintingPolicy(), clang::Expr::EvalStatus::HasSideEffects, and isValueDependent().

◆ findBoundMemberType()

QualType Expr::findBoundMemberType ( const Expr * expr )

static

Given an expression of bound-member type, find the type of the member.

Returns null if this is an overloaded bound member expression.

Definition at line 3041 of file Expr.cpp.

References Expr(), clang::ast_matchers::expr, getPointeeType(), clang::isa(), and clang::ast_matchers::type.

Referenced by clang::CallExpr::getCallReturnType().

◆ getAsBuiltinConstantDeclRef()

const ValueDecl * Expr::getAsBuiltinConstantDeclRef ( const ASTContext & Context ) const

If this expression is an unambiguous reference to a single declaration, in the style of __builtin_function_start, return that declaration.

Note that this may return a non-static member function or field in C++ if this expression is a member pointer constant.

Definition at line 222 of file Expr.cpp.

References EvaluateAsConstantExpr(), and clang::Expr::EvalResult::Val.

Referenced by BuiltinFunctionStart(), and clang::CodeGen::CodeGenFunction::EmitBuiltinExpr().

◆ getBestDynamicClassType()

const CXXRecordDecl * Expr::getBestDynamicClassType ( ) const

For an expression of class type or pointer to class type, return the most derived class decl the expression is known to refer to.

If this expression is a cast, this method looks through it to find the most derived decl that can be inferred from the expression. This is valid because derived-to-base conversions have undefined behavior if the object isn't dynamically of the derived type.

Definition at line 68 of file Expr.cpp.

References clang::Type::castAsCXXRecordDecl(), Expr(), clang::Type::getAs(), getBestDynamicClassTypeExpr(), clang::Type::getPointeeType(), getType(), and clang::Type::isDependentType().

◆ getBestDynamicClassTypeExpr()

const Expr * Expr::getBestDynamicClassTypeExpr ( ) const

Get the inner expression that determines the best dynamic class.

If this is a prvalue, we guarantee that it is of the most-derived type for the object itself.

Definition at line 43 of file Expr.cpp.

References Expr(), and IgnoreParenBaseCasts().

Referenced by getBestDynamicClassType().

◆ getDependence()

ExprDependence clang::Expr::getDependence ( ) const

inline

Definition at line 164 of file Expr.h.

References clang::Stmt::ExprBits.

◆ getEnumCoercedType()

QualType Expr::getEnumCoercedType ( const ASTContext & Ctx ) const

If this expression is an enumeration constant, return the enumeration type under which said constant was declared.

Otherwise return the expression's type. Note this effectively circumvents the weak typing of C's enum constants

Definition at line 262 of file Expr.cpp.

References clang::cast(), clang::ASTContext::getCanonicalTagType(), getEnumConstantDecl(), getType(), and clang::isa().

Referenced by checkBuiltinVectorMathMixedEnums(), clang::Sema::checkEnumArithmeticConversions(), and clang::Sema::CheckImplicitConversion().

◆ getEnumConstantDecl() [1/2]

EnumConstantDecl * Expr::getEnumConstantDecl ( )

If this expression refers to an enum constant, retrieve its declaration.

Definition at line 4252 of file Expr.cpp.

References Expr(), and IgnoreParenImpCasts().

Referenced by getEnumCoercedType(), and getEnumConstantDecl().

◆ getEnumConstantDecl() [2/2]

const EnumConstantDecl * clang::Expr::getEnumConstantDecl ( ) const

inline

Definition at line 490 of file Expr.h.

References Expr(), and getEnumConstantDecl().

◆ getExprLoc()

SourceLocation Expr::getExprLoc ( ) const

getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic expression.

Definition at line 273 of file Expr.cpp.

References clang::Stmt::getStmtClass(), and clang::Stmt::NoStmtClass.

◆ getFPFeaturesInEffect()

FPOptions Expr::getFPFeaturesInEffect ( const LangOptions & LO ) const

Returns the set of floating point options that apply to this expression.

Only meaningful for operations on floating point values.

Definition at line 3963 of file Expr.cpp.

References clang::Call, and clang::FPOptions::defaultWithoutTrailingStorage().

Referenced by clang::CodeGen::CodeGenFunction::CGFPOptionsRAII::CGFPOptionsRAII(), checkFloatingPointResult(), and getActiveRoundingMode().

◆ getIntegerConstantExpr()

std::optional< llvm::APSInt > Expr::getIntegerConstantExpr ( const ASTContext & Ctx ) const

isIntegerConstantExpr - Return the value if this expression is a valid integer constant expression.

If not a valid i-c-e, return std::nullopt.

Note: This does not perform the implicit conversions required by C++11 [expr.const]p5.

Definition at line 18610 of file ExprConstant.cpp.

References EvaluateAsInt(), EvaluateCPlusPlus11IntegralConstantExpr(), clang::ASTContext::getLangOpts(), clang::IgnoreSideEffects, isIntegerConstantExpr(), isValueDependent(), and SE_AllowSideEffects.

Referenced by clang::Sema::ActOnEffectExpression(), clang::SemaOpenMP::ActOnOMPIteratorExpr(), clang::SemaOpenMP::ActOnOpenMPDistScheduleClause(), clang::SemaOpenMP::ActOnOpenMPLinearClause(), clang::SemaOpenMP::ActOnOpenMPScheduleClause(), clang::Sema::ActOnPragmaPack(), clang::Sema::AddAssumeAlignedAttr(), AnalyzeComparison(), BuildAddressSpaceIndex(), clang::Sema::BuildExtVectorType(), clang::Sema::BuildMatrixType(), clang::Sema::BuildVectorType(), clang::Sema::BuiltinConstantArg(), clang::Sema::BuiltinShuffleVector(), clang::SemaARM::CheckARMCoprocessorImmediate(), clang::SemaBPF::CheckBPFBuiltinFunctionCall(), clang::SemaHLSL::CheckBuiltinFunctionCall(), clang::SemaOpenACC::CheckCollapseLoopCount(), clang::Sema::checkConstantPointerAuthKey(), clang::Sema::checkFunctionOrMethodParameterIndex(), clang::Sema::CheckImplicitConversion(), clang::Sema::checkPointerAuthDiscriminatorArg(), clang::SemaPPC::CheckPPCBuiltinFunctionCall(), clang::SemaSystemZ::CheckSystemZBuiltinFunctionCall(), clang::SemaOpenACC::CheckTileSizeExpr(), clang::Sema::checkUInt32Argument(), clang::Sema::CreateBuiltinArraySubscriptExpr(), clang::Sema::CreateBuiltinMatrixSubscriptExpr(), DeduceTemplateArgumentsByTypeMatch(), clang::Sema::DiagnoseAssignmentEnum(), clang::CodeGen::CodeGenFunction::EmitAArch64BuiltinExpr(), EmitAArch64TblBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitARMBuiltinExpr(), clang::CIRGen::CIRGenFunction::emitBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitCommonNeonBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitNVPTXBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitScalarOrConstFoldImmArg(), clang::CodeGen::CodeGenFunction::EmitSystemZBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitWebAssemblyBuiltinExpr(), clang::Sema::FinalizeDeclaration(), fitsInto(), fixUPCAddressofArraySubscriptWithSpan(), clang::CodeGen::CodeGenFunction::GetAArch64SVEProcessedOperands(), getAlignmentAndOffsetFromBinAddOrSub(), getAndVerifyMatrixDimension(), getCommonSugarTypeNode(), GetIntegerConstantValue(), clang::CodeGen::CGOpenMPRuntime::getNumTeamsExprForTargetDirective(), clang::CodeGen::CGOpenMPRuntime::getNumThreadsExprForTargetDirective(), handleHLSLLoopHintAttr(), clang::SemaM68k::handleInterruptAttr(), clang::SemaMSP430::handleInterruptAttr(), handleOpenCLUnrollHint(), handleSentinelAttr(), handleWorkGroupSize(), isNonNegativeIntegerExpr(), isNonNegativeIntegerValue(), isSafeSpanTwoParamConstruct(), makeAttributeArgExpr(), makeLaunchBoundsArgExpr(), clang::ASTContext::mergeTypes(), and sharedInstantiateConstructorDestructorAttr().

◆ getObjCProperty()

const ObjCPropertyRefExpr * Expr::getObjCProperty ( ) const

If this expression is an l-value for an Objective C property, find the underlying property reference expression.

Definition at line 4168 of file Expr.cpp.

References clang::cast(), Expr(), getObjectKind(), IgnoreParenCasts(), isLValue(), and clang::OK_ObjCProperty.

◆ getObjectKind()

ExprObjectKind clang::Expr::getObjectKind ( ) const

inline

getObjectKind - The object kind that this expression produces.

Object kinds are meaningful only for expressions that yield an l-value or x-value.

Definition at line 451 of file Expr.h.

References clang::Stmt::ExprBits.

◆ getReferencedDeclOfCallee() [1/2]

Decl * Expr::getReferencedDeclOfCallee ( )

Definition at line 1542 of file Expr.cpp.

References Expr(), IgnoreImpCasts(), IgnoreParenImpCasts(), and IgnoreParens().

Referenced by CheckSimplerImplicitMovesMSVCWorkaround(), clang::CodeGen::CodeGenFunction::EmitCallee(), clang::CIRGen::CIRGenFunction::emitCallee(), clang::CallExpr::getCalleeDecl(), clang::CallExpr::getCalleeDecl(), getOverflowPatternBinOp(), and getReferencedDeclOfCallee().

◆ getReferencedDeclOfCallee() [2/2]

const Decl * clang::Expr::getReferencedDeclOfCallee ( ) const

inline

Definition at line 499 of file Expr.h.

References Expr(), and getReferencedDeclOfCallee().

◆ getSourceBitField() [1/2]

FieldDecl * Expr::getSourceBitField ( )

If this expression refers to a bit-field, retrieve the declaration of that bit-field.

Note that this returns a non-null pointer in subtly different places than refersToBitField returns true. In particular, this can return a non-null pointer even for r-values loaded from bit-fields, but it will return null for a conditional bit-field.

Definition at line 4205 of file Expr.cpp.

References Expr(), getSourceBitField(), IgnoreParens(), and clang::FieldDecl::isBitField().

Referenced by clang::Sema::ActOnMSAsmStmt(), AnalyzeAssignment(), getSourceBitField(), getSourceBitField(), clang::Sema::IsIntegralPromotion(), isKnownToHaveBooleanValue(), clang::ASTContext::isPromotableBitField(), and TryGetExprRange().

◆ getSourceBitField() [2/2]

const FieldDecl * clang::Expr::getSourceBitField ( ) const

inline

Definition at line 494 of file Expr.h.

References Expr(), and getSourceBitField().

◆ getType()

QualType clang::Expr::getType ( ) const

inline

Definition at line 144 of file Expr.h.

◆ getUnusedResultAttrImpl()

std::pair< const NamedDecl , const WarnUnusedResultAttr > Expr::getUnusedResultAttrImpl	(	const Decl *	Callee,
		QualType	ReturnType )

static

Returns the WarnUnusedResultAttr that is declared on the callee or its return type declaration, together with a NamedDecl that refers to the declaration the attribute is attached to.

Definition at line 1630 of file Expr.cpp.

References clang::TypedefType::desugar(), clang::Type::getAs(), and clang::Type::getAsTagDecl().

Referenced by clang::CallExpr::getUnusedResultAttr(), clang::CXXConstructExpr::getUnusedResultAttr(), and clang::ObjCMessageExpr::getUnusedResultAttr().

◆ getValueKind()

ExprValueKind clang::Expr::getValueKind ( ) const

inline

getValueKind - The value kind that this expression produces.

Definition at line 444 of file Expr.h.

References clang::Stmt::ExprBits.

◆ getValueKindForType()

ExprValueKind clang::Expr::getValueKindForType ( QualType T )

inlinestatic

getValueKindForType - Given a formal return or parameter type, give its value kind.

Definition at line 434 of file Expr.h.

References clang::isa(), clang::T, clang::VK_LValue, clang::VK_PRValue, and clang::VK_XValue.

Referenced by clang::Sema::AddConversionCandidate(), clang::CXXParenListInitExpr::ASTStmtWriter, clang::Sema::BuildCallToMemberFunction(), clang::Sema::BuildCallToObjectOfClassType(), clang::Sema::BuildCXXMemberCallExpr(), clang::Sema::BuildCXXTypeConstructExpr(), clang::Sema::BuildLiteralOperatorCall(), clang::Sema::BuildOverloadedArrowExpr(), clang::Sema::BuildResolvedCallExpr(), CheckConvertibilityForTypeTraits(), clang::SemaObjC::CheckMessageArgumentTypes(), clang::Sema::CreateOverloadedArraySubscriptExpr(), clang::Sema::CreateOverloadedBinOp(), clang::Sema::CreateOverloadedUnaryOp(), DiagnoseNonAssignableReason(), DiagnoseNonConstructibleReason(), EvaluateBinaryTypeTrait(), EvaluateBooleanTypeTrait(), fixOverloadedReinterpretCastExpr(), clang::ASTContext::getInjectedTemplateArg(), and clang::TreeTransform< AdjustConstraintDepth >::RebuildShuffleVectorExpr().

◆ hasAnyTypeDependentArguments()

bool Expr::hasAnyTypeDependentArguments ( ArrayRef< Expr * > Exprs )

static

hasAnyTypeDependentArguments - Determines if any of the expressions in Exprs is type-dependent.

Definition at line 3334 of file Expr.cpp.

References isTypeDependent().

Referenced by clang::Sema::ActOnArraySubscriptExpr(), clang::Sema::BuildCallExpr(), clang::Sema::BuildCXXNew(), clang::Sema::BuildCXXTypeConstructExpr(), clang::Sema::CreateOverloadedArraySubscriptExpr(), clang::Sema::DeduceTemplateSpecializationFromInitializer(), and clang::InitializationSequence::InitializeFrom().

◆ hasNonTrivialCall()

bool Expr::hasNonTrivialCall ( const ASTContext & Ctx ) const

Determine whether this expression involves a call to any function that is not trivial.

Definition at line 4030 of file Expr.cpp.

Referenced by isTrivial().

◆ hasPlaceholderType() [1/2]

bool clang::Expr::hasPlaceholderType ( ) const

inline

Returns whether this expression has a placeholder type.

Definition at line 523 of file Expr.h.

References getType(), and clang::Type::isPlaceholderType().

◆ hasPlaceholderType() [2/2]

bool clang::Expr::hasPlaceholderType ( BuiltinType::Kind K ) const

inline

Returns whether this expression has a specific placeholder type.

Definition at line 528 of file Expr.h.

References getType(), and clang::BuiltinType::isPlaceholderTypeKind().

◆ HasSideEffects()

bool Expr::HasSideEffects	(	const ASTContext &	Ctx,
		bool	IncludePossibleEffects = true ) const

HasSideEffects - This routine returns true for all those expressions which have any effect other than producing a value.

Example is a function call, volatile variable read, or throwing an exception. If IncludePossibleEffects is false, this call treats certain expressions with potential side effects (such as function call-like expressions, instantiation-dependent expressions, or invocations from a macro) as not having side effects.

Definition at line 3665 of file Expr.cpp.

References clang::cast(), clang::Stmt::children(), Expr(), clang::CastExpr::getCastKind(), clang::CXXConstructExpr::getConstructor(), getExprLoc(), clang::FieldDecl::getInClassInitializer(), clang::Stmt::getStmtClass(), clang::CastExpr::getSubExpr(), getType(), clang::ExplicitCastExpr::getTypeAsWritten(), clang::Decl::hasAttr(), HasSideEffects(), clang::Type::isReferenceType(), clang::FunctionDecl::isTrivial(), clang::QualType::isVolatileQualified(), clang::Stmt::NoStmtClass, clang::PseudoObjectExpr::semantics_begin(), clang::PseudoObjectExpr::semantics_end(), and clang::ValueStmt::Stmt().

Referenced by clang::Sema::BuildCXXAssumeExpr(), clang::Sema::BuildCXXTypeId(), clang::Sema::BuildDecltypeType(), clang::Sema::CheckUnaryExprOrTypeTraitOperand(), clang::Sema::CreateGenericSelectionExpr(), clang::CodeGen::CodeGenFunction::EmitAttributedStmt(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CIRGen::CIRGenFunction::emitBuiltinExpr(), clang::CodeGen::CodeGenFunction::GetCountedByFieldExprGEP(), clang::VarDecl::hasInitWithSideEffects(), HasSideEffects(), isBuiltinAssumeWithSideEffects(), isSimpleZero(), isTrivial(), clang::interp::EvalEmitter::speculate(), clang::SemaHLSL::transformInitList(), and clang::interp::Compiler< Emitter >::visitAttributedStmt().

◆ IgnoreCasts() [1/2]

const Expr * clang::Expr::IgnoreCasts ( ) const

inline

Definition at line 882 of file Expr.h.

References Expr(), and IgnoreCasts().

◆ IgnoreCasts() [2/2]

Expr * Expr::IgnoreCasts ( )

Skip past any casts which might surround this expression until reaching a fixed point.

Skips:

Definition at line 3069 of file Expr.cpp.

References Expr(), clang::IgnoreCastsSingleStep(), and clang::IgnoreExprNodes().

Referenced by getBlockExpr(), IgnoreCasts(), and isConfigurationValue().

◆ IgnoreConversionOperatorSingleStep() [1/2]

const Expr * clang::Expr::IgnoreConversionOperatorSingleStep ( ) const

inline

Definition at line 944 of file Expr.h.

References Expr(), and IgnoreConversionOperatorSingleStep().

◆ IgnoreConversionOperatorSingleStep() [2/2]

Expr * Expr::IgnoreConversionOperatorSingleStep ( )

Skip conversion operators.

If this Expr is a call to a conversion operator, return the argument.

Definition at line 3094 of file Expr.cpp.

References Expr().

Referenced by IgnoreConversionOperatorSingleStep(), and IsArithmeticBinaryExpr().

◆ IgnoreImpCasts() [1/2]

const Expr * clang::Expr::IgnoreImpCasts ( ) const

inline

Definition at line 871 of file Expr.h.

References Expr(), and IgnoreImpCasts().

◆ IgnoreImpCasts() [2/2]

Expr * Expr::IgnoreImpCasts ( )

Skip past any implicit casts which might surround this expression until reaching a fixed point.

Skips:

Definition at line 3065 of file Expr.cpp.

References Expr(), clang::IgnoreExprNodes(), and clang::IgnoreImplicitCastsSingleStep().

Referenced by addFixitForObjCARCConversion(), buildCaptureDecl(), clang::Sema::BuildMemberReferenceExpr(), BuiltinCallWithStaticChain(), castOperatorNeedsParens(), CheckFoldOperand(), CheckIdentityFieldAssignment(), CheckMoveOnConstruction(), clang::SemaObjC::CheckObjCCircularContainer(), checkOpenMPLoop(), CheckTemplateArgumentAddressOfObjectOrFunction(), CheckTemplateArgumentPointerToMember(), clang::Sema::DiagnoseAlwaysNonNullPointer(), DiagnoseForRangeReferenceVariableCopies(), diagnoseLogicalNotOnLHSofCheck(), diagnoseStringPlusChar(), diagnoseStringPlusInt(), doRewriteToUTF8StringBoxedExpressionHelper(), clang::CodeGen::CodeGenFunction::EmitAMDGPUBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitCountedByBoundsChecking(), emitOMPAtomicCaptureExpr(), emitOMPAtomicUpdateExpr(), clang::CodeGen::CodeGenFunction::EmitOMPLinearClauseInit(), getAllocatorKind(), getReferencedDeclOfCallee(), getSValForVar(), getUnwidenedIntegerType(), IgnoreImpCasts(), clang::Sema::InvalidLogicalVectorOperands(), IsArithmeticBinaryExpr(), IsPreserveAIArrayBase(), clang::ASTContext::isSameDefaultTemplateArgument(), lookThroughImplicitCasts(), DerefSimplePtrArithFixableGadget::matches(), UPCPreIncrementGadget::matches(), UUCAddAssignGadget::matches(), requiresParensToAddCast(), rewriteToNumericBoxedExpression(), subscriptOperatorNeedsParens(), clang::ConversionFixItGenerator::tryToFixConversion(), and ValidDuplicateEnum().

◆ IgnoreImplicit() [1/2]

const Expr * clang::Expr::IgnoreImplicit ( ) const

inline

Definition at line 892 of file Expr.h.

References Expr(), and IgnoreImplicit().

◆ IgnoreImplicit() [2/2]

Expr * Expr::IgnoreImplicit ( )

Skip past any implicit AST nodes which might surround this expression until reaching a fixed point.

Skips:

Definition at line 3073 of file Expr.cpp.

References Expr(), clang::IgnoreExprNodes(), and clang::IgnoreImplicitSingleStep().

Referenced by clang::SemaOpenMP::ActOnOpenMPCanonicalLoop(), clang::SemaOpenMP::ActOnOpenMPDispatchDirective(), clang::SemaObjC::adornBoolConversionDiagWithTernaryFixit(), clang::Sema::CheckForImmediateInvocation(), CheckMoveOnConstruction(), CheckNonNullExpr(), clang::SemaOpenMP::checkOpenMPDeclareVariantFunction(), DiagnoseConstAssignment(), clang::Sema::DiagnoseImmediateEscalatingReason(), EvaluateAndDiagnoseImmediateInvocation(), getConstantExprReferredType(), clang::CXXRewrittenBinaryOperator::getDecomposedForm(), getDirectCallExpr(), clang::BindingDecl::getHoldingVar(), clang::CXXConstructorDecl::getTargetConstructor(), IgnoreImplicit(), IsCallableWithAppend(), clang::InitListExpr::isIdiomaticZeroInitializer(), IsReadonlyMessage(), clang::Sema::MarkExpressionAsImmediateEscalating(), needsConversionOfHalfVec(), precomputeExpr(), clang::ento::ExprEngine::ProcessInitializer(), clang::tooling::reallyIgnoreImplicit(), rebuildPotentialResultsAsNonOdrUsed(), RemoveNestedImmediateInvocation(), clang::threadSafety::SExprBuilder::translateAttrExpr(), clang::sema::visitFunctionCallArguments(), and clang::consumed::ConsumedStmtVisitor::VisitVarDecl().

◆ IgnoreImplicitAsWritten() [1/2]

const Expr * clang::Expr::IgnoreImplicitAsWritten ( ) const

inline

Definition at line 902 of file Expr.h.

References Expr(), and IgnoreImplicitAsWritten().

◆ IgnoreImplicitAsWritten() [2/2]

Expr * Expr::IgnoreImplicitAsWritten ( )

Skip past any implicit AST nodes which might surround this expression until reaching a fixed point.

Same as IgnoreImplicit, except that it also skips over implicit calls to constructors and conversion functions.

FIXME: Should IgnoreImplicit do this?

Definition at line 3077 of file Expr.cpp.

References Expr(), clang::IgnoreExprNodes(), and clang::IgnoreImplicitAsWrittenSingleStep().

Referenced by clang::tooling::buildAccess(), DeduceTemplateArguments(), emitOMPAtomicCompareExpr(), and IgnoreImplicitAsWritten().

◆ IgnoreParenBaseCasts() [1/2]

const Expr * clang::Expr::IgnoreParenBaseCasts ( ) const

inline

Definition at line 978 of file Expr.h.

References Expr(), and IgnoreParenBaseCasts().

◆ IgnoreParenBaseCasts() [2/2]

Expr * Expr::IgnoreParenBaseCasts ( )

Skip past any parentheses and derived-to-base casts until reaching a fixed point.

Skips:

What IgnoreParens() skips
CastExpr which represent a derived-to-base cast (CK_DerivedToBase, CK_UncheckedDerivedToBase and CK_NoOp)

Definition at line 3107 of file Expr.cpp.

References Expr(), clang::IgnoreBaseCastsSingleStep(), clang::IgnoreExprNodes(), and clang::IgnoreParensSingleStep().

Referenced by getBestDynamicClassTypeExpr(), and IgnoreParenBaseCasts().

◆ IgnoreParenCasts() [1/2]

const Expr * clang::Expr::IgnoreParenCasts ( ) const

inline

Definition at line 937 of file Expr.h.

References Expr(), and IgnoreParenCasts().

◆ IgnoreParenCasts() [2/2]

Expr * Expr::IgnoreParenCasts ( )

Skip past any parentheses and casts which might surround this expression until reaching a fixed point.

Skips:

What IgnoreParens() skips
What IgnoreCasts() skips

Definition at line 3090 of file Expr.cpp.

References Expr(), clang::IgnoreCastsSingleStep(), clang::IgnoreExprNodes(), and clang::IgnoreParensSingleStep().

Referenced by clang::Sema::ActOnFinishSwitchStmt(), clang::SemaOpenMP::ActOnOpenMPDispatchDirective(), clang::Sema::BuildCallToMemberFunction(), BuiltinAnnotation(), clang::Sema::BuiltinConstantArg(), BuiltinSEHScopeCheck(), clang::Sema::CheckAdditionOperands(), clang::SemaARM::CheckARMBuiltinExclusiveCall(), clang::Sema::CheckAssignmentOperands(), clang::SemaRISCV::CheckBuiltinFunctionCall(), checkFormatStringExpr(), CheckForModifiableLvalue(), CheckForNullPointerDereference(), CheckForNullPointerDereference(), CheckICE(), CheckIndirectionOperand(), checkObjCPointerIntrospection(), clang::SemaObjC::CheckObjCString(), clang::SemaOpenACC::CheckReductionVar(), clang::Sema::CheckStaticArrayArgument(), clang::Sema::checkStringLiteralArgumentAttr(), clang::Sema::checkStringLiteralArgumentAttr(), clang::Sema::CheckSubtractionOperands(), CheckSufficientAllocSize(), CheckTemplateArgumentAddressOfObjectOrFunction(), clang::SemaCodeCompletion::CodeCompleteCase(), clang::analyze_os_log::computeOSLogBufferLayout(), clang::Sema::CreateBuiltinBinOp(), clang::Sema::DefaultFunctionArrayConversion(), clang::Sema::DefaultLvalueConversion(), clang::Sema::DiagnoseAssignmentAsCondition(), diagnoseTautologicalComparison(), clang::CodeGen::CodeGenFunction::EmitAMDGPUBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CodeGen::CodeGenFunction::emitBuiltinOSLogFormat(), clang::CodeGen::CodeGenFunction::EmitPPCBuiltinExpr(), clang::CodeGen::CGOpenMPRuntime::emitPrivateReduction(), clang::CodeGen::CodeGenFunction::EmitRISCVCpuIs(), clang::CodeGen::CodeGenFunction::EmitRISCVCpuSupports(), EmitSpecialRegisterBuiltin(), clang::findCapturingExpr(), FindTypeTagExpr(), getDeclFromThisExpr(), getDirectCallExpr(), getNSArrayObjects(), getObjCProperty(), getStrlenExprArg(), ignoreLiteralAdditions(), IgnoreParenCasts(), isCalleeArrow(), isCapturedBy(), clang::BinaryOperator::isNullPointerArithmeticExtension(), isReferenceToNoReturn(), clang::ASTContext::isSentinelNullExpr(), IsStandardConversion(), isTrivialExpression(), LookThroughTransitiveAssignmentsAndCommaOperators(), LookupMemberExpr(), clang::sema::FunctionScopeInfo::markSafeWeakUse(), maybeAdjustInterfaceForSubscriptingCheck(), clang::ento::ConditionBRVisitor::patternMatch(), peelOffOuterExpr(), REGISTER_MAP_WITH_PROGRAMSTATE(), RemoveSelectorFromWarningCache(), tryEmitSpecializedAllocInit(), TryEvaluateBuiltinNaN(), clang::tryToFindPtrOrigin(), clang::ConversionFixItGenerator::tryToFixConversion(), clang::ento::ConditionBRVisitor::VisitTrueTest(), and clang::ento::ConditionBRVisitor::VisitTrueTest().

◆ IgnoreParenImpCasts() [1/2]

const Expr * clang::Expr::IgnoreParenImpCasts ( ) const

inline

Definition at line 928 of file Expr.h.

References Expr(), and IgnoreParenImpCasts().

◆ IgnoreParenImpCasts() [2/2]

Expr * Expr::IgnoreParenImpCasts ( )

Skip past any parentheses and implicit casts which might surround this expression until reaching a fixed point.

FIXME: IgnoreParenImpCasts really ought to be equivalent to IgnoreParens() + IgnoreImpCasts() until reaching a fixed point. However this is currently not the case. Instead IgnoreParenImpCasts() skips:

Definition at line 3085 of file Expr.cpp.

References Expr(), clang::IgnoreExprNodes(), clang::IgnoreImplicitCastsExtraSingleStep(), and clang::IgnoreParensSingleStep().

◆ IgnoreParenLValueCasts() [1/2]

const Expr * clang::Expr::IgnoreParenLValueCasts ( ) const

inline

Definition at line 957 of file Expr.h.

References Expr(), and IgnoreParenLValueCasts().

◆ IgnoreParenLValueCasts() [2/2]

Expr * Expr::IgnoreParenLValueCasts ( )

Skip past any parentheses and lvalue casts which might surround this expression until reaching a fixed point.

Skips:

What IgnoreParens() skips
What IgnoreCasts() skips, except that only lvalue-to-rvalue casts are skipped FIXME: This is intended purely as a temporary workaround for code that hasn't yet been rewritten to do the right thing about those casts, and may disappear along with the last internal use.

Definition at line 3102 of file Expr.cpp.

References Expr(), clang::IgnoreExprNodes(), clang::IgnoreLValueCastsSingleStep(), and clang::IgnoreParensSingleStep().

Referenced by IgnoreParenLValueCasts(), and clang::SemaObjC::isSelfExpr().

◆ IgnoreParenNoopCasts() [1/2]

const Expr * clang::Expr::IgnoreParenNoopCasts ( const ASTContext & Ctx ) const

inline

Definition at line 968 of file Expr.h.

References Expr(), and IgnoreParenNoopCasts().

◆ IgnoreParenNoopCasts() [2/2]

Expr * Expr::IgnoreParenNoopCasts ( const ASTContext & Ctx )

Skip past any parentheses and casts which do not change the value (including ptr->int casts of the same size) until reaching a fixed point.

Skips:

What IgnoreParens() skips
CastExpr which do not change the value
SubstNonTypeTemplateParmExpr

Definition at line 3112 of file Expr.cpp.

References Expr(), getType(), clang::ASTContext::getTypeSize(), clang::ASTContext::hasSameUnqualifiedType(), clang::IgnoreExprNodes(), clang::IgnoreParensSingleStep(), and clang::Type::isIntegralType().

Referenced by clang::Sema::ActOnGCCAsmStmt(), CheckAsmLValue(), clang::SemaObjC::CheckMessageArgumentTypes(), clang::CodeGen::CodeGenFunction::EmitAsmStmt(), clang::CodeGen::CodeGenFunction::EmitIgnoredExpr(), findPeephole(), clang::Sema::GatherArgumentsForCall(), GetNumNonZeroBytesInInit(), IgnoreParenNoopCasts(), clang::CXXTypeidExpr::isMostDerived(), clang::BinaryOperator::isNullPointerArithmeticExtension(), and stripCasts().

◆ IgnoreParens() [1/2]

const Expr * clang::Expr::IgnoreParens ( ) const

inline

Definition at line 914 of file Expr.h.

References Expr(), and IgnoreParens().

◆ IgnoreParens() [2/2]

Expr * Expr::IgnoreParens ( )

Skip past any parentheses which might surround this expression until reaching a fixed point.

Skips:

ParenExpr
UnaryOperator if UO_Extension
GenericSelectionExpr if !isResultDependent()
ChooseExpr if !isConditionDependent()
ConstantExpr

Definition at line 3081 of file Expr.cpp.

References Expr(), clang::IgnoreExprNodes(), and clang::IgnoreParensSingleStep().

Referenced by clang::Sema::ActOnCXXThrow(), actOnOMPReductionKindClause(), clang::Sema::AddInitializerToDecl(), clang::ast_matchers::AST_MATCHER_P_OVERLOAD(), clang::Sema::BoundsSafetyCheckUseOfCountAttrPtr(), clang::Sema::BuildCallExpr(), clang::Sema::BuildCallToMemberFunction(), clang::Sema::BuildCXXMemberCallExpr(), clang::SemaObjC::BuildObjCBoxedExpr(), clang::canExprResolveTo(), clang::Sema::canThrow(), clang::Sema::CheckAddressOfOperand(), clang::SemaPPC::checkAIXMemberAlignment(), CheckAlignOfExpr(), clang::SemaPseudoObject::checkAssignment(), clang::Sema::CheckFloatComparison(), clang::SemaPseudoObject::checkIncDec(), CheckIndirectionOperand(), checkMapClauseExpressionBase(), CheckMoveOnConstruction(), clang::Sema::CheckPlaceholderExpr(), checkPointerAuthValue(), clang::Sema::CheckPointerToMemberOperands(), clang::SemaHLSL::CheckResourceBinOp(), clang::SemaPseudoObject::checkRValue(), CheckStringInit(), clang::Sema::CheckUnaryExprOrTypeTraitOperand(), clang::Sema::checkUnsafeExprAssigns(), clang::Sema::CheckUseOfCXXMethodAsAddressOfOperand(), clang::Sema::CheckVecStepExpr(), ClassifyMemberExpr(), clang::Sema::completeExprArrayBound(), clang::computeDependence(), clang::Sema::CreateBuiltinBinOp(), clang::ento::ExprEngine::CreateCXXTemporaryObject(), clang::Sema::CreateGenericSelectionExpr(), clang::Sema::DiagnoseAlwaysNonNullPointer(), clang::SemaObjC::diagnoseARCUnbridgedCast(), DiagnoseBadConversion(), DiagnoseDivisionSizeofPointerOrArray(), clang::Sema::DiagnoseEqualityWithExtraParens(), clang::Sema::DiscardMisalignedMemberAddress(), DoMarkPotentialCapture(), doRewriteToUTF8StringBoxedExpressionHelper(), clang::CodeGen::CodeGenFunction::EmitAttributedStmt(), clang::CodeGen::CodeGenFunction::EmitBPFBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitCallee(), clang::CIRGen::CIRGenFunction::emitCallee(), clang::CodeGen::CodeGenFunction::EmitCXXMemberCallExpr(), clang::CIRGen::CIRGenFunction::emitCXXMemberCallExpr(), clang::CodeGen::CodeGenFunction::EmitCXXMemberPointerCallExpr(), clang::CodeGen::CodeGenPGO::emitMCDCCondBitmapReset(), clang::CodeGen::CodeGenPGO::emitMCDCTestVectorBitmapUpdate(), clang::CIRGen::CIRGenFunction::emitOpOnBoolExpr(), clang::CodeGen::CodeGenFunction::EmitOrigPointerRValue(), EmitPointerWithAlignment(), EvaluateLValue(), clang::OverloadExpr::find(), findEnumForBlockReturn(), clang::findRetainCycleOwner(), findWeakLValue(), GetAlignOfExpr(), getBaseAlignmentAndOffsetFromLValue(), getBaseAlignmentAndOffsetFromPtr(), clang::ento::SValBuilder::getConstantVal(), clang::Sema::getDecltypeForExpr(), getExprAsWritten(), clang::CXXMemberCallExpr::getImplicitObjectArgument(), clang::CXXMemberCallExpr::getMethodDecl(), clang::Sema::getNamedReturnInfo(), getPrivateItem(), getReferencedDeclOfCallee(), getSourceBitField(), getSyntacticFromForPseudoObjectExpr(), clang::CFGBlock::getTerminatorCondition(), clang::dataflow::ignoreCFGOmittedNodes(), IgnoreCommaOperand(), IgnoreParens(), ignorePointerCastsAndParens(), ignoreTransparentExprs(), clang::CodeGen::CodeGenFunction::isBinaryLogicalOp(), isBlockVarRef(), isCheapEnoughToEvaluateUnconditionally(), isCheapEnoughToEvaluateUnconditionally(), isFlexibleArrayMemberLike(), isGLValueFromPointerDeref(), isInvalidICRSource(), isKnownToHaveBooleanValue(), IsLiteralConstantExpr(), isLValueKnownNonNull(), IsModifiable(), isOBJCGCCandidate(), isParenthesizedADLCallee(), clang::CodeGen::CodeGenFunction::isPointerKnownNonNull(), isReadIfDiscardedInCPlusPlus11(), isReferenceToNonConstCapture(), isSameComparisonOperand(), isSimpleZero(), IsStandardConversion(), clang::Sema::IsStringLiteralToNonConstPointerConversion(), clang::CodeGen::CodeGenFunction::isUnderlyingBasePointerConstantNull(), isUnusedResultAWarning(), clang::isValidPreserveEnumValueArg(), clang::isValidPreserveFieldInfoArg(), clang::isValidPreserveTypeInfoArg(), LookThroughExpr(), DerefSimplePtrArithFixableGadget::matches(), maybeGetUnaryAddrOfOperand(), clang::InitializationSequence::Perform(), refersToVectorElement(), shouldEmitSeparateBlockRetain(), shouldExtendReceiverForInnerPointerMessage(), clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue(), clang::CIRGen::CIRGenFunction::shouldNullCheckClassCastValue(), skipRValueSubobjectAdjustments(), skipTemporaryBindingsNoOpCastsAndParens(), tryEmitARCCopyWeakInit(), tryEmitARCRetainLoadOfScalar(), clang::Sema::tryExprAsCall(), TryGetExprRange(), tryTransformToLiteralConstant(), UnpackConstruction(), clang::ento::ExprEngine::VisitArraySubscriptExpr(), clang::ento::ExprEngine::VisitBinaryOperator(), clang::ento::ExprEngine::VisitGuardedExpr(), and clang::interp::Compiler< Emitter >::VisitUnaryExprOrTypeTraitExpr().

◆ IgnoreUnlessSpelledInSource() [1/2]

Expr * Expr::IgnoreUnlessSpelledInSource ( )

Skip past any invisible AST nodes which might surround this statement, such as ExprWithCleanups or ImplicitCastExpr nodes, but also injected CXXMemberExpr and CXXConstructExpr which represent implicit conversions.

Definition at line 3138 of file Expr.cpp.

References clang::C, clang::cast(), Expr(), clang::Stmt::getSourceRange(), clang::IgnoreExprNodes(), clang::IgnoreImplicitCastsExtraSingleStep(), IgnoreImplicitConstructorSingleStep(), clang::IgnoreImplicitSingleStep(), IgnoreParenImpCasts(), clang::IgnoreParensOnlySingleStep(), clang::isa(), and IsDecompositionDeclRefExpr().

Referenced by IgnoreUnlessSpelledInSource(), IsDecompositionDeclRefExpr(), and clang::ParentMapContext::traverseIgnored().

◆ IgnoreUnlessSpelledInSource() [2/2]

const Expr * clang::Expr::IgnoreUnlessSpelledInSource ( ) const

inline

Definition at line 862 of file Expr.h.

References Expr(), and IgnoreUnlessSpelledInSource().

◆ isBoundMemberFunction()

bool Expr::isBoundMemberFunction ( ASTContext & Ctx ) const

Returns true if this expression is a bound member function.

Definition at line 3035 of file Expr.cpp.

References ClassifyLValue(), isTypeDependent(), and LV_MemberFunction.

◆ isConstantInitializer()

bool Expr::isConstantInitializer	(	ASTContext &	Ctx,
		bool	ForRef,
		const Expr **	Culprit = nullptr ) const

isConstantInitializer - Returns true if this expression can be emitted to IR as a constant, and thus can be used as a constant initializer in C.

If this expression is not constant and Culprit is non-null, it is used to store the address of first non constant expr.

Definition at line 3342 of file Expr.cpp.

References clang::cast(), clang::Type::castAsRecordDecl(), EvaluateAsInt(), EvaluateAsLValue(), Expr(), clang::CXXConstructExpr::getArg(), clang::DesignatedInitUpdateExpr::getBase(), clang::CastExpr::getCastKind(), clang::CXXConstructExpr::getConstructor(), clang::InitListExpr::getInit(), clang::InitListExpr::getInitializedFieldInUnion(), clang::CXXConstructExpr::getNumArgs(), clang::InitListExpr::getNumInits(), clang::UnaryOperator::getOpcode(), clang::CXXMethodDecl::getParent(), clang::Stmt::getStmtClass(), clang::CastExpr::getSubExpr(), clang::UnaryOperator::getSubExpr(), getType(), clang::DesignatedInitUpdateExpr::getUpdater(), clang::CXXRecordDecl::hasTrivialDestructor(), clang::Type::isArrayType(), isConstantInitializer(), isEvaluatable(), clang::Type::isRecordType(), clang::InitListExpr::isSemanticForm(), clang::InitListExpr::isTransparent(), clang::FunctionDecl::isTrivial(), isValueDependent(), clang::Result, and SE_AllowUndefinedBehavior.

Referenced by clang::CodeGen::CodeGenFunction::EmitAutoVarAlloca(), clang::Sema::InstantiateVariableInitializer(), and isConstantInitializer().

◆ isCXX11ConstantExpr()

bool Expr::isCXX11ConstantExpr	(	const ASTContext &	Ctx,
		APValue *	Result = nullptr ) const

isCXX11ConstantExpr - Return true if this expression is a constant expression in C++11.

Can only be used in C++.

Note: This does not perform the implicit conversions required by C++11 [expr.const]p5.

Definition at line 18648 of file ExprConstant.cpp.

References clang::ConstantExpression, EvaluateAsRValue(), FastEvaluateAsRValue(), clang::ASTContext::getLangOpts(), clang::APValue::hasValue(), isValueDependent(), and clang::Result.

Referenced by EvaluateCPlusPlus11IntegralConstantExpr().

◆ isCXX98IntegralConstantExpr()

bool Expr::isCXX98IntegralConstantExpr ( const ASTContext & Ctx ) const

isCXX98IntegralConstantExpr - Return true if this expression is an integral constant expression in C++98.

Can only be used in C++.

Definition at line 18641 of file ExprConstant.cpp.

References CheckICE(), and isValueDependent().

Referenced by isNullPointerConstant().

◆ isDefaultArgument()

bool Expr::isDefaultArgument ( ) const

Determine whether this expression is a default function argument.

Default arguments are implicitly generated in the abstract syntax tree by semantic analysis for function calls, object constructions, etc. in C++. Default arguments are represented by CXXDefaultArgExpr nodes; this routine also looks through any implicit casts to determine whether the expression is a default argument.

Definition at line 3209 of file Expr.cpp.

References Expr(), and clang::isa().

Referenced by clang::TreeTransform< AdjustConstraintDepth >::DropCallArgument(), and clang::CXXConstructExpr::getEndLoc().

◆ isEvaluatable()

bool Expr::isEvaluatable	(	const ASTContext &	Ctx,
		SideEffectsKind	AllowSideEffects = SE_NoSideEffects ) const

isEvaluatable - Call EvaluateAsRValue to see if this expression can be constant folded without side-effects, but discard the result.

isEvaluatable - Call EvaluateAsRValue to see if this expression can be constant folded, but discard the result.

Definition at line 18040 of file ExprConstant.cpp.

References EvaluateAsRValue(), hasUnacceptableSideEffect(), isValueDependent(), and clang::Result.

Referenced by clang::Sema::ActOnGCCAsmStmt(), clang::CodeGen::CodeGenFunction::EmitReturnStmt(), isCheapEnoughToEvaluateUnconditionally(), isCheapEnoughToEvaluateUnconditionally(), isConstantInitializer(), and isTrivial().

◆ isFlexibleArrayMemberLike()

bool Expr::isFlexibleArrayMemberLike	(	const ASTContext &	Context,
		LangOptions::StrictFlexArraysLevelKind	StrictFlexArraysLevel,
		bool	IgnoreTemplateOrMacroSubstitution = false ) const

Check whether this array fits the idiom of a flexible array member, depending on the value of -fstrict-flex-array.

When IgnoreTemplateOrMacroSubstitution is set, it doesn't consider sizes resulting from the substitution of a macro or a template as special sizes.

Definition at line 202 of file Expr.cpp.

References Expr(), getType(), IgnoreParens(), and clang::Decl::isFlexibleArrayMemberLike().

◆ isGLValue()

bool clang::Expr::isGLValue ( ) const

inline

Definition at line 287 of file Expr.h.

References getValueKind(), and clang::VK_PRValue.

Referenced by clang::Sema::ActOnConditionalOp(), buildCapture(), buildCaptureDecl(), clang::Sema::BuildCXXTypeId(), clang::Sema::BuildSynthesizedThreeWayComparison(), clang::interp::Context::canClassify(), clang::CastExpr::changesVolatileQualification(), clang::interp::Context::classify(), clang::ento::SValBuilder::conjureSymbolVal(), clang::Sema::CreateBuiltinUnaryOp(), clang::Sema::DefaultArgumentPromotion(), clang::Sema::DefaultLvalueConversion(), clang::CodeGen::CodeGenFunction::EmitCallArg(), clang::CIRGen::CIRGenFunction::emitCallArg(), clang::CodeGen::CodeGenFunction::EmitExtVectorElementExpr(), clang::CodeGen::CodeGenFunction::EmitIgnoredConditionalOperator(), clang::CodeGen::CodeGenFunction::EmitInitListLValue(), Evaluate(), EvaluateAsRValue(), clang::interp::Context::evaluateAsRValue(), EvaluateLValue(), clang::ento::SValBuilder::getConstantVal(), clang::SemaOpenMP::getOpenMPCapturedExpr(), clang::dataflow::Environment::getStorageLocation(), HandleDynamicCast(), clang::CompoundLiteralExpr::hasStaticStorage(), hasTrivialGetExpr(), clang::CFGCXXRecordTypedCall::isCXXRecordTypedCall(), clang::CXXTypeidExpr::isPotentiallyEvaluated(), isReadIfDiscardedInCPlusPlus11(), isRvalueByValueRecord(), IsStandardConversion(), clang::InitListExpr::isTransparent(), clang::Sema::MaybeBindToTemporary(), clang::dataflow::propagateValueOrStorageLocation(), clang::dataflow::Environment::setStorageLocation(), TryClassUnification(), TryContextuallyConvertToBool(), clang::CIRGen::ConstantEmitter::tryEmitConstantExpr(), clang::CodeGen::ConstantEmitter::tryEmitConstantExpr(), tryEvaluateBuiltinObjectSize(), TryLValueToRValueCast(), TryReinterpretCast(), clang::interp::Compiler< Emitter >::visit(), clang::ento::ExprEngine::VisitArraySubscriptExpr(), clang::interp::Compiler< Emitter >::VisitArraySubscriptExpr(), clang::ento::ExprEngine::VisitBinaryOperator(), clang::interp::Compiler< Emitter >::VisitBuiltinCallExpr(), clang::ento::ExprEngine::VisitCast(), clang::ento::ExprEngine::VisitCommonDeclRefExpr(), clang::interp::Compiler< Emitter >::VisitCXXStdInitializerListExpr(), clang::interp::Compiler< Emitter >::VisitExtVectorElementExpr(), clang::ento::ExprEngine::VisitMemberExpr(), clang::interp::Compiler< Emitter >::VisitMemberExpr(), and clang::interp::Compiler< Emitter >::VisitUnaryOperator().

◆ isImplicitCXXThis()

bool Expr::isImplicitCXXThis ( ) const

Whether this expression is an implicit reference to 'this' in C++.

Definition at line 3290 of file Expr.cpp.

References Expr(), and Paren.

Referenced by clang::tooling::buildAccess(), clang::tooling::buildAddressOf(), clang::MemberExpr::isImplicitAccess(), and clang::MSPropertyRefExpr::isImplicitAccess().

◆ isInstantiationDependent()

bool clang::Expr::isInstantiationDependent ( ) const

inline

Whether this expression is instantiation-dependent, meaning that it depends in some way on.

a template parameter (even if neither its type nor (constant) value can change due to the template instantiation)
or an error

In the following example, the expression sizeof(sizeof(T() + T())) is instantiation-dependent (since it involves a template parameter T), but is neither type- nor value-dependent, since the type of the inner sizeof is known (std::size_t) and therefore the size of the outer sizeof is known.

template<typename T>
void f(T x, T y) {
  sizeof(sizeof(T() + T());
}

void func(int) {
  func(); // the expression is instantiation-dependent, because it depends
          // on an error.
}

Definition at line 223 of file Expr.h.

References getDependence().

◆ isIntegerConstantExpr()

bool Expr::isIntegerConstantExpr ( const ASTContext & Ctx ) const

◆ isKnownToHaveBooleanValue()

bool Expr::isKnownToHaveBooleanValue ( bool Semantic = true ) const

isKnownToHaveBooleanValue - Return true if this is an integer expression that is known to return 0 or 1.

This happens for _Bool/bool expressions but also int expressions which are produced by things like comparisons in C.

Parameters

Semantic If true, only return true for expressions that are known to be semantically boolean, which might not be true even for expressions that are known to evaluate to 0/1. For instance, reading an unsigned bit-field with width '1' will evaluate to 0/1, but doesn't necessarily semantically correspond to a bool.

Definition at line 133 of file Expr.cpp.

References Expr(), getSourceBitField(), getType(), IgnoreParens(), clang::isa(), clang::Type::isBooleanType(), and clang::Type::isIntegralOrEnumerationType().

Referenced by clang::Sema::ActOnStartOfSwitchStmt(), clang::Sema::CheckImplicitConversion(), and diagnoseLogicalNotOnLHSofCheck().

◆ isLValue()

bool clang::Expr::isLValue ( ) const

inline

isLValue - True if this expression is an "l-value" according to the rules of the current language.

C and C++ give somewhat different rules for this concept, but in general, the result of an l-value expression identifies a specific object whereas the result of an r-value expression is a value detached from any specific storage.

C++11 divides the concept of "r-value" into pure r-values ("pr-values") and so-called expiring values ("x-values"), which identify specific objects that can be safely cannibalized for their resources.

Definition at line 284 of file Expr.h.

References getValueKind(), isLValue(), and clang::VK_LValue.

Referenced by clang::SemaObjC::ActOnObjCForCollectionStmt(), clang::SemaOpenMP::ActOnOpenMPDepobjClause(), clang::SemaOpenMP::ActOnOpenMPUsesAllocatorClause(), clang::SemaHLSL::ActOnOutParamExpr(), clang::Sema::ActOnParenExpr(), clang::Sema::BuildExpressionFromDeclTemplateArgument(), CheckAsmLValue(), clang::Sema::CheckSizelessVectorOperands(), checkTupleLikeDecomposition(), clang::Sema::CheckVectorOperands(), ClassifyInternal(), clang::Sema::ConstantFoldAttrArgs(), clang::Sema::DefaultFunctionArrayConversion(), clang::InitializationSequence::Diagnose(), EvaluateExpressionTrait(), clang::CodeGen::CodeGenFunction::GetCountedByFieldExprGEP(), getObjCProperty(), clang::MaterializeTemporaryExpr::isBoundToLvalueReference(), IsGlobalLValue(), clang::ento::ExplodedGraph::isInterestingLValueExpr(), isLValue(), isReferenceToNonConstCapture(), clang::InitializationSequence::Perform(), clang::SemaHLSL::transformInitList(), TryConstCast(), tryEmitARCCopyWeakInit(), TryLValueToRValueCast(), TryStaticReferenceDowncast(), clang::ConversionFixItGenerator::tryToFixConversion(), clang::interp::Compiler< Emitter >::VisitComplexUnaryOperator(), clang::interp::Compiler< Emitter >::VisitCompoundLiteralExpr(), and clang::interp::Compiler< Emitter >::VisitCXXTypeidExpr().

◆ isModifiableLvalue()

Expr::isModifiableLvalueResult Expr::isModifiableLvalue	(	ASTContext &	Ctx,
		SourceLocation *	Loc = nullptr ) const

isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, does not have an incomplete type, does not have a const-qualified type, and if it is a structure or union, does not have any member (including, recursively, any member or element of all contained aggregates or unions) with a const-qualified type.

Parameters

Loc	[in,out] - A source location which may be filled in with the location of the expression making this a non-modifiable lvalue, if specified.

Definition at line 749 of file ExprClassification.cpp.

Referenced by clang::Sema::ActOnGCCAsmStmt(), and CheckForModifiableLvalue().

◆ isNullPointerConstant()

Expr::NullPointerConstantKind Expr::isNullPointerConstant	(	ASTContext &	Ctx,
		NullPointerConstantValueDependence	NPC ) const

isNullPointerConstant - C99 6.3.2.3p3 - Test if this reduces down to a Null pointer constant.

isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null pointer constant or not, as well as the specific kind of constant detected.

The return value can further distinguish the kind of NULL pointer constant that was detected.

Null pointer constants can be integer constant expressions with the value zero, casts of zero to void*, nullptr (C++0X), or __null (a GNU extension).

Definition at line 4042 of file Expr.cpp.

References containsErrors(), clang::Qualifiers::empty(), EvaluateKnownConstInt(), Expr(), clang::QualType::getAddressSpace(), clang::Type::getAs(), clang::ASTContext::getDefaultOpenCLPointeeAddrSpace(), clang::ASTContext::getLangOpts(), clang::Type::getPointeeType(), clang::QualType::getQualifiers(), getType(), clang::APIntStorage::getValue(), clang::isa(), isCXX98IntegralConstantExpr(), isIntegerConstantExpr(), isTypeDependent(), isValueDependent(), clang::Type::isVoidType(), NPC_NeverValueDependent, NPC_ValueDependentIsNotNull, NPC_ValueDependentIsNull, NPCK_CXX11_nullptr, NPCK_GNUNull, NPCK_NotNull, NPCK_ZeroExpression, NPCK_ZeroLiteral, and clang::Qualifiers::removeAddressSpace().

◆ isOBJCGCCandidate()

bool Expr::isOBJCGCCandidate ( ASTContext & Ctx ) const

isOBJCGCCandidate - Return true if this expression may be used in a read/ write barrier.

isOBJCGCCandidate - Check if an expression is objc gc'able.

returns true, if it is; false otherwise.

Definition at line 2996 of file Expr.cpp.

References clang::cast(), Expr(), clang::MemberExpr::getBase(), clang::ASTContext::getObjCGCAttrKind(), clang::Stmt::getStmtClass(), IgnoreParens(), isOBJCGCCandidate(), clang::T, and clang::Qualifiers::Weak.

Referenced by clang::CodeGen::CodeGenFunction::EmitArraySubscriptExpr(), clang::CodeGen::CodeGenFunction::EmitUnaryOpLValue(), and isOBJCGCCandidate().

◆ isObjCSelfExpr()

bool Expr::isObjCSelfExpr ( ) const

Check if this expression is the ObjC 'self' implicit parameter.

Definition at line 4187 of file Expr.cpp.

References Expr(), clang::DeclRefExpr::getDecl(), clang::ObjCMethodDecl::getSelfDecl(), and IgnoreParenImpCasts().

Referenced by clang::SemaObjC::BuildInstanceMessage(), and clang::SemaObjC::getMessageSendResultType().

◆ isOrdinaryOrBitFieldObject()

bool clang::Expr::isOrdinaryOrBitFieldObject ( ) const

inline

Definition at line 455 of file Expr.h.

References getObjectKind(), clang::OK_BitField, and clang::OK_Ordinary.

Referenced by clang::Sema::ActOnConditionalOp(), and clang::Sema::CXXCheckConditionalOperands().

◆ isPotentialConstantExpr()

bool Expr::isPotentialConstantExpr	(	const FunctionDecl *	FD,
		SmallVectorImpl< PartialDiagnosticAt > &	Diags )

static

isPotentialConstantExpr - Return true if this function's definition might be usable in a constant expression in C++11, if it were marked constexpr.

Return false if the function can never produce a constant expression, along with diagnostics describing why not.

Definition at line 18751 of file ExprConstant.cpp.

References clang::ConstantExpression, clang::Expr::EvalStatus::Diag, clang::Decl::getASTContext(), clang::FunctionDecl::getBody(), clang::CXXRecordDecl::getCanonicalDecl(), clang::ASTContext::getCanonicalTagType(), clang::ASTContext::getInterpContext(), clang::Decl::getLocation(), clang::FunctionDecl::getNameForDiagnostic(), clang::CXXMethodDecl::getParent(), clang::ASTContext::getPrintingPolicy(), HandleConstructorCall(), HandleFunctionCall(), clang::ASTContext::IntTy, clang::DeclContext::isDependentContext(), clang::CXXMethodDecl::isImplicitObjectMemberFunction(), and clang::interp::Context::isPotentialConstantExpr().

Referenced by CheckConstexprFunctionBody().

◆ isPotentialConstantExprUnevaluated()

bool Expr::isPotentialConstantExprUnevaluated	(	Expr *	E,
		const FunctionDecl *	FD,
		SmallVectorImpl< PartialDiagnosticAt > &	Diags )

static

isPotentialConstantExprUnevaluated - Return true if this expression might be usable in a constant expression in C++11 in an unevaluated context, if it were in function FD marked constexpr.

Return false if the function can never produce a constant expression, along with diagnostics describing why not.

Definition at line 18811 of file ExprConstant.cpp.

References clang::ConstantExpressionUnevaluated, clang::Expr::EvalStatus::Diag, Evaluate(), Expr(), clang::Decl::getASTContext(), clang::ASTContext::getInterpContext(), clang::interp::Context::isPotentialConstantExprUnevaluated(), and isValueDependent().

Referenced by checkFunctionConditionAttr(), and instantiateDependentFunctionAttrCondition().

◆ isPRValue()

bool clang::Expr::isPRValue ( ) const

inline

Definition at line 285 of file Expr.h.

References getValueKind(), and clang::VK_PRValue.

Referenced by clang::Sema::ActOnConditionalOp(), clang::Sema::BuildArrayType(), clang::Sema::BuildCoyieldExpr(), clang::Sema::BuildMemberReferenceExpr(), clang::Sema::BuildResolvedCoawaitExpr(), CheckICE(), checkIndirectCopyRestoreSource(), CheckLiteralType(), CheckMoveOnConstruction(), clang::Sema::CheckPointerToMemberOperands(), ClassifyInternal(), clang::ento::ExprEngine::ConstructInitList(), clang::Sema::CreateBuiltinArraySubscriptExpr(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), clang::CIRGen::CIRGenFunction::emitBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitIgnoredExpr(), clang::CIRGen::CIRGenFunction::emitIgnoredExpr(), clang::CodeGen::CodeGenFunction::EmitObjCIsaExpr(), emitPseudoObjectExpr(), EvaluateArray(), EvaluateArrayNewConstructExpr(), EvaluateArrayNewInitList(), EvaluateAsBooleanCondition(), EvaluateAtomic(), EvaluateAtomicConstraint(), EvaluateBuiltinStrLen(), EvaluateComplex(), EvaluateExpressionTrait(), EvaluateFloat(), EvaluateInPlace(), EvaluateIntegerOrLValue(), EvaluateMemberPointer(), EvaluatePointer(), EvaluateRecord(), EvaluateTemporary(), EvaluateVector(), EvaluateVoid(), clang::Sema::FillInlineAsmIdentifierInfo(), clang::dataflow::Environment::getResultObjectLocation(), clang::dataflow::Environment::getValue(), clang::Sema::IgnoredValueConversions(), ignorePointerCastsAndParens(), clang::Sema::ImpCastExprToType(), clang::InitListExpr::isTransparent(), clang::Sema::maybeExtendBlockObject(), clang::InitializationSequence::Perform(), clang::Sema::PerformImplicitConversion(), clang::Sema::PerformImplicitObjectArgumentInitialization(), clang::dataflow::Environment::setValue(), clang::Sema::TemporaryMaterializationConversion(), TryConstCast(), and TryListInitialization().

◆ isReadIfDiscardedInCPlusPlus11()

bool Expr::isReadIfDiscardedInCPlusPlus11 ( ) const

Determine whether an lvalue-to-rvalue conversion should implicitly be applied to this expression if it appears as a discarded-value expression in C++11 onwards.

This applies to certain forms of volatile glvalues.

Definition at line 2560 of file Expr.cpp.

References Expr(), getType(), IgnoreParens(), clang::isa(), and isGLValue().

Referenced by clang::Sema::IgnoredValueConversions(), and isUnusedResultAWarning().

◆ isSameComparisonOperand()

bool Expr::isSameComparisonOperand	(	const Expr *	E1,
		const Expr *	E2 )

static

Checks that the two Expr's will refer to the same value as a comparison operand.

The caller must ensure that the values referenced by the Expr's are not modified between E1 and E2 or the result my be invalid.

Definition at line 4296 of file Expr.cpp.

References clang::cast(), clang::declaresSameEntity(), Expr(), clang::Stmt::getStmtClass(), IgnoreParenImpCasts(), IgnoreParens(), clang::isa(), and isSameComparisonOperand().

Referenced by diagnoseTautologicalComparison(), isSameComparisonOperand(), and isTautologicalBoundsCheck().

◆ isTemporaryObject()

bool Expr::isTemporaryObject	(	ASTContext &	Ctx,
		const CXXRecordDecl *	TempTy ) const

Determine whether the result of this expression is a temporary object of the given class type.

isTemporaryObject - Determines if this expression produces a temporary of the given class type.

Definition at line 3248 of file Expr.cpp.

References clang::C, Classify(), Expr(), getType(), clang::isa(), clang::Expr::Classification::isPRValue(), and skipTemporaryBindingsNoOpCastsAndParens().

Referenced by clang::Sema::BuildCXXConstructExpr(), CopyObject(), clang::CodeGen::CodeGenFunction::EmitCXXConstructExpr(), clang::CIRGen::CIRGenFunction::emitCXXConstructExpr(), and clang::interp::Compiler< Emitter >::VisitCXXConstructExpr().

◆ isTypeDependent()

bool clang::Expr::isTypeDependent ( ) const

inline

Determines whether the type of this expression depends on.

a template parameter (C++ [temp.dep.expr], which means that its type could change from one template instantiation to the next)
or an error

For example, the expressions "x" and "x + y" are type-dependent in the following code, but "y" is not type-dependent:

template<typename T>
void add(T x, int y) {
  x + y;
}

Definition at line 194 of file Expr.h.

References getDependence().

◆ isUnusedResultAWarning()

bool Expr::isUnusedResultAWarning	(	const Expr *&	WarnE,
		SourceLocation &	Loc,
		SourceRange &	R1,
		SourceRange &	R2,
		ASTContext &	Ctx ) const

isUnusedResultAWarning - Return true if this immediate expression should be warned about if the result is unused.

If so, fill in expr, location, and ranges with expr to warn on and source locations/ranges appropriate for a warning.

If so, fill in Loc and Ranges with location to warn on and the source range[s] to report with the warning.

Definition at line 2626 of file Expr.cpp.

References clang::CompoundStmt::body_back(), clang::CompoundStmt::body_empty(), clang::cast(), Expr(), clang::CallExpr::getArg(), clang::Type::getAsCXXRecordDecl(), clang::Stmt::getBeginLoc(), clang::CallExpr::getCalleeDecl(), clang::CallExpr::getCallReturnType(), clang::ASTContext::getCanonicalType(), clang::CastExpr::getCastKind(), clang::Stmt::getEndLoc(), getExpr(), getExprLoc(), clang::ASTContext::getLangOpts(), clang::BinaryOperator::getLHS(), clang::CStyleCastExpr::getLParenLoc(), clang::ObjCMessageExpr::getMethodFamily(), clang::CallExpr::getNumArgs(), clang::BinaryOperator::getOpcode(), clang::UnaryOperator::getOpcode(), clang::CXXOperatorCallExpr::getOperator(), clang::BinaryOperator::getOperatorLoc(), clang::CXXOperatorCallExpr::getOperatorLoc(), clang::UnaryOperator::getOperatorLoc(), clang::BinaryOperator::getRHS(), clang::CXXOperatorCallExpr::getSourceRange(), clang::Stmt::getSourceRange(), clang::Stmt::getStmtClass(), clang::CastExpr::getSubExpr(), clang::UnaryOperator::getSubExpr(), getType(), clang::Decl::hasAttr(), clang::Type::hasAttr(), clang::CallExpr::hasUnusedResultAttr(), clang::ObjCMessageExpr::hasUnusedResultAttr(), IgnoreParens(), clang::isa(), clang::Type::isArrayType(), clang::BinaryOperator::isAssignmentOp(), clang::ObjCMessageExpr::isInstanceMessage(), isReadIfDiscardedInCPlusPlus11(), clang::Type::isReferenceType(), isTypeDependent(), isUnusedResultAWarning(), clang::Type::isVoidType(), clang::CanQual< T >::isVolatileQualified(), clang::QualType::isVolatileQualified(), clang::OMF_init, and clang::Result.

Referenced by isUnusedResultAWarning().

◆ isValueDependent()

bool clang::Expr::isValueDependent ( ) const

inline

Determines whether the value of this expression depends on.

a template parameter (C++ [temp.dep.constexpr])
or an error, whose resolution is unknown

For example, the array bound of "Chars" in the following example is value-dependent.

template<int Size, char (&Chars)[Size]> struct meta_string;

Definition at line 177 of file Expr.h.

References getDependence().

◆ isXValue()

bool clang::Expr::isXValue ( ) const

inline

Definition at line 286 of file Expr.h.

References getValueKind(), and clang::VK_XValue.

Referenced by clang::Sema::getNamedReturnInfo(), tryEmitARCCopyWeakInit(), and tryEmitARCRetainLoadOfScalar().

◆ operator=() [1/2]

Expr & clang::Expr::operator= ( const Expr & )

delete

References Expr().

◆ operator=() [2/2]

Expr & clang::Expr::operator= ( Expr && )

delete

References Expr().

◆ refersToBitField()

bool clang::Expr::refersToBitField ( ) const

inline

Returns true if this expression is a gl-value that potentially refers to a bit-field.

In C++, whether a gl-value refers to a bitfield is essentially an aspect of the value-kind type system.

Definition at line 476 of file Expr.h.

References getObjectKind(), and clang::OK_BitField.

Referenced by clang::Sema::ActOnMSAsmStmt(), BuildConvertedConstantExpression(), clang::Sema::BuildTypeofExprType(), checkExprMemoryConstraintCompat(), clang::Sema::CreateUnaryExprOrTypeTraitExpr(), clang::Sema::CXXCheckConditionalOperands(), clang::CodeGen::CodeGenFunction::EmitBinaryOperatorLValue(), isNonReferenceableGLValue(), TryConstCast(), and clang::interp::Compiler< Emitter >::VisitCompoundAssignOperator().

◆ refersToGlobalRegisterVar()

bool Expr::refersToGlobalRegisterVar ( ) const

Returns whether this expression refers to a global register variable.

Definition at line 4284 of file Expr.cpp.

References Expr(), IgnoreParenImpCasts(), and clang::SC_Register.

Referenced by checkExprMemoryConstraintCompat().

◆ refersToMatrixElement()

bool clang::Expr::refersToMatrixElement ( ) const

inline

Returns whether this expression refers to a matrix element.

Definition at line 514 of file Expr.h.

References getObjectKind(), and clang::OK_MatrixComponent.

Referenced by isNonReferenceableGLValue().

◆ refersToVectorElement()

bool Expr::refersToVectorElement ( ) const

Returns whether this expression refers to a vector element.

Definition at line 4259 of file Expr.cpp.

References Expr(), IgnoreParens(), clang::isa(), and refersToVectorElement().

Referenced by checkExprMemoryConstraintCompat(), clang::Sema::CXXCheckConditionalOperands(), isNonReferenceableGLValue(), and refersToVectorElement().

◆ setDependence()

void clang::Expr::setDependence ( ExprDependence Deps )

inlineprotected

Each concrete expr subclass is expected to compute its dependence and call this in the constructor.

Definition at line 137 of file Expr.h.

References clang::Stmt::ExprBits.

Referenced by clang::AddrLabelExpr::AddrLabelExpr(), clang::ArrayInitIndexExpr::ArrayInitIndexExpr(), clang::ArrayInitLoopExpr::ArrayInitLoopExpr(), clang::ArraySectionExpr::ArraySectionExpr(), clang::ArraySectionExpr::ArraySectionExpr(), clang::ArraySubscriptExpr::ArraySubscriptExpr(), clang::ArrayTypeTraitExpr::ArrayTypeTraitExpr(), clang::AsTypeExpr::AsTypeExpr(), clang::AtomicExpr::AtomicExpr(), clang::BinaryConditionalOperator::BinaryConditionalOperator(), clang::BinaryOperator::BinaryOperator(), clang::BinaryOperator::BinaryOperator(), clang::BlockExpr::BlockExpr(), clang::CharacterLiteral::CharacterLiteral(), clang::ChooseExpr::ChooseExpr(), clang::CompoundLiteralExpr::CompoundLiteralExpr(), clang::CallExpr::computeDependence(), clang::ConditionalOperator::ConditionalOperator(), clang::CoroutineSuspendExpr::CoroutineSuspendExpr(), clang::CoroutineSuspendExpr::CoroutineSuspendExpr(), clang::CXXBoolLiteralExpr::CXXBoolLiteralExpr(), clang::CXXConstructExpr::CXXConstructExpr(), clang::CXXDeleteExpr::CXXDeleteExpr(), clang::CXXFoldExpr::CXXFoldExpr(), clang::CXXInheritedCtorInitExpr::CXXInheritedCtorInitExpr(), clang::CXXNoexceptExpr::CXXNoexceptExpr(), clang::CXXNullPtrLiteralExpr::CXXNullPtrLiteralExpr(), clang::CXXPseudoDestructorExpr::CXXPseudoDestructorExpr(), clang::CXXRewrittenBinaryOperator::CXXRewrittenBinaryOperator(), clang::CXXScalarValueInitExpr::CXXScalarValueInitExpr(), clang::CXXStdInitializerListExpr::CXXStdInitializerListExpr(), clang::CXXThrowExpr::CXXThrowExpr(), clang::CXXTypeidExpr::CXXTypeidExpr(), clang::CXXTypeidExpr::CXXTypeidExpr(), clang::CXXUuidofExpr::CXXUuidofExpr(), clang::CXXUuidofExpr::CXXUuidofExpr(), clang::DeclRefExpr::DeclRefExpr(), clang::DependentCoawaitExpr::DependentCoawaitExpr(), clang::DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(), clang::EmbedExpr::EmbedExpr(), clang::ExplicitCastExpr::ExplicitCastExpr(), clang::ExpressionTraitExpr::ExpressionTraitExpr(), clang::ExtVectorElementExpr::ExtVectorElementExpr(), clang::FixedPointLiteral::FixedPointLiteral(), clang::FullExpr::FullExpr(), clang::GNUNullExpr::GNUNullExpr(), clang::ImaginaryLiteral::ImaginaryLiteral(), clang::ImplicitValueInitExpr::ImplicitValueInitExpr(), clang::InitListExpr::InitListExpr(), clang::IntegerLiteral::IntegerLiteral(), clang::CallExpr::markDependentForPostponedNameLookup(), clang::InitListExpr::markError(), clang::MaterializeTemporaryExpr::MaterializeTemporaryExpr(), clang::MatrixSubscriptExpr::MatrixSubscriptExpr(), clang::MSPropertyRefExpr::MSPropertyRefExpr(), clang::MSPropertySubscriptExpr::MSPropertySubscriptExpr(), clang::NoInitExpr::NoInitExpr(), clang::ObjCAvailabilityCheckExpr::ObjCAvailabilityCheckExpr(), clang::ObjCBoolLiteralExpr::ObjCBoolLiteralExpr(), clang::ObjCBoxedExpr::ObjCBoxedExpr(), clang::ObjCEncodeExpr::ObjCEncodeExpr(), clang::ObjCIndirectCopyRestoreExpr::ObjCIndirectCopyRestoreExpr(), clang::ObjCIsaExpr::ObjCIsaExpr(), clang::ObjCIvarRefExpr::ObjCIvarRefExpr(), clang::ObjCPropertyRefExpr::ObjCPropertyRefExpr(), clang::ObjCPropertyRefExpr::ObjCPropertyRefExpr(), clang::ObjCPropertyRefExpr::ObjCPropertyRefExpr(), clang::ObjCPropertyRefExpr::ObjCPropertyRefExpr(), clang::ObjCPropertyRefExpr::ObjCPropertyRefExpr(), clang::ObjCProtocolExpr::ObjCProtocolExpr(), clang::ObjCSelectorExpr::ObjCSelectorExpr(), clang::ObjCStringLiteral::ObjCStringLiteral(), clang::ObjCSubscriptRefExpr::ObjCSubscriptRefExpr(), clang::OpaqueValueExpr::OpaqueValueExpr(), clang::OverloadExpr::OverloadExpr(), clang::PackExpansionExpr::PackExpansionExpr(), clang::ParenExpr::ParenExpr(), clang::CXXThisExpr::setCapturedByCopyInLambdaWithExplicitObjectParameter(), clang::DeclRefExpr::setCapturedByCopyInLambdaWithExplicitObjectParameter(), clang::DeclRefExpr::setDecl(), clang::InitListExpr::setInit(), clang::MemberExpr::setMemberDecl(), clang::ShuffleVectorExpr::ShuffleVectorExpr(), clang::SourceLocExpr::SourceLocExpr(), clang::StmtExpr::StmtExpr(), clang::SubstNonTypeTemplateParmExpr::SubstNonTypeTemplateParmExpr(), clang::SubstNonTypeTemplateParmPackExpr::SubstNonTypeTemplateParmPackExpr(), clang::UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(), clang::UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(), clang::UnaryOperator::UnaryOperator(), clang::CXXParenListInitExpr::updateDependence(), and clang::VAArgExpr::VAArgExpr().

◆ setObjectKind()

void clang::Expr::setObjectKind ( ExprObjectKind Cat )

inline

setObjectKind - Set the object kind produced by this expression.

Definition at line 464 of file Expr.h.

References clang::Stmt::ExprBits.

Referenced by clang::Sema::BuildDeclRefExpr(), and BuiltinCallWithStaticChain().

◆ setType()

void clang::Expr::setType ( QualType t )

inline

Definition at line 145 of file Expr.h.

References clang::QualType::isNull(), and clang::Type::isReferenceType().

Referenced by clang::Sema::BuildDeclRefExpr(), BuildExpressionFromNonTypeTemplateArgumentValue(), clang::Sema::BuildInitList(), clang::Sema::BuildMemberExpr(), clang::Sema::BuildResolvedCallExpr(), clang::Sema::BuildTemplateIdExpr(), clang::Sema::BuildVectorLiteral(), BuiltinAddressof(), BuiltinAlignment(), builtinAllocaAddrSpace(), BuiltinAnnotation(), clang::SemaARM::BuiltinARMMemoryTaggingCall(), BuiltinCallWithStaticChain(), clang::Sema::BuiltinElementwiseTernaryMath(), BuiltinIsWithinLifetime(), BuiltinLaunder(), BuiltinMaskedGather(), BuiltinMaskedLoad(), BuiltinMaskedScatter(), BuiltinMaskedStore(), clang::SemaPPC::BuiltinPPCMMACall(), BuiltinPreserveAI(), BuiltinTriviallyRelocate(), clang::Sema::BuiltinVectorToScalarMath(), clang::SemaPPC::BuiltinVSX(), clang::SemaWasm::BuiltinWasmRefNullExtern(), clang::SemaWasm::BuiltinWasmRefNullFunc(), clang::SemaWasm::BuiltinWasmTableGet(), clang::SemaWasm::BuiltinWasmTestFunctionPointerSignature(), clang::SemaARM::CheckARMBuiltinExclusiveCall(), CheckBoolSelect(), clang::SemaBPF::CheckBPFBuiltinFunctionCall(), clang::SemaHLSL::CheckBuiltinFunctionCall(), clang::SemaRISCV::CheckBuiltinFunctionCall(), clang::SemaSPIRV::CheckSPIRVBuiltinFunctionCall(), CheckVectorSelect(), clang::Sema::completeExprArrayBound(), ConvertMaskedBuiltinArgs(), clang::SemaOpenACC::CreateFirstPrivateInitRecipe(), CreateFunctionRefExpr(), clang::DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(), Expr(), clang::OverloadExpr::OverloadExpr(), clang::InitializationSequence::Perform(), clang::Sema::PrepareBuiltinElementwiseMathOneArgCall(), clang::DeclRefExpr::setDecl(), SetElementTypeAsReturnType(), clang::MemberExpr::setMemberDecl(), TryListConversion(), updateStringLiteralType(), and clang::ASTNodeImporter::VisitInitListExpr().

◆ setValueKind()

void clang::Expr::setValueKind ( ExprValueKind Cat )

inline

setValueKind - Set the value kind produced by this expression.

Definition at line 461 of file Expr.h.

References clang::Stmt::ExprBits.

Referenced by clang::Sema::BuildResolvedCallExpr(), BuiltinCallWithStaticChain(), clang::SemaHLSL::CheckBuiltinFunctionCall(), clang::InitializationSequence::Perform(), removeLValueToRValueCast(), updateGNUCompoundLiteralRValue(), and updateStringLiteralType().

◆ skipRValueSubobjectAdjustments() [1/2]

const Expr * clang::Expr::skipRValueSubobjectAdjustments ( ) const

inline

Definition at line 1020 of file Expr.h.

References Expr(), and skipRValueSubobjectAdjustments().

Referenced by skipRValueSubobjectAdjustments().

◆ skipRValueSubobjectAdjustments() [2/2]

const Expr * Expr::skipRValueSubobjectAdjustments	(	SmallVectorImpl< const Expr * > &	CommaLHS,
		SmallVectorImpl< SubobjectAdjustment > &	Adjustments ) const

Walk outwards from an expression we want to bind a reference to and find the expression whose lifetime needs to be extended.

Record the LHSs of comma expressions and adjustments needed along the path.

Definition at line 80 of file Expr.cpp.

References clang::Type::castAsCXXRecordDecl(), Expr(), clang::Type::getAs(), getType(), IgnoreParens(), and clang::Type::isRecordType().

Referenced by clang::CodeGen::CodeGenFunction::EmitMaterializeTemporaryExpr(), clang::CIRGen::CIRGenFunction::emitMaterializeTemporaryExpr(), clang::APValue::LValueBase::getType(), and clang::interp::Compiler< Emitter >::VisitMaterializeTemporaryExpr().

◆ tryEvaluateObjectSize()

bool Expr::tryEvaluateObjectSize	(	uint64_t &	Result,
		ASTContext &	Ctx,
		unsigned	Type ) const

If the current Expr is a pointer, this will try to statically determine the number of bytes available where the pointer is pointing.

Returns true if all of the above holds and we were able to figure out the size, false otherwise.

Parameters

Type	- How to evaluate the size of the Expr, as defined by the "type" parameter of __builtin_object_size

Definition at line 18840 of file ExprConstant.cpp.

References clang::ConstantFold, getType(), clang::Result, and tryEvaluateBuiltinObjectSize().

◆ tryEvaluateString()

std::optional< std::string > Expr::tryEvaluateString ( ASTContext & Ctx ) const

If the current Expr can be evaluated to a pointer to a null-terminated constant string, return the constant string (without the terminating null).

Definition at line 18902 of file ExprConstant.cpp.

References clang::ConstantFold, EvaluateBuiltinStrLen(), clang::interp::Context::evaluateString(), clang::ASTContext::getInterpContext(), and clang::Result.

Referenced by clang::CodeGen::CodeGenFunction::EmitBuiltinExpr().

◆ tryEvaluateStrLen()

bool Expr::tryEvaluateStrLen	(	uint64_t &	Result,
		ASTContext &	Ctx ) const

If the current Expr is a pointer, this will try to statically determine the strlen of the string pointed to.

Returns true if all of the above holds and we were able to figure out the strlen, false otherwise.

Definition at line 18991 of file ExprConstant.cpp.

References clang::ConstantFold, EvaluateBuiltinStrLen(), clang::interp::Context::evaluateStrlen(), clang::ASTContext::getInterpContext(), and clang::Result.

◆ ASTImporter

friend class ASTImporter

friend

Definition at line 140 of file Expr.h.

References ASTImporter.

Referenced by ASTImporter.

◆ ASTStmtReader

friend class ASTStmtReader

friend

Definition at line 141 of file Expr.h.

References ASTStmtReader.

Referenced by ASTStmtReader.

The documentation for this class was generated from the following files:

include/clang/AST/Expr.h
lib/AST/Expr.cpp
lib/AST/ExprClassification.cpp
lib/AST/ExprConstant.cpp

Classes

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ ConstantExprKind

◆ isModifiableLvalueResult

◆ LValueClassification

◆ NullPointerConstantKind

◆ NullPointerConstantValueDependence

◆ SideEffectsKind

Constructor & Destructor Documentation

◆ Expr() [1/5]

◆ Expr() [2/5]

◆ Expr() [3/5]

◆ Expr() [4/5]

◆ Expr() [5/5]

Member Function Documentation

◆ Classify()

◆ ClassifyLValue()

◆ ClassifyModifiable()

◆ classof()

◆ containsErrors()

◆ containsUnexpandedParameterPack()

◆ EvaluateAsBooleanCondition()

◆ EvaluateAsConstantExpr()

◆ EvaluateAsFixedPoint()

◆ EvaluateAsFloat()

◆ EvaluateAsInitializer()

◆ EvaluateAsInt()

◆ EvaluateAsLValue()

◆ EvaluateAsRValue()

◆ EvaluateCharRangeAsString() [1/2]

◆ EvaluateCharRangeAsString() [2/2]

◆ EvaluateForOverflow()

◆ EvaluateKnownConstInt()

◆ EvaluateKnownConstIntCheckOverflow()

◆ EvaluateWithSubstitution()

◆ findBoundMemberType()

◆ getAsBuiltinConstantDeclRef()

◆ getBestDynamicClassType()

◆ getBestDynamicClassTypeExpr()

◆ getDependence()

◆ getEnumCoercedType()

◆ getEnumConstantDecl() [1/2]

◆ getEnumConstantDecl() [2/2]

◆ getExprLoc()

◆ getFPFeaturesInEffect()

◆ getIntegerConstantExpr()

◆ getObjCProperty()

◆ getObjectKind()

◆ getReferencedDeclOfCallee() [1/2]

◆ getReferencedDeclOfCallee() [2/2]

◆ getSourceBitField() [1/2]

◆ getSourceBitField() [2/2]

◆ getType()

◆ getUnusedResultAttrImpl()

◆ getValueKind()

◆ getValueKindForType()

◆ hasAnyTypeDependentArguments()

◆ hasNonTrivialCall()

◆ hasPlaceholderType() [1/2]

◆ hasPlaceholderType() [2/2]

◆ HasSideEffects()

◆ IgnoreCasts() [1/2]

◆ IgnoreCasts() [2/2]

◆ IgnoreConversionOperatorSingleStep() [1/2]

◆ IgnoreConversionOperatorSingleStep() [2/2]

◆ IgnoreImpCasts() [1/2]

◆ IgnoreImpCasts() [2/2]

◆ IgnoreImplicit() [1/2]

◆ IgnoreImplicit() [2/2]

◆ IgnoreImplicitAsWritten() [1/2]

◆ IgnoreImplicitAsWritten() [2/2]

◆ IgnoreParenBaseCasts() [1/2]

◆ IgnoreParenBaseCasts() [2/2]