Chris@16: // Boost.Range library
Chris@16: //
Chris@16: //  Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. Use, modification and
Chris@16: //  distribution is subject to the Boost Software License, Version
Chris@16: //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // For more information, see http://www.boost.org/libs/range/
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_RANGE_ADAPTOR_INDIRECTED_HPP
Chris@16: #define BOOST_RANGE_ADAPTOR_INDIRECTED_HPP
Chris@16: 
Chris@16: #include <boost/range/iterator_range.hpp>
Chris@101: #include <boost/range/concepts.hpp>
Chris@16: #include <boost/iterator/indirect_iterator.hpp>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16:     namespace range_detail
Chris@16:     {
Chris@16:         template< class R >
Chris@16:         struct indirected_range :
Chris@16:             public boost::iterator_range<
Chris@16:                         boost::indirect_iterator<
Chris@16:                             BOOST_DEDUCED_TYPENAME range_iterator<R>::type
Chris@16:                         >
Chris@16:                     >
Chris@16:         {
Chris@16:         private:
Chris@16:             typedef boost::iterator_range<
Chris@16:                         boost::indirect_iterator<
Chris@16:                             BOOST_DEDUCED_TYPENAME range_iterator<R>::type
Chris@16:                         >
Chris@16:                     >
Chris@16:                 base;
Chris@16: 
Chris@16:         public:
Chris@16:             explicit indirected_range( R& r )
Chris@16:                 : base( r )
Chris@16:             { }
Chris@16:         };
Chris@16: 
Chris@16:         struct indirect_forwarder {};
Chris@16: 
Chris@101:         template< class SinglePassRange >
Chris@101:         inline indirected_range<SinglePassRange>
Chris@101:         operator|( SinglePassRange& r, indirect_forwarder )
Chris@16:         {
Chris@101:             BOOST_RANGE_CONCEPT_ASSERT((
Chris@101:                 SinglePassRangeConcept<SinglePassRange>));
Chris@101: 
Chris@101:             return indirected_range<SinglePassRange>( r );
Chris@16:         }
Chris@16: 
Chris@101:         template< class SinglePassRange >
Chris@101:         inline indirected_range<const SinglePassRange>
Chris@101:         operator|( const SinglePassRange& r, indirect_forwarder )
Chris@16:         {
Chris@101:             BOOST_RANGE_CONCEPT_ASSERT((
Chris@101:                 SinglePassRangeConcept<const SinglePassRange>));
Chris@101: 
Chris@101:             return indirected_range<const SinglePassRange>( r );
Chris@16:         }
Chris@16: 
Chris@16:     } // 'range_detail'
Chris@16: 
Chris@16:     using range_detail::indirected_range;
Chris@16: 
Chris@16:     namespace adaptors
Chris@16:     {
Chris@16:         namespace
Chris@16:         {
Chris@16:             const range_detail::indirect_forwarder indirected =
Chris@16:                                             range_detail::indirect_forwarder();
Chris@16:         }
Chris@16: 
Chris@101:         template<class SinglePassRange>
Chris@101:         inline indirected_range<SinglePassRange>
Chris@101:         indirect(SinglePassRange& rng)
Chris@16:         {
Chris@101:             BOOST_RANGE_CONCEPT_ASSERT((
Chris@101:                 SinglePassRangeConcept<SinglePassRange>));
Chris@101:             return indirected_range<SinglePassRange>(rng);
Chris@16:         }
Chris@16: 
Chris@101:         template<class SinglePassRange>
Chris@101:         inline indirected_range<const SinglePassRange>
Chris@101:         indirect(const SinglePassRange& rng)
Chris@16:         {
Chris@101:             BOOST_RANGE_CONCEPT_ASSERT((
Chris@101:                 SinglePassRangeConcept<const SinglePassRange>));
Chris@101: 
Chris@101:             return indirected_range<const SinglePassRange>(rng);
Chris@16:         }
Chris@16:     } // 'adaptors'
Chris@16: 
Chris@16: }
Chris@16: 
Chris@16: #endif