gomp-20050608-branch/libstdc++-v3/include/ext/pb_assoc/detail/unordered_iterator/const_iterator.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file const_iterator.hpp
  42  * Contains an iterator class used for const ranging over the elements of the
  43  *   table.
  44  */
  45
  46 class const_iterator_ :
  47   public const_find_iterator_
  48
  49 {
  50
  51 public:
  52
  53   typedef std::forward_iterator_tag iterator_category;
  54
  55   typedef typename Allocator::difference_type difference_type;
  56
  57   typedef mapped_value_type value_type;
  58
  59   typedef mapped_pointer pointer;
  60
  61   typedef const_mapped_pointer const_pointer;
  62
  63   typedef mapped_reference reference;
  64
  65   typedef const_mapped_reference const_reference;
  66
  67 public:
  68
  69   inline
  70   const_iterator_()
  71
  72     : m_p_tbl(NULL)
  73   { }
  74
  75   inline const_iterator_&
  76   operator++()
  77   {
  78     m_p_tbl->inc_it_state(my_base::m_p_value, m_pos);
  79
  80     return (*this);
  81   }
  82
  83   inline const_iterator_
  84   operator++(int)
  85   {
  86     const_iterator_ ret =* this;
  87
  88     m_p_tbl->inc_it_state(my_base::m_p_value, m_pos);
  89
  90     return (ret);
  91   }
  92
  93 protected:
  94
  95   typedef const_find_iterator_ my_base;
  96
  97 protected:
  98
  99   /**
 100    * Constructor used by the table to initiate the generalized
 101    *   pointer and position (e.g., this is called from within a find()
 102    *   of a table.
 103    **/
 104   inline
 105   const_iterator_(const_mapped_pointer p_value, PB_ASSOC_GEN_POS pos, const PB_ASSOC_CLASS_C_DEC* p_tbl) : const_find_iterator_(p_value),
 106                                                                                                            m_p_tbl(p_tbl),
 107                                                                                                            m_pos(pos)
 108   { }
 109
 110 protected:
 111
 112   /**
 113    * Pointer to the table object which created the iterator (used for
 114    *   incrementing its position.
 115    **/
 116   const PB_ASSOC_CLASS_C_DEC* m_p_tbl;
 117
 118   PB_ASSOC_GEN_POS m_pos;
 119
 120   friend class PB_ASSOC_CLASS_C_DEC;
 121 };
 122