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diff --git a/boost/intrusive/detail/iterator.hpp b/boost/intrusive/detail/iterator.hpp
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+/////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga  2014-2014
+//
+// 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/intrusive for documentation.
+//
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTRUSIVE_DETAIL_ITERATOR_HPP
+#define BOOST_INTRUSIVE_DETAIL_ITERATOR_HPP
+
+#ifndef BOOST_CONFIG_HPP
+#  include <boost/config.hpp>
+#endif
+
+#if defined(BOOST_HAS_PRAGMA_ONCE)
+#  pragma once
+#endif
+
+#include <cstddef>
+#include <boost/intrusive/detail/std_fwd.hpp>
+#include <boost/move/detail/iterator_traits.hpp>
+#include <boost/move/detail/meta_utils_core.hpp>
+
+namespace boost {
+namespace intrusive {
+
+using boost::movelib::iterator_traits;
+
+////////////////////
+//    iterator
+////////////////////
+template<class Category, class T, class Distance, class Pointer = T*, class Reference = T&>
+struct iterator
+{
+   typedef Category  iterator_category;
+   typedef T         value_type;
+   typedef Distance  difference_type;
+   typedef Pointer   pointer;
+   typedef Reference reference;
+};
+
+////////////////////////////////////////
+//    iterator_[dis|en]able_if_tag
+////////////////////////////////////////
+template<class I, class Tag, class R = void>
+struct iterator_enable_if_tag
+   : ::boost::move_detail::enable_if_c
+      < ::boost::move_detail::is_same
+         < typename boost::intrusive::iterator_traits<I>::iterator_category 
+         , Tag
+         >::value
+         , R>
+{};
+
+template<class I, class Tag, class R = void>
+struct iterator_disable_if_tag
+   : ::boost::move_detail::enable_if_c
+      < !::boost::move_detail::is_same
+         < typename boost::intrusive::iterator_traits<I>::iterator_category 
+         , Tag
+         >::value
+         , R>
+{};
+
+////////////////////////////////////////
+//    iterator_[dis|en]able_if_tag_difference_type
+////////////////////////////////////////
+template<class I, class Tag>
+struct iterator_enable_if_tag_difference_type
+   : iterator_enable_if_tag<I, Tag, typename boost::intrusive::iterator_traits<I>::difference_type>
+{};
+
+template<class I, class Tag>
+struct iterator_disable_if_tag_difference_type
+   : iterator_disable_if_tag<I, Tag, typename boost::intrusive::iterator_traits<I>::difference_type>
+{};
+
+////////////////////
+//    advance
+////////////////////
+template<class InputIt, class Distance> inline
+typename iterator_enable_if_tag<InputIt, std::input_iterator_tag>::type
+   iterator_advance(InputIt& it, Distance n)
+{
+   while(n--)
+	   ++it;
+}
+
+template<class InputIt, class Distance> inline
+typename iterator_enable_if_tag<InputIt, std::forward_iterator_tag>::type
+   iterator_advance(InputIt& it, Distance n)
+{
+   while(n--)
+	   ++it;
+}
+
+template<class InputIt, class Distance> inline
+typename iterator_enable_if_tag<InputIt, std::bidirectional_iterator_tag>::type
+   iterator_advance(InputIt& it, Distance n)
+{
+   for (; 0 < n; --n)
+	   ++it;
+   for (; n < 0; ++n)
+	   --it;
+}
+
+template<class InputIt, class Distance> inline
+typename iterator_enable_if_tag<InputIt, std::random_access_iterator_tag>::type
+   iterator_advance(InputIt& it, Distance n)
+{
+   it += n;
+}
+
+////////////////////
+//    distance
+////////////////////
+template<class InputIt> inline
+typename iterator_disable_if_tag_difference_type
+   <InputIt, std::random_access_iterator_tag>::type
+      iterator_distance(InputIt first, InputIt last)
+{
+   typename iterator_traits<InputIt>::difference_type off = 0;
+   while(first != last){
+	   ++off;
+      ++first;
+   }
+   return off;
+}
+
+template<class InputIt> inline
+typename iterator_enable_if_tag_difference_type
+   <InputIt, std::random_access_iterator_tag>::type
+      iterator_distance(InputIt first, InputIt last)
+{
+   typename iterator_traits<InputIt>::difference_type off = last - first;
+   return off;
+}
+
+} //namespace intrusive
+} //namespace boost
+
+#endif //BOOST_INTRUSIVE_DETAIL_ITERATOR_HPP