text: /* Copyright 2003-2008 Joaquin M Lopez Munoz.
   * Distributed under the Boost Software License, Version 1.0.
   * (See accompanying file LICENSE_1_0.txt or copy at
   * http://www.boost.org/LICENSE_1_0.txt)
   *
   * See http://www.boost.org/libs/multi_index for library home page.
   */
  
  #ifndef BOOST_MULTI_INDEX_DETAIL_BIDIR_NODE_ITERATOR_HPP
  #define BOOST_MULTI_INDEX_DETAIL_BIDIR_NODE_ITERATOR_HPP
  
  #if defined(_MSC_VER)&&(_MSC_VER>=1200)
  #pragma once
  #endif
  
  #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
  #include <boost/operators.hpp>
  
  #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
  #include <boost/serialization/nvp.hpp>
  #include <boost/serialization/split_member.hpp>
  #endif
  
  namespace boost{
  
  namespace multi_index{
  
  namespace detail{
  
  /* Iterator class for node-based indices with bidirectional
   * iterators (ordered and sequenced indices.)
   */
  
  template<typename Node>
  class bidir_node_iterator:
    public bidirectional_iterator_helper<
      bidir_node_iterator<Node>,
      typename Node::value_type,
      std::ptrdiff_t,
      const typename Node::value_type*,
      const typename Node::value_type&>
  {
  public:
    bidir_node_iterator(){}
    explicit bidir_node_iterator(Node* node_):node(node_){}
  
    const typename Node::value_type& operator*()const
    {
      return node->value();
    }
  
    bidir_node_iterator& operator++()
    {
      Node::increment(node);
      return *this;
    }
  
    bidir_node_iterator& operator--()
    {
      Node::decrement(node);
      return *this;
    }
  
  #if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
    /* Serialization. As for why the following is public,
     * see explanation in safe_mode_iterator notes in safe_mode.hpp.
     */
  
    BOOST_SERIALIZATION_SPLIT_MEMBER()
  
    typedef typename Node::base_type node_base_type;
  
    template<class Archive>
    void save(Archive& ar,const unsigned int)const
    {
      node_base_type* bnode=node;
      ar<<serialization::make_nvp("pointer",bnode);
    }
  
    template<class Archive>
    void load(Archive& ar,const unsigned int)
    {
      node_base_type* bnode;
      ar>>serialization::make_nvp("pointer",bnode);
      node=static_cast<Node*>(bnode);
    }
  #endif
  
    /* get_node is not to be used by the user */
  
    typedef Node node_type;
  
    Node* get_node()const{return node;}
  
  private:
    Node* node;
  };
  
  template<typename Node>
  bool operator==(
    const bidir_node_iterator<Node>& x,
    const bidir_node_iterator<Node>& y)
  {
    return x.get_node()==y.get_node();
  }
  
  } /* namespace multi_index::detail */
  
  } /* namespace multi_index */
  
  } /* namespace boost */
  
  #endif
  