Detailed Description

The class IntExpr is the base of all integer expressions in constraint programming.

It contains the basic protocol for an expression:

setting and modifying its bound
querying if it is bound
listening to events modifying its bounds
casting it into a variable (instance of IntVar)

Definition at line 3961 of file constraint_solver.h.

Public Member Functions
	IntExpr (Solver *const s)

	~IntExpr () override

virtual int64_t	Min () const =0

virtual void	SetMin (int64_t m)=0

virtual int64_t	Max () const =0

virtual void	SetMax (int64_t m)=0

virtual void	Range (int64_t l, int64_t u)
	By default calls Min() and Max(), but can be redefined when Min and Max code can be factorized. More...

virtual void	SetRange (int64_t l, int64_t u)
	This method sets both the min and the max of the expression. More...

virtual void	SetValue (int64_t v)
	This method sets the value of the expression. More...

virtual bool	Bound () const
	Returns true if the min and the max of the expression are equal. More...

virtual bool	IsVar () const
	Returns true if the expression is indeed a variable. More...

virtual IntVar *	Var ()=0
	Creates a variable from the expression. More...

IntVar *	VarWithName (const std::string &name)
	Creates a variable from the expression and set the name of the resulting var. More...

virtual void	WhenRange (Demon *d)=0
	Attach a demon that will watch the min or the max of the expression. More...

void	WhenRange (Solver::Closure closure)
	Attach a demon that will watch the min or the max of the expression. More...

void	WhenRange (Solver::Action action)
	Attach a demon that will watch the min or the max of the expression. More...

virtual void	Accept (ModelVisitor *const visitor) const
	Accepts the given visitor. More...

std::string	DebugString () const override

Solver *	solver () const

void	FreezeQueue ()
	This method freezes the propagation queue. More...

void	UnfreezeQueue ()
	This method unfreezes the propagation queue. More...

void	EnqueueDelayedDemon (Demon *const d)
	This method pushes the demon onto the propagation queue. More...

void	EnqueueVar (Demon *const d)

void	ExecuteAll (const SimpleRevFIFO< Demon * > &demons)

void	EnqueueAll (const SimpleRevFIFO< Demon * > &demons)

void	set_action_on_fail (Solver::Action a)

void	reset_action_on_fail ()
	This method clears the failure callback. More...

void	set_variable_to_clean_on_fail (IntVar *v)
	Shortcut for variable cleaner. More...

virtual std::string	name () const
	Object naming. More...

void	set_name (const std::string &name)

bool	HasName () const
	Returns whether the object has been named or not. More...

virtual std::string	BaseName () const
	Returns a base name for automatic naming. More...

Constructor & Destructor Documentation

◆ IntExpr()

IntExpr ( Solver *const s )

inlineexplicit

Definition at line 3963 of file constraint_solver.h.

◆ ~IntExpr()

~IntExpr ( )

inlineoverride

Definition at line 3964 of file constraint_solver.h.

Member Function Documentation

◆ Accept()

void Accept ( ModelVisitor *const visitor ) const

virtual

Accepts the given visitor.

Reimplemented in PiecewiseLinearExpr, and IntVar.

Definition at line 3347 of file constraint_solver.cc.

◆ BaseName()

std::string BaseName ( ) const

virtualinherited

Returns a base name for automatic naming.

Reimplemented in BooleanVar.

Definition at line 2549 of file constraint_solver.cc.

◆ Bound()

virtual bool Bound ( ) const

inlinevirtual

Returns true if the min and the max of the expression are equal.

Reimplemented in BooleanVar.

Definition at line 3987 of file constraint_solver.h.

◆ DebugString()

std::string DebugString ( ) const

inlineoverridevirtualinherited

Reimplemented from BaseObject.

Reimplemented in GlobalVehicleBreaksConstraint, PiecewiseLinearExpr, IfThenElseCt, BooleanVar, LightIntIntFunctionElementCt< F >, LightIntFunctionElementCt< F >, Pack, Assignment, SequenceVar, and Constraint.

Definition at line 3267 of file constraint_solver.h.

◆ EnqueueAll()

void EnqueueAll ( const SimpleRevFIFO< Demon * > & demons )

inherited

Definition at line 2555 of file constraint_solver.cc.

◆ EnqueueDelayedDemon()

void EnqueueDelayedDemon ( Demon *const d )

inlineinherited

This method pushes the demon onto the propagation queue.

It will be processed directly if the queue is empty. It will be enqueued according to its priority otherwise.

Definition at line 3287 of file constraint_solver.h.

◆ EnqueueVar()

void EnqueueVar ( Demon *const d )

inlineinherited

Definition at line 3288 of file constraint_solver.h.

◆ ExecuteAll()

void ExecuteAll ( const SimpleRevFIFO< Demon * > & demons )

inherited

Definition at line 2551 of file constraint_solver.cc.

◆ FreezeQueue()

void FreezeQueue ( )

inlineinherited

This method freezes the propagation queue.

It is useful when you need to apply multiple modifications at once.

Definition at line 3278 of file constraint_solver.h.

◆ HasName()

bool HasName ( ) const

inherited

Returns whether the object has been named or not.

Definition at line 2547 of file constraint_solver.cc.

◆ IsVar()

virtual bool IsVar ( ) const

inlinevirtual

Returns true if the expression is indeed a variable.

Reimplemented in IntVar.

Definition at line 3990 of file constraint_solver.h.

◆ Max()

virtual int64_t Max ( ) const

pure virtual

Implemented in PiecewiseLinearExpr, and BooleanVar.

◆ Min()

virtual int64_t Min ( ) const

pure virtual

Implemented in PiecewiseLinearExpr, and BooleanVar.

◆ name()

std::string name ( ) const

virtualinherited

Object naming.

Reimplemented in PiecewiseLinearExpr.

Definition at line 2539 of file constraint_solver.cc.

◆ Range()

virtual void Range	(	int64_t *	l,
		int64_t *	u
	)

inlinevirtual

By default calls Min() and Max(), but can be redefined when Min and Max code can be factorized.

Definition at line 3973 of file constraint_solver.h.

◆ reset_action_on_fail()

void reset_action_on_fail ( )

inlineinherited

This method clears the failure callback.

Definition at line 3301 of file constraint_solver.h.

◆ set_action_on_fail()

void set_action_on_fail ( Solver::Action a )

inlineinherited

Definition at line 3295 of file constraint_solver.h.

◆ set_name()

void set_name ( const std::string & name )

inherited

Definition at line 2543 of file constraint_solver.cc.

◆ set_variable_to_clean_on_fail()

void set_variable_to_clean_on_fail ( IntVar * v )

inlineinherited

Shortcut for variable cleaner.

Definition at line 3304 of file constraint_solver.h.

◆ SetMax()

virtual void SetMax ( int64_t m )

pure virtual

Implemented in PiecewiseLinearExpr, and BooleanVar.

◆ SetMin()

virtual void SetMin ( int64_t m )

pure virtual

Implemented in PiecewiseLinearExpr, and BooleanVar.

◆ SetRange()

virtual void SetRange	(	int64_t	l,
		int64_t	u
	)

inlinevirtual

This method sets both the min and the max of the expression.

Reimplemented in BooleanVar, and PiecewiseLinearExpr.

Definition at line 3978 of file constraint_solver.h.

◆ SetValue()

virtual void SetValue ( int64_t v )

inlinevirtual

This method sets the value of the expression.

Definition at line 3984 of file constraint_solver.h.

◆ solver()

Solver* solver ( ) const

inlineinherited

Definition at line 3274 of file constraint_solver.h.

◆ UnfreezeQueue()

void UnfreezeQueue ( )

inlineinherited

This method unfreezes the propagation queue.

All modifications that happened when the queue was frozen will be processed.

Definition at line 3282 of file constraint_solver.h.

◆ Var()

virtual IntVar* Var ( )

pure virtual

Creates a variable from the expression.

Implemented in BaseIntExpr, and IntVar.

◆ VarWithName()

IntVar * VarWithName ( const std::string & name )

Creates a variable from the expression and set the name of the resulting var.

If the expression is already a variable, then it will set the name of the expression, possibly overwriting it. This is just a shortcut to Var() followed by set_name().

Definition at line 51 of file expressions.cc.

◆ WhenRange() [1/3]

virtual void WhenRange ( Demon * d )

pure virtual

Attach a demon that will watch the min or the max of the expression.

Implemented in PiecewiseLinearExpr, and BooleanVar.

◆ WhenRange() [2/3]

void WhenRange ( Solver::Action action )

inline

Attach a demon that will watch the min or the max of the expression.

Definition at line 4010 of file constraint_solver.h.

◆ WhenRange() [3/3]

void WhenRange ( Solver::Closure closure )

inline

Attach a demon that will watch the min or the max of the expression.

Definition at line 4004 of file constraint_solver.h.

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

Detailed Description

Public Member Functions

Constructor & Destructor Documentation

◆ IntExpr()

◆ ~IntExpr()

Member Function Documentation

◆ Accept()

◆ BaseName()

◆ Bound()

◆ DebugString()

◆ EnqueueAll()

◆ EnqueueDelayedDemon()

◆ EnqueueVar()

◆ ExecuteAll()

◆ FreezeQueue()

◆ HasName()

◆ IsVar()

◆ Max()

◆ Min()

◆ name()

◆ Range()

◆ reset_action_on_fail()

◆ set_action_on_fail()

◆ set_name()

◆ set_variable_to_clean_on_fail()

◆ SetMax()

◆ SetMin()

◆ SetRange()

◆ SetValue()

◆ solver()

◆ UnfreezeQueue()

◆ Var()

◆ VarWithName()

◆ WhenRange() [1/3]

◆ WhenRange() [2/3]

◆ WhenRange() [3/3]