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90 lines
2.7 KiB
90 lines
2.7 KiB
// Boost.Range library |
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// |
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// Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. Use, modification and |
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// distribution is subject to the Boost Software License, Version |
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// For more information, see http://www.boost.org/libs/range/ |
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// |
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#ifndef BOOST_RANGE_ADAPTOR_REVERSED_HPP |
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#define BOOST_RANGE_ADAPTOR_REVERSED_HPP |
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#include <boost/range/iterator_range.hpp> |
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#include <boost/iterator/reverse_iterator.hpp> |
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namespace boost |
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{ |
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namespace range_detail |
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{ |
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template< class R > |
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struct reversed_range : |
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public boost::iterator_range< |
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boost::reverse_iterator< |
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BOOST_DEDUCED_TYPENAME range_iterator<R>::type |
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> |
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> |
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{ |
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private: |
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typedef boost::iterator_range< |
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boost::reverse_iterator< |
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BOOST_DEDUCED_TYPENAME range_iterator<R>::type |
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> |
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> |
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base; |
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public: |
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typedef boost::reverse_iterator<BOOST_DEDUCED_TYPENAME range_iterator<R>::type> iterator; |
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explicit reversed_range( R& r ) |
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: base( iterator(boost::end(r)), iterator(boost::begin(r)) ) |
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{ } |
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}; |
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struct reverse_forwarder {}; |
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template< class BidirectionalRng > |
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inline reversed_range<BidirectionalRng> |
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operator|( BidirectionalRng& r, reverse_forwarder ) |
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{ |
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return reversed_range<BidirectionalRng>( r ); |
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} |
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template< class BidirectionalRng > |
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inline reversed_range<const BidirectionalRng> |
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operator|( const BidirectionalRng& r, reverse_forwarder ) |
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{ |
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return reversed_range<const BidirectionalRng>( r ); |
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} |
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} // 'range_detail' |
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using range_detail::reversed_range; |
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namespace adaptors |
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{ |
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namespace |
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{ |
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const range_detail::reverse_forwarder reversed = |
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range_detail::reverse_forwarder(); |
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} |
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template<class BidirectionalRange> |
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inline reversed_range<BidirectionalRange> |
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reverse(BidirectionalRange& rng) |
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{ |
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return reversed_range<BidirectionalRange>(rng); |
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} |
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template<class BidirectionalRange> |
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inline reversed_range<const BidirectionalRange> |
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reverse(const BidirectionalRange& rng) |
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{ |
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return reversed_range<const BidirectionalRange>(rng); |
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} |
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} // 'adaptors' |
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} // 'boost' |
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#endif
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