operations_research::IntExpr Class Reference

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

#include <constraint_solver.h>

Inheritance diagram for operations_research::IntExpr:

List of all members.

Public Member Functions
	IntExpr (Solver *const s)
virtual	~IntExpr ()
virtual int64	Min () const =0
virtual void	SetMin (int64 m)=0
virtual int64	Max () const =0
virtual void	SetMax (int64 m)=0
virtual void	Range (int64 *l, int64 *u)
	By default calls Min() and Max(), but can be redefined when Min and Max code can be factorized.
virtual void	SetRange (int64 l, int64 u)
	This method sets both the min and the max of the expression.
virtual void	SetValue (int64 v)
	This method sets the value of the expression.
virtual bool	Bound () const
	Returns true if the min and the max of the expression are equal.
virtual bool	IsVar () const
	Returns true if the expression is indeed a variable.
virtual IntVar *	Var ()=0
	Creates a variable from the expression.
IntVar *	VarWithName (const string &name)
	Creates a variable from the expression and set the name of the resulting var.
virtual void	WhenRange (Demon *d)=0
	Attach a demon that will watch the min or the max of the expression.
virtual void	Accept (ModelVisitor *const visitor) const
	Accepts the given visitor.

---

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 3687 of file constraint_solver.h.

---

Constructor & Destructor Documentation

operations_research::IntExpr::IntExpr

(

Solver *const

s

)

[inline, explicit]

Definition at line 3689 of file constraint_solver.h.

virtual operations_research::IntExpr::~IntExpr

(

)

[inline, virtual]

Definition at line 3690 of file constraint_solver.h.

---

Member Function Documentation

virtual int64 operations_research::IntExpr::Min

(

)

const [pure virtual]

virtual void operations_research::IntExpr::SetMin

(

int64

m

)

[pure virtual]

virtual int64 operations_research::IntExpr::Max

(

)

const [pure virtual]

virtual void operations_research::IntExpr::SetMax

(

int64

m

)

[pure virtual]

virtual void operations_research::IntExpr::Range	(	int64 *	l,
		int64 *	u
	)			[inline, virtual]

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

Definition at line 3699 of file constraint_solver.h.

virtual void operations_research::IntExpr::SetRange	(	int64	l,
		int64	u
	)			[inline, virtual]

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

Definition at line 3704 of file constraint_solver.h.

virtual void operations_research::IntExpr::SetValue

(

int64

v

)

[inline, virtual]

This method sets the value of the expression.

Definition at line 3710 of file constraint_solver.h.

virtual bool operations_research::IntExpr::Bound

(

)

const [inline, virtual]

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

Definition at line 3713 of file constraint_solver.h.

virtual bool operations_research::IntExpr::IsVar

(

)

const [inline, virtual]

Returns true if the expression is indeed a variable.

Reimplemented in operations_research::IntVar.

Definition at line 3716 of file constraint_solver.h.

virtual IntVar* operations_research::IntExpr::Var

(

)

[pure virtual]

Creates a variable from the expression.

Implemented in operations_research::IntVar, and operations_research::BaseIntExpr.

IntVar * operations_research::IntExpr::VarWithName

(

const string &

name

)

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

IntExpr.

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 46 of file expressions.cc.

virtual void operations_research::IntExpr::WhenRange

(

Demon *

d

)

[pure virtual]

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

void operations_research::IntExpr::Accept

(

ModelVisitor *const

visitor

)

const [virtual]

Accepts the given visitor.

Class IntExpr.

We no longer need those.

Reimplemented in operations_research::IntVar.

Definition at line 3259 of file constraint_solver.cc.

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

• or-tools/src/constraint_solver/constraint_solver.h
• or-tools/src/constraint_solver/constraint_solver.cc
• or-tools/src/constraint_solver/expressions.cc