boost/boost/multi_index/detail/bidir_node_iterator.hpp

   1 /* Copyright 2003-2006 Joaquín M López Muñoz.
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * See http://www.boost.org/libs/multi_index for library home page.
   7  */
   8
   9 #ifndef BOOST_MULTI_INDEX_DETAIL_BIDIR_NODE_ITERATOR_HPP
  10 #define BOOST_MULTI_INDEX_DETAIL_BIDIR_NODE_ITERATOR_HPP
  11
  12 #if defined(_MSC_VER)&&(_MSC_VER>=1200)
  13 #pragma once
  14 #endif
  15
  16 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
  17 #include <boost/operators.hpp>
  18
  19 #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  20 #include <boost/serialization/nvp.hpp>
  21 #include <boost/serialization/split_member.hpp>
  22 #endif
  23
  24 namespace boost{
  25
  26 namespace multi_index{
  27
  28 namespace detail{
  29
  30 /* Iterator class for node-based indices with bidirectional
  31  * iterators (ordered and sequenced indices.)
  32  */
  33
  34 template<typename Node,typename Derived=mpl::na>
  35 class bidir_node_iterator:
  36   public bidirectional_iterator_helper<
  37     bidir_node_iterator<Node,Derived>,
  38     typename Node::value_type,
  39     std::ptrdiff_t,
  40     const typename Node::value_type*,
  41     const typename Node::value_type&>
  42 {
  43 public:
  44   bidir_node_iterator(){}
  45   explicit bidir_node_iterator(Node* node_):node(node_){}
  46
  47   const typename Node::value_type& operator*()const
  48   {
  49     return node->value();
  50   }
  51
  52   friend bool operator==(
  53     const bidir_node_iterator& x,const bidir_node_iterator& y)
  54   {
  55     return x.node==y.node;
  56   }
  57
  58   bidir_node_iterator& operator++()
  59   {
  60     Node::increment(node);
  61     return *this;
  62   }
  63
  64   bidir_node_iterator& operator--()
  65   {
  66     Node::decrement(node);
  67     return *this;
  68   }
  69
  70 #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  71   /* Serialization. As for why the following is public,
  72    * see explanation in safe_mode_iterator notes in safe_mode.hpp.
  73    */
  74
  75   BOOST_SERIALIZATION_SPLIT_MEMBER()
  76
  77   typedef typename Node::base_type node_base_type;
  78
  79   template<class Archive>
  80   void save(Archive& ar,const unsigned int)const
  81   {
  82     node_base_type* bnode=node;
  83     ar<<serialization::make_nvp("pointer",bnode);
  84   }
  85
  86   template<class Archive>
  87   void load(Archive& ar,const unsigned int)
  88   {
  89     node_base_type* bnode;
  90     ar>>serialization::make_nvp("pointer",bnode);
  91     node=static_cast<Node*>(bnode);
  92   }
  93 #endif
  94
  95   /* get_node is not to be used by the user */
  96
  97   typedef Node node_type;
  98
  99   Node* get_node()const{return node;}
 100
 101 private:
 102   Node* node;
 103 };
 104
 105 } /* namespace multi_index::detail */
 106
 107 } /* namespace multi_index */
 108
 109 } /* namespace boost */
 110
 111 #endif