clang  3.7.0
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clang::GenericSelectionExpr Class Reference

Represents a C11 generic selection. More...

#include <Expr.h>

Inheritance diagram for clang::GenericSelectionExpr:
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Collaboration diagram for clang::GenericSelectionExpr:
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Public Member Functions

 GenericSelectionExpr (const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr, ArrayRef< TypeSourceInfo * > AssocTypes, ArrayRef< Expr * > AssocExprs, SourceLocation DefaultLoc, SourceLocation RParenLoc, bool ContainsUnexpandedParameterPack, unsigned ResultIndex)
 
 GenericSelectionExpr (const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr, ArrayRef< TypeSourceInfo * > AssocTypes, ArrayRef< Expr * > AssocExprs, SourceLocation DefaultLoc, SourceLocation RParenLoc, bool ContainsUnexpandedParameterPack)
 This constructor is used in the result-dependent case. More...
 
 GenericSelectionExpr (EmptyShell Empty)
 
unsigned getNumAssocs () const
 
SourceLocation getGenericLoc () const
 
SourceLocation getDefaultLoc () const
 
SourceLocation getRParenLoc () const
 
const ExprgetAssocExpr (unsigned i) const
 
ExprgetAssocExpr (unsigned i)
 
const TypeSourceInfogetAssocTypeSourceInfo (unsigned i) const
 
TypeSourceInfogetAssocTypeSourceInfo (unsigned i)
 
QualType getAssocType (unsigned i) const
 
const ExprgetControllingExpr () const
 
ExprgetControllingExpr ()
 
bool isResultDependent () const
 Whether this generic selection is result-dependent. More...
 
unsigned getResultIndex () const
 
const ExprgetResultExpr () const
 
ExprgetResultExpr ()
 
SourceLocation getLocStart () const LLVM_READONLY
 
SourceLocation getLocEnd () const LLVM_READONLY
 
child_range children ()
 
- Public Member Functions inherited from clang::Expr
QualType getType () const
 
void setType (QualType t)
 
bool isValueDependent () const
 
void setValueDependent (bool VD)
 Set whether this expression is value-dependent or not. More...
 
bool isTypeDependent () const
 
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
 
bool isUnusedResultAWarning (const Expr *&WarnExpr, SourceLocation &Loc, SourceRange &R1, SourceRange &R2, ASTContext &Ctx) const
 
bool isLValue () const
 
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
 
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
 
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
 
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 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
 
bool isIntegerConstantExpr (llvm::APSInt &Result, const ASTContext &Ctx, SourceLocation *Loc=nullptr, bool isEvaluated=true) const
 
bool isIntegerConstantExpr (const ASTContext &Ctx, SourceLocation *Loc=nullptr) const
 
bool isCXX98IntegralConstantExpr (const ASTContext &Ctx) const
 
bool isCXX11ConstantExpr (const ASTContext &Ctx, APValue *Result=nullptr, SourceLocation *Loc=nullptr) const
 
bool isConstantInitializer (ASTContext &Ctx, bool ForRef, const Expr **Culprit=nullptr) const
 
bool EvaluateAsRValue (EvalResult &Result, const ASTContext &Ctx) const
 
bool EvaluateAsBooleanCondition (bool &Result, const ASTContext &Ctx) const
 
bool EvaluateAsInt (llvm::APSInt &Result, const ASTContext &Ctx, SideEffectsKind AllowSideEffects=SE_NoSideEffects) const
 
bool isEvaluatable (const ASTContext &Ctx) const
 
bool HasSideEffects (const ASTContext &Ctx, bool IncludePossibleEffects=true) const
 
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
 
void EvaluateForOverflow (const ASTContext &Ctx) const
 
bool EvaluateAsLValue (EvalResult &Result, const ASTContext &Ctx) const
 
bool EvaluateAsInitializer (APValue &Result, const ASTContext &Ctx, const VarDecl *VD, SmallVectorImpl< PartialDiagnosticAt > &Notes) const
 
bool EvaluateWithSubstitution (APValue &Value, ASTContext &Ctx, const FunctionDecl *Callee, ArrayRef< const Expr * > Args) const
 
NullPointerConstantKind isNullPointerConstant (ASTContext &Ctx, NullPointerConstantValueDependence NPC) const
 
bool isOBJCGCCandidate (ASTContext &Ctx) const
 
bool isBoundMemberFunction (ASTContext &Ctx) const
 Returns true if this expression is a bound member function. More...
 
ExprIgnoreImpCasts () LLVM_READONLY
 
ExprIgnoreImplicit () LLVM_READONLY
 
const ExprIgnoreImplicit () const LLVM_READONLY
 
ExprIgnoreParens () LLVM_READONLY
 
ExprIgnoreParenCasts () LLVM_READONLY
 
ExprIgnoreCasts () LLVM_READONLY
 Ignore casts. Strip off any CastExprs, returning their operand. More...
 
ExprIgnoreParenImpCasts () LLVM_READONLY
 
ExprIgnoreConversionOperator () LLVM_READONLY
 
const ExprIgnoreConversionOperator () const LLVM_READONLY
 
const ExprIgnoreParenImpCasts () const LLVM_READONLY
 
ExprIgnoreParenLValueCasts () LLVM_READONLY
 
const ExprIgnoreParenLValueCasts () const LLVM_READONLY
 
ExprIgnoreParenNoopCasts (ASTContext &Ctx) LLVM_READONLY
 
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 ExprskipRValueSubobjectAdjustments (SmallVectorImpl< const Expr * > &CommaLHS, SmallVectorImpl< SubobjectAdjustment > &Adjustments) const
 

Static Public Member Functions

static bool classof (const Stmt *T)
 
- Static Public Member Functions inherited from clang::Expr
static ExprValueKind getValueKindForType (QualType T)
 
static bool isPotentialConstantExpr (const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags)
 
static bool isPotentialConstantExprUnevaluated (Expr *E, const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags)
 
static QualType findBoundMemberType (const Expr *expr)
 Given an expression of bound-member type, find the type of the member. Returns null if this is an overloaded bound member expression. More...
 
static bool hasAnyTypeDependentArguments (ArrayRef< Expr * > Exprs)
 
static bool classof (const Stmt *T)
 

Friends

class ASTStmtReader
 

Additional Inherited Members

- Public Types inherited from clang::Expr
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_ConstAddrSpace, MLV_ArrayType, MLV_NoSetterProperty, MLV_MemberFunction,
  MLV_SubObjCPropertySetting, MLV_InvalidMessageExpression, MLV_ClassTemporary, MLV_ArrayTemporary
}
 
enum  SideEffectsKind { SE_NoSideEffects, 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...
 
- Protected Member Functions inherited from clang::Expr
 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...
 

Detailed Description

Represents a C11 generic selection.

A generic selection (C11 6.5.1.1) contains an unevaluated controlling expression, followed by one or more generic associations. Each generic association specifies a type name and an expression, or "default" and an expression (in which case it is known as a default generic association). The type and value of the generic selection are identical to those of its result expression, which is defined as the expression in the generic association with a type name that is compatible with the type of the controlling expression, or the expression in the default generic association if no types are compatible. For example:

_Generic(X, double: 1, float: 2, default: 3)

The above expression evaluates to 1 if 1.0 is substituted for X, 2 if 1.0f or 3 if "hello".

As an extension, generic selections are allowed in C++, where the following additional semantics apply:

Any generic selection whose controlling expression is type-dependent or which names a dependent type in its association list is result-dependent, which means that the choice of result expression is dependent. Result-dependent generic associations are both type- and value-dependent.

Definition at line 4446 of file Expr.h.

Constructor & Destructor Documentation

GenericSelectionExpr::GenericSelectionExpr ( const ASTContext Context,
SourceLocation  GenericLoc,
Expr ControllingExpr,
ArrayRef< TypeSourceInfo * >  AssocTypes,
ArrayRef< Expr * >  AssocExprs,
SourceLocation  DefaultLoc,
SourceLocation  RParenLoc,
bool  ContainsUnexpandedParameterPack,
unsigned  ResultIndex 
)

Definition at line 3806 of file Expr.cpp.

GenericSelectionExpr::GenericSelectionExpr ( const ASTContext Context,
SourceLocation  GenericLoc,
Expr ControllingExpr,
ArrayRef< TypeSourceInfo * >  AssocTypes,
ArrayRef< Expr * >  AssocExprs,
SourceLocation  DefaultLoc,
SourceLocation  RParenLoc,
bool  ContainsUnexpandedParameterPack 
)

This constructor is used in the result-dependent case.

Definition at line 3832 of file Expr.cpp.

clang::GenericSelectionExpr::GenericSelectionExpr ( EmptyShell  Empty)
inlineexplicit

Definition at line 4470 of file Expr.h.

Member Function Documentation

child_range clang::GenericSelectionExpr::children ( )
inline

Definition at line 4524 of file Expr.h.

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

Definition at line 4520 of file Expr.h.

const Expr* clang::GenericSelectionExpr::getAssocExpr ( unsigned  i) const
inline

Definition at line 4479 of file Expr.h.

Referenced by getResultExpr().

Expr* clang::GenericSelectionExpr::getAssocExpr ( unsigned  i)
inline

Definition at line 4482 of file Expr.h.

QualType clang::GenericSelectionExpr::getAssocType ( unsigned  i) const
inline

Definition at line 4489 of file Expr.h.

References getAssocTypeSourceInfo().

const TypeSourceInfo* clang::GenericSelectionExpr::getAssocTypeSourceInfo ( unsigned  i) const
inline

Definition at line 4484 of file Expr.h.

Referenced by getAssocType().

TypeSourceInfo* clang::GenericSelectionExpr::getAssocTypeSourceInfo ( unsigned  i)
inline

Definition at line 4487 of file Expr.h.

const Expr* clang::GenericSelectionExpr::getControllingExpr ( ) const
inline

Definition at line 4496 of file Expr.h.

Expr* clang::GenericSelectionExpr::getControllingExpr ( )
inline

Definition at line 4499 of file Expr.h.

SourceLocation clang::GenericSelectionExpr::getDefaultLoc ( ) const
inline

Definition at line 4476 of file Expr.h.

SourceLocation clang::GenericSelectionExpr::getGenericLoc ( ) const
inline

Definition at line 4475 of file Expr.h.

SourceLocation clang::GenericSelectionExpr::getLocEnd ( ) const
inline

Definition at line 4518 of file Expr.h.

SourceLocation clang::GenericSelectionExpr::getLocStart ( ) const
inline

Definition at line 4517 of file Expr.h.

unsigned clang::GenericSelectionExpr::getNumAssocs ( ) const
inline

Definition at line 4473 of file Expr.h.

const Expr* clang::GenericSelectionExpr::getResultExpr ( ) const
inline

The generic selection's result expression. Defined only if the generic selection is not result-dependent.

Definition at line 4514 of file Expr.h.

References getAssocExpr(), and getResultIndex().

Referenced by clang::EvaluatedExprVisitorBase< make_ptr, ImplClass >::VisitGenericSelectionExpr().

Expr* clang::GenericSelectionExpr::getResultExpr ( )
inline

Definition at line 4515 of file Expr.h.

References getAssocExpr(), and getResultIndex().

unsigned clang::GenericSelectionExpr::getResultIndex ( ) const
inline

The zero-based index of the result expression's generic association in the generic selection's association list. Defined only if the generic selection is not result-dependent.

Definition at line 4507 of file Expr.h.

References isResultDependent().

Referenced by getResultExpr().

SourceLocation clang::GenericSelectionExpr::getRParenLoc ( ) const
inline

Definition at line 4477 of file Expr.h.

bool clang::GenericSelectionExpr::isResultDependent ( ) const
inline

Whether this generic selection is result-dependent.

Definition at line 4502 of file Expr.h.

Referenced by getResultIndex(), and clang::EvaluatedExprVisitorBase< make_ptr, ImplClass >::VisitGenericSelectionExpr().

Friends And Related Function Documentation

friend class ASTStmtReader
friend

Definition at line 4528 of file Expr.h.


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