forcing_constraint_action Class Reference

Detect and process forcing constraints and useless constraints. More...

#include <CoinPresolveForcing.hpp>

Inheritance diagram for forcing_constraint_action:

Collaboration diagram for forcing_constraint_action:

Classes
struct	action

Public Member Functions
	forcing_constraint_action (int nactions, const action *actions, const CoinPresolveAction *next)
const char *	name () const
	Construct a postsolve object and add it to the transformation list.
void	postsolve (CoinPostsolveMatrix *prob) const
	Apply the postsolve transformation for this particular presolve action.
virtual	~forcing_constraint_action ()
Public Member Functions inherited from CoinPresolveAction
virtual	~CoinPresolveAction ()
	Virtual destructor.

Static Public Member Functions
static const CoinPresolveAction *	presolve (CoinPresolveMatrix *prob, const CoinPresolveAction *next)
Static Public Member Functions inherited from CoinPresolveAction
static void	throwCoinError (const char *error, const char *ps_routine)
	Stub routine to throw exceptions.

Private Member Functions
	forcing_constraint_action ()
	forcing_constraint_action (const forcing_constraint_action &rhs)
forcing_constraint_action &	operator= (const forcing_constraint_action &rhs)

Private Attributes
const int	nactions_
const action *const	actions_

Additional Inherited Members
Public Attributes inherited from CoinPresolveAction
const CoinPresolveAction *	next
	The next presolve transformation.

Detailed Description

Detect and process forcing constraints and useless constraints.

A constraint is useless if the bounds on the variables prevent the constraint from ever being violated.

A constraint is a forcing constraint if the bounds on the constraint force the value of an involved variable to one of its bounds. A constraint can force more than one variable.

Definition at line 27 of file CoinPresolveForcing.hpp.

Constructor & Destructor Documentation

forcing_constraint_action() [1/3]

forcing_constraint_action::forcing_constraint_action ( )

private

forcing_constraint_action() [2/3]

forcing_constraint_action::forcing_constraint_action ( const forcing_constraint_action & rhs )

private

forcing_constraint_action() [3/3]

forcing_constraint_action::forcing_constraint_action ( int nactions, const action * actions, const CoinPresolveAction * next )

inline

Definition at line 47 of file CoinPresolveForcing.hpp.

~forcing_constraint_action()

virtual forcing_constraint_action::~forcing_constraint_action ( )

virtual

Member Function Documentation

operator=()

forcing_constraint_action & forcing_constraint_action::operator= ( const forcing_constraint_action & rhs )

private

name()

const char * forcing_constraint_action::name ( ) const

virtual

Construct a postsolve object and add it to the transformation list.

This is an `add to head' operation. This object will point to the one passed as the parameter. */ CoinPresolveAction(const CoinPresolveAction *next) : next(next) { } modify next (when building rather than passing) inline void setNext(const CoinPresolveAction *nextAction) { next = nextAction; }

/*! A name for debug printing.

It is expected that the name is not stored in the transform itself.

Implements CoinPresolveAction.

presolve()

const CoinPresolveAction * forcing_constraint_action::presolve ( CoinPresolveMatrix * prob, const CoinPresolveAction * next )

static

postsolve()

void forcing_constraint_action::postsolve ( CoinPostsolveMatrix * prob ) const

virtual

Apply the postsolve transformation for this particular presolve action.

Implements CoinPresolveAction.

Member Data Documentation

nactions_

const int forcing_constraint_action::nactions_

private

Definition at line 42 of file CoinPresolveForcing.hpp.

actions_

const action* const forcing_constraint_action::actions_

private

Definition at line 44 of file CoinPresolveForcing.hpp.

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

• /builddir/build/BUILD/coin-or-CoinUtils-2.11.13-build/CoinUtils-releases-2.11.13/CoinUtils/src/CoinPresolveForcing.hpp