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CoinPresolveForcing.hpp
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1 /* $Id: CoinPresolveForcing.hpp 1498 2011-11-02 15:25:35Z mjs $ */
2 // Copyright (C) 2002, International Business Machines
3 // Corporation and others. All Rights Reserved.
4 // This code is licensed under the terms of the Eclipse Public License (EPL).
5 
6 #ifndef CoinPresolveForcing_H
7 #define CoinPresolveForcing_H
8 
9 #include "CoinPresolveMatrix.hpp"
10 
15 #define IMPLIED_BOUND 7
16 
31 public:
32  struct action {
33  const int *rowcols;
34  const double *bounds;
35  int row;
36  int nlo;
37  int nup;
38  };
39 private:
40  const int nactions_;
41  // actions_ is owned by the class and must be deleted at destruction
42  const action *const actions_;
43 
44 public:
46  const action *actions,
47  const CoinPresolveAction *next) :
48  CoinPresolveAction(next),
49  nactions_(nactions), actions_(actions) {}
50 
51  const char *name() const;
52 
53  static const CoinPresolveAction *presolve(CoinPresolveMatrix * prob,
54  const CoinPresolveAction *next);
55 
56  void postsolve(CoinPostsolveMatrix *prob) const;
57 
59 };
60 
61 #endif
Abstract base class of all presolve routines.
const char * name() const
A name for debug printing.
forcing_constraint_action(int nactions, const action *actions, const CoinPresolveAction *next)
Declarations for CoinPresolveMatrix and CoinPostsolveMatrix and their common base class CoinPrePostso...
void postsolve(CoinPostsolveMatrix *prob) const
Apply the postsolve transformation for this particular presolve action.
const CoinPresolveAction * next
The next presolve transformation.
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during postsol...
virtual ~forcing_constraint_action()
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during presolv...
forcing_constraint_action & operator=(const forcing_constraint_action &rhs)
static const CoinPresolveAction * presolve(CoinPresolveMatrix *prob, const CoinPresolveAction *next)
Detect and process forcing constraints and useless constraints.