FastVector.h

// FastVector.h -- Interface to fast-erasing vectors.

/*
 * Copyright (C) 1997, 1998, 2003 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: FastVector_8h-source.html,v 1.1 2005/05/25 12:37:18 tudor Exp $

#ifndef _CSP_KERNEL_FastVector_H
#define _CSP_KERNEL_FastVector_H


CSP_NAMESPACE_BEGIN(csp);


template<class T>
class FastVector :
    public vector<T>
{
  public:
    typedef typename vector<T>::iterator iterator;
    typedef typename vector<T>::const_iterator const_iterator;

    iterator fast_erase(const iterator position)
    {
        assert(position < vector<T>::end());

        if (position + 1 != vector<T>::end())
            *position = vector<T>::back();

        vector<T>::pop_back();
        return position;
    }

    iterator erase(const iterator position)
    {
        return g_predictable ?
            vector<T>::erase(position) :
            fast_erase(position);
    }

    iterator insert(const T& x)
    {
        if (g_predictable)
            return vector<T>::insert(
                lower_bound(vector<T>::begin(),
                            vector<T>::end(),
                            x, id_less<T>()),
                x);
        else
        {
            vector<T>::push_back(x);
            return vector<T>::end();
        }
    }
};


CSP_NAMESPACE_END(csp);


#endif // _CSP_KERNEL_FastVector_H

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