// Boost.Range library | |
// | |
// Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. 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_ADAPTOR_REVERSED_HPP | |
#define BOOST_RANGE_ADAPTOR_REVERSED_HPP | |
#include <boost/range/iterator_range.hpp> | |
#include <boost/iterator/reverse_iterator.hpp> | |
namespace boost | |
{ | |
namespace range_detail | |
{ | |
template< class R > | |
struct reversed_range : | |
public boost::iterator_range< | |
boost::reverse_iterator< | |
BOOST_DEDUCED_TYPENAME range_iterator<R>::type | |
> | |
> | |
{ | |
private: | |
typedef boost::iterator_range< | |
boost::reverse_iterator< | |
BOOST_DEDUCED_TYPENAME range_iterator<R>::type | |
> | |
> | |
base; | |
public: | |
typedef boost::reverse_iterator<BOOST_DEDUCED_TYPENAME range_iterator<R>::type> iterator; | |
explicit reversed_range( R& r ) | |
: base( iterator(boost::end(r)), iterator(boost::begin(r)) ) | |
{ } | |
}; | |
struct reverse_forwarder {}; | |
template< class BidirectionalRng > | |
inline reversed_range<BidirectionalRng> | |
operator|( BidirectionalRng& r, reverse_forwarder ) | |
{ | |
return reversed_range<BidirectionalRng>( r ); | |
} | |
template< class BidirectionalRng > | |
inline reversed_range<const BidirectionalRng> | |
operator|( const BidirectionalRng& r, reverse_forwarder ) | |
{ | |
return reversed_range<const BidirectionalRng>( r ); | |
} | |
} // 'range_detail' | |
using range_detail::reversed_range; | |
namespace adaptors | |
{ | |
namespace | |
{ | |
const range_detail::reverse_forwarder reversed = | |
range_detail::reverse_forwarder(); | |
} | |
template<class BidirectionalRange> | |
inline reversed_range<BidirectionalRange> | |
reverse(BidirectionalRange& rng) | |
{ | |
return reversed_range<BidirectionalRange>(rng); | |
} | |
template<class BidirectionalRange> | |
inline reversed_range<const BidirectionalRange> | |
reverse(const BidirectionalRange& rng) | |
{ | |
return reversed_range<const BidirectionalRange>(rng); | |
} | |
} // 'adaptors' | |
} // 'boost' | |
#endif |