clang::IfStmt Class Reference

IfStmt - This represents an if/then/else. More...

#include "clang/AST/Stmt.h"

Inheritance diagram for clang::IfStmt:

Public Member Functions
bool	hasInitStorage () const
	True if this IfStmt has the storage for an init statement.
bool	hasVarStorage () const
	True if this IfStmt has storage for a variable declaration.
bool	hasElseStorage () const
	True if this IfStmt has storage for an else statement.
Expr *	getCond ()
const Expr *	getCond () const
void	setCond (Expr *Cond)
Stmt *	getThen ()
const Stmt *	getThen () const
void	setThen (Stmt *Then)
Stmt *	getElse ()
const Stmt *	getElse () const
void	setElse (Stmt *Else)
VarDecl *	getConditionVariable ()
	Retrieve the variable declared in this "if" statement, if any.
const VarDecl *	getConditionVariable () const
void	setConditionVariable (const ASTContext &Ctx, VarDecl *V)
	Set the condition variable for this if statement.
DeclStmt *	getConditionVariableDeclStmt ()
	If this IfStmt has a condition variable, return the faux DeclStmt associated with the creation of that condition variable.
const DeclStmt *	getConditionVariableDeclStmt () const
void	setConditionVariableDeclStmt (DeclStmt *CondVar)
Stmt *	getInit ()
const Stmt *	getInit () const
void	setInit (Stmt *Init)
SourceLocation	getIfLoc () const
void	setIfLoc (SourceLocation IfLoc)
SourceLocation	getElseLoc () const
void	setElseLoc (SourceLocation ElseLoc)
bool	isConsteval () const
bool	isNonNegatedConsteval () const
bool	isNegatedConsteval () const
bool	isConstexpr () const
void	setStatementKind (IfStatementKind Kind)
IfStatementKind	getStatementKind () const
std::optional< const Stmt * >	getNondiscardedCase (const ASTContext &Ctx) const
	If this is an 'if constexpr', determine which substatement will be taken.
std::optional< Stmt * >	getNondiscardedCase (const ASTContext &Ctx)
bool	isObjCAvailabilityCheck () const
SourceLocation	getBeginLoc () const
SourceLocation	getEndLoc () const LLVM_READONLY
SourceLocation	getLParenLoc () const
void	setLParenLoc (SourceLocation Loc)
SourceLocation	getRParenLoc () const
void	setRParenLoc (SourceLocation Loc)
child_range	children ()
const_child_range	children () 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 ()=delete
	Stmt (const Stmt &)=delete
	Stmt (Stmt &&)=delete
Stmt &	operator= (const Stmt &)=delete
Stmt &	operator= (Stmt &&)=delete
	Stmt (StmtClass SC)
StmtClass	getStmtClass () const
const char *	getStmtClassName () const
SourceRange	getSourceRange () const LLVM_READONLY
	SourceLocation tokens are not useful in isolation - they are low level value objects created/interpreted by SourceManager.
SourceLocation	getBeginLoc () const LLVM_READONLY
SourceLocation	getEndLoc () const LLVM_READONLY
void	dump () const
	Dumps the specified AST fragment and all subtrees to llvm::errs().
void	dump (raw_ostream &OS, const ASTContext &Context) const
int64_t	getID (const ASTContext &Context) const
void	dumpColor () const
	dumpColor - same as dump(), but forces color highlighting.
void	dumpPretty (const ASTContext &Context) const
	dumpPretty/printPretty - These two methods do a "pretty print" of the AST back to its original source language syntax.
void	printPretty (raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\n", const ASTContext *Context=nullptr) const
void	printPrettyControlled (raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\n", const ASTContext *Context=nullptr) const
void	printJson (raw_ostream &Out, PrinterHelper *Helper, const PrintingPolicy &Policy, bool AddQuotes) const
	Pretty-prints in JSON format.
void	viewAST () const
	viewAST - Visualize an AST rooted at this Stmt* using GraphViz.
Stmt *	IgnoreContainers (bool IgnoreCaptured=false)
	Skip no-op (attributed, compound) container stmts and skip captured stmt at the top, if IgnoreCaptured is true.
const Stmt *	IgnoreContainers (bool IgnoreCaptured=false) const
const Stmt *	stripLabelLikeStatements () const
	Strip off all label-like statements.
Stmt *	stripLabelLikeStatements ()
child_range	children ()
const_child_range	children () const
child_iterator	child_begin ()
child_iterator	child_end ()
const_child_iterator	child_begin () const
const_child_iterator	child_end () const
void	Profile (llvm::FoldingSetNodeID &ID, const ASTContext &Context, bool Canonical) const
	Produce a unique representation of the given statement.
void	ProcessODRHash (llvm::FoldingSetNodeID &ID, ODRHash &Hash) const
	Calculate a unique representation for a statement that is stable across compiler invocations.

Static Public Member Functions
static IfStmt *	Create (const ASTContext &Ctx, SourceLocation IL, IfStatementKind Kind, Stmt *Init, VarDecl *Var, Expr *Cond, SourceLocation LPL, SourceLocation RPL, Stmt *Then, SourceLocation EL=SourceLocation(), Stmt *Else=nullptr)
	Create an IfStmt.
static IfStmt *	CreateEmpty (const ASTContext &Ctx, bool HasElse, bool HasVar, bool HasInit)
	Create an empty IfStmt optionally with storage for an else statement, condition variable and init expression.
static bool	classof (const Stmt *T)
Static Public Member Functions inherited from clang::Stmt
static void	addStmtClass (const StmtClass s)
static void	EnableStatistics ()
static void	PrintStats ()
static Likelihood	getLikelihood (ArrayRef< const Attr * > Attrs)
static Likelihood	getLikelihood (const Stmt *S)
static const Attr *	getLikelihoodAttr (const Stmt *S)
static Likelihood	getLikelihood (const Stmt *Then, const Stmt *Else)
static std::tuple< bool, const Attr *, const Attr * >	determineLikelihoodConflict (const Stmt *Then, const Stmt *Else)

Additional Inherited Members
Public Types inherited from clang::Stmt
enum	StmtClass { NoStmtClass = 0 }
enum	Likelihood { LH_Unlikely = -1 , LH_None , LH_Likely }
	The likelihood of a branch being taken. More...
using	child_iterator = StmtIterator
	Child Iterators: All subclasses must implement 'children' to permit easy iteration over the substatements/subexpressions of an AST node.
using	const_child_iterator = ConstStmtIterator
using	child_range = llvm::iterator_range< child_iterator >
using	const_child_range = llvm::iterator_range< const_child_iterator >
Protected Types inherited from clang::Stmt
enum	{ NumStmtBits = 8 }
enum	{ NumExprBits = NumStmtBits + 5 + llvm::BitWidth<ExprDependence> }
enum	{ NumCallExprBits = 32 }
enum	{ NumOverloadExprBits = NumExprBits + 1 }
template<typename T >
using	ConstCastIterator = CastIterator< T, const T *const, const Stmt *const >
	Const iterator for iterating over Stmt * arrays that contain only T *.
using	ExprIterator = CastIterator< Expr >
using	ConstExprIterator = ConstCastIterator< Expr >
Protected 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.
Protected Attributes inherited from clang::Stmt
union {
StmtBitfields   StmtBits
NullStmtBitfields   NullStmtBits
CompoundStmtBitfields   CompoundStmtBits
LabelStmtBitfields   LabelStmtBits
AttributedStmtBitfields   AttributedStmtBits
IfStmtBitfields   IfStmtBits
SwitchStmtBitfields   SwitchStmtBits
WhileStmtBitfields   WhileStmtBits
DoStmtBitfields   DoStmtBits
ForStmtBitfields   ForStmtBits
GotoStmtBitfields   GotoStmtBits
ContinueStmtBitfields   ContinueStmtBits
BreakStmtBitfields   BreakStmtBits
ReturnStmtBitfields   ReturnStmtBits
SwitchCaseBitfields   SwitchCaseBits
ExprBitfields   ExprBits
ConstantExprBitfields   ConstantExprBits
PredefinedExprBitfields   PredefinedExprBits
DeclRefExprBitfields   DeclRefExprBits
FloatingLiteralBitfields   FloatingLiteralBits
StringLiteralBitfields   StringLiteralBits
CharacterLiteralBitfields   CharacterLiteralBits
UnaryOperatorBitfields   UnaryOperatorBits
UnaryExprOrTypeTraitExprBitfields   UnaryExprOrTypeTraitExprBits
ArrayOrMatrixSubscriptExprBitfields   ArrayOrMatrixSubscriptExprBits
CallExprBitfields   CallExprBits
MemberExprBitfields   MemberExprBits
CastExprBitfields   CastExprBits
BinaryOperatorBitfields   BinaryOperatorBits
InitListExprBitfields   InitListExprBits
ParenListExprBitfields   ParenListExprBits
GenericSelectionExprBitfields   GenericSelectionExprBits
PseudoObjectExprBitfields   PseudoObjectExprBits
SourceLocExprBitfields   SourceLocExprBits
StmtExprBitfields   StmtExprBits
CXXOperatorCallExprBitfields   CXXOperatorCallExprBits
CXXRewrittenBinaryOperatorBitfields   CXXRewrittenBinaryOperatorBits
CXXBoolLiteralExprBitfields   CXXBoolLiteralExprBits
CXXNullPtrLiteralExprBitfields   CXXNullPtrLiteralExprBits
CXXThisExprBitfields   CXXThisExprBits
CXXThrowExprBitfields   CXXThrowExprBits
CXXDefaultArgExprBitfields   CXXDefaultArgExprBits
CXXDefaultInitExprBitfields   CXXDefaultInitExprBits
CXXScalarValueInitExprBitfields   CXXScalarValueInitExprBits
CXXNewExprBitfields   CXXNewExprBits
CXXDeleteExprBitfields   CXXDeleteExprBits
TypeTraitExprBitfields   TypeTraitExprBits
DependentScopeDeclRefExprBitfields   DependentScopeDeclRefExprBits
CXXConstructExprBitfields   CXXConstructExprBits
ExprWithCleanupsBitfields   ExprWithCleanupsBits
CXXUnresolvedConstructExprBitfields   CXXUnresolvedConstructExprBits
CXXDependentScopeMemberExprBitfields   CXXDependentScopeMemberExprBits
OverloadExprBitfields   OverloadExprBits
UnresolvedLookupExprBitfields   UnresolvedLookupExprBits
UnresolvedMemberExprBitfields   UnresolvedMemberExprBits
CXXNoexceptExprBitfields   CXXNoexceptExprBits
SubstNonTypeTemplateParmExprBitfields   SubstNonTypeTemplateParmExprBits
LambdaExprBitfields   LambdaExprBits
RequiresExprBitfields   RequiresExprBits
CoawaitExprBitfields   CoawaitBits
ObjCIndirectCopyRestoreExprBitfields   ObjCIndirectCopyRestoreExprBits
OpaqueValueExprBitfields   OpaqueValueExprBits
};

Detailed Description

IfStmt - This represents an if/then/else.

Definition at line 1952 of file Stmt.h.

Member Function Documentation

children() [1/2]

child_range clang::IfStmt::children ( )

inline

Definition at line 2179 of file Stmt.h.

References isConsteval().

children() [2/2]

const_child_range clang::IfStmt::children ( ) const

inline

Definition at line 2188 of file Stmt.h.

References isConsteval().

classof()

static bool clang::IfStmt::classof ( const Stmt *  T )

inlinestatic

Definition at line 2197 of file Stmt.h.

References clang::Stmt::getStmtClass().

Create()

IfStmt * IfStmt::Create ( const ASTContext &  Ctx, SourceLocation  IL, IfStatementKind  Kind, Stmt *  Init, VarDecl *  Var, Expr *  Cond, SourceLocation  LPL, SourceLocation  RPL, Stmt *  Then, SourceLocation  EL = SourceLocation(), Stmt *  Else = nullptr  )

static

Create an IfStmt.

Definition at line 956 of file Stmt.cpp.

References clang::ASTContext::Allocate().

Referenced by clang::Sema::BuildIfStmt(), create_call_once(), create_dispatch_once(), create_OSAtomicCompareAndSwap(), and clang::ASTNodeImporter::VisitIfStmt().

CreateEmpty()

IfStmt * IfStmt::CreateEmpty ( const ASTContext &  Ctx, bool  HasElse, bool  HasVar, bool  HasInit  )

static

Create an empty IfStmt optionally with storage for an else statement, condition variable and init expression.

Definition at line 971 of file Stmt.cpp.

References clang::ASTContext::Allocate().

getBeginLoc()

SourceLocation clang::IfStmt::getBeginLoc ( ) const

inline

Definition at line 2166 of file Stmt.h.

References getIfLoc().

getCond() [1/2]

Expr * clang::IfStmt::getCond ( )

inline

Definition at line 2031 of file Stmt.h.

Referenced by DiagUninitUse(), EvaluateStmt(), getNondiscardedCase(), isIdenticalStmt(), and isObjCAvailabilityCheck().

getCond() [2/2]

const Expr * clang::IfStmt::getCond ( ) const

inline

Definition at line 2035 of file Stmt.h.

getConditionVariable() [1/2]

VarDecl * IfStmt::getConditionVariable

(

)

Retrieve the variable declared in this "if" statement, if any.

In the following example, "x" is the condition variable.

if (int x = foo()) {
  printf("x is %d", x);
}

Definition at line 980 of file Stmt.cpp.

References getConditionVariableDeclStmt().

Referenced by EvaluateStmt(), and getConditionVariable().

getConditionVariable() [2/2]

const VarDecl * clang::IfStmt::getConditionVariable ( ) const

inline

Definition at line 2077 of file Stmt.h.

References getConditionVariable().

getConditionVariableDeclStmt() [1/2]

DeclStmt * clang::IfStmt::getConditionVariableDeclStmt ( )

inline

If this IfStmt has a condition variable, return the faux DeclStmt associated with the creation of that condition variable.

Definition at line 2087 of file Stmt.h.

References hasVarStorage().

Referenced by getConditionVariable().

getConditionVariableDeclStmt() [2/2]

const DeclStmt * clang::IfStmt::getConditionVariableDeclStmt ( ) const

inline

Definition at line 2093 of file Stmt.h.

References hasVarStorage().

getElse() [1/2]

Stmt * clang::IfStmt::getElse ( )

inline

Definition at line 2052 of file Stmt.h.

References hasElseStorage().

Referenced by CheckConstexprFunctionStmt(), DiagUninitUse(), EvaluateStmt(), getEndLoc(), getNondiscardedCase(), and isIdenticalStmt().

getElse() [2/2]

const Stmt * clang::IfStmt::getElse ( ) const

inline

Definition at line 2057 of file Stmt.h.

References hasElseStorage().

getElseLoc()

SourceLocation clang::IfStmt::getElseLoc ( ) const

inline

Definition at line 2123 of file Stmt.h.

References hasElseStorage().

getEndLoc()

SourceLocation clang::IfStmt::getEndLoc ( ) const

inline

Definition at line 2167 of file Stmt.h.

References getElse(), clang::Stmt::getEndLoc(), and getThen().

getIfLoc()

SourceLocation clang::IfStmt::getIfLoc ( ) const

inline

Definition at line 2120 of file Stmt.h.

References clang::Stmt::IfStmtBits.

Referenced by getBeginLoc().

getInit() [1/2]

Stmt * clang::IfStmt::getInit ( )

inline

Definition at line 2104 of file Stmt.h.

References hasInitStorage().

Referenced by EvaluateStmt().

getInit() [2/2]

const Stmt * clang::IfStmt::getInit ( ) const

inline

Definition at line 2109 of file Stmt.h.

References hasInitStorage().

getLParenLoc()

SourceLocation clang::IfStmt::getLParenLoc ( ) const

inline

Definition at line 2172 of file Stmt.h.

getNondiscardedCase() [1/2]

std::optional< Stmt * > IfStmt::getNondiscardedCase

(

const ASTContext &

Ctx

)

Definition at line 1005 of file Stmt.cpp.

References clang::Expr::EvaluateKnownConstInt(), getCond(), getElse(), getThen(), and isConstexpr().

getNondiscardedCase() [2/2]

std::optional< const Stmt * > IfStmt::getNondiscardedCase

(

const ASTContext &

Ctx

)

const

If this is an 'if constexpr', determine which substatement will be taken.

Otherwise, or if the condition is value-dependent, returns std::nullopt.

Definition at line 1012 of file Stmt.cpp.

References getNondiscardedCase(), and clang::Result.

Referenced by getNondiscardedCase(), and clang::EvaluatedExprVisitorBase< Ptr, ImplClass >::VisitIfStmt().

getRParenLoc()

SourceLocation clang::IfStmt::getRParenLoc ( ) const

inline

Definition at line 2174 of file Stmt.h.

getStatementKind()

IfStatementKind clang::IfStmt::getStatementKind ( ) const

inline

Definition at line 2155 of file Stmt.h.

References clang::Stmt::IfStmtBits.

Referenced by isConsteval(), isConstexpr(), isNegatedConsteval(), and isNonNegatedConsteval().

getThen() [1/2]

Stmt * clang::IfStmt::getThen ( )

inline

Definition at line 2043 of file Stmt.h.

Referenced by CheckConstexprFunctionStmt(), DiagUninitUse(), EvaluateStmt(), getEndLoc(), getNondiscardedCase(), and isIdenticalStmt().

getThen() [2/2]

const Stmt * clang::IfStmt::getThen ( ) const

inline

Definition at line 2044 of file Stmt.h.

hasElseStorage()

bool clang::IfStmt::hasElseStorage ( ) const

inline

True if this IfStmt has storage for an else statement.

Definition at line 2029 of file Stmt.h.

References clang::Stmt::IfStmtBits.

Referenced by getElse(), getElseLoc(), setElse(), setElseLoc(), and clang::JSONNodeDumper::VisitIfStmt().

hasInitStorage()

bool clang::IfStmt::hasInitStorage ( ) const

inline

True if this IfStmt has the storage for an init statement.

Definition at line 2023 of file Stmt.h.

References clang::Stmt::IfStmtBits.

Referenced by getInit(), setInit(), and clang::JSONNodeDumper::VisitIfStmt().

hasVarStorage()

bool clang::IfStmt::hasVarStorage ( ) const

inline

True if this IfStmt has storage for a variable declaration.

Definition at line 2026 of file Stmt.h.

References clang::Stmt::IfStmtBits.

Referenced by getConditionVariableDeclStmt(), setConditionVariable(), setConditionVariableDeclStmt(), and clang::JSONNodeDumper::VisitIfStmt().

isConsteval()

bool clang::IfStmt::isConsteval ( ) const

inline

Definition at line 2134 of file Stmt.h.

References clang::ConstevalNegated, clang::ConstevalNonNegated, and getStatementKind().

Referenced by children(), EvaluateStmt(), and clang::JSONNodeDumper::VisitIfStmt().

isConstexpr()

bool clang::IfStmt::isConstexpr ( ) const

inline

Definition at line 2147 of file Stmt.h.

References clang::Constexpr, and getStatementKind().

Referenced by getNondiscardedCase(), and clang::JSONNodeDumper::VisitIfStmt().

isNegatedConsteval()

bool clang::IfStmt::isNegatedConsteval ( ) const

inline

Definition at line 2143 of file Stmt.h.

References clang::ConstevalNegated, and getStatementKind().

Referenced by clang::JSONNodeDumper::VisitIfStmt().

isNonNegatedConsteval()

bool clang::IfStmt::isNonNegatedConsteval ( ) const

inline

Definition at line 2139 of file Stmt.h.

References clang::ConstevalNonNegated, and getStatementKind().

Referenced by EvaluateStmt().

isObjCAvailabilityCheck()

bool IfStmt::isObjCAvailabilityCheck

(

)

const

Definition at line 1001 of file Stmt.cpp.

References getCond().

setCond()

void clang::IfStmt::setCond ( Expr *  Cond )

inline

Definition at line 2039 of file Stmt.h.

setConditionVariable()

void IfStmt::setConditionVariable	(	const ASTContext &	Ctx,
		VarDecl *	V
	)

Set the condition variable for this if statement.

The if statement must have storage for the condition variable.

Definition at line 987 of file Stmt.cpp.

References clang::SourceRange::getBegin(), clang::SourceRange::getEnd(), hasVarStorage(), and V.

setConditionVariableDeclStmt()

void clang::IfStmt::setConditionVariableDeclStmt ( DeclStmt *  CondVar )

inline

Definition at line 2099 of file Stmt.h.

References hasVarStorage().

setElse()

void clang::IfStmt::setElse ( Stmt *  Else )

inline

Definition at line 2062 of file Stmt.h.

References hasElseStorage().

setElseLoc()

void clang::IfStmt::setElseLoc ( SourceLocation  ElseLoc )

inline

Definition at line 2128 of file Stmt.h.

References hasElseStorage().

setIfLoc()

void clang::IfStmt::setIfLoc ( SourceLocation  IfLoc )

inline

Definition at line 2121 of file Stmt.h.

References clang::Stmt::IfStmtBits.

setInit()

void clang::IfStmt::setInit ( Stmt *  Init )

inline

Definition at line 2114 of file Stmt.h.

References hasInitStorage().

setLParenLoc()

void clang::IfStmt::setLParenLoc ( SourceLocation  Loc )

inline

Definition at line 2173 of file Stmt.h.

setRParenLoc()

void clang::IfStmt::setRParenLoc ( SourceLocation  Loc )

inline

Definition at line 2175 of file Stmt.h.

setStatementKind()

void clang::IfStmt::setStatementKind ( IfStatementKind  Kind )

inline

Definition at line 2151 of file Stmt.h.

References clang::Stmt::IfStmtBits.

setThen()

void clang::IfStmt::setThen ( Stmt *  Then )

inline

Definition at line 2048 of file Stmt.h.

---

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

• include/clang/AST/Stmt.h
• lib/AST/Stmt.cpp