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add adaptor piped, taken, dropped, window, offset, adapted_xxx

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bolero-MURAKAMI 2012-11-24 13:04:02 +09:00
parent 5c9a8153de
commit cc4ade67fd
47 changed files with 1349 additions and 76 deletions
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77
sprout/range/adaptor/dropped_end.hpp Normal file
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#ifndef SPROUT_RANGE_ADAPTOR_DROPPED_END_HPP
#define SPROUT_RANGE_ADAPTOR_DROPPED_END_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/iterator/next.hpp>
#include <sprout/range/range_container.hpp>
#include <sprout/type_traits/lvalue_reference.hpp>
#include <sprout/utility/lvalue_forward.hpp>
#include HDR_ALGORITHM_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace adaptors {
//
// drop_end_holder
//
template<typename Difference>
class drop_end_holder {
public:
typedef Difference difference_type;
private:
difference_type distance_;
public:
explicit SPROUT_CONSTEXPR drop_end_holder(difference_type distance)
: distance_(distance)
{}
SPROUT_CONSTEXPR difference_type const& distance() const {
return distance_;
}
};
//
// dropped_end_forwarder
//
class dropped_end_forwarder {
public:
template<typename Difference>
SPROUT_CONSTEXPR sprout::adaptors::drop_end_holder<Difference>
operator()(Difference distance) {
return sprout::adaptors::drop_end_holder<Difference>(distance);
}
};
//
// dropped_end
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::adaptors::dropped_end_forwarder dropped_end{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename Difference>
inline SPROUT_CONSTEXPR sprout::range::range_container<
typename sprout::container_traits<typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type>::iterator
>
operator|(Range&& lhs, sprout::adaptors::drop_end_holder<Difference> const& rhs) {
typedef typename sprout::container_traits<
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
>::difference_type difference_type;
return sprout::range::range_container<
typename sprout::container_traits<typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type>::iterator
>(
sprout::begin(sprout::lvalue_forward<Range>(lhs)),
sprout::next(
sprout::end(sprout::lvalue_forward<Range>(lhs)),
NS_SSCRISK_CEL_OR_SPROUT::max<difference_type>(rhs.distance(), -sprout::size(sprout::lvalue_forward<Range>(lhs)))
)
);
}
} // namespace adaptors
} // namespace sprout
#endif // #ifndef SPROUT_RANGE_ADAPTOR_DROPPED_END_HPP