range/adaptor/copied.hpp

0001 // Boost.Range library
0002 //
0003 //  Copyright Thorsten Ottosen, Neil Groves 2006. Use, modification and
0004 //  distribution is subject to the Boost Software License, Version
0005 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // For more information, see http://www.boost.org/libs/range/
0009 //
0010
0011 #ifndef BOOST_RANGE_ADAPTOR_COPIED_HPP
0012 #define BOOST_RANGE_ADAPTOR_COPIED_HPP
0013
0014 #include <boost/range/adaptor/argument_fwd.hpp>
0015 #include <boost/range/adaptor/sliced.hpp>
0016 #include <boost/range/size_type.hpp>
0017 #include <boost/range/iterator_range.hpp>
0018 #include <boost/range/concepts.hpp>
0019
0020 namespace boost
0021 {
0022     namespace adaptors
0023     {
0024         struct copied
0025         {
0026             copied(std::size_t t_, std::size_t u_)
0027                 : t(t_), u(u_) {}
0028
0029             std::size_t t;
0030             std::size_t u;
0031         };
0032
0033         template<class CopyableRandomAccessRange>
0034         inline CopyableRandomAccessRange
0035         operator|(const CopyableRandomAccessRange& r, const copied& f)
0036         {
0037             BOOST_RANGE_CONCEPT_ASSERT((
0038                 RandomAccessRangeConcept<const CopyableRandomAccessRange>));
0039
0040             iterator_range<
0041                 BOOST_DEDUCED_TYPENAME range_iterator<
0042                     const CopyableRandomAccessRange
0043                 >::type
0044             > temp(adaptors::slice(r, f.t, f.u));
0045
0046             return CopyableRandomAccessRange(temp.begin(), temp.end());
0047         }
0048
0049         template<class CopyableRandomAccessRange>
0050         inline CopyableRandomAccessRange
0051         copy(const CopyableRandomAccessRange& rng, std::size_t t, std::size_t u)
0052         {
0053             BOOST_RANGE_CONCEPT_ASSERT((
0054                 RandomAccessRangeConcept<const CopyableRandomAccessRange>));
0055
0056             iterator_range<
0057                 BOOST_DEDUCED_TYPENAME range_iterator<
0058                     const CopyableRandomAccessRange
0059                 >::type
0060             > temp(adaptors::slice(rng, t, u));
0061
0062             return CopyableRandomAccessRange( temp.begin(), temp.end() );
0063         }
0064     } // 'adaptors'
0065
0066 }
0067
0068 #endif // include guard