140 lines
3.0 KiB
C++
140 lines
3.0 KiB
C++
/* Copyright 2003-2008 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org/libs/multi_index for library home page.
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*/
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#ifndef BOOST_MULTI_INDEX_DETAIL_RND_NODE_ITERATOR_HPP
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#define BOOST_MULTI_INDEX_DETAIL_RND_NODE_ITERATOR_HPP
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#if defined(_MSC_VER)&&(_MSC_VER>=1200)
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#pragma once
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#endif
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#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
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#include <boost/operators.hpp>
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#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
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#include <boost/serialization/nvp.hpp>
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#include <boost/serialization/split_member.hpp>
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#endif
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namespace boost{
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namespace multi_index{
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namespace detail{
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/* Iterator class for node-based indices with random access iterators. */
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template<typename Node>
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class rnd_node_iterator:
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public random_access_iterator_helper<
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rnd_node_iterator<Node>,
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typename Node::value_type,
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std::ptrdiff_t,
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const typename Node::value_type*,
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const typename Node::value_type&>
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{
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public:
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rnd_node_iterator(){}
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explicit rnd_node_iterator(Node* node_):node(node_){}
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const typename Node::value_type& operator*()const
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{
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return node->value();
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}
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rnd_node_iterator& operator++()
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{
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Node::increment(node);
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return *this;
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}
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rnd_node_iterator& operator--()
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{
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Node::decrement(node);
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return *this;
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}
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rnd_node_iterator& operator+=(std::ptrdiff_t n)
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{
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Node::advance(node,n);
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return *this;
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}
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rnd_node_iterator& operator-=(std::ptrdiff_t n)
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{
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Node::advance(node,-n);
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return *this;
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}
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#if !defined(BOOST_MULTI_INDEX_DISABLE_SERIALIZATION)
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/* Serialization. As for why the following is public,
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* see explanation in safe_mode_iterator notes in safe_mode.hpp.
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*/
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BOOST_SERIALIZATION_SPLIT_MEMBER()
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typedef typename Node::base_type node_base_type;
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template<class Archive>
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void save(Archive& ar,const unsigned int)const
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{
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node_base_type* bnode=node;
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ar<<serialization::make_nvp("pointer",bnode);
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}
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template<class Archive>
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void load(Archive& ar,const unsigned int)
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{
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node_base_type* bnode;
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ar>>serialization::make_nvp("pointer",bnode);
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node=static_cast<Node*>(bnode);
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}
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#endif
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/* get_node is not to be used by the user */
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typedef Node node_type;
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Node* get_node()const{return node;}
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private:
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Node* node;
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};
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template<typename Node>
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bool operator==(
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const rnd_node_iterator<Node>& x,
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const rnd_node_iterator<Node>& y)
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{
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return x.get_node()==y.get_node();
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}
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template<typename Node>
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bool operator<(
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const rnd_node_iterator<Node>& x,
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const rnd_node_iterator<Node>& y)
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{
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return Node::distance(x.get_node(),y.get_node())>0;
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}
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template<typename Node>
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std::ptrdiff_t operator-(
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const rnd_node_iterator<Node>& x,
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const rnd_node_iterator<Node>& y)
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{
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return Node::distance(y.get_node(),x.get_node());
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}
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} /* namespace multi_index::detail */
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} /* namespace multi_index */
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} /* namespace boost */
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#endif
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