Detailed Description

Defines operators which change the value of variables; each neighbor corresponds to one modified variable. Sub-classes have to define ModifyValue which determines what the new variable value is going to be (given the current value and the variable).

Definition at line 1350 of file constraint_solveri.h.

#include <constraint_solveri.h>

Inheritance diagram for operations_research::ChangeValue:

Public Member Functions
	ChangeValue (const std::vector< IntVar * > &vars)
	--— ChangeValue Operators --—
	~ChangeValue () override
virtual int64_t	ModifyValue (int64_t index, int64_t value)=0
Public Member Functions inherited from operations_research::IntVarLocalSearchOperator
	IntVarLocalSearchOperator (const std::vector< IntVar * > &vars, bool keep_inverse_values=false)
	~IntVarLocalSearchOperator () override
bool	HoldsDelta () const override
void	Start (const Assignment *assignment) override
virtual bool	IsIncremental () const
int	Size () const
int64_t	Value (int64_t index) const
IntVar *	Var (int64_t index) const
	Returns the variable of given index.
virtual bool	SkipUnchanged (int) const
int64_t	OldValue (int64_t index) const
int64_t	PrevValue (int64_t index) const
void	SetValue (int64_t index, int64_t value)
bool	Activated (int64_t index) const
void	Activate (int64_t index)
void	Deactivate (int64_t index)
bool	ApplyChanges (Assignment delta, Assignment deltadelta) const
void	RevertChanges (bool change_was_incremental)
void	AddVars (const std::vector< IntVar * > &vars)
bool	MakeNextNeighbor (Assignment delta, Assignment deltadelta) override
	--— Base operator class for operators manipulating IntVars --—
Public Member Functions inherited from operations_research::LocalSearchOperator
	LocalSearchOperator ()
	~LocalSearchOperator () override
virtual void	EnterSearch ()
virtual void	Reset ()
virtual const LocalSearchOperator *	Self () const
virtual bool	HasFragments () const
Public Member Functions inherited from operations_research::BaseObject
	BaseObject ()
	BaseObject (const BaseObject &)=delete
	This type is neither copyable nor movable.
BaseObject &	operator= (const BaseObject &)=delete
virtual	~BaseObject ()=default
virtual std::string	DebugString () const

Protected Member Functions
bool	MakeOneNeighbor () override
	This method should not be overridden. Override ModifyValue() instead.
Protected Member Functions inherited from operations_research::IntVarLocalSearchOperator
int64_t	InverseValue (int64_t index) const
int64_t	OldInverseValue (int64_t index) const
void	AddToAssignment (IntVar var, int64_t value, bool active, std::vector< int > assignment_indices, int64_t index, Assignment *assignment) const

Constructor & Destructor Documentation

◆ ChangeValue()

operations_research::ChangeValue::ChangeValue ( const std::vector< IntVar * > & vars )

explicit

--— ChangeValue Operators --—

Definition at line 299 of file local_search.cc.

◆ ~ChangeValue()

operations_research::ChangeValue::~ChangeValue ( )

override

Definition at line 302 of file local_search.cc.

Member Function Documentation

◆ MakeOneNeighbor()

bool operations_research::ChangeValue::MakeOneNeighbor ( )

overrideprotectedvirtual

This method should not be overridden. Override ModifyValue() instead.

Reimplemented from operations_research::IntVarLocalSearchOperator.

Definition at line 304 of file local_search.cc.

◆ ModifyValue()

virtual int64_t operations_research::ChangeValue::ModifyValue	(	int64_t	index,
		int64_t	value )

pure virtual

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

ortools/constraint_solver/constraint_solveri.h
ortools/constraint_solver/local_search.cc