clang  6.0.0svn
Classes | Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | List of all members
clang::Expr Class Reference

Expr - This represents one expression. More...

#include "clang/AST/Expr.h"

Inherits clang::Stmt.

Inherited by clang::AbstractConditionalOperator, clang::AddrLabelExpr, clang::ArrayInitIndexExpr, clang::ArrayInitLoopExpr, clang::ArraySubscriptExpr, clang::ArrayTypeTraitExpr, clang::AsTypeExpr, clang::AtomicExpr, clang::BinaryOperator, clang::BlockExpr, clang::CallExpr, clang::CastExpr, clang::CharacterLiteral, clang::ChooseExpr, clang::CompoundLiteralExpr, clang::ConvertVectorExpr, clang::CoroutineSuspendExpr, 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::CXXPseudoDestructorExpr, clang::CXXScalarValueInitExpr, clang::CXXStdInitializerListExpr, clang::CXXThisExpr, clang::CXXThrowExpr, clang::CXXTypeidExpr, clang::CXXUnresolvedConstructExpr, clang::CXXUuidofExpr, clang::DeclRefExpr, clang::DependentCoawaitExpr, clang::DependentScopeDeclRefExpr, clang::DesignatedInitExpr, clang::DesignatedInitUpdateExpr, clang::ExpressionTraitExpr, clang::ExprWithCleanups, clang::ExtVectorElementExpr, clang::FloatingLiteral, clang::FunctionParmPackExpr, clang::GenericSelectionExpr, clang::GNUNullExpr, clang::ImaginaryLiteral, clang::ImplicitValueInitExpr, clang::InitListExpr, clang::IntegerLiteral, clang::LambdaExpr, clang::MaterializeTemporaryExpr, clang::MemberExpr, clang::MSPropertyRefExpr, clang::MSPropertySubscriptExpr, clang::NoInitExpr, 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::OMPArraySectionExpr, clang::OpaqueValueExpr, clang::OverloadExpr, clang::PackExpansionExpr, clang::ParenExpr, clang::ParenListExpr, clang::PredefinedExpr, clang::PseudoObjectExpr, clang::ShuffleVectorExpr, clang::SizeOfPackExpr, clang::StmtExpr, clang::StringLiteral, clang::SubstNonTypeTemplateParmExpr, clang::SubstNonTypeTemplateParmPackExpr, clang::TypeTraitExpr, clang::TypoExpr, clang::UnaryExprOrTypeTraitExpr, clang::UnaryOperator, and clang::VAArgExpr.

Collaboration diagram for clang::Expr:
Collaboration graph
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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  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 }
 
using child_iterator = StmtIterator
 Child Iterators: All subclasses must implement 'children' to permit easy iteration over the substatements/subexpessions of an AST node. More...
 
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

QualType getType () const
 
void setType (QualType t)
 
bool isValueDependent () const
 isValueDependent - Determines whether this expression is value-dependent (C++ [temp.dep.constexpr]). More...
 
void setValueDependent (bool VD)
 Set whether this expression is value-dependent or not. More...
 
bool isTypeDependent () const
 isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next. More...
 
void setTypeDependent (bool TD)
 Set whether this expression is type-dependent or not. More...
 
bool isInstantiationDependent () const
 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. More...
 
void setInstantiationDependent (bool ID)
 Set whether this expression is instantiation-dependent or not. More...
 
bool containsUnexpandedParameterPack () const
 Whether this expression contains an unexpanded parameter pack (for C++11 variadic templates). More...
 
void setContainsUnexpandedParameterPack (bool PP=true)
 Set the bit that describes whether this expression contains an unexpanded parameter pack. More...
 
SourceLocation getExprLoc () const LLVM_READONLY
 getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic expression. More...
 
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. More...
 
bool isLValue () const
 isLValue - True if this expression is an "l-value" according to the rules of the current language. More...
 
bool isRValue () const
 
bool isXValue () const
 
bool isGLValue () const
 
LValueClassification ClassifyLValue (ASTContext &Ctx) const
 Reasons why an expression might not be an l-value. More...
 
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. More...
 
Classification Classify (ASTContext &Ctx) const
 Classify - Classify this expression according to the C++11 expression taxonomy. More...
 
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. More...
 
ExprValueKind getValueKind () const
 getValueKind - The value kind that this expression produces. More...
 
ExprObjectKind getObjectKind () const
 getObjectKind - The object kind that this expression produces. More...
 
bool isOrdinaryOrBitFieldObject () const
 
void setValueKind (ExprValueKind Cat)
 setValueKind - Set the value kind produced by this expression. More...
 
void setObjectKind (ExprObjectKind Cat)
 setObjectKind - Set the object kind produced by this expression. More...
 
bool refersToBitField () const
 Returns true if this expression is a gl-value that potentially refers to a bit-field. More...
 
FieldDeclgetSourceBitField ()
 If this expression refers to a bit-field, retrieve the declaration of that bit-field. More...
 
const FieldDeclgetSourceBitField () const
 
DeclgetReferencedDeclOfCallee ()
 
const DeclgetReferencedDeclOfCallee () const
 
const ObjCPropertyRefExprgetObjCProperty () const
 If this expression is an l-value for an Objective C property, find the underlying property reference expression. More...
 
bool isObjCSelfExpr () const
 Check if this expression is the ObjC 'self' implicit parameter. More...
 
bool refersToVectorElement () const
 Returns whether this expression refers to a vector element. More...
 
bool refersToGlobalRegisterVar () const
 Returns whether this expression refers to a global register variable. More...
 
bool hasPlaceholderType () const
 Returns whether this expression has a placeholder type. More...
 
bool hasPlaceholderType (BuiltinType::Kind K) const
 Returns whether this expression has a specific placeholder type. More...
 
bool isKnownToHaveBooleanValue () const
 isKnownToHaveBooleanValue - Return true if this is an integer expression that is known to return 0 or 1. More...
 
bool isIntegerConstantExpr (llvm::APSInt &Result, const ASTContext &Ctx, SourceLocation *Loc=nullptr, bool isEvaluated=true) const
 isIntegerConstantExpr - Return true if this expression is a valid integer constant expression, and, if so, return its value in Result. More...
 
bool isIntegerConstantExpr (const ASTContext &Ctx, SourceLocation *Loc=nullptr) const
 
bool isCXX98IntegralConstantExpr (const ASTContext &Ctx) const
 isCXX98IntegralConstantExpr - Return true if this expression is an integral constant expression in C++98. More...
 
bool isCXX11ConstantExpr (const ASTContext &Ctx, APValue *Result=nullptr, SourceLocation *Loc=nullptr) const
 isCXX11ConstantExpr - Return true if this expression is a constant expression in C++11. More...
 
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. More...
 
bool EvaluateAsRValue (EvalResult &Result, const ASTContext &Ctx) 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. More...
 
bool EvaluateAsBooleanCondition (bool &Result, const ASTContext &Ctx) const
 EvaluateAsBooleanCondition - Return true if this is a constant which we we can fold and convert to a boolean condition using any crazy technique that we want to, even if the expression has side-effects. More...
 
bool EvaluateAsInt (llvm::APSInt &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) 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. More...
 
bool EvaluateAsFloat (llvm::APFloat &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) 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. More...
 
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. More...
 
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. More...
 
bool hasNonTrivialCall (const ASTContext &Ctx) const
 Determine whether this expression involves a call to any function that is not trivial. More...
 
llvm::APSInt EvaluateKnownConstInt (const ASTContext &Ctx, SmallVectorImpl< PartialDiagnosticAt > *Diag=nullptr) const
 EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded integer. More...
 
void EvaluateForOverflow (const ASTContext &Ctx) const
 
bool EvaluateAsLValue (EvalResult &Result, const ASTContext &Ctx) const
 EvaluateAsLValue - Evaluate an expression to see if we can fold it to an lvalue with link time known address, with no side-effects. More...
 
bool EvaluateAsInitializer (APValue &Result, const ASTContext &Ctx, const VarDecl *VD, SmallVectorImpl< PartialDiagnosticAt > &Notes) const
 EvaluateAsInitializer - Evaluate an expression as if it were the initializer of the given declaration. More...
 
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. More...
 
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. More...
 
NullPointerConstantKind isNullPointerConstant (ASTContext &Ctx, NullPointerConstantValueDependence NPC) const
 isNullPointerConstant - C99 6.3.2.3p3 - Test if this reduces down to a Null pointer constant. More...
 
bool isOBJCGCCandidate (ASTContext &Ctx) const
 isOBJCGCCandidate - Return true if this expression may be used in a read/ write barrier. More...
 
bool isBoundMemberFunction (ASTContext &Ctx) const
 Returns true if this expression is a bound member function. More...
 
ExprIgnoreImpCasts () LLVM_READONLY
 IgnoreImpCasts - Skip past any implicit casts which might surround this expression. More...
 
ExprIgnoreImplicit () LLVM_READONLY
 IgnoreImplicit - Skip past any implicit AST nodes which might surround this expression. More...
 
const ExprIgnoreImplicit () const LLVM_READONLY
 
ExprIgnoreParens () LLVM_READONLY
 IgnoreParens - Ignore parentheses. More...
 
ExprIgnoreParenCasts () LLVM_READONLY
 IgnoreParenCasts - Ignore parentheses and casts. More...
 
ExprIgnoreCasts () LLVM_READONLY
 Ignore casts. Strip off any CastExprs, returning their operand. More...
 
ExprIgnoreParenImpCasts () LLVM_READONLY
 IgnoreParenImpCasts - Ignore parentheses and implicit casts. More...
 
ExprIgnoreConversionOperator () LLVM_READONLY
 IgnoreConversionOperator - Ignore conversion operator. More...
 
const ExprIgnoreConversionOperator () const LLVM_READONLY
 
const ExprIgnoreParenImpCasts () const LLVM_READONLY
 
ExprIgnoreParenLValueCasts () LLVM_READONLY
 Ignore parentheses and lvalue casts. More...
 
const ExprIgnoreParenLValueCasts () const LLVM_READONLY
 
ExprIgnoreParenNoopCasts (ASTContext &Ctx) LLVM_READONLY
 IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the value (including ptr->int casts of the same size). More...
 
ExprignoreParenBaseCasts () LLVM_READONLY
 Ignore parentheses and derived-to-base casts. More...
 
const ExprignoreParenBaseCasts () const LLVM_READONLY
 
bool isDefaultArgument () const
 Determine whether this expression is a default function argument. More...
 
bool isTemporaryObject (ASTContext &Ctx, const CXXRecordDecl *TempTy) const
 Determine whether the result of this expression is a temporary object of the given class type. More...
 
bool isImplicitCXXThis () const
 Whether this expression is an implicit reference to 'this' in C++. More...
 
const ExprIgnoreImpCasts () const LLVM_READONLY
 
const ExprIgnoreParens () const LLVM_READONLY
 
const ExprIgnoreParenCasts () const LLVM_READONLY
 
const ExprIgnoreCasts () const LLVM_READONLY
 Strip off casts, but keep parentheses. More...
 
const ExprIgnoreParenNoopCasts (ASTContext &Ctx) const LLVM_READONLY
 
const CXXRecordDeclgetBestDynamicClassType () 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. More...
 
const ExprgetBestDynamicClassTypeExpr () const
 Get the inner expression that determines the best dynamic class. More...
 
const ExprskipRValueSubobjectAdjustments (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. More...
 
const ExprskipRValueSubobjectAdjustments () const
 
- 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 (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. More...
 
SourceLocation getLocStart () const LLVM_READONLY
 
SourceLocation getLocEnd () const LLVM_READONLY
 
void dump () const
 Dumps the specified AST fragment and all subtrees to llvm::errs(). More...
 
void dump (SourceManager &SM) const
 
void dump (raw_ostream &OS, SourceManager &SM) const
 
void dump (raw_ostream &OS) const
 
void dumpColor () const
 dumpColor - same as dump(), but forces color highlighting. More...
 
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. More...
 
void printPretty (raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, const ASTContext *Context=nullptr) const
 
void viewAST () const
 viewAST - Visualize an AST rooted at this Stmt* using GraphViz. More...
 
StmtIgnoreImplicit ()
 Skip past any implicit AST nodes which might surround this statement, such as ExprWithCleanups or ImplicitCastExpr nodes. More...
 
const StmtIgnoreImplicit () const
 
StmtIgnoreContainers (bool IgnoreCaptured=false)
 Skip no-op (attributed, compound) container stmts and skip captured stmt at the top, if IgnoreCaptured is true. More...
 
const StmtIgnoreContainers (bool IgnoreCaptured=false) const
 
const StmtstripLabelLikeStatements () const
 Strip off all label-like statements. More...
 
StmtstripLabelLikeStatements ()
 
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) const
 Produce a unique representation of the given statement. More...
 
void ProcessODRHash (llvm::FoldingSetNodeID &ID, ODRHash &Hash) const
 Calculate a unique representation for a statement that is stable across compiler invocations. More...
 

Static Public Member Functions

static ExprValueKind getValueKindForType (QualType T)
 getValueKindForType - Given a formal return or parameter type, give its value kind. More...
 
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. More...
 
static bool isPotentialConstantExprUnevaluated (Expr *E, const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags)
 isPotentialConstantExprUnevaluted - 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. More...
 
static QualType findBoundMemberType (const Expr *expr)
 Given an expression of bound-member type, find the type of the member. More...
 
static bool hasAnyTypeDependentArguments (ArrayRef< Expr *> Exprs)
 hasAnyTypeDependentArguments - Determines if any of the expressions in Exprs is type-dependent. More...
 
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 ()
 

Protected Member Functions

 Expr (StmtClass SC, QualType T, ExprValueKind VK, ExprObjectKind OK, bool TD, bool VD, bool ID, bool ContainsUnexpandedParameterPack)
 
 Expr (StmtClass SC, EmptyShell)
 Construct an empty expression. More...
 
- 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. More...
 

Additional Inherited Members

- Protected Types inherited from clang::Stmt
enum  { NumStmtBits = 8 }
 
enum  { NumExprBits = 17 }
 
enum  APFloatSemantics {
  IEEEhalf, IEEEsingle, IEEEdouble, x87DoubleExtended,
  IEEEquad, PPCDoubleDouble
}
 
- Protected Attributes inherited from clang::Stmt
union {
   StmtBitfields   StmtBits
 
   CompoundStmtBitfields   CompoundStmtBits
 
   IfStmtBitfields   IfStmtBits
 
   ExprBitfields   ExprBits
 
   CharacterLiteralBitfields   CharacterLiteralBits
 
   FloatingLiteralBitfields   FloatingLiteralBits
 
   UnaryExprOrTypeTraitExprBitfields   UnaryExprOrTypeTraitExprBits
 
   DeclRefExprBitfields   DeclRefExprBits
 
   CastExprBitfields   CastExprBits
 
   CallExprBitfields   CallExprBits
 
   ExprWithCleanupsBitfields   ExprWithCleanupsBits
 
   PseudoObjectExprBitfields   PseudoObjectExprBits
 
   ObjCIndirectCopyRestoreExprBitfields   ObjCIndirectCopyRestoreExprBits
 
   InitListExprBitfields   InitListExprBits
 
   TypeTraitExprBitfields   TypeTraitExprBits
 
   CoawaitExprBitfields   CoawaitBits
 
}; 
 

Detailed Description

Expr - 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 106 of file Expr.h.

Member Enumeration Documentation

◆ 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 269 of file Expr.h.

◆ 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 254 of file Expr.h.

◆ 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 673 of file Expr.h.

◆ 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 696 of file Expr.h.

◆ 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 594 of file Expr.h.

Constructor & Destructor Documentation

◆ Expr() [1/2]

clang::Expr::Expr ( StmtClass  SC,
QualType  T,
ExprValueKind  VK,
ExprObjectKind  OK,
bool  TD,
bool  VD,
bool  ID,
bool  ContainsUnexpandedParameterPack 
)
inlineprotected

◆ Expr() [2/2]

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

Construct an empty expression.

Definition at line 125 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 377 of file Expr.h.

Referenced by clang::canTypeidThrow(), ClassifyLValue(), TryReferenceInit(), and TryReferenceInitializationCore().

◆ ClassifyLValue()

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

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

Definition at line 389 of file Expr.h.

Referenced by isModifiableLvalue().

◆ classof()

static bool clang::Expr::classof ( const Stmt T)
inlinestatic

Definition at line 853 of file Expr.h.

References clang::Stmt::getStmtClass().

◆ containsUnexpandedParameterPack()

bool clang::Expr::containsUnexpandedParameterPack ( ) const
inline

◆ EvaluateAsBooleanCondition()

bool Expr::EvaluateAsBooleanCondition ( bool Result,
const ASTContext Ctx 
) const

EvaluateAsBooleanCondition - Return true if this is a constant which we 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 10072 of file ExprConstant.cpp.

References EvaluateAsRValue(), and HandleConversionToBool().

Referenced by CheckNonNullExpr(), and FindTypeTagExpr().

◆ EvaluateAsFloat()

bool Expr::EvaluateAsFloat ( llvm::APFloat &  Result,
const ASTContext Ctx,
SideEffectsKind  AllowSideEffects = SE_NoSideEffects 
) 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 10099 of file ExprConstant.cpp.

References EvaluateAsRValue(), and hasUnacceptableSideEffect().

◆ EvaluateAsInitializer()

bool Expr::EvaluateAsInitializer ( APValue Result,
const ASTContext Ctx,
const VarDecl VD,
SmallVectorImpl< PartialDiagnosticAt > &  Notes 
) 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 10126 of file ExprConstant.cpp.

References CheckConstantExpression(), clang::Expr::EvalStatus::Diag, EvaluateInPlace(), clang::ASTContext::getLangOpts(), clang::Decl::getLocation(), clang::ValueDecl::getType(), clang::VarDecl::hasLocalStorage(), clang::Expr::EvalStatus::HasSideEffects, clang::VarDecl::isConstexpr(), isRecordType(), and clang::Type::isReferenceType().

◆ EvaluateAsInt()

bool Expr::EvaluateAsInt ( llvm::APSInt &  Result,
const ASTContext Ctx,
SideEffectsKind  AllowSideEffects = SE_NoSideEffects 
) const

◆ EvaluateAsLValue()

bool Expr::EvaluateAsLValue ( EvalResult Result,
const ASTContext Ctx 
) 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 10113 of file ExprConstant.cpp.

References CheckLValueConstantExpression(), EvaluateLValue(), and clang::ASTContext::getLValueReferenceType().

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

◆ EvaluateAsRValue()

bool Expr::EvaluateAsRValue ( EvalResult Result,
const ASTContext Ctx 
) 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 the expression is a glvalue, an lvalue-to-rvalue conversion will be applied.

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.

Definition at line 10063 of file ExprConstant.cpp.

References EvaluateAsRValue(), and FastEvaluateAsRValue().

Referenced by CheckEvalInICE(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), EvaluateBuiltinConstantP(), clang::Sema::FillInlineAsmIdentifierInfo(), GetExprRange(), isNullPointerValueTemplateArgument(), clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue(), clang::CodeGen::CodeGenFunction::tryEmitAsConstant(), and clang::CodeGen::ConstantEmitter::tryEmitPrivate().

◆ EvaluateForOverflow()

void Expr::EvaluateForOverflow ( const ASTContext Ctx) const

Definition at line 10187 of file ExprConstant.cpp.

References EvaluateAsRValue(), and FastEvaluateAsRValue().

◆ EvaluateKnownConstInt()

APSInt Expr::EvaluateKnownConstInt ( const ASTContext Ctx,
SmallVectorImpl< PartialDiagnosticAt > *  Diag = nullptr 
) 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 10175 of file ExprConstant.cpp.

References Diag(), and EvaluateAsRValue().

Referenced by clang::Sema::ActOnOpenMPCriticalDirective(), EvaluateSwitch(), isNullPointerConstant(), IsStandardConversion(), mergeExceptionSpecs(), tryEvaluateBuiltinObjectSize(), TryOCLZeroEventInitialization(), and TryOCLZeroQueueInitialization().

◆ 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 10719 of file ExprConstant.cpp.

◆ 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 2408 of file Expr.cpp.

References clang::Type::castAs(), hasPlaceholderType(), IgnoreParens(), clang::Type::isFunctionType(), and clang::ast_matchers::type.

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

◆ 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 63 of file Expr.cpp.

Referenced by clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(), and clang::CXXMethodDecl::getDevirtualizedMethod().

◆ 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 38 of file Expr.cpp.

Referenced by clang::CXXMethodDecl::getDevirtualizedMethod().

◆ getExprLoc()

SourceLocation Expr::getExprLoc ( ) const

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

Definition at line 216 of file Expr.cpp.

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

Referenced by clang::Sema::ActOnFinishFullExpr(), clang::Sema::ActOnOpenMPAtomicDirective(), clang::Sema::ActOnOpenMPIsDevicePtrClause(), clang::Sema::ActOnSEHExceptBlock(), clang::Sema::ActOnStartLinkageSpecification(), AddVariableConstraints(), AnalyzeBitFieldAssignment(), buildCapture(), buildCaptureDecl(), clang::Sema::BuildCXXNoexceptExpr(), clang::Sema::BuildOverloadedArrowExpr(), clang::Sema::BuildOverloadedCallExpr(), buildPostUpdate(), BuildRecoveryCallExpr(), clang::Sema::BuildResolvedCallExpr(), CheckedIntArithmetic(), CheckForDanglingReferenceOrPointer(), CheckForReference(), checkIndirectCopyRestoreSource(), CheckKeyForObjCARCConversion(), CheckMapClauseExpressionBase(), CheckMapConflicts(), clang::Sema::CheckObjCConversion(), clang::Sema::CheckOMPThreadPrivateDecl(), CheckOpenMPLoop(), clang::Sema::CheckSubscriptingKind(), CheckTemplateArgumentAddressOfObjectOrFunction(), CheckTemplateArgumentPointerToMember(), clang::Sema::CodeCompleteCall(), clang::Sema::DeduceFunctionTypeFromReturnExpr(), clang::Sema::DiagnoseAlwaysNonNullPointer(), clang::Sema::DiagnoseAssignmentEnum(), DiagnoseImpCast(), clang::Sema::DiagnoseMultipleUserDefinedConversion(), diagnoseNoViableConversion(), DiagnoseNullConversion(), diagnoseObjCARCConversion(), diagnoseRetainCycle(), clang::CodeGen::ConstantEmitter::emitAbstract(), clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(), clang::CodeGen::emitDoacrossInit(), clang::CodeGen::emitDoacrossOrdered(), EmitObjectDelete(), clang::CodeGen::CodeGenFunction::EmitOMPLinearClauseInit(), clang::CodeGen::CodeGenFunction::EmitScalarInit(), EvaluateAsRValue(), EvaluateCPlusPlus11IntegralConstantExpr(), fillAttributedTypeLoc(), findCompleteObject(), clang::CodeGen::CodeGenFunction::GenerateCXXGlobalVarDeclInitFunc(), clang::OMPArraySectionExpr::getExprLoc(), clang::CXXMemberCallExpr::getExprLoc(), clang::OpaqueValueExpr::getExprLoc(), getPrivateItem(), getSizeOfArgType(), GetTypeOfFunction(), clang::consumed::ConsumedStmtVisitor::handleCall(), HandleConstructorCall(), HandleLValueArrayAdjustment(), HandleLValueComplexElement(), HasLocalVariableExternalStorage(), HasSideEffects(), isIdenticalStmt(), isLibstdcxxPointerReturnFalseHack(), IsNonNegativeIntegerValue(), isNullPointerValueTemplateArgument(), IsTailPaddedMemberArray(), isUnusedResultAWarning(), IsUserDefinedConversion(), clang::Sema::MakeFullDiscardedValueExpr(), clang::Sema::MakeFullExpr(), NoteLValueLocation(), recordConversion(), rewriteToNumericBoxedExpression(), clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue(), tryEvaluateBuiltinObjectSize(), TryUserDefinedConversion(), warnOnLifetimeExtension(), and clang::threadSafety::ThreadSafetyHandler::~ThreadSafetyHandler().

◆ 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 3392 of file Expr.cpp.

◆ 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 412 of file Expr.h.

Referenced by buildCapture(), buildCaptureDecl(), CheckIncrementDecrementOperand(), clang::PseudoObjectExpr::Create(), clang::Sema::CXXCheckConditionalOperands(), clang::DesignatedInitExpr::Designator::getFieldName(), clang::LambdaExpr::isMutable(), and clang::TreeTransform< Derived >::RebuildCXXOperatorCallExpr().

◆ getReferencedDeclOfCallee() [1/2]

Decl * Expr::getReferencedDeclOfCallee ( )

Definition at line 1224 of file Expr.cpp.

References IgnoreParenCasts(), and IgnoreParenImpCasts().

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

◆ getReferencedDeclOfCallee() [2/2]

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

Definition at line 453 of file Expr.h.

◆ 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 3430 of file Expr.cpp.

Referenced by AnalyzeAssignment().

◆ getSourceBitField() [2/2]

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

Definition at line 448 of file Expr.h.

◆ getType()

QualType clang::Expr::getType ( ) const
inline

Definition at line 128 of file Expr.h.

Referenced by clang::Sema::ActOnCastExpr(), clang::Sema::ActOnFinishSwitchStmt(), clang::Sema::ActOnIndirectGotoStmt(), clang::Sema::ActOnObjCAtSynchronizedOperand(), clang::Sema::ActOnOpenMPAtomicDirective(), clang::Sema::ActOnOpenMPLinearClause(), clang::Sema::ActOnSEHExceptBlock(), clang::Sema::ActOnStartCXXMemberReference(), addOrSubLValueAsInteger(), AddVariableConstraints(), AdjustFunctionParmAndArgTypesForDeduction(), AnalyzeBitFieldAssignment(), AnalyzeComparison(), AnalyzeImplicitConversions(), clang::Sema::BuildAnonymousStructUnionMemberReference(), clang::Sema::BuildBinOp(), clang::Sema::BuildCallToMemberFunction(), buildCapture(), buildCaptureDecl(), clang::Sema::BuildExpressionTrait(), clang::Sema::BuildForRangeBeginEndCall(), clang::Sema::BuildInstanceMessage(), clang::Sema::BuildMemberReferenceExpr(), buildMemcpyForAssignmentOp(), BuildNonArrayForRange(), clang::Sema::BuildObjCAtThrowStmt(), clang::Sema::BuildObjCBridgedCast(), clang::Sema::BuildObjCNumericLiteral(), clang::Sema::BuildOverloadedArrowExpr(), BuildOverloadedBinOp(), clang::canTypeidThrow(), CastForMoving(), clang::Sema::CheckAdditionOperands(), CheckAggExprForMemSetUse(), checkArithmeticBinOpPointerOperands(), checkArithmeticIncompletePointerType(), checkArithmeticOpPointerOperand(), CheckArrow(), clang::Sema::CheckAssignmentOperands(), checkBuiltinArgument(), clang::Sema::CheckCastAlign(), checkCondition(), CheckConditionalOperand(), CheckConditionalOperator(), checkConditionalVoidType(), CheckConvertedConstantExpression(), CheckCXX98CompatAccessibleCopy(), clang::Sema::checkDeclIsAllowedInOpenMPTarget(), CheckedIntArithmetic(), checkElementNonNil(), checkEnumComparison(), clang::Sema::CheckExceptionSpecCompatibility(), clang::Sema::checkExceptionSpecification(), clang::Sema::CheckExtVectorCast(), CheckFallThroughForBody(), CheckICE(), CheckImplicitArgumentConversions(), CheckImplicitConversion(), CheckIncrementDecrementOperand(), CheckIndirectionOperand(), checkIntToPointerCast(), CheckKeyForObjCARCConversion(), CheckLiteralType(), CheckMapClauseExpressionBase(), clang::Sema::CheckMemberOperatorAccess(), clang::Sema::CheckMemberPointerConversion(), clang::ento::mpi::MPIChecker::checkMissingWaits(), CheckMoveOnConstruction(), CheckNonNullExpr(), CheckObjCBridgeCFCast(), CheckObjCBridgeNSCast(), clang::Sema::CheckObjCBridgeRelatedCast(), CheckObjCCollectionLiteralElement(), checkObjCCollectionLiteralElement(), clang::Sema::CheckObjCConversion(), clang::Sema::CheckObjCForCollectionOperand(), checkObjCPointerIntrospection(), checkOpenCLConditionVector(), checkOpenCLEnqueueIntType(), checkOpenCLEnqueueVariadicArgs(), checkOpenCLPipeArg(), checkOpenCLPipePacketType(), clang::Sema::CheckPlaceholderExpr(), clang::Sema::CheckPointerConversion(), checkPointerIntegerMismatch(), clang::Sema::CheckSubscriptingKind(), CheckTautologicalComparison(), CheckTemplateArgumentAddressOfObjectOrFunction(), CheckTemplateArgumentIsCompatibleWithParameter(), CheckTemplateArgumentPointerToMember(), clang::Sema::CheckTollFreeBridgeCast(), clang::Sema::CheckTollFreeBridgeStaticCast(), clang::Sema::checkUnsafeExprAssigns(), ClassifyConditional(), clang::Sema::CodeCompleteCall(), clang::Sema::CodeCompleteCase(), clang::Sema::CodeCompleteMemberReferenceExpr(), clang::Sema::CodeCompleteObjCInstanceMessage(), computeDeclRefDependence(), conjureOffsetSymbolOnLocation(), clang::ento::SymbolManager::conjureSymbol(), clang::ento::SValBuilder::conjureSymbolVal(), CopyObject(), clang::CXXBindTemporaryExpr::Create(), createBinOpInfoFromIncDec(), clang::Sema::CreateBuiltinArraySubscriptExpr(), clang::Sema::CreateBuiltinBinOp(), createReferenceTemporary(), clang::Sema::CXXCheckConditionalOperands(), clang::Sema::DeduceAutoType(), clang::Sema::DeduceFunctionTypeFromReturnExpr(), DeduceNonTypeTemplateArgument(), DeduceNullPtrTemplateArgument(), DeduceTemplateArgumentsFromCallArgument(), clang::DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(), clang::TypeOfExprType::desugar(), diagnoseArithmeticOnFunctionPointer(), diagnoseArithmeticOnTwoFunctionPointers(), clang::Sema::DiagnoseAutoDeductionFailure(), DiagnoseBinOpPrecedence(), DiagnoseForRangeConstVariableCopies(), DiagnoseForRangeVariableCopies(), DiagnoseImpCast(), clang::Sema::DiagnoseMultipleUserDefinedConversion(), diagnoseObjCARCConversion(), DiagnoseOutOfRangeComparison(), diagnosePointerIncompatibility(), DiagnoseReinterpretUpDownCast(), DiagnoseSelfAssignment(), clang::Sema::DiagnoseSelfMove(), diagnoseStringPlusChar(), diagnoseStringPlusInt(), diagnoseUnreadableFields(), doRewriteToUTF8StringBoxedExpressionHelper(), clang::CodeGen::CodeGenFunction::EmitAggExpr(), clang::CodeGen::CodeGenFunction::EmitAggExprToLValue(), clang::CodeGen::CodeGenFunction::EmitAnyExprToExn(), clang::CodeGen::CodeGenFunction::EmitARCExtendBlockObject(), clang::CodeGen::CodeGenFunction::EmitARCRetainAutoreleaseScalarExpr(), clang::CodeGen::CodeGenFunction::EmitARCRetainScalarExpr(), clang::CodeGen::CodeGenFunction::EmitARCStoreStrong(), clang::CodeGen::CodeGenFunction::EmitAtomicInit(), emitBadConversionNotes(), clang::CodeGen::CodeGenFunction::EmitBuiltinExpr(), EmitCommonNeonSISDBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitComplexExpr(), clang::CodeGen::CodeGenFunction::EmitComplexExprIntoLValue(), clang::CodeGen::CodeGenFunction::EmitConditionalOperatorLValue(), emitCXXDestructor(), clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(), EmitCXXNewAllocSize(), clang::CodeGen::emitDoacrossInit(), clang::CodeGen::emitDoacrossOrdered(), clang::CodeGen::CodeGenFunction::EmitDynamicCast(), emitEmptyOrdered(), clang::CodeGen::CodeGenFunction::EmitMSVCBuiltinExpr(), emitNumThreadsForTargetDirective(), clang::CodeGen::CodeGenFunction::EmitNVPTXBuiltinExpr(), clang::CodeGen::CodeGenFunction::EmitObjCIsaExpr(), clang::CodeGen::CodeGenFunction::EmitObjCThrowOperand(), EmitOMPAtomicCaptureExpr(), EmitOMPAtomicReadExpr(), clang::CodeGen::CodeGenFunction::EmitOMPFlushDirective(), clang::CodeGen::CodeGenFunction::EmitOMPLinearClauseInit(), clang::CodeGen::CodeGenFunction::EmitOMPWorksharingLoop(), emitPointerArithmetic(), clang::CodeGen::CodeGenFunction::EmitScalarExpr(), clang::CodeGen::emitSingleReductionCombiner(), clang::CodeGen::emitTaskCall(), emitTaskPrivateMappingFunction(), clang::CodeGen::emitThreadPrivateVarDefinition(), clang::CodeGen::CodeGenFunction::EmitVAArg(), clang::CodeGen::CodeGenFunction::EmitWebAssemblyBuiltinExpr(), emitWritebackArg(), EvalAddr(), EvalAndBitcastToAPInt(), clang::ento::StoreManager::evalDerivedToBase(), Evaluate(), EvaluateArray(), EvaluateAsRValue(), EvaluateAtomic(), EvaluateBuiltinClassifyType(), EvaluateBuiltinConstantP(), EvaluateComplex(), EvaluateCPlusPlus11IntegralConstantExpr(), EvaluateFloat(), EvaluateInPlace(), EvaluateInteger(), EvaluateIntegerOrLValue(), EvaluateLValue(), evaluateLValueAsAllocSize(), EvaluateMemberPointer(), EvaluateObjectArgument(), EvaluatePointer(), EvaluateRecord(), EvaluateTemporary(), EvaluateVector(), EvaluateVoid(), FastEvaluateAsRValue(), clang::Sema::FillInlineAsmIdentifierInfo(), clang::Sema::FindAssociatedClassesAndNamespaces(), clang::Sema::FindCompositePointerType(), finishContextualImplicitConversion(), FinishForRangeVarDecl(), clang::Sema::GatherArgumentsForCall(), clang::CodeGen::CodeGenFunction::GenerateObjCAtomicGetterCopyHelperFunction(), clang::CodeGen::CodeGenFunction::generateObjCSetterBody(), GetAlignOfExpr(), clang::CXXNewExpr::getAllocatedType(), getArrayIndexingBound(), getAsInt32(), clang::OMPArraySectionExpr::getBaseOriginalType(), clang::CallExpr::getCallReturnType(), GetCFNumberSize(), clang::CXXDeleteExpr::getDestroyedType(), clang::CXXMethodDecl::getDevirtualizedMethod(), GetExprType(), clang::CXXInstanceCall::getExtraInvalidatedValues(), clang::BlockExpr::getFunctionType(), getIncrementedVar(), clang::ento::ExprEngine::getInitialState(), GetIntrinsic(), clang::MemberExpr::getLocEnd(), clang::CodeGen::CodeGenModule::getMemberPointerConstant(), clang::StandardConversionSequence::getNarrowingKind(), clang::TemplateArgument::getNonTypeTemplateArgumentType(), clang::ExtVectorElementExpr::getNumElements(), getObjectType(), clang::CodeGen::CGOpenCLRuntime::getPipeElemAlign(), clang::CodeGen::CGOpenCLRuntime::getPipeElemSize(), clang::CXXMemberCallExpr::getRecordDecl(), clang::CodeGen::CodeGenFunction::ConstantEmission::getReferenceLValue(), GetReturnType(), getReturnTypeForMethod(), clang::CallEventManager::getSimpleCall(), getSizeOfArgType(), getStrlenExprArg(), getThrowFn(), clang::ASTContext::getTypeOfExprType(), clang::ento::StringRegion::getValueType(), clang::ento::ObjCStringRegion::getValueType(), clang::ento::CompoundLiteralRegion::getValueType(), clang::ento::CXXTempObjectRegion::getValueType(), clang::AtomicExpr::getValueType(), clang::Sema::getVariadicCallType(), HandleBaseToDerivedCast(), HandleConstructorCall(), handleIntIntBinOp(), handleLValueToRValueConversion(), clang::ento::ExprEngine::handleLVectorSplat(), HandleMemberPointerAccess(), clang::Sema::hasCStrMethod(), hasDefinition(), HasEnumType(), hasIsEqualMethod(), clang::Sema::IgnoredValueConversions(), ignorePointerCastsAndParens(), clang::BadConversionSequence::init(), clang::Sema::InvalidLogicalVectorOperands(), clang::CXXDynamicCastExpr::isAlwaysNull(), isBlockPointer(), isBlockVarRef(), isCheapEnoughToEvaluateUnconditionally(), isConstantInitializer(), IsImplicitBoolFloatConversion(), isImplicitThis(), isIntOrBool(), isInvalidICRSource(), clang::LambdaExpr::isMutable(), isNonBooleanIntegerValue(), isNonBooleanUnsignedValue(), clang::BinaryOperator::isNullPointerArithmeticExtension(), isNullPointerConstant(), isNullPointerValueTemplateArgument(), isPointerToConst(), isShiftOverflow(), isSimpleZero(), IsStandardConversion(), IsStdFunction(), clang::InitListExpr::isStringLiteralInit(), IsTailPaddedMemberArray(), isTemporaryObject(), isThrowCaught(), clang::InitListExpr::isTransparent(), IsTransparentUnionStandardConversion(), isTrivialFiller(), IsTypeLimit(), isUnusedResultAWarning(), IsUserDefinedConversion(), isValidOrderingForOp(), LookupMethodInReceiverType(), clang::ento::SValBuilder::makeIntVal(), maybeAdjustInterfaceForSubscriptingCheck(), clang::Sema::MaybeBindToTemporary(), maybeRebuildARCConsumingStmt(), clang::CodeGen::CodeGenModule::maybeSetTrivialComdat(), clang::Sema::NoteAllOverloadCandidates(), ObjCEnumerationCollection(), objectifyExpr(), clang::ento::ConditionBRVisitor::patternMatch(), clang::InitializationSequence::Perform(), clang::Sema::PerformContextualImplicitConversion(), performLifetimeExtension(), clang::Sema::PerformMemberExprBaseConversion(), clang::Sema::PerformMoveOrCopyInitialization(), clang::Sema::prepareVectorSplat(), print_elem(), printExprAsWritten(), PrintFloatingLiteral(), clang::ento::ExprEngine::ProcessInitializer(), clang::ento::ExprEngine::ProcessTemporaryDtor(), clang::TreeTransform< Derived >::RebuildCXXForRangeStmt(), clang::TreeTransform< Derived >::RebuildCXXOperatorCallExpr(), clang::TreeTransform< Derived >::RebuildCXXPseudoDestructorExpr(), clang::TreeTransform< Derived >::RebuildExtVectorElementExpr(), clang::TreeTransform< Derived >::RebuildObjCIvarRefExpr(), clang::TreeTransform< Derived >::RebuildObjCMessageExpr(), clang::TreeTransform< Derived >::RebuildObjCPropertyRefExpr(), recordFixedType(), RecoverCastedSymbol(), clang::Sema::ResolveAddressOfOverloadedFunction(), ResolveConstructorOverload(), rewriteToNumberLiteral(), rewriteToNumericBoxedExpression(), scanToNextArgument(), SemaBuiltinCommitRWPipe(), SemaBuiltinPipePackets(), SemaBuiltinReserveRWPipe(), SemaBuiltinRWPipe(), clang::Sema::SemaBuiltinShuffleVector(), clang::Sema::SemaConvertVectorExpr(), SemaOpenCLBuiltinEnqueueKernel(), SemaOpenCLBuiltinToAddr(), clang::CodeGen::CodeGenFunction::OpaqueValueMappingData::shouldBindAsLValue(), shouldEmitSeparateBlockRetain(), shouldExtendReceiverForInnerPointerMessage(), clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue(), sumOffsets(), clang::TreeTransform< Derived >::TransformCXXNamedCastExpr(), clang::TreeTransform< Derived >::TransformDependentScopeDeclRefExpr(), TryClassUnification(), tryEmitARCCopyWeakInit(), tryEmitARCRetainLoadOfScalar(), clang::CodeGen::CodeGenFunction::tryEmitAsConstant(), tryEmitFMulAdd(), TryImplicitConversion(), TryListConversion(), TryListInitialization(), TryLValueToRValueCast(), tryObjCWritebackConversion(), TryOCLSamplerInitialization(), TryReferenceInit(), TryReferenceInitialization(), TryReferenceListInitialization(), TryRefInitWithConversionFunction(), TryStaticReferenceDowncast(), tryToConvertMemberExprToDeclRefExpr(), TryUserDefinedConversion(), clang::ento::ExprEngine::VisitBlockExpr(), clang::ento::ConditionBRVisitor::VisitConditionVariable(), clang::ento::ExprEngine::VisitCXXConstructExpr(), clang::ASTNodeImporter::VisitCXXNewExpr(), clang::ento::ExprEngine::VisitCXXNewExpr(), clang::ASTNodeImporter::VisitCXXTemporaryObjectExpr(), clang::ento::ExprEngine::VisitCXXThisExpr(), clang::ASTNodeImporter::VisitInitListExpr(), clang::ento::ExprEngine::VisitInitListExpr(), clang::ento::ExprEngine::VisitLogicalExpr(), clang::ento::ExprEngine::VisitLvalArraySubscriptExpr(), clang::ASTNodeImporter::VisitOffsetOfExpr(), clang::ento::ExprEngine::VisitOffsetOfExpr(), warnBracedScalarInit(), and WidenIterationCount().

◆ getValueKind()

ExprValueKind clang::Expr::getValueKind ( ) const
inline

◆ getValueKindForType()

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

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

Definition at line 395 of file Expr.h.

References clang::Type::getAs(), clang::VK_LValue, clang::VK_RValue, and clang::VK_XValue.

Referenced by clang::Sema::BuildCXXTypeConstructExpr(), EvaluateBinaryTypeTrait(), and clang::TreeTransform< Derived >::RebuildShuffleVectorExpr().

◆ hasAnyTypeDependentArguments()

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

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

Definition at line 2743 of file Expr.cpp.

Referenced by clang::Sema::BuildCXXTypeConstructExpr(), clang::Sema::CodeCompleteCall(), and clang::Sema::DeduceTemplateSpecializationFromInitializer().

◆ 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 3261 of file Expr.cpp.

◆ hasPlaceholderType() [1/2]

bool clang::Expr::hasPlaceholderType ( ) const
inline

◆ hasPlaceholderType() [2/2]

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

Returns whether this expression has a specific placeholder type.

Definition at line 477 of file Expr.h.

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

◆ 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 2940 of file Expr.cpp.

References getExprLoc(), clang::Stmt::getStmtClass(), clang::Decl::hasAttr(), isInstantiationDependent(), and clang::Stmt::NoStmtClass.

Referenced by clang::Sema::BuildCXXNoexceptExpr(), clang::Sema::CaptureHasSideEffects(), clang::Sema::CreateGenericSelectionExpr(), clang::ASTContext::DeclMustBeEmitted(), HandleConstructorCall(), isBlockVarRef(), isConstantInitializer(), isIdenticalStmt(), and tryEvaluateBuiltinObjectSize().

◆ IgnoreCasts() [1/2]

Expr * Expr::IgnoreCasts ( )

Ignore casts. Strip off any CastExprs, returning their operand.

Definition at line 2485 of file Expr.cpp.

◆ IgnoreCasts() [2/2]

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

Strip off casts, but keep parentheses.

Definition at line 817 of file Expr.h.

◆ IgnoreConversionOperator() [1/2]

Expr * Expr::IgnoreConversionOperator ( )

IgnoreConversionOperator - Ignore conversion operator.

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

Definition at line 2572 of file Expr.cpp.

◆ IgnoreConversionOperator() [2/2]

const Expr* clang::Expr::IgnoreConversionOperator ( ) const
inline

Definition at line 763 of file Expr.h.

◆ IgnoreImpCasts() [1/2]

Expr * clang::Expr::IgnoreImpCasts ( )
inline

◆ IgnoreImpCasts() [2/2]

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

Definition at line 807 of file Expr.h.

◆ IgnoreImplicit() [1/2]

Expr* clang::Expr::IgnoreImplicit ( )
inline

◆ IgnoreImplicit() [2/2]

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

Definition at line 738 of file Expr.h.

◆ ignoreParenBaseCasts() [1/2]

Expr * Expr::ignoreParenBaseCasts ( )

Ignore parentheses and derived-to-base casts.

Definition at line 2533 of file Expr.cpp.

Referenced by clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(), and clang::CXXInstanceCall::getExtraInvalidatedValues().

◆ ignoreParenBaseCasts() [2/2]

const Expr* clang::Expr::ignoreParenBaseCasts ( ) const
inline

Definition at line 787 of file Expr.h.

◆ IgnoreParenCasts() [1/2]

Expr * Expr::IgnoreParenCasts ( )

IgnoreParenCasts - Ignore parentheses and casts.

Strip off any ParenExpr or CastExprs, returning their operand.

Strip off any ParenExpr or CastExprs or ImplicitCastExprs, returning their operand.

Definition at line 2463 of file Expr.cpp.

Referenced by clang::Sema::CheckAdditionOperands(), checkBuiltinArgument(), clang::Sema::CheckCompareOperands(), checkFormatStringExpr(), CheckIndirectionOperand(), checkObjCPointerIntrospection(), clang::Sema::checkStringLiteralArgumentAttr(), CheckTemplateArgumentAddressOfObjectOrFunction(), checkVAStartIsInVariadicFunction(), clang::Sema::CodeCompleteCall(), clang::Sema::CodeCompleteCase(), diagnoseObjCLiteralComparison(), EmitX86SExtMask(), findCapturingExpr(), FindTypeTagExpr(), getAsPointeeSymbol(), getIncrementedVar(), getNSArrayObjects(), getReferencedDeclOfCallee(), getStrlenExprArg(), HandleConstructorCall(), ignoreLiteralAdditions(), isCapturedBy(), isEnableIf(), clang::BinaryOperator::isNullPointerArithmeticExtension(), isShiftOverflow(), IsStandardConversion(), IsTailPaddedMemberArray(), isTrivialExpression(), isValidOrderingForOp(), LookThroughTransitiveAssignmentsAndCommaOperators(), LookupMemberExpr(), clang::sema::FunctionScopeInfo::markSafeWeakUse(), maybeAdjustInterfaceForSubscriptingCheck(), clang::ento::ConditionBRVisitor::patternMatch(), peelOffOuterExpr(), clang::TreeTransform< Derived >::RebuildCXXOperatorCallExpr(), RemoveSelectorFromWarningCache(), UseNSOptionsMacro(), clang::ento::FindLastStoreBRVisitor::VisitNode(), and clang::ento::ConditionBRVisitor::VisitTrueTest().

◆ IgnoreParenCasts() [2/2]

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

Definition at line 813 of file Expr.h.

◆ IgnoreParenImpCasts() [1/2]

Expr * Expr::IgnoreParenImpCasts ( )

IgnoreParenImpCasts - Ignore parentheses and implicit casts.

Strip off any ParenExpr or ImplicitCastExprs, returning their operand.

Definition at line 2550 of file Expr.cpp.

Referenced by clang::Sema::ActOnOpenMPAtomicDirective(), clang::Sema::ActOnOpenMPDeclareSimdDirective(), AnalyzeAssignment(), AnalyzeBitFieldAssignment(), AnalyzeComparison(), AnalyzeImplicitConversions(), CheckBoolLikeConversion(), CheckConditionalOperand(), CheckConditionalOperator(), checkEnumComparison(), CheckForDanglingReferenceOrPointer(), checkForLiteralCreation(), CheckForReference(), CheckImplicitArgumentConversions(), clang::Sema::CheckLiteralKind(), CheckMapClauseExpressionBase(), CheckMapConflicts(), CheckMoveOnConstruction(), clang::Sema::CheckSubscriptingKind(), CheckTautologicalComparison(), checkUnsafeAssignLiteral(), ClassifyConditional(), collectConjunctionTerms(), clang::Sema::ConversionToObjCStringLiteralCheck(), DiagnoseCallingConvCast(), DiagnoseFloatingImpCast(), DiagnoseOutOfRangeComparison(), DiagnoseSelfAssignment(), clang::Sema::DiagnoseSelfMove(), clang::CodeGen::emitDeclareSimdFunction(), emitInitWithReductionInitializer(), emitOMPArraySectionBase(), clang::CodeGen::emitTaskCall(), clang::Sema::findFailedBooleanCondition(), FindTypeTagExpr(), clang::OMPArraySectionExpr::getBaseOriginalType(), getPrivateItem(), getReferencedDeclOfCallee(), getSizeOfArgType(), getSizeOfExprArg(), hasRecursiveCallInPath(), isCallToSelfClass(), isEnumConstant(), IsEnumConstOrFromMacro(), IsImplicitBoolFloatConversion(), isNonBooleanUnsignedValue(), isSameWidthConstantConversion(), IsStdFunction(), IsTailPaddedMemberArray(), IsTypeLimit(), lookThroughRangesV3Condition(), LookupMemberExpr(), recordFixedType(), clang::edit::rewriteObjCRedundantCallWithLiteral(), rewriteToNumberLiteral(), SemaBuiltinCpuIs(), and SemaBuiltinCpuSupports().

◆ IgnoreParenImpCasts() [2/2]

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

Definition at line 767 of file Expr.h.

◆ IgnoreParenLValueCasts() [1/2]

Expr * Expr::IgnoreParenLValueCasts ( )

Ignore parentheses and lvalue casts.

IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue casts.

Strip off any ParenExpr and CastExprs that represent lvalue casts, returning their operand.

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 2510 of file Expr.cpp.

Referenced by getIncrementedVar(), and clang::Sema::isSelfExpr().

◆ IgnoreParenLValueCasts() [2/2]

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

Definition at line 775 of file Expr.h.

◆ IgnoreParenNoopCasts() [1/2]

Expr * Expr::IgnoreParenNoopCasts ( ASTContext Ctx)

IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the value (including ptr->int casts of the same size).

Strip off any ParenExpr or CastExprs, returning their operand.

Definition at line 2583 of file Expr.cpp.

Referenced by AddVariableConstraints().

◆ IgnoreParenNoopCasts() [2/2]

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

Definition at line 821 of file Expr.h.

◆ IgnoreParens() [1/2]

Expr * Expr::IgnoreParens ( )

IgnoreParens - Ignore parentheses.

If this Expr is a ParenExpr, return its subexpression. If that subexpression is also a ParenExpr, then this method recursively returns its subexpression, and so forth. Otherwise, the method returns the current Expr.

Definition at line 2432 of file Expr.cpp.

Referenced by CheckForDanglingReferenceOrPointer(), clang::Sema::CheckLiteralKind(), CheckMoveOnConstruction(), clang::Sema::checkPseudoObjectRValue(), clang::Sema::checkUnknownAnyArg(), clang::Sema::checkUnsafeExprAssigns(), clang::ento::ExprEngine::CreateCXXTemporaryObject(), clang::Sema::diagnoseARCUnbridgedCast(), clang::Sema::DiscardMisalignedMemberAddress(), doRewriteToUTF8StringBoxedExpressionHelper(), clang::CodeGen::CodeGenFunction::EmitBranchOnBoolExpr(), clang::CodeGen::CodeGenFunction::EmitCXXMemberCallExpr(), EmitLValueOrThrowExpression(), EvalAddr(), evaluateLValueAsAllocSize(), EvalVal(), findBoundMemberType(), findPeephole(), findRetainCycleOwner(), GetAlignOfExpr(), getArrayIndexingBound(), clang::OMPArraySectionExpr::getBaseOriginalType(), clang::CallExpr::getCallReturnType(), clang::Sema::getCopyElisionCandidate(), GetExprRange(), clang::CXXMemberCallExpr::getImplicitObjectArgument(), clang::CXXMemberCallExpr::getMethodDecl(), GetNumNonZeroBytesInInit(), getPrivateItem(), getRightmostLeaf(), HandleConstructorCall(), ignorePointerCastsAndParens(), isBlockVarRef(), isCheapEnoughToEvaluateUnconditionally(), isInvalidICRSource(), isParenthesizedADLCallee(), isSimpleZero(), IsSpecialDiscardedValue(), IsStandardConversion(), clang::InitListExpr::isStringLiteralInit(), clang::Sema::IsStringLiteralToNonConstPointerConversion(), isUnusedResultAWarning(), LookupMethodInReceiverType(), shouldEmitSeparateBlockRetain(), shouldExtendReceiverForInnerPointerMessage(), clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue(), tryEmitARCCopyWeakInit(), tryEmitARCRetainLoadOfScalar(), clang::ento::ExprEngine::VisitBinaryOperator(), clang::ento::ExprEngine::VisitGuardedExpr(), clang::ento::ExprEngine::VisitIncrementDecrementOperator(), clang::ento::ExprEngine::VisitLvalArraySubscriptExpr(), and clang::ento::ConditionBRVisitor::VisitTerminator().

◆ IgnoreParens() [2/2]

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

Definition at line 810 of file Expr.h.

◆ isBoundMemberFunction()

bool Expr::isBoundMemberFunction ( ASTContext Ctx) const

Returns true if this expression is a bound member function.

Definition at line 2402 of file Expr.cpp.

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

◆ isConstantInitializer()

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

◆ isCXX11ConstantExpr()

bool Expr::isCXX11ConstantExpr ( const ASTContext Ctx,
APValue Result = nullptr,
SourceLocation Loc = 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 10693 of file ExprConstant.cpp.

References clang::ASTContext::getLangOpts().

Referenced by EvaluateCPlusPlus11IntegralConstantExpr(), and clang::StandardConversionSequence::getNarrowingKind().

◆ 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 10689 of file ExprConstant.cpp.

References CheckICE().

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 2618 of file Expr.cpp.

◆ isEvaluatable()

bool Expr::isEvaluatable ( const ASTContext Ctx,
SideEffectsKind  SEK = 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 10169 of file ExprConstant.cpp.

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

Referenced by EvaluateBuiltinConstantP(), isCheapEnoughToEvaluateUnconditionally(), and isConstantInitializer().

◆ isGLValue()

bool clang::Expr::isGLValue ( ) const
inline

◆ isImplicitCXXThis()

bool Expr::isImplicitCXXThis ( ) const

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

Definition at line 2699 of file Expr.cpp.

◆ 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.

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());
}

Definition at line 191 of file Expr.h.

Referenced by clang::Sema::ActOnOpenMPAtomicDirective(), clang::Sema::ActOnOpenMPCriticalDirective(), clang::Sema::ActOnOpenMPDistScheduleClause(), clang::Sema::ActOnOpenMPFinalClause(), clang::Sema::ActOnOpenMPIfClause(), clang::Sema::ActOnOpenMPLinearClause(), clang::Sema::ActOnOpenMPScheduleClause(), clang::AtomicExpr::AtomicExpr(), clang::CallExpr::CallExpr(), CheckIfAnyEnclosingLambdasMustCaptureAnyPotentialCaptures(), clang::Sema::CorrectDelayedTyposInExpr(), clang::CXXConstructExpr::CXXConstructExpr(), clang::CXXNewExpr::CXXNewExpr(), clang::ASTContext::getDecltypeType(), clang::ASTContext::getDependentAddressSpaceType(), clang::DesignatedInitExpr::Designator::getFieldName(), clang::ObjCPropertyRefExpr::getReceiverType(), hasOnlyNonStaticMemberFunctions(), HasSideEffects(), clang::TemplateArgument::isInstantiationDependent(), clang::LambdaExpr::isMutable(), IsNonNegativeIntegerValue(), clang::DecltypeType::isSugared(), clang::ParenListExpr::ParenListExpr(), clang::InitListExpr::setInit(), clang::ShuffleVectorExpr::ShuffleVectorExpr(), and clang::ASTNodeImporter::VisitInitListExpr().

◆ isIntegerConstantExpr() [1/2]

bool Expr::isIntegerConstantExpr ( llvm::APSInt &  Result,
const ASTContext Ctx,
SourceLocation Loc = nullptr,
bool  isEvaluated = true 
) const

◆ isIntegerConstantExpr() [2/2]

bool Expr::isIntegerConstantExpr ( const ASTContext Ctx,
SourceLocation Loc = nullptr 
) const

◆ isKnownToHaveBooleanValue()

bool Expr::isKnownToHaveBooleanValue ( ) 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.

Definition at line 135 of file Expr.cpp.

Referenced by clang::Sema::ActOnFinishSwitchStmt(), diagnoseLogicalNotOnLHSofCheck(), DiagnoseOutOfRangeComparison(), and isNonBooleanIntegerValue().

◆ 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. This is an unfortunate abuse of terminology on the part of the C++ committee. In Clang, when we say "r-value", we generally mean a pr-value.

Definition at line 249 of file Expr.h.

References clang::VK_LValue.

Referenced by clang::Sema::ActOnOpenMPAtomicDirective(), AdjustFunctionParmAndArgTypesForDeduction(), clang::Sema::CreateBuiltinArraySubscriptExpr(), EmitOMPAtomicCaptureExpr(), EmitOMPAtomicReadExpr(), EmitOMPAtomicUpdateExpr(), EvaluateExpressionTrait(), clang::ento::ExplodedGraph::isInterestingLValueExpr(), TryClassUnification(), TryLValueToRValueCast(), and TryStaticReferenceDowncast().

◆ 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 669 of file ExprClassification.cpp.

References clang::Expr::Classification::CL_AddressableVoid, clang::Expr::Classification::CL_ArrayTemporary, clang::Expr::Classification::CL_ClassTemporary, clang::Expr::Classification::CL_DuplicateVectorComponents, clang::Expr::Classification::CL_Function, clang::Expr::Classification::CL_LValue, clang::Expr::Classification::CL_MemberFunction, clang::Expr::Classification::CL_ObjCMessageRValue, clang::Expr::Classification::CL_PRValue, clang::Expr::Classification::CL_SubObjCPropertySetting, clang::Expr::Classification::CL_Void, clang::Expr::Classification::CL_XValue, ClassifyModifiable(), clang::Expr::Classification::CM_ArrayType, clang::Expr::Classification::CM_ConstAddrSpace, clang::Expr::Classification::CM_ConstQualified, clang::Expr::Classification::CM_ConstQualifiedField, clang::Expr::Classification::CM_Function, clang::Expr::Classification::CM_IncompleteType, clang::Expr::Classification::CM_LValueCast, clang::Expr::Classification::CM_Modifiable, clang::Expr::Classification::CM_NoSetterProperty, clang::Expr::Classification::CM_RValue, clang::Expr::Classification::CM_Untested, clang::Expr::Classification::getKind(), clang::Expr::Classification::getModifiable(), MLV_ArrayTemporary, MLV_ArrayType, MLV_ClassTemporary, MLV_ConstAddrSpace, MLV_ConstQualified, MLV_ConstQualifiedField, MLV_DuplicateVectorComponents, MLV_IncompleteType, MLV_IncompleteVoidType, MLV_InvalidExpression, MLV_InvalidMessageExpression, MLV_LValueCast, MLV_MemberFunction, MLV_NoSetterProperty, MLV_NotObjectType, MLV_SubObjCPropertySetting, and MLV_Valid.

◆ 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 3273 of file Expr.cpp.

References clang::Default, EvaluateKnownConstInt(), clang::QualType::getAddressSpace(), clang::Type::getAs(), clang::ASTContext::getLangOpts(), clang::Type::getPointeeType(), getType(), clang::APIntStorage::getValue(), isCXX98IntegralConstantExpr(), clang::Type::isEnumeralType(), isIntegerConstantExpr(), isNullPointerConstant(), isTypeDependent(), isValueDependent(), clang::Type::isVoidType(), NPC_NeverValueDependent, NPC_ValueDependentIsNotNull, NPC_ValueDependentIsNull, NPCK_CXX11_nullptr, NPCK_GNUNull, NPCK_NotNull, NPCK_ZeroExpression, NPCK_ZeroLiteral, clang::opencl_generic, and clang::opencl_private.

Referenced by clang::Sema::CheckAdditionOperands(), clang::Sema::CheckCompareOperands(), checkFormatStringExpr(), clang::Sema::CheckMemberPointerConversion(), clang::Sema::CheckPointerConversion(), clang::Sema::DiagnoseConditionalForNull(), DiagnoseNullConversion(), diagnoseObjCLiteralComparison(), clang::Sema::FindCompositePointerType(), getAsPointeeSymbol(), isInvalidICRSource(), clang::Sema::IsMemberPointerConversion(), clang::BinaryOperator::isNullPointerArithmeticExtension(), isNullPointerConstant(), and SemaOpenCLBuiltinEnqueueKernel().

◆ 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 2363 of file Expr.cpp.

◆ isObjCSelfExpr()

bool Expr::isObjCSelfExpr ( ) const

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

Definition at line 3412 of file Expr.cpp.

◆ isOrdinaryOrBitFieldObject()

bool clang::Expr::isOrdinaryOrBitFieldObject ( ) const
inline

Definition at line 416 of file Expr.h.

References clang::OK_BitField, and clang::OK_Ordinary.

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

◆ 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 10757 of file ExprConstant.cpp.

References clang::DeclContext::isDependentContext().

◆ isPotentialConstantExprUnevaluated()

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

isPotentialConstantExprUnevaluted - 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 10798 of file ExprConstant.cpp.

◆ isRValue()

bool clang::Expr::isRValue ( ) const
inline

◆ isTemporaryObject()

bool Expr::isTemporaryObject ( ASTContext C,
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 2657 of file Expr.cpp.

References getType(), clang::ASTContext::getTypeDeclType(), and clang::ASTContext::hasSameUnqualifiedType().

◆ isTypeDependent()

bool clang::Expr::isTypeDependent ( ) const
inline

isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next.

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 167 of file Expr.h.

Referenced by clang::Sema::ActOnChooseExpr(), clang::Sema::ActOnConditionalOp(), clang::Sema::ActOnDesignatedInitializer(), clang::Sema::ActOnFinishCXXInClassMemberInitializer(), clang::Sema::ActOnFinishSwitchStmt(), clang::Sema::ActOnIndirectGotoStmt(), clang::Sema::ActOnOpenMPCriticalDirective(), clang::Sema::ActOnOpenMPDistScheduleClause(), clang::Sema::ActOnOpenMPFinalClause(), clang::Sema::ActOnOpenMPIfClause(), clang::Sema::ActOnOpenMPLinearClause(), clang::Sema::ActOnOpenMPScheduleClause(), AnalyzeBitFieldAssignment(), AnalyzeImplicitConversions(), clang::AtomicExpr::AtomicExpr(), clang::Sema::BuildBaseInitializer(), clang::Sema::BuildBinOp(), clang::Sema::BuildCXXThrow(), clang::Sema::BuildExpressionTrait(), clang::Sema::BuildExtVectorType(), clang::Sema::BuildMemberInitializer(), clang::Sema::BuildObjCBoxedExpr(), clang::Sema::BuildObjCBridgedCast(), clang::Sema::BuildObjCSubscriptExpression(), clang::Sema::BuildStaticAssertDeclaration(), clang::CallExpr::CallExpr(), clang::canDynamicCastThrow(), clang::canTypeidThrow(), CheckArrow(), clang::Sema::CheckCaseExpression(), clang::Sema::checkExceptionSpecification(), checkFormatStringExpr(), CheckImplicitConversion(), CheckIncrementDecrementOperand(), CheckIndirectionOperand(), CheckObjCCollectionLiteralElement(), clang::Sema::CheckObjCForCollectionOperand(), clang::Sema::checkPseudoObjectAssignment(), clang::Sema::checkPseudoObjectIncDec(), clang::Sema::CheckTemplateArgument(), CheckTemplateArgumentPointerToMember(), clang::Sema::CodeCompleteCall(), clang::CoroutineSuspendExpr::CoroutineSuspendExpr(), clang::Sema::CorrectDelayedTyposInExpr(), clang::OffsetOfExpr::CreateEmpty(), DecodeOperatorCall(), clang::Sema::DeduceAutoType(), clang::Sema::DiagnoseEqualityWithExtraParens(), doRewriteToUTF8StringBoxedExpressionHelper(), EvalAddr(), clang::ASTContext::getDependentSizedArrayType(), clang::DesignatedInitExpr::Designator::getFieldName(), getPrivateItem(), clang::ObjCPropertyRefExpr::getReceiverType(), clang::ASTContext::getTypeOfExprType(), clang::ArrayTypeTraitExpr::getValue(), HandleNeonVectorTypeAttr(), HandleVectorSizeAttr(), hasOnlyNonStaticMemberFunctions(), isBoundMemberFunction(), clang::LambdaExpr::isMutable(), IsNonNegativeIntegerValue(), isNullPointerConstant(), isNullPointerValueTemplateArgument(), clang::TypeOfExprType::isSugared(), isUnusedResultAWarning(), ObjCEnumerationCollection(), clang::ParenListExpr::ParenListExpr(), clang::Sema::PerformContextualImplicitConversion(), clang::TreeTransform< Derived >::RebuildCXXForRangeStmt(), clang::TreeTransform< Derived >::RebuildCXXPseudoDestructorExpr(), rewriteToNumericBoxedExpression(), SemaBuiltinCpuIs(), clang::Sema::SemaBuiltinShuffleVector(), clang::InitListExpr::setInit(), clang::ShuffleVectorExpr::ShuffleVectorExpr(), and clang::Sema::VerifyBitField().

◆ 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 2028 of file Expr.cpp.

References clang::CompoundStmt::body_empty(), clang::CallExpr::getArg(), clang::Type::getAsCXXRecordDecl(), clang::CallExpr::getCallee(), clang::CallExpr::getCalleeDecl(), clang::CallExpr::getCallReturnType(), clang::ASTContext::getCanonicalType(), getExprLoc(), clang::ASTContext::getLangOpts(), clang::BinaryOperator::getLHS(), clang::ConditionalOperator::getLHS(), clang::Stmt::getLocEnd(), clang::Stmt::getLocStart(), clang::InitListExpr::getLocStart(), clang::ObjCMessageExpr::getMethodDecl(), clang::ObjCMessageExpr::getMethodFamily(), clang::CallExpr::getNumArgs(), clang::UnaryOperator::getOpcode(), clang::BinaryOperator::getOpcode(), clang::CXXOperatorCallExpr::getOperator(), clang::CXXOperatorCallExpr::getOperatorLoc(), clang::UnaryOperator::getOperatorLoc(), clang::BinaryOperator::getOperatorLoc(), clang::BinaryOperator::getRHS(), clang::ConditionalOperator::getRHS(), clang::CXXOperatorCallExpr::getSourceRange(), clang::Stmt::getSourceRange(), clang::Stmt::getStmtClass(), clang::UnaryOperator::getSubExpr(), clang::PseudoObjectExpr::getSyntacticForm(), getType(), clang::FunctionDecl::hasUnusedResultAttr(), IgnoreParens(), clang::BinaryOperator::isAssignmentOp(), clang::ObjCMessageExpr::isInstanceMessage(), clang::Type::isReferenceType(), isTypeDependent(), isUnusedResultAWarning(), clang::Type::isVoidType(), and clang::OMF_init.

Referenced by isUnusedResultAWarning().

◆ isValueDependent()

bool clang::Expr::isValueDependent ( ) const
inline

isValueDependent - Determines whether this expression is value-dependent (C++ [temp.dep.constexpr]).

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 149 of file Expr.h.

Referenced by clang::Sema::ActOnChooseExpr(), clang::Sema::ActOnDesignatedInitializer(), clang::Sema::ActOnFinishSwitchStmt(), clang::Sema::ActOnOpenMPCriticalDirective(), clang::Sema::ActOnOpenMPDistScheduleClause(), clang::Sema::ActOnOpenMPFinalClause(), clang::Sema::ActOnOpenMPIfClause(), clang::Sema::ActOnOpenMPLinearClause(), clang::Sema::ActOnOpenMPScheduleClause(), AnalyzeBitFieldAssignment(), AnalyzeComparison(), AnalyzeImplicitConversions(), clang::AtomicExpr::AtomicExpr(), clang::Sema::BuildAddressSpaceAttr(), clang::Sema::BuildExtVectorType(), clang::Sema::BuildStaticAssertDeclaration(), clang::CallExpr::CallExpr(), clang::Sema::CheckCaseExpression(), clang::Sema::CheckCXXBooleanCondition(), checkFormatStringExpr(), CheckICE(), CheckImplicitConversion(), CheckNonNullExpr(), CheckTemplateArgumentAddressOfObjectOrFunction(), CheckTemplateArgumentPointerToMember(), clang::Sema::CorrectDelayedTyposInExpr(), clang::CXXConstructExpr::CXXConstructExpr(), clang::ASTContext::DeclMustBeEmitted(), clang::Sema::DiagnoseSentinelCalls(), EvaluateInPlace(), EvaluateVarDecl(), evaluateVarDeclInit(), clang::ASTContext::getDependentSizedArrayType(), clang::DesignatedInitExpr::Designator::getFieldName(), clang::StandardConversionSequence::getNarrowingKind(), clang::FunctionProtoType::getNoexceptSpec(), clang::SizeOfPackExpr::getPackLength(), getPrivateItem(), clang::TypeTraitExpr::getValue(), HandleNeonVectorTypeAttr(), HandleVectorSizeAttr(), isCanonicalExceptionSpecification(), clang::LambdaExpr::isMutable(), IsNonNegativeIntegerValue(), isNullPointerConstant(), isNullPointerValueTemplateArgument(), clang::SizeOfPackExpr::isPartiallySubstituted(), IsTailPaddedMemberArray(), mergeExceptionSpecs(), clang::ParenListExpr::ParenListExpr(), SemaBuiltinCpuIs(), clang::InitListExpr::setInit(), clang::ShuffleVectorExpr::ShuffleVectorExpr(), VariableCanNeverBeAConstantExpression(), clang::Sema::VerifyBitField(), and clang::ASTNodeImporter::VisitInitListExpr().

◆ isXValue()

bool clang::Expr::isXValue ( ) const
inline

Definition at line 251 of file Expr.h.

References clang::VK_XValue.

Referenced by TryClassUnification(), and tryEmitARCRetainLoadOfScalar().

◆ 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 437 of file Expr.h.

References clang::OK_BitField.

Referenced by TryReferenceInitializationCore().

◆ refersToGlobalRegisterVar()

bool Expr::refersToGlobalRegisterVar ( ) const

Returns whether this expression refers to a global register variable.

Definition at line 3502 of file Expr.cpp.

◆ refersToVectorElement()

bool Expr::refersToVectorElement ( ) const

Returns whether this expression refers to a vector element.

Definition at line 3476 of file Expr.cpp.

Referenced by TryReferenceInitializationCore().

◆ setContainsUnexpandedParameterPack()

void clang::Expr::setContainsUnexpandedParameterPack ( bool  PP = true)
inline

Set the bit that describes whether this expression contains an unexpanded parameter pack.

Definition at line 220 of file Expr.h.

◆ setInstantiationDependent()

void clang::Expr::setInstantiationDependent ( bool  ID)
inline

Set whether this expression is instantiation-dependent or not.

Definition at line 196 of file Expr.h.

Referenced by clang::ASTNodeImporter::VisitInitListExpr().

◆ setObjectKind()

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

setObjectKind - Set the object kind produced by this expression.

Definition at line 425 of file Expr.h.

◆ setType()

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

◆ setTypeDependent()

void clang::Expr::setTypeDependent ( bool  TD)
inline

Set whether this expression is type-dependent or not.

Definition at line 170 of file Expr.h.

◆ setValueDependent()

void clang::Expr::setValueDependent ( bool  VD)
inline

Set whether this expression is value-dependent or not.

Definition at line 152 of file Expr.h.

Referenced by clang::ASTNodeImporter::VisitInitListExpr().

◆ setValueKind()

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

setValueKind - Set the value kind produced by this expression.

Definition at line 422 of file Expr.h.

◆ skipRValueSubobjectAdjustments() [1/2]

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 77 of file Expr.cpp.

Referenced by clang::ento::ExprEngine::getInitialState(), performLifetimeExtension(), and performReferenceExtension().

◆ skipRValueSubobjectAdjustments() [2/2]

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

Definition at line 847 of file Expr.h.

◆ 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 10822 of file ExprConstant.cpp.


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