Sprout/sprout/range/adaptor/dft.hpp
2015-01-10 19:13:57 +09:00

88 lines
2.7 KiB
C++

/*=============================================================================
Copyright (c) 2011-2015 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under 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)
=============================================================================*/
#ifndef SPROUT_RANGE_ADAPTOR_DFT_HPP
#define SPROUT_RANGE_ADAPTOR_DFT_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/iterator/dft_iterator.hpp>
#include <sprout/range/adaptor/detail/adapted_range_default.hpp>
#include <sprout/type_traits/lvalue_reference.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/lvalue_forward.hpp>
namespace sprout {
namespace adaptors {
//
// dft_range
//
template<typename Range>
class dft_range
: public sprout::adaptors::detail::adapted_range_default<
Range,
sprout::dft_iterator<typename sprout::container_traits<Range>::iterator>
>
{
public:
typedef sprout::adaptors::detail::adapted_range_default<
Range,
sprout::dft_iterator<typename sprout::container_traits<Range>::iterator>
> base_type;
typedef typename base_type::range_type range_type;
typedef typename base_type::iterator iterator;
public:
SPROUT_CONSTEXPR dft_range() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
dft_range(dft_range const&) = default;
explicit SPROUT_CONSTEXPR dft_range(range_type& range)
: base_type(
iterator(sprout::begin(range), sprout::end(range)),
iterator(sprout::begin(range), sprout::end(range), sprout::size(range))
)
{}
};
//
// dft_forwarder
//
class dft_forwarder {};
//
// dft
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::adaptors::dft_forwarder dft = {};
} // anonymous-namespace
//
// operator|
//
template<typename Range>
inline SPROUT_CONSTEXPR sprout::adaptors::dft_range<
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
>
operator|(Range&& lhs, sprout::adaptors::dft_forwarder) {
return sprout::adaptors::dft_range<
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
>(
sprout::lvalue_forward<Range>(lhs)
);
}
} // namespace adaptors
//
// container_construct_traits
//
template<typename Range>
struct container_construct_traits<sprout::adaptors::dft_range<Range> >
: public sprout::container_construct_traits<typename sprout::adaptors::dft_range<Range>::base_type>
{};
} // namespace sprout
#endif // #ifndef SPROUT_RANGE_ADAPTOR_DFT_HPP