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+//  Boost string_algo library find_iterator.hpp header file  ---------------------------//
+
+//  Copyright Pavol Droba 2002-2004.
+//
+// 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/ for updates, documentation, and revision history.
+
+#ifndef BOOST_STRING_FIND_ITERATOR_HPP
+#define BOOST_STRING_FIND_ITERATOR_HPP
+
+#include <boost/algorithm/string/config.hpp>
+#include <boost/iterator/iterator_facade.hpp>
+#include <boost/iterator/iterator_categories.hpp>
+
+#include <boost/range/iterator_range.hpp>
+#include <boost/range/begin.hpp>
+#include <boost/range/end.hpp>
+#include <boost/range/iterator.hpp>
+#include <boost/range/as_literal.hpp>
+
+#include <boost/algorithm/string/detail/find_iterator.hpp>
+
+/*! \file
+    Defines find iterator classes. Find iterator repeatedly applies a Finder
+    to the specified input string to search for matches. Dereferencing
+    the iterator yields the current match or a range between the last and the current
+    match depending on the iterator used.
+*/
+
+namespace boost {
+    namespace algorithm { 
+
+//  find_iterator -----------------------------------------------//
+
+        //! find_iterator
+        /*!    
+            Find iterator encapsulates a Finder and allows
+            for incremental searching in a string.
+            Each increment moves the iterator to the next match.
+
+            Find iterator is a readable forward traversal iterator.
+
+            Dereferencing the iterator yields an iterator_range delimiting
+            the current match.
+        */
+        template<typename IteratorT>
+        class find_iterator : 
+            public iterator_facade<
+                find_iterator<IteratorT>,
+                const iterator_range<IteratorT>,
+                forward_traversal_tag >,
+            private detail::find_iterator_base<IteratorT>
+        {
+        private:
+            // facade support
+            friend class ::boost::iterator_core_access;
+
+        private:
+        // typedefs
+
+            typedef detail::find_iterator_base<IteratorT> base_type;
+            typedef BOOST_STRING_TYPENAME 
+                base_type::input_iterator_type input_iterator_type;
+            typedef BOOST_STRING_TYPENAME 
+                base_type::match_type match_type;
+
+        public:
+            //! Default constructor
+            /*!
+                Construct null iterator. All null iterators are equal.
+
+                \post eof()==true
+            */
+            find_iterator() {}
+
+            //! Copy constructor
+            /*!
+                Construct a copy of the find_iterator
+            */
+            find_iterator( const find_iterator& Other ) :
+                base_type(Other),
+                m_Match(Other.m_Match),
+                m_End(Other.m_End) {}
+
+            //! Constructor
+            /*!
+                Construct new find_iterator for a given finder
+                and a range.
+            */
+            template<typename FinderT>
+            find_iterator(
+                    IteratorT Begin,
+                    IteratorT End,
+                    FinderT Finder ) :
+                detail::find_iterator_base<IteratorT>(Finder,0),
+                m_Match(Begin,Begin),
+                m_End(End)
+            {
+                increment();
+            }
+
+            //! Constructor
+            /*!
+                Construct new find_iterator for a given finder
+                and a range.
+            */
+            template<typename FinderT, typename RangeT>
+            find_iterator(
+                    RangeT& Col,
+                    FinderT Finder ) :
+                detail::find_iterator_base<IteratorT>(Finder,0)
+            {
+                iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_col(::boost::as_literal(Col));
+                m_Match=::boost::make_iterator_range(::boost::begin(lit_col), ::boost::begin(lit_col));
+                m_End=::boost::end(lit_col);
+
+                increment();
+            }
+
+        private:
+        // iterator operations
+
+            // dereference
+            const match_type& dereference() const
+            {
+                return m_Match;
+            }
+
+            // increment
+            void increment()
+            {
+                m_Match=this->do_find(m_Match.end(),m_End);
+            }
+
+            // comparison
+            bool equal( const find_iterator& Other ) const
+            {
+                bool bEof=eof();
+                bool bOtherEof=Other.eof();
+
+                return bEof || bOtherEof ? bEof==bOtherEof :
+                    (
+                        m_Match==Other.m_Match &&
+                        m_End==Other.m_End 
+                    );
+            }
+
+        public:
+        // operations
+
+            //! Eof check
+            /*!
+                Check the eof condition. Eof condition means that
+                there is nothing more to be searched i.e. find_iterator
+                is after the last match.
+            */
+            bool eof() const
+            {
+                return 
+                    this->is_null() || 
+                    ( 
+                        m_Match.begin() == m_End &&
+                        m_Match.end() == m_End
+                    );
+            }
+
+        private:
+        // Attributes
+            match_type m_Match;
+            input_iterator_type m_End;
+        };
+
+        //! find iterator construction helper
+        /*!
+         *    Construct a find iterator to iterate through the specified string
+         */
+        template<typename RangeT, typename FinderT>
+        inline find_iterator< 
+            BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
+        make_find_iterator(
+            RangeT& Collection,
+            FinderT Finder)
+        {
+            return find_iterator<BOOST_STRING_TYPENAME range_iterator<RangeT>::type>(
+                Collection, Finder);
+        }
+
+//  split iterator -----------------------------------------------//
+
+        //! split_iterator
+        /*!    
+            Split iterator encapsulates a Finder and allows
+            for incremental searching in a string.
+            Unlike the find iterator, split iterator iterates
+            through gaps between matches.
+
+            Find iterator is a readable forward traversal iterator.
+
+            Dereferencing the iterator yields an iterator_range delimiting
+            the current match.
+        */
+        template<typename IteratorT>
+        class split_iterator : 
+            public iterator_facade<
+                split_iterator<IteratorT>,
+                const iterator_range<IteratorT>,
+                forward_traversal_tag >,
+            private detail::find_iterator_base<IteratorT>
+        {
+        private:
+            // facade support
+            friend class ::boost::iterator_core_access;
+
+        private:
+        // typedefs
+
+            typedef detail::find_iterator_base<IteratorT> base_type;
+            typedef BOOST_STRING_TYPENAME 
+                base_type::input_iterator_type input_iterator_type;
+            typedef BOOST_STRING_TYPENAME 
+                base_type::match_type match_type;
+
+        public:
+            //! Default constructor
+            /*!
+                Construct null iterator. All null iterators are equal.
+    
+                \post eof()==true
+            */
+            split_iterator() {}
+            //! Copy constructor
+            /*!
+                Construct a copy of the split_iterator
+            */
+            split_iterator( const split_iterator& Other ) :
+                base_type(Other),
+                m_Match(Other.m_Match),
+                m_Next(Other.m_Next),
+                m_End(Other.m_End),
+                m_bEof(Other.m_bEof)
+            {}
+
+            //! Constructor
+            /*!
+                Construct new split_iterator for a given finder
+                and a range.
+            */
+            template<typename FinderT>
+            split_iterator(
+                    IteratorT Begin,
+                    IteratorT End,
+                    FinderT Finder ) :
+                detail::find_iterator_base<IteratorT>(Finder,0),
+                m_Match(Begin,Begin),
+                m_Next(Begin),
+                m_End(End),
+                m_bEof(false)
+            {
+                increment();
+            }
+            //! Constructor
+            /*!
+                Construct new split_iterator for a given finder
+                and a collection.
+            */
+            template<typename FinderT, typename RangeT>
+            split_iterator(
+                    RangeT& Col,
+                    FinderT Finder ) :
+                detail::find_iterator_base<IteratorT>(Finder,0),
+                m_bEof(false)
+            {
+                iterator_range<BOOST_STRING_TYPENAME range_iterator<RangeT>::type> lit_col(::boost::as_literal(Col));
+                m_Match=make_iterator_range(::boost::begin(lit_col), ::boost::begin(lit_col));
+                m_Next=::boost::begin(lit_col);
+                m_End=::boost::end(lit_col);
+
+                increment();
+            }
+
+
+        private:
+        // iterator operations
+
+            // dereference
+            const match_type& dereference() const
+            {
+                return m_Match;
+            }
+
+            // increment
+            void increment()
+            {
+                match_type FindMatch=this->do_find( m_Next, m_End );
+
+                if(FindMatch.begin()==m_End && FindMatch.end()==m_End)
+                {
+                    if(m_Match.end()==m_End)
+                    {
+                        // Mark iterator as eof
+                        m_bEof=true;
+                    }
+                }
+
+                m_Match=match_type( m_Next, FindMatch.begin() );
+                m_Next=FindMatch.end();
+            }
+
+            // comparison
+            bool equal( const split_iterator& Other ) const
+            {
+                bool bEof=eof();
+                bool bOtherEof=Other.eof();
+
+                return bEof || bOtherEof ? bEof==bOtherEof :
+                    (
+                        m_Match==Other.m_Match &&
+                        m_Next==Other.m_Next &&
+                        m_End==Other.m_End
+                    );
+            }
+
+        public:
+        // operations
+
+            //! Eof check
+            /*!
+                Check the eof condition. Eof condition means that
+                there is nothing more to be searched i.e. find_iterator
+                is after the last match.
+            */
+            bool eof() const
+            {
+                return this->is_null() || m_bEof;
+            }
+
+        private:
+        // Attributes
+            match_type m_Match;
+            input_iterator_type m_Next;
+            input_iterator_type m_End;
+            bool m_bEof;
+        };
+
+        //! split iterator construction helper
+        /*!
+         *    Construct a split iterator to iterate through the specified collection
+         */
+        template<typename RangeT, typename FinderT>
+        inline split_iterator< 
+            BOOST_STRING_TYPENAME range_iterator<RangeT>::type>
+        make_split_iterator(
+            RangeT& Collection,
+            FinderT Finder)
+        {
+            return split_iterator<BOOST_STRING_TYPENAME range_iterator<RangeT>::type>(
+                Collection, Finder);
+        }
+
+
+    } // namespace algorithm
+
+    // pull names to the boost namespace
+    using algorithm::find_iterator;
+    using algorithm::make_find_iterator;
+    using algorithm::split_iterator;
+    using algorithm::make_split_iterator;
+
+} // namespace boost
+
+
+#endif  // BOOST_STRING_FIND_ITERATOR_HPP