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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the terms

// of the GNU General Public License as published by the Free Software

// Foundation; either version 3, 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

// General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// <http://www.gnu.org/licenses/>.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software

// is hereby granted without fee, provided that the above copyright

// notice appears in all copies, and that both that copyright notice

// and this permission notice appear in supporting documentation. None

// of the above authors, nor IBM Haifa Research Laboratories, make any

// representation about the suitability of this software for any

// purpose. It is provided "as is" without express or implied

// warranty.

/**

 * @file iterator.hpp

 * Contains an iterator_ class used for ranging over the elements of the

 *    table.

 */

// Range-type iterator.

class iterator_ :

  public const_iterator_

{

public:

  // Category.

  typedef std::forward_iterator_tag iterator_category;

  // Difference type.

  typedef typename Allocator::difference_type difference_type;

  // Iterator's value type.

  typedef value_type_ value_type;

  // Iterator's pointer type.

  typedef pointer_ pointer;

  // Iterator's const pointer type.

  typedef const_pointer_ const_pointer;

  // Iterator's reference type.

  typedef reference_ reference;

  // Iterator's const reference type.

  typedef const_reference_ const_reference;

public:

  // Default constructor.

  inline

  iterator_()

    : const_iterator_(NULL, PB_DS_GEN_POS(), NULL)

  { }

  // Conversion to a point-type iterator.

  inline

  operator point_iterator_()

  {

    return (point_iterator_(

                            const_cast<pointer>(const_iterator_::m_p_value)));

  }

  // Conversion to a point-type iterator.

  inline

  operator const point_iterator_() const

  {

    return (point_iterator_(

                            const_cast<pointer>(const_iterator_::m_p_value)));

  }

  // Access.

  inline pointer

  operator->() const

  {

    _GLIBCXX_DEBUG_ASSERT(base_type::m_p_value != NULL);

    return (const_cast<pointer>(base_type::m_p_value));

  }

  // Access.

  inline reference

  operator*() const

  {

    _GLIBCXX_DEBUG_ASSERT(base_type::m_p_value != NULL);

    return (const_cast<reference>(*base_type::m_p_value));

  }

  // Increments.

  inline iterator_&

  operator++()

  {

    base_type::m_p_tbl->inc_it_state(base_type::m_p_value, base_type::m_pos);

    return (*this);

  }

  // Increments.

  inline iterator_

  operator++(int)

  {

    iterator_ ret =* this;

    base_type::m_p_tbl->inc_it_state(base_type::m_p_value, base_type::m_pos);

    return (ret);

  }

protected:

  typedef const_iterator_ base_type;

protected:

  /**

   *  Constructor used by the table to initiate the generalized

   *      pointer and position (e.g., this is called from within a find()

   *      of a table.

   * */

  inline

  iterator_(pointer p_value, PB_DS_GEN_POS pos, PB_DS_CLASS_C_DEC* p_tbl) : const_iterator_(p_value, pos, p_tbl)

  { }

  friend class PB_DS_CLASS_C_DEC;

};