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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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122
sprout/range/adaptor/window.hpp Normal file
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#ifndef SPROUT_RANGE_ADAPTOR_WINDOW_HPP
#define SPROUT_RANGE_ADAPTOR_WINDOW_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/type_traits/arithmetic_promote.hpp>
#include <sprout/utility/lvalue_forward.hpp>
#include HDR_ALGORITHM_SSCRISK_CEL_OR_SPROUT
namespace sprout {
namespace adaptors {
//
// window_holder
//
template<typename Difference1, typename Difference2 = void>
class window_holder {
public:
typedef typename sprout::arithmetic_promote<Difference1, Difference2>::type difference_type;
private:
difference_type to_first_;
difference_type to_last_;
public:
SPROUT_CONSTEXPR window_holder(difference_type to_first, difference_type to_last)
: to_first_(to_first), to_last_(to_last)
{}
SPROUT_CONSTEXPR difference_type const& to_first() const {
return to_first_;
}
SPROUT_CONSTEXPR difference_type const& to_last() const {
return to_last_;
}
};
template<typename Difference>
class window_holder<Difference, void> {
public:
typedef Difference difference_type;
private:
difference_type to_first_;
public:
explicit SPROUT_CONSTEXPR window_holder(difference_type to_first)
: to_first_(to_first)
{}
SPROUT_CONSTEXPR difference_type const& to_first() const {
return to_first_;
}
};
//
// window_forwarder
//
class window_forwarder {
public:
template<typename Difference1, typename Difference2>
SPROUT_CONSTEXPR sprout::adaptors::window_holder<Difference1, Difference2>
operator()(Difference1 to_first, Difference2 to_last) {
return sprout::adaptors::window_holder<Difference1, Difference2>(to_first, to_last);
}
template<typename Difference>
SPROUT_CONSTEXPR sprout::adaptors::window_holder<Difference>
operator()(Difference to_first) {
return sprout::adaptors::window_holder<Difference>(to_first);
}
};
//
// window
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::adaptors::window_forwarder window{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename Difference1, typename Difference2>
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::window_holder<Difference1, Difference2> 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::next(
sprout::begin(sprout::lvalue_forward<Range>(lhs)),
NS_SSCRISK_CEL_OR_SPROUT::min<difference_type>(rhs.to_first(), sprout::size(sprout::lvalue_forward<Range>(lhs)))
),
sprout::next(
sprout::begin(sprout::lvalue_forward<Range>(lhs)),
NS_SSCRISK_CEL_OR_SPROUT::min<difference_type>(rhs.to_last(), sprout::size(sprout::lvalue_forward<Range>(lhs)))
)
);
}
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::window_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::next(
sprout::begin(sprout::lvalue_forward<Range>(lhs)),
NS_SSCRISK_CEL_OR_SPROUT::min<difference_type>(rhs.to_first(), sprout::size(sprout::lvalue_forward<Range>(lhs)))
),
sprout::end(sprout::lvalue_forward<Range>(lhs))
);
}
} // namespace adaptors
} // namespace sprout
#endif // #ifndef SPROUT_RANGE_ADAPTOR_WINDOW_HPP