text: // -*- C++ -*-
  
  // Copyright (C) 2005-2017 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 _Alloc::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;
  
    /// Default constructor.
    inline
    iterator_()
    : const_iterator_(0, PB_DS_GEN_POS(), 0) { }
  
    /// 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.
    pointer
    operator->() const
    {
      _GLIBCXX_DEBUG_ASSERT(base_type::m_p_value != 0);
      return (const_cast<pointer>(base_type::m_p_value));
    }
  
    /// Access.
    reference
    operator*() const
    {
      _GLIBCXX_DEBUG_ASSERT(base_type::m_p_value != 0);
      return (const_cast<reference>(*base_type::m_p_value));
    }
  
    /// Increments.
    iterator_&
    operator++()
    {
      base_type::m_p_tbl->inc_it_state(base_type::m_p_value, base_type::m_pos);
      return *this;
    }
  
    /// Increments.
    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;
  
    /**
     *  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;
  };
  