CoinUtils
2.9.0
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CoinUtils
src
CoinPresolveUseless.hpp
Go to the documentation of this file.
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/* $Id: CoinPresolveUseless.hpp 1566 2012-11-29 19:33:56Z lou $ */
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// Copyright (C) 2002, International Business Machines
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// Corporation and others. All Rights Reserved.
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// This code is licensed under the terms of the Eclipse Public License (EPL).
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#ifndef CoinPresolveUseless_H
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#define CoinPresolveUseless_H
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#define USELESS 20
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class
useless_constraint_action
:
public
CoinPresolveAction
{
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struct
action
{
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double
rlo
;
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double
rup
;
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const
int
*
rowcols
;
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const
double
*
rowels
;
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int
row
;
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int
ninrow
;
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};
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const
int
nactions_
;
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const
action
*
const
actions_
;
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useless_constraint_action
(
int
nactions,
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const
action
*actions,
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const
CoinPresolveAction
*
next
);
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public
:
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const
char
*
name
()
const
;
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// These rows are asserted to be useless,
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// that is, given a solution the row activity
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// must be in range.
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static
const
CoinPresolveAction
*
presolve
(
CoinPresolveMatrix
* prob,
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const
int
*useless_rows,
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int
nuseless_rows,
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const
CoinPresolveAction
*
next
);
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void
postsolve
(
CoinPostsolveMatrix
*prob)
const
;
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virtual
~useless_constraint_action
();
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};
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const
CoinPresolveAction
*
testRedundant
(
CoinPresolveMatrix
*prob,
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const
CoinPresolveAction
*next) ;
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#endif
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