// 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_SLICED_HPP | |
#define BOOST_RANGE_ADAPTOR_SLICED_HPP | |
#include <boost/range/adaptor/argument_fwd.hpp> | |
#include <boost/range/size_type.hpp> | |
#include <boost/range/iterator_range.hpp> | |
namespace boost | |
{ | |
namespace adaptors | |
{ | |
struct sliced | |
{ | |
sliced(std::size_t t_, std::size_t u_) | |
: t(t_), u(u_) {} | |
std::size_t t; | |
std::size_t u; | |
}; | |
template< class RandomAccessRange > | |
class sliced_range : public boost::iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<RandomAccessRange>::type > | |
{ | |
typedef boost::iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<RandomAccessRange>::type > base_t; | |
public: | |
template<typename Rng, typename T, typename U> | |
sliced_range(Rng& rng, T t, U u) | |
: base_t(boost::make_iterator_range(rng, t, u - boost::size(rng))) | |
{ | |
} | |
}; | |
template< class RandomAccessRange > | |
inline sliced_range<RandomAccessRange> | |
slice( RandomAccessRange& rng, std::size_t t, std::size_t u ) | |
{ | |
BOOST_ASSERT( t <= u && "error in slice indices" ); | |
BOOST_ASSERT( static_cast<std::size_t>(boost::size(rng)) >= u && | |
"second slice index out of bounds" ); | |
return sliced_range<RandomAccessRange>(rng, t, u); | |
} | |
template< class RandomAccessRange > | |
inline iterator_range< BOOST_DEDUCED_TYPENAME range_iterator<const RandomAccessRange>::type > | |
slice( const RandomAccessRange& rng, std::size_t t, std::size_t u ) | |
{ | |
BOOST_ASSERT( t <= u && "error in slice indices" ); | |
BOOST_ASSERT( static_cast<std::size_t>(boost::size(rng)) >= u && | |
"second slice index out of bounds" ); | |
return sliced_range<const RandomAccessRange>(rng, t, u); | |
} | |
template< class RandomAccessRange > | |
inline sliced_range<RandomAccessRange> | |
operator|( RandomAccessRange& r, const sliced& f ) | |
{ | |
return sliced_range<RandomAccessRange>( r, f.t, f.u ); | |
} | |
template< class RandomAccessRange > | |
inline sliced_range<const RandomAccessRange> | |
operator|( const RandomAccessRange& r, const sliced& f ) | |
{ | |
return sliced_range<const RandomAccessRange>( r, f.t, f.u ); | |
} | |
} // namespace adaptors | |
using adaptors::sliced_range; | |
} // namespace boost | |
#endif |