OverloadCandidateSet - A set of overload candidates, used in C++ overload resolution (C++ 13.3). More...

#include "clang/Sema/Overload.h"

Classes
struct	OperatorRewriteInfo
	Information about operator rewrites to consider when adding operator functions to a candidate set. More...

Public Types
enum	CandidateSetKind { CSK_Normal , CSK_Operator , CSK_InitByUserDefinedConversion , CSK_InitByConstructor , CSK_AddressOfOverloadSet }

using	iterator = SmallVectorImpl< OverloadCandidate >::iterator

Public Member Functions
	OverloadCandidateSet (SourceLocation Loc, CandidateSetKind CSK, OperatorRewriteInfo RewriteInfo={})

	OverloadCandidateSet (const OverloadCandidateSet &)=delete

OverloadCandidateSet &	operator= (const OverloadCandidateSet &)=delete

	~OverloadCandidateSet ()

SourceLocation	getLocation () const

CandidateSetKind	getKind () const

OperatorRewriteInfo	getRewriteInfo () const

bool	shouldDeferDiags (Sema &S, ArrayRef< Expr * > Args, SourceLocation OpLoc)
	Whether diagnostics should be deferred.

bool	isNewCandidate (Decl *F, OverloadCandidateParamOrder PO=OverloadCandidateParamOrder::Normal)
	Determine when this overload candidate will be new to the overload set.

void	exclude (Decl *F)
	Exclude a function from being considered by overload resolution.

void	clear (CandidateSetKind CSK)
	Clear out all of the candidates.

iterator	begin ()

iterator	end ()

size_t	size () const

bool	empty () const

ConversionSequenceList	allocateConversionSequences (unsigned NumConversions)
	Allocate storage for conversion sequences for NumConversions conversions.

OverloadCandidate &	addCandidate (unsigned NumConversions=0, ConversionSequenceList Conversions=std::nullopt)
	Add a new candidate with NumConversions conversion sequence slots to the overload set.

OverloadingResult	BestViableFunction (Sema &S, SourceLocation Loc, OverloadCandidateSet::iterator &Best)
	Find the best viable function on this overload set, if it exists.

SmallVector< OverloadCandidate *, 32 >	CompleteCandidates (Sema &S, OverloadCandidateDisplayKind OCD, ArrayRef< Expr * > Args, SourceLocation OpLoc=SourceLocation(), llvm::function_ref< bool(OverloadCandidate &)> Filter=[](OverloadCandidate &) { return true;})

void	NoteCandidates (PartialDiagnosticAt PA, Sema &S, OverloadCandidateDisplayKind OCD, ArrayRef< Expr * > Args, StringRef Opc="", SourceLocation Loc=SourceLocation(), llvm::function_ref< bool(OverloadCandidate &)> Filter=[](OverloadCandidate &) { return true;})
	When overload resolution fails, prints diagnostic messages containing the candidates in the candidate set.

void	NoteCandidates (Sema &S, ArrayRef< Expr * > Args, ArrayRef< OverloadCandidate * > Cands, StringRef Opc="", SourceLocation OpLoc=SourceLocation())

LangAS	getDestAS ()

void	setDestAS (LangAS AS)

Detailed Description

OverloadCandidateSet - A set of overload candidates, used in C++ overload resolution (C++ 13.3).

Definition at line 1008 of file Overload.h.

Member Typedef Documentation

◆ iterator

using clang::OverloadCandidateSet::iterator = SmallVectorImpl<OverloadCandidate>::iterator

Definition at line 1185 of file Overload.h.

Member Enumeration Documentation

◆ CandidateSetKind

enum clang::OverloadCandidateSet::CandidateSetKind

Enumerator
CSK_Normal	Normal lookup.
CSK_Operator	C++ [over.match.oper]: Lookup of operator function candidates in a call using operator syntax. Candidates that have no parameters of class type will be skipped unless there is a parameter of (reference to) enum type and the corresponding argument is of the same enum type.
CSK_InitByUserDefinedConversion	C++ [over.match.copy]: Copy-initialization of an object of class type by user-defined conversion.
CSK_InitByConstructor	C++ [over.match.ctor], [over.match.list] Initialization of an object of class type by constructor, using either a parenthesized or braced list of arguments.
CSK_AddressOfOverloadSet	C++ [over.match.call.general] Resolve a call through the address of an overload set.

Definition at line 1010 of file Overload.h.

Constructor & Destructor Documentation

◆ OverloadCandidateSet() [1/2]

clang::OverloadCandidateSet::OverloadCandidateSet	(	SourceLocation	Loc,
		CandidateSetKind	CSK,
		OperatorRewriteInfo	RewriteInfo = `{}`
	)

inline

Definition at line 1153 of file Overload.h.

◆ OverloadCandidateSet() [2/2]

clang::OverloadCandidateSet::OverloadCandidateSet ( const OverloadCandidateSet & )

delete

◆ ~OverloadCandidateSet()

clang::OverloadCandidateSet::~OverloadCandidateSet ( )

inline

Definition at line 1158 of file Overload.h.

Member Function Documentation

◆ addCandidate()

OverloadCandidate & clang::OverloadCandidateSet::addCandidate	(	unsigned	NumConversions = `0`,
		ConversionSequenceList	Conversions = `std::nullopt`
	)

inline

Add a new candidate with NumConversions conversion sequence slots to the overload set.

Definition at line 1210 of file Overload.h.

References allocateConversionSequences(), and clang::C.

Referenced by clang::Sema::ActOnExplicitInstantiation(), clang::Sema::AddBuiltinCandidate(), clang::Sema::AddConversionCandidate(), clang::Sema::AddMethodCandidate(), clang::Sema::AddMethodTemplateCandidate(), clang::Sema::AddOverloadCandidate(), clang::Sema::AddSurrogateCandidate(), clang::Sema::AddTemplateConversionCandidate(), and clang::Sema::AddTemplateOverloadCandidate().

◆ allocateConversionSequences()

ConversionSequenceList clang::OverloadCandidateSet::allocateConversionSequences ( unsigned NumConversions )

inline

Allocate storage for conversion sequences for NumConversions conversions.

Definition at line 1196 of file Overload.h.

Referenced by addCandidate(), and clang::Sema::CheckNonDependentConversions().

◆ begin()

iterator clang::OverloadCandidateSet::begin ( )

inline

Definition at line 1187 of file Overload.h.

Referenced by clang::Sema::AddArgumentDependentLookupCandidates(), BestViableFunction(), clang::Sema::BuildCallToObjectOfClassType(), CompleteCandidates(), ComputeSelectedDestructor(), FindConversionForRefInit(), markUnaddressableCandidatesUnviable(), NoteCandidates(), clang::TemplateSpecCandidateSet::NoteCandidates(), and TryUserDefinedConversion().

◆ BestViableFunction()

OverloadingResult OverloadCandidateSet::BestViableFunction	(	Sema &	S,
		SourceLocation	Loc,
		OverloadCandidateSet::iterator &	Best
	)

Find the best viable function on this overload set, if it exists.

Computes the best viable function (C++ 13.3.3) within an overload candidate set.

Parameters

Loc	The location of the function name (or operator symbol) for which overload resolution occurs.
Best	If overload resolution was successful or found a deleted function, `Best` points to the candidate function found.

Returns: The result of overload resolution.

Definition at line 10727 of file SemaOverload.cpp.

References begin(), clang::OverloadCandidate::Best, clang::SemaCUDA::CFP_SameSide, clang::SemaCUDA::CFP_WrongSide, CSK_AddressOfOverloadSet, clang::Sema::CUDA(), clang::Sema::diagnoseEquivalentInternalLinkageDeclarations(), end(), clang::OverloadCandidate::Function, clang::Sema::getCurFunctionDecl(), clang::Sema::getLangOpts(), clang::SemaCUDA::IdentifyPreference(), clang::isBetterOverloadCandidate(), clang::Sema::isEquivalentInternalLinkageDeclaration(), Loc, clang::OverloadCandidate::NotValidBecauseConstraintExprHasError(), clang::OR_Ambiguous, clang::OR_Deleted, clang::OR_No_Viable_Function, clang::OR_Success, and clang::OverloadCandidate::Viable.

Referenced by clang::Sema::ActOnExplicitInstantiation(), clang::Sema::BuildCallToMemberFunction(), clang::Sema::BuildCallToObjectOfClassType(), clang::Sema::BuildForRangeBeginEndCall(), clang::Sema::BuildLiteralOperatorCall(), clang::Sema::BuildOverloadedArrowExpr(), clang::Sema::BuildOverloadedCallExpr(), clang::Sema::buildOverloadedCallSet(), ComputeSelectedDestructor(), clang::Sema::CreateOverloadedArraySubscriptExpr(), clang::Sema::CreateOverloadedBinOp(), clang::Sema::CreateOverloadedUnaryOp(), clang::Sema::DeduceTemplateSpecializationFromInitializer(), clang::InitializationSequence::Diagnose(), clang::Sema::DiagnoseEmptyLookup(), DiagnoseTwoPhaseLookup(), FindConditionalOverload(), FindConversionForRefInit(), clang::InitializationSequence::InitializeFrom(), IsInitializerListConstructorConversion(), IsUserDefinedConversion(), clang::Sema::LookupSpecialMember(), clang::Sema::PerformContextualImplicitConversion(), resolveAllocationOverload(), resolveBuiltinNewDeleteOverload(), ResolveConstructorOverload(), tryDiagnoseOverloadedCast(), TryRefInitWithConversionFunction(), TryTypoCorrectionForCall(), and TryUserDefinedConversion().

◆ clear()

void OverloadCandidateSet::clear ( CandidateSetKind CSK )

Clear out all of the candidates.

Definition at line 1125 of file SemaOverload.cpp.

Referenced by clang::Sema::BuildForRangeBeginEndCall(), clang::Sema::DeduceTemplateSpecializationFromInitializer(), IsInitializerListConstructorConversion(), IsUserDefinedConversion(), ResolveConstructorOverload(), TryRefInitWithConversionFunction(), and TryUserDefinedConversion().

◆ CompleteCandidates()

SmallVector< OverloadCandidate *, 32 > OverloadCandidateSet::CompleteCandidates	(	Sema &	S,
		OverloadCandidateDisplayKind	OCD,
		ArrayRef< Expr * >	Args,
		SourceLocation	OpLoc = `SourceLocation()`,
		llvm::function_ref< bool(OverloadCandidate &)>	Filter = `[](OverloadCandidate &) { return true; }`
	)

Definition at line 12520 of file SemaOverload.cpp.

References begin(), CompleteNonViableCandidate(), end(), clang::OCD_AllCandidates, clang::OCD_AmbiguousCandidates, clang::OCD_ViableCandidates, and size().

Referenced by clang::Sema::BuildOverloadedArrowExpr(), clang::Sema::CreateOverloadedBinOp(), clang::InitializationSequence::Diagnose(), clang::Sema::DiagnoseMultipleUserDefinedConversion(), NoteCandidates(), resolveAllocationOverload(), and shouldDeferDiags().

◆ empty()

bool clang::OverloadCandidateSet::empty ( ) const

inline

Definition at line 1191 of file Overload.h.

Referenced by clang::Sema::ActOnExplicitInstantiation(), clang::Sema::BuildCallToObjectOfClassType(), clang::Sema::BuildForRangeBeginEndCall(), clang::Sema::BuildOverloadedArrowExpr(), clang::Sema::buildOverloadedCallSet(), ComputeSelectedDestructor(), clang::Sema::CreateOverloadedArraySubscriptExpr(), clang::Sema::DiagnoseMultipleUserDefinedConversion(), FinishOverloadedCallExpr(), clang::SemaCodeCompletion::ProduceCallSignatureHelp(), tryDiagnoseOverloadedCast(), and TryReferenceInitializationCore().

◆ end()

iterator clang::OverloadCandidateSet::end ( )

inline

Definition at line 1188 of file Overload.h.

Referenced by clang::Sema::AddArgumentDependentLookupCandidates(), BestViableFunction(), clang::Sema::BuildCallToObjectOfClassType(), chooseRecoveryType(), CompleteCandidates(), DiagnoseTwoPhaseLookup(), FindConversionForRefInit(), FinishOverloadedCallExpr(), markUnaddressableCandidatesUnviable(), NoteCandidates(), clang::TemplateSpecCandidateSet::NoteCandidates(), and TryUserDefinedConversion().

◆ exclude()

void clang::OverloadCandidateSet::exclude ( Decl * F )

inline

Exclude a function from being considered by overload resolution.

Definition at line 1177 of file Overload.h.

References isNewCandidate(), clang::Normal, and clang::Reversed.

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

◆ getDestAS()

LangAS clang::OverloadCandidateSet::getDestAS ( )

inline

Definition at line 1245 of file Overload.h.

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

◆ getKind()

CandidateSetKind clang::OverloadCandidateSet::getKind ( ) const

inline

Definition at line 1161 of file Overload.h.

Referenced by clang::Sema::AddMethodCandidate(), clang::Sema::AddOverloadCandidate(), FinishOverloadedCallExpr(), and mergeCandidatesWithResults().

◆ getLocation()

SourceLocation clang::OverloadCandidateSet::getLocation ( ) const

inline

Definition at line 1160 of file Overload.h.

References Loc.

Referenced by clang::Sema::AddConversionCandidate(), clang::Sema::AddMethodCandidate(), clang::Sema::AddMethodTemplateCandidate(), clang::Sema::AddOverloadCandidate(), clang::Sema::AddSurrogateCandidate(), clang::Sema::AddTemplateConversionCandidate(), clang::Sema::AddTemplateOverloadCandidate(), clang::Sema::CheckNonDependentConversions(), and clang::Sema::LookupOverloadedBinOp().

◆ getRewriteInfo()

OperatorRewriteInfo clang::OverloadCandidateSet::getRewriteInfo ( ) const

inline

Definition at line 1162 of file Overload.h.

Referenced by clang::Sema::AddArgumentDependentLookupCandidates(), clang::Sema::AddMemberOperatorCandidates(), clang::Sema::AddMethodCandidate(), clang::Sema::AddMethodTemplateCandidate(), clang::Sema::AddNonMemberOperatorCandidates(), clang::Sema::AddOverloadCandidate(), clang::Sema::AddTemplateOverloadCandidate(), clang::Sema::CreateOverloadedBinOp(), and clang::Sema::LookupOverloadedBinOp().

◆ isNewCandidate()

bool clang::OverloadCandidateSet::isNewCandidate	(	Decl *	F,
		OverloadCandidateParamOrder	PO = `OverloadCandidateParamOrder::Normal`
	)

inline

Determine when this overload candidate will be new to the overload set.

Definition at line 1169 of file Overload.h.

References clang::Decl::getCanonicalDecl().

Referenced by clang::Sema::AddConversionCandidate(), clang::Sema::AddMethodCandidate(), clang::Sema::AddMethodTemplateCandidate(), clang::Sema::AddOverloadCandidate(), clang::Sema::AddSurrogateCandidate(), clang::Sema::AddTemplateConversionCandidate(), clang::Sema::AddTemplateOverloadCandidate(), and exclude().

◆ NoteCandidates() [1/2]

void OverloadCandidateSet::NoteCandidates	(	PartialDiagnosticAt	PA,
		Sema &	S,
		OverloadCandidateDisplayKind	OCD,
		ArrayRef< Expr * >	Args,
		StringRef	Opc = `""`,
		SourceLocation	Loc = `SourceLocation()`,
		llvm::function_ref< bool(OverloadCandidate &)>	Filter = `[](OverloadCandidate &) { return true; }`
	)

When overload resolution fails, prints diagnostic messages containing the candidates in the candidate set.

Definition at line 12584 of file SemaOverload.cpp.

References begin(), CompleteCandidates(), clang::SemaBase::Diag(), end(), MaybeDiagnoseAmbiguousConstraints(), NoteCandidates(), clang::OCD_AmbiguousCandidates, and shouldDeferDiags().

Referenced by clang::Sema::ActOnExplicitInstantiation(), clang::Sema::BuildCallToMemberFunction(), clang::Sema::BuildCallToObjectOfClassType(), clang::Sema::BuildCXXForRangeStmt(), clang::Sema::BuildLiteralOperatorCall(), BuildNonArrayForRange(), clang::Sema::BuildOverloadedArrowExpr(), CheckCXX98CompatAccessibleCopy(), ComputeSelectedDestructor(), CopyObject(), clang::Sema::CreateOverloadedArraySubscriptExpr(), clang::Sema::CreateOverloadedBinOp(), clang::Sema::CreateOverloadedUnaryOp(), clang::Sema::DeduceTemplateSpecializationFromInitializer(), clang::InitializationSequence::Diagnose(), clang::Sema::DiagnoseMultipleUserDefinedConversion(), clang::Sema::DiagnoseUseOfDeletedFunction(), FinishOverloadedCallExpr(), NoteCandidates(), resolveAllocationOverload(), resolveBuiltinNewDeleteOverload(), and tryDiagnoseOverloadedCast().

◆ NoteCandidates() [2/2]

void OverloadCandidateSet::NoteCandidates	(	Sema &	S,
		ArrayRef< Expr * >	Args,
		ArrayRef< OverloadCandidate * >	Cands,
		StringRef	Opc = `""`,
		SourceLocation	OpLoc = `SourceLocation()`
	)

Definition at line 12608 of file SemaOverload.cpp.

References clang::SemaBase::Diag(), clang::Sema::Diags, E, clang::OverloadCandidate::Function, clang::DiagnosticsEngine::getNumOverloadCandidatesToShow(), clang::DiagnosticsEngine::getShowOverloads(), int, clang::OverloadCandidate::IsSurrogate, NoteAmbiguousUserConversions(), NoteBuiltinOperatorCandidate(), NoteFunctionCandidate(), NoteSurrogateCandidate(), clang::DiagnosticsEngine::overloadCandidatesShown(), clang::Ovl_Best, shouldDeferDiags(), and clang::OverloadCandidate::Viable.

◆ operator=()

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

delete

◆ setDestAS()

void clang::OverloadCandidateSet::setDestAS ( LangAS AS )

inline

Definition at line 1247 of file Overload.h.

References CSK_InitByConstructor, and CSK_InitByUserDefinedConversion.

Referenced by ResolveConstructorOverload(), and TryUserDefinedConversion().

◆ shouldDeferDiags()

bool OverloadCandidateSet::shouldDeferDiags	(	Sema &	S,
		ArrayRef< Expr * >	Args,
		SourceLocation	OpLoc
	)

Whether diagnostics should be deferred.

Definition at line 12563 of file SemaOverload.cpp.

References CompleteCandidates(), clang::Sema::getLangOpts(), clang::OCD_AllCandidates, and clang::ovl_fail_bad_target.

Referenced by clang::Sema::CreateOverloadedBinOp(), and NoteCandidates().

◆ size()

size_t clang::OverloadCandidateSet::size ( ) const

inline

Definition at line 1190 of file Overload.h.

Referenced by clang::Sema::BuildCallToMemberFunction(), clang::Sema::BuildCallToObjectOfClassType(), clang::Sema::BuildLiteralOperatorCall(), clang::Sema::BuildOverloadedArrowExpr(), CompleteCandidates(), CopyObject(), clang::Sema::CreateOverloadedArraySubscriptExpr(), clang::Sema::CreateOverloadedBinOp(), clang::Sema::CreateOverloadedUnaryOp(), FindConversionForRefInit(), IsInitializerListConstructorConversion(), IsUserDefinedConversion(), clang::TemplateSpecCandidateSet::NoteCandidates(), TryConstructorInitialization(), TryRefInitWithConversionFunction(), and TryUserDefinedConversion().

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

include/clang/Sema/Overload.h
lib/Sema/SemaOverload.cpp

Classes

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ iterator

Member Enumeration Documentation

◆ CandidateSetKind

Constructor & Destructor Documentation

◆ OverloadCandidateSet() [1/2]

◆ OverloadCandidateSet() [2/2]

◆ ~OverloadCandidateSet()

Member Function Documentation

◆ addCandidate()

◆ allocateConversionSequences()

◆ begin()

◆ BestViableFunction()

◆ clear()

◆ CompleteCandidates()

◆ empty()

◆ end()

◆ exclude()

◆ getDestAS()

◆ getKind()

◆ getLocation()

◆ getRewriteInfo()

◆ isNewCandidate()

◆ NoteCandidates() [1/2]

◆ NoteCandidates() [2/2]

◆ operator=()

◆ setDestAS()

◆ shouldDeferDiags()

◆ size()