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duprow_action Class Reference

Detect and remove duplicate rows. More...

#include <CoinPresolveDupcol.hpp>

+ Inheritance diagram for duprow_action:
+ Collaboration diagram for duprow_action:

Classes

struct  action
 

Public Member Functions

const char * name () const
 A name for debug printing. More...
 
void postsolve (CoinPostsolveMatrix *prob) const
 Apply the postsolve transformation for this particular presolve action. More...
 
- Public Member Functions inherited from CoinPresolveAction
 CoinPresolveAction (const CoinPresolveAction *next)
 Construct a postsolve object and add it to the transformation list. More...
 
void setNext (const CoinPresolveAction *nextAction)
 modify next (when building rather than passing) More...
 
virtual ~CoinPresolveAction ()
 Virtual destructor. More...
 

Static Public Member Functions

static const CoinPresolveActionpresolve (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. More...
 

Private Member Functions

 duprow_action ()
 
 duprow_action (int nactions, const action *actions, const CoinPresolveAction *next)
 

Private Attributes

const int nactions_
 
const action *const actions_
 

Additional Inherited Members

- Public Attributes inherited from CoinPresolveAction
const CoinPresolveActionnext
 The next presolve transformation. More...
 

Detailed Description

Detect and remove duplicate rows.

The algorithm to detect duplicate rows is as outlined for dupcol_action.

If the feasible interval for one constraint is strictly contained in the other, the tighter (contained) constraint is kept. If the feasible intervals are disjoint, the problem is infeasible. If the feasible intervals overlap, both constraints are kept.

duprow_action is definitely a work in progress; postsolve is unimplemented. This doesn't matter as it uses useless_constraint.

Definition at line 87 of file CoinPresolveDupcol.hpp.

Constructor & Destructor Documentation

duprow_action::duprow_action ( )
inlineprivate

Definition at line 97 of file CoinPresolveDupcol.hpp.

duprow_action::duprow_action ( int  nactions,
const action actions,
const CoinPresolveAction next 
)
inlineprivate

Definition at line 98 of file CoinPresolveDupcol.hpp.

Member Function Documentation

const char* duprow_action::name ( ) const
virtual

A name for debug printing.

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

Implements CoinPresolveAction.

static const CoinPresolveAction* duprow_action::presolve ( CoinPresolveMatrix prob,
const CoinPresolveAction next 
)
static
void duprow_action::postsolve ( CoinPostsolveMatrix prob) const
virtual

Apply the postsolve transformation for this particular presolve action.

Implements CoinPresolveAction.

Member Data Documentation

const int duprow_action::nactions_
private

Definition at line 94 of file CoinPresolveDupcol.hpp.

const action* const duprow_action::actions_
private

Definition at line 95 of file CoinPresolveDupcol.hpp.


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