Value.h

// Value.h -- The interface to the super class of all CSP values.

/*
 * Copyright (C) 1997, 1998 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: Value_8h-source.html,v 1.1 2005/05/25 12:37:18 tudor Exp $

#ifndef _CSP_KERNEL_Value_H
#define _CSP_KERNEL_Value_H


CSP_NAMESPACE_BEGIN(csp);


class CSP_API Value
{
  public:
    Value() : m_id(NoId), m_failures(0) {}

    virtual ~Value() {}

    Value(const Value&) { m_id = NoId; m_failures = 0; }

    Value& operator=(const Value&) { m_id = NoId; return *this; }

    void setId(id_t id) { m_id = id; }

    id_t id() const { return m_id; }

    ulonglong failures() const { return m_failures; }

    void incrementFailures() { m_failures++; }

    virtual wostream& print(wostream& wos) const { return wos; }

    friend CSP_API wostream& operator<<(wostream& wos, const Value& value)
    {
        return value.print(wos);
    }

  private:
    // The value's id.
    id_t m_id;

    // The number of consistency failures this value was involved in.
    // See the Filter object.
    ulonglong m_failures;
};


CSP_NAMESPACE_END(csp);


#endif // _CSP_KERNEL_Value_H

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