old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/detail/bin_search_tree_/node_iterators.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 node_iterators.hpp
  42  * Contains an implementation class for bin_search_tree_.
  43  */
  44
  45 class const_node_it_
  46 {
  47
  48 public:
  49
  50   typedef trivial_iterator_tag iterator_category;
  51
  52   typedef trivial_iterator_difference_type difference_type;
  53
  54   typedef const_iterator value_type;
  55
  56   typedef const_iterator*  pointer;
  57
  58   typedef const_iterator*  const_pointer;
  59
  60   typedef const_iterator&  reference;
  61
  62   typedef const iterator&  const_reference;
  63
  64 public:
  65
  66   inline
  67   const_node_it_(const node_pointer p_nd = NULL)
  68
  69     : m_p_nd(const_cast<node_pointer>(p_nd))
  70   { }
  71
  72   inline const_iterator
  73   operator*() const
  74   {
  75     return (const_iterator(m_p_nd));
  76   }
  77
  78   inline const_node_it_
  79   l_child() const
  80   {
  81     return (const_node_it_(m_p_nd->m_p_left));
  82   }
  83
  84   inline const_node_it_
  85   r_child() const
  86   {
  87     return (const_node_it_(m_p_nd->m_p_right));
  88   }
  89
  90   inline bool
  91   operator==(const const_node_it_& r_other) const
  92   {
  93     return (m_p_nd == r_other.m_p_nd);
  94   }
  95
  96   inline bool
  97   operator!=(const const_node_it_& r_other) const
  98   {
  99     return (m_p_nd != r_other.m_p_nd);
 100   }
 101
 102 private:
 103
 104   friend class PB_ASSOC_CLASS_C_DEC;
 105
 106 public:
 107   node_pointer m_p_nd;
 108 };
 109
 110 class node_it_ :
 111   public const_node_it_
 112
 113 {
 114
 115 public:
 116
 117   inline
 118   node_it_(const node_pointer p_nd = NULL)
 119
 120     : const_node_it_(const_cast<node_pointer>(p_nd))
 121   { }
 122
 123   inline iterator
 124   operator*() const
 125   {
 126     return (iterator(const_node_it_::m_p_nd));
 127   }
 128
 129   inline node_it_
 130   l_child()
 131   {
 132     return (node_it_(const_node_it_::m_p_nd->m_p_left));
 133   }
 134
 135   inline node_it_
 136   r_child()
 137   {
 138     return (node_it_(const_node_it_::m_p_nd->m_p_right));
 139   }
 140
 141 private:
 142   friend class PB_ASSOC_CLASS_C_DEC;
 143 };
 144