ConstIterator.hpp

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/*
 * Copyright (C) 2004  Andrew Sutton
 *
 * 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 2.1 of the License, 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
 *
 * Contact:
 *   Andrew Sutton  asutton@cs.kent.edu
 */

#ifndef OMF_CONSTITERATOR_HPP
#define OMF_CONSTITERATOR_HPP

// std includes
#include <list>
#include <set>
#include <map>

namespace OMF
{
  // forward declarations
  class Object;
  class List;
  class Set;

  class ConstIterator
  {
    friend class List;
    friend class Set;

    typedef std::list<Object *>::const_iterator ListConstIterator;
    typedef std::set<Object *>::const_iterator SetConstIterator;
    typedef std::map<unsigned, Object *>::const_iterator MapConstIterator;

    enum Mode {
      None,
      List,
      Set,
      Map
    };

  public:
    ConstIterator();
    ConstIterator(const ConstIterator &i);
    ConstIterator(const ListConstIterator &i);
    ConstIterator(const SetConstIterator &i);
    ConstIterator(const MapConstIterator &i);

    const ConstIterator &operator =(const ConstIterator &i);
    const ConstIterator &operator =(const ListConstIterator &i);
    const ConstIterator &operator =(const SetConstIterator &i);
    const ConstIterator &operator =(const MapConstIterator &i);

    Object *operator *();
    Object *operator ->();

    ConstIterator &operator ++();
    ConstIterator operator ++(int);
    ConstIterator &operator --();
    ConstIterator operator --(int);

    bool operator ==(const ConstIterator &i);
    bool operator !=(const ConstIterator &i);

  private:
    Mode    _mode;    
    ListConstIterator _iList;   
    SetConstIterator  _iSet;    
    MapConstIterator  _iMap;    
  };
}

#endif

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