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diff --git a/boost/range/iterator_range_core.hpp b/boost/range/iterator_range_core.hpp
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+// Boost.Range library
+//
+//  Copyright Neil Groves & Thorsten Ottosen & Pavol Droba 2003-2004.
+//  Use, modification and distribution is subject to 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)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+#ifndef BOOST_RANGE_ITERATOR_RANGE_CORE_HPP_INCLUDED
+#define BOOST_RANGE_ITERATOR_RANGE_CORE_HPP_INCLUDED
+
+#include <boost/config.hpp> // Define __STL_CONFIG_H, if appropriate.
+#include <boost/detail/workaround.hpp>
+
+#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500))
+    #pragma warning( push )
+    #pragma warning( disable : 4996 )
+#endif
+
+#include <boost/assert.hpp>
+#include <boost/iterator/iterator_traits.hpp>
+#include <boost/iterator/iterator_facade.hpp>
+#include <boost/mpl/or.hpp>
+#include <boost/type_traits/is_abstract.hpp>
+#include <boost/type_traits/is_array.hpp>
+#include <boost/type_traits/is_pointer.hpp>
+#include <boost/range/functions.hpp>
+#include <boost/range/iterator.hpp>
+#include <boost/range/difference_type.hpp>
+#include <boost/range/algorithm/equal.hpp>
+#include <boost/range/detail/safe_bool.hpp>
+#include <boost/utility/enable_if.hpp>
+#include <iterator>
+#include <algorithm>
+#include <cstddef>
+
+/*! \file
+    Defines the \c iterator_class and related functions.
+    \c iterator_range is a simple wrapper of iterator pair idiom. It provides
+    a rich subset of Container interface.
+*/
+
+
+namespace boost
+{
+    namespace iterator_range_detail
+    {
+        //
+        // The functions adl_begin and adl_end are implemented in a separate
+        // class for gcc-2.9x
+        //
+        template<class IteratorT>
+        struct iterator_range_impl {
+            template< class ForwardRange >
+            static IteratorT adl_begin( ForwardRange& r )
+            {
+                return static_cast<IteratorT>( boost::begin( r ) );
+            }
+
+            template< class ForwardRange >
+            static IteratorT adl_end( ForwardRange& r )
+            {
+                return static_cast<IteratorT>( boost::end( r ) );
+            }
+        };
+
+        template< class Left, class Right >
+        inline bool less_than( const Left& l, const Right& r )
+        {
+            return std::lexicographical_compare( boost::begin(l),
+                                                 boost::end(l),
+                                                 boost::begin(r),
+                                                 boost::end(r) );
+        }
+        
+        template< class Left, class Right >
+        inline bool greater_than( const Left& l, const Right& r )
+        {
+            return less_than(r,l);
+        }
+        
+        template< class Left, class Right >
+        inline bool less_or_equal_than( const Left& l, const Right& r )
+        {
+            return !iterator_range_detail::less_than(r,l);
+        }
+        
+        template< class Left, class Right >
+        inline bool greater_or_equal_than( const Left& l, const Right& r )
+        {
+            return !iterator_range_detail::less_than(l,r);
+        }
+
+        // This version is maintained since it is used in other boost libraries
+        // such as Boost.Assign
+        template< class Left, class Right >
+        inline bool equal(const Left& l, const Right& r)
+        {
+            return boost::equal(l, r);
+        }
+
+        struct range_tag { };
+        struct const_range_tag { };
+    }
+
+//  iterator range template class -----------------------------------------//
+
+        //! iterator_range class
+        /*!
+            An \c iterator_range delimits a range in a sequence by beginning and ending iterators.
+            An iterator_range can be passed to an algorithm which requires a sequence as an input.
+            For example, the \c toupper() function may be used most frequently on strings,
+            but can also be used on iterator_ranges:
+
+            \code
+                boost::tolower( find( s, "UPPERCASE STRING" ) );
+            \endcode
+
+            Many algorithms working with sequences take a pair of iterators,
+            delimiting a working range, as an arguments. The \c iterator_range class is an
+            encapsulation of a range identified by a pair of iterators.
+            It provides a collection interface,
+            so it is possible to pass an instance to an algorithm requiring a collection as an input.
+        */
+        template<class IteratorT>
+        class iterator_range
+        {
+            typedef range_detail::safe_bool< IteratorT iterator_range<IteratorT>::* > safe_bool_t;
+        protected: // Used by sub_range
+            //! implementation class
+            typedef iterator_range_detail::iterator_range_impl<IteratorT> impl;
+        public:
+            //! this type
+            typedef iterator_range<IteratorT> type;
+            typedef BOOST_DEDUCED_TYPENAME safe_bool_t::unspecified_bool_type unspecified_bool_type;
+            //BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION(value_type);
+
+            //! Encapsulated value type
+            typedef BOOST_DEDUCED_TYPENAME
+                iterator_value<IteratorT>::type value_type;
+
+            //! Difference type
+            typedef BOOST_DEDUCED_TYPENAME
+                iterator_difference<IteratorT>::type difference_type;
+
+            //! Size type
+            typedef std::size_t size_type; // note: must be unsigned
+
+            //! This type
+            typedef iterator_range<IteratorT> this_type;
+
+            //! Reference type
+            //
+            // Needed because value-type is the same for
+            // const and non-const iterators
+            //
+            typedef BOOST_DEDUCED_TYPENAME
+                iterator_reference<IteratorT>::type reference;
+
+            //! const_iterator type
+            /*!
+                There is no distinction between const_iterator and iterator.
+                These typedefs are provides to fulfill container interface
+            */
+            typedef IteratorT const_iterator;
+            //! iterator type
+            typedef IteratorT iterator;
+
+        private: // for return value of operator()()
+            typedef BOOST_DEDUCED_TYPENAME
+                boost::mpl::if_< boost::mpl::or_< boost::is_abstract< value_type >, 
+                                                  boost::is_array< value_type > >,
+                                 reference, value_type >::type abstract_value_type;
+
+        public:
+            iterator_range() : m_Begin( iterator() ), m_End( iterator() )
+            { }
+
+            //! Constructor from a pair of iterators
+            template< class Iterator >
+            iterator_range( Iterator Begin, Iterator End ) :
+                m_Begin(Begin), m_End(End)
+            {}
+
+            //! Constructor from a Range
+            template< class Range >
+            iterator_range( const Range& r ) :
+                m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) )
+            {}
+
+            //! Constructor from a Range
+            template< class Range >
+            iterator_range( Range& r ) :
+                m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) )
+            {}
+
+            //! Constructor from a Range
+            template< class Range >
+            iterator_range( const Range& r, iterator_range_detail::const_range_tag ) :
+                m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) )
+            {}
+
+            //! Constructor from a Range
+            template< class Range >
+            iterator_range( Range& r, iterator_range_detail::range_tag ) :
+                m_Begin( impl::adl_begin( r ) ), m_End( impl::adl_end( r ) )
+            {}
+
+            #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+            this_type& operator=( const this_type& r )
+            {
+                m_Begin  = r.begin();
+                m_End    = r.end();
+                return *this;
+            }
+            #endif
+
+            template< class Iterator >
+            iterator_range& operator=( const iterator_range<Iterator>& r )
+            {
+                m_Begin  = r.begin();
+                m_End    = r.end();
+                return *this;
+            }
+
+            template< class ForwardRange >
+            iterator_range& operator=( ForwardRange& r )
+            {
+                m_Begin  = impl::adl_begin( r );
+                m_End    = impl::adl_end( r );
+                return *this;
+            }
+
+            template< class ForwardRange >
+            iterator_range& operator=( const ForwardRange& r )
+            {
+                m_Begin  = impl::adl_begin( r );
+                m_End    = impl::adl_end( r );
+                return *this;
+            }
+
+            IteratorT begin() const
+            {
+                return m_Begin;
+            }
+
+            IteratorT end() const
+            {
+                return m_End;
+            }
+
+            difference_type size() const
+            {
+                return m_End - m_Begin;
+            }
+
+            bool empty() const
+            {
+                return m_Begin == m_End;
+            }
+
+            operator unspecified_bool_type() const
+            {
+                return safe_bool_t::to_unspecified_bool(m_Begin != m_End, &iterator_range::m_Begin);
+            }
+
+            bool operator!() const
+            {
+                return empty();
+            }
+
+            bool equal( const iterator_range& r ) const
+            {
+                return m_Begin == r.m_Begin && m_End == r.m_End;
+            }
+
+
+#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+            bool operator==( const iterator_range& r ) const
+            {
+                return boost::equal( *this, r );
+            }
+
+            bool operator!=( const iterator_range& r ) const
+            {
+                return !operator==(r);
+            }
+
+           bool operator<( const iterator_range& r ) const
+           {
+               return iterator_range_detail::less_than( *this, r );
+           }
+           
+           bool operator>( const iterator_range& r ) const
+           {
+               return iterator_range_detail::greater_than( *this, r );
+           }
+           
+           bool operator<=( const iterator_range& r ) const
+           {
+               return iterator_range_detail::less_or_equal_than( *this, r );
+           }
+           
+           bool operator>=( const iterator_range& r ) const
+           {
+               return iterator_range_detail::greater_or_equal_than( *this, r );
+           }
+
+#endif
+
+        public: // convenience
+           reference front() const
+           {
+               BOOST_ASSERT( !empty() );
+               return *m_Begin;
+           }
+
+           reference back() const
+           {
+               BOOST_ASSERT( !empty() );
+               IteratorT last( m_End );
+               return *--last;
+           }
+
+           // pop_front() - added to model the SinglePassRangePrimitiveConcept
+           void pop_front()
+           {
+               BOOST_ASSERT( !empty() );
+               ++m_Begin;
+           }
+
+           // pop_back() - added to model the BidirectionalRangePrimitiveConcept
+           void pop_back()
+           {
+               BOOST_ASSERT( !empty() );
+               --m_End;
+           }
+
+           reference operator[]( difference_type at ) const
+           {
+               BOOST_ASSERT( at >= 0 && at < size() );
+               return m_Begin[at];
+           }
+
+           //
+           // When storing transform iterators, operator[]()
+           // fails because it returns by reference. Therefore
+           // operator()() is provided for these cases.
+           //
+           abstract_value_type operator()( difference_type at ) const
+           {
+               BOOST_ASSERT( at >= 0 && at < size() );
+               return m_Begin[at];
+           }
+
+           iterator_range& advance_begin( difference_type n )
+           {
+               std::advance( m_Begin, n );
+               return *this;
+           }
+
+           iterator_range& advance_end( difference_type n )
+           {
+               std::advance( m_End, n );
+               return *this;
+           }
+
+        private:
+            // begin and end iterators
+            IteratorT m_Begin;
+            IteratorT m_End;
+
+        protected:
+            //
+            // Allow subclasses an easy way to access the
+            // base type
+            //
+            typedef iterator_range iterator_range_;
+        };
+
+//  iterator range free-standing operators ---------------------------//
+
+        /////////////////////////////////////////////////////////////////////
+        // comparison operators
+        /////////////////////////////////////////////////////////////////////
+
+        template< class IteratorT, class ForwardRange >
+        inline bool operator==( const ForwardRange& l,
+                                const iterator_range<IteratorT>& r )
+        {
+            return boost::equal( l, r );
+        }
+
+        template< class IteratorT, class ForwardRange >
+        inline bool operator!=( const ForwardRange& l,
+                                const iterator_range<IteratorT>& r )
+        {
+            return !boost::equal( l, r );
+        }
+
+        template< class IteratorT, class ForwardRange >
+        inline bool operator<( const ForwardRange& l,
+                               const iterator_range<IteratorT>& r )
+        {
+            return iterator_range_detail::less_than( l, r );
+        }
+        
+        template< class IteratorT, class ForwardRange >
+        inline bool operator<=( const ForwardRange& l,
+                                const iterator_range<IteratorT>& r )
+        {
+            return iterator_range_detail::less_or_equal_than( l, r );
+        }
+        
+        template< class IteratorT, class ForwardRange >
+        inline bool operator>( const ForwardRange& l,
+                               const iterator_range<IteratorT>& r )
+        {
+            return iterator_range_detail::greater_than( l, r );
+        }
+        
+        template< class IteratorT, class ForwardRange >
+        inline bool operator>=( const ForwardRange& l,
+                                const iterator_range<IteratorT>& r )
+        {
+            return iterator_range_detail::greater_or_equal_than( l, r );
+        }
+
+#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+#else
+        template< class Iterator1T, class Iterator2T >
+        inline bool operator==( const iterator_range<Iterator1T>& l,
+                                const iterator_range<Iterator2T>& r )
+        {
+            return boost::equal( l, r );
+        }
+
+        template< class IteratorT, class ForwardRange >
+        inline bool operator==( const iterator_range<IteratorT>& l,
+                                const ForwardRange& r )
+        {
+            return boost::equal( l, r );
+        }
+
+
+        template< class Iterator1T, class Iterator2T >
+        inline bool operator!=( const iterator_range<Iterator1T>& l,
+                                const iterator_range<Iterator2T>& r )
+        {
+            return !boost::equal( l, r );
+        }
+
+        template< class IteratorT, class ForwardRange >
+        inline bool operator!=( const iterator_range<IteratorT>& l,
+                                const ForwardRange& r )
+        {
+            return !boost::equal( l, r );
+        }
+
+
+        template< class Iterator1T, class Iterator2T >
+        inline bool operator<( const iterator_range<Iterator1T>& l,
+                               const iterator_range<Iterator2T>& r )
+        {
+            return iterator_range_detail::less_than( l, r );
+        }
+
+        template< class IteratorT, class ForwardRange >
+        inline bool operator<( const iterator_range<IteratorT>& l,
+                               const ForwardRange& r )
+        {
+            return iterator_range_detail::less_than( l, r );
+        }
+        
+        template< class Iterator1T, class Iterator2T >
+        inline bool operator<=( const iterator_range<Iterator1T>& l,
+                                const iterator_range<Iterator2T>& r )
+        {
+            return iterator_range_detail::less_or_equal_than( l, r );
+        }
+        
+        template< class IteratorT, class ForwardRange >
+        inline bool operator<=( const iterator_range<IteratorT>& l,
+                                const ForwardRange& r )
+        {
+            return iterator_range_detail::less_or_equal_than( l, r );
+        }
+        
+        template< class Iterator1T, class Iterator2T >
+        inline bool operator>( const iterator_range<Iterator1T>& l,
+                               const iterator_range<Iterator2T>& r )
+        {
+            return iterator_range_detail::greater_than( l, r );
+        }
+        
+        template< class IteratorT, class ForwardRange >
+        inline bool operator>( const iterator_range<IteratorT>& l,
+                               const ForwardRange& r )
+        {
+            return iterator_range_detail::greater_than( l, r );
+        }
+        
+        template< class Iterator1T, class Iterator2T >
+        inline bool operator>=( const iterator_range<Iterator1T>& l,
+                                const iterator_range<Iterator2T>& r )
+        {
+            return iterator_range_detail::greater_or_equal_than( l, r );
+        }
+        
+        template< class IteratorT, class ForwardRange >
+        inline bool operator>=( const iterator_range<IteratorT>& l,
+                                const ForwardRange& r )
+        {
+            return iterator_range_detail::greater_or_equal_than( l, r );
+        }
+
+#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+//  iterator range utilities -----------------------------------------//
+
+        //! iterator_range construct helper
+        /*!
+            Construct an \c iterator_range from a pair of iterators
+
+            \param Begin A begin iterator
+            \param End An end iterator
+            \return iterator_range object
+        */
+        template< typename IteratorT >
+        inline iterator_range< IteratorT >
+        make_iterator_range( IteratorT Begin, IteratorT End )
+        {
+            return iterator_range<IteratorT>( Begin, End );
+        }
+
+#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+        template< typename Range >
+        inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<Range>::type >
+        make_iterator_range( Range& r )
+        {
+            return iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<Range>::type >
+                ( boost::begin( r ), boost::end( r ) );
+        }
+
+#else
+        //! iterator_range construct helper
+        /*!
+            Construct an \c iterator_range from a \c Range containing the begin
+            and end iterators.
+        */
+        template< class ForwardRange >
+        inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type >
+        make_iterator_range( ForwardRange& r )
+        {
+           return iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type >
+                ( r, iterator_range_detail::range_tag() );
+        }
+
+        template< class ForwardRange >
+        inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type >
+        make_iterator_range( const ForwardRange& r )
+        {
+           return iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type >
+                ( r, iterator_range_detail::const_range_tag() );
+        }
+
+#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+        namespace iterator_range_detail
+        {
+            template< class Range >
+            inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<Range>::type >
+            make_range_impl( Range& r,
+                             BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_begin,
+                             BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_end )
+            {
+                //
+                // Not worth the effort
+                //
+                //if( advance_begin == 0 && advance_end == 0 )
+                //    return make_iterator_range( r );
+                //
+
+                BOOST_DEDUCED_TYPENAME range_iterator<Range>::type
+                    new_begin = boost::begin( r ),
+                    new_end   = boost::end( r );
+                std::advance( new_begin, advance_begin );
+                std::advance( new_end, advance_end );
+                return make_iterator_range( new_begin, new_end );
+            }
+        }
+
+#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+        template< class Range >
+        inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<Range>::type >
+        make_iterator_range( Range& r,
+                    BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_begin,
+                    BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_end )
+        {
+            //BOOST_ASSERT( advance_begin - advance_end <= size(r) && "creating invalid range" );
+            return iterator_range_detail::make_range_impl( r, advance_begin, advance_end );
+        }
+
+#else
+
+        template< class Range >
+        inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<Range>::type >
+        make_iterator_range( Range& r,
+                    BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_begin,
+                    BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_end )
+        {
+            //BOOST_ASSERT( advance_begin - advance_end <= size(r) && "creating invalid range" );
+            return iterator_range_detail::make_range_impl( r, advance_begin, advance_end );
+        }
+
+        template< class Range >
+        inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type >
+        make_iterator_range( const Range& r,
+                    BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_begin,
+                    BOOST_DEDUCED_TYPENAME range_difference<Range>::type advance_end )
+        {
+            //BOOST_ASSERT( advance_begin - advance_end <= size(r) && "creating invalid range" );
+            return iterator_range_detail::make_range_impl( r, advance_begin, advance_end );
+        }
+
+#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
+
+        //! copy a range into a sequence
+        /*!
+            Construct a new sequence of the specified type from the elements
+            in the given range
+
+            \param Range An input range
+            \return New sequence
+        */
+        template< typename SeqT, typename Range >
+        inline SeqT copy_range( const Range& r )
+        {
+            return SeqT( boost::begin( r ), boost::end( r ) );
+        }
+
+} // namespace 'boost'
+
+#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1500))
+    #pragma warning( pop )
+#endif
+
+#endif
+