WeightedDegrees.h

// WeightedDegrees.h -- The interface to a cache of weighted degrees
// for variables.

/*
 * Copyright (C) 2005 Tudor Hulubei <tudor@hulubei.net>.
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2, or (at
 * your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA,
 * 02111-1307, USA.
 */

/*
 * NOTE: This is an interal header file.
 * You should not attempt to use it directly.
 */

// $Id: WeightedDegrees_8h-source.html,v 1.1 2005/05/25 12:37:18 tudor Exp $

#ifndef _CSP_CACHES_WeightedDegrees_H
#define _CSP_CACHES_WeightedDegrees_H


CSP_NAMESPACE_BEGIN(csp);
CSP_NAMESPACE_BEGIN(caches);


class CSP_API WeightedDegrees
{
  public:
    WeightedDegrees() {}

    ulonglong weightedDegree(const Variable& variable);

    void updateWeightedDegree(const Variable& variable);

    void clear() { m_weightedDegrees.clear(); }

    bool empty() { return m_weightedDegrees.empty(); }

  private:
    WeightedDegrees(const WeightedDegrees&);

    WeightedDegrees& operator=(const WeightedDegrees&);

    typedef hash_map<const Variable*, ulonglong> vd_type;

    vd_type m_weightedDegrees;
};


CSP_NAMESPACE_END(cache);
CSP_NAMESPACE_END(csp);


#endif // _CSP_CACHES_WeightedDegrees_H

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