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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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129
sprout/range/adaptor/piped.hpp Normal file
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#ifndef SPROUT_RANGE_ADAPTOR_PIPED_HPP
#define SPROUT_RANGE_ADAPTOR_PIPED_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/lvalue_forward.hpp>
#include <sprout/tuple/tuple.hpp>
namespace sprout {
namespace adaptors {
namespace detail {
template<typename Range>
inline SPROUT_CONSTEXPR auto
apply_adaptors_impl(Range&& range)
-> decltype(sprout::forward<Range>(range))
{
return sprout::forward<Range>(range);
}
template<typename Range, typename Adaptor>
inline SPROUT_CONSTEXPR auto
apply_adaptors_impl(Range&& range, Adaptor const& adaptor)
-> decltype(sprout::forward<Range>(range) | adaptor)
{
return sprout::forward<Range>(range) | adaptor;
}
template<typename Range, typename Adaptor, typename... Tail>
inline SPROUT_CONSTEXPR auto
apply_adaptors_impl(Range&& range, Adaptor const& adaptor, Tail const&... tail)
-> decltype(sprout::adaptors::detail::apply_adaptors_impl(sprout::forward<Range>(range) | adaptor, tail...))
{
return sprout::adaptors::detail::apply_adaptors_impl(sprout::forward<Range>(range) | adaptor, tail...);
}
} // namespace detail
//
// apply_adaptors
//
template<typename Range, typename... Adaptors>
SPROUT_CONSTEXPR auto
apply_adaptors(Range&& range, Adaptors const&... adaptors)
-> decltype(sprout::adaptors::detail::apply_adaptors_impl(sprout::forward<Range>(range), adaptors...))
{
return sprout::adaptors::detail::apply_adaptors_impl(sprout::forward<Range>(range), adaptors...);
}
namespace detail {
template<typename Range, typename AdaptorsTuple, sprout::index_t... Indexes>
SPROUT_CONSTEXPR auto
apply_adaptors_tuple_impl(Range&& range, AdaptorsTuple const& adaptors, sprout::index_tuple<Indexes...>)
-> decltype(sprout::adaptors::apply_adaptors(sprout::forward<Range>(range), sprout::tuples::get<Indexes>(adaptors)...))
{
return sprout::adaptors::apply_adaptors(sprout::forward<Range>(range), sprout::tuples::get<Indexes>(adaptors)...);
}
template<typename Range, typename AdaptorsTuple>
SPROUT_CONSTEXPR auto
apply_adaptors_tuple(Range&& range, AdaptorsTuple const& adaptors)
-> decltype(
sprout::adaptors::detail::apply_adaptors_tuple_impl(
sprout::forward<Range>(range), adaptors,
sprout::index_range<0, sprout::tuples::tuple_size<AdaptorsTuple>::value>::make()
)
)
{
return sprout::adaptors::detail::apply_adaptors_tuple_impl(
sprout::forward<Range>(range), adaptors,
sprout::index_range<0, sprout::tuples::tuple_size<AdaptorsTuple>::value>::make()
);
}
} // namespace detail
//
// pipe_holder
//
template<typename... Adaptors>
class pipe_holder {
public:
typedef sprout::tuples::tuple<Adaptors...> adaptors_type;
private:
adaptors_type adaptors_;
public:
explicit SPROUT_CONSTEXPR pipe_holder(Adaptors const&... adaptors)
: adaptors_(adaptors...)
{}
SPROUT_CONSTEXPR adaptors_type const& adaptors() const {
return adaptors_;
}
template<typename Range>
SPROUT_CONSTEXPR auto
apply(Range&& range) const
-> decltype(sprout::adaptors::detail::apply_adaptors_tuple(sprout::forward<Range>(range), adaptors_))
{
return sprout::adaptors::detail::apply_adaptors_tuple(sprout::forward<Range>(range), adaptors_);
}
};
//
// piped_forwarder
//
class piped_forwarder {
public:
template<typename... Adaptors>
SPROUT_CONSTEXPR sprout::adaptors::pipe_holder<Adaptors...>
operator()(Adaptors const&... adaptors) {
return sprout::adaptors::pipe_holder<Adaptors...>(adaptors...);
}
};
//
// piped
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::adaptors::piped_forwarder piped{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename... Adaptors>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, sprout::adaptors::pipe_holder<Adaptors...> const& rhs)
-> decltype(rhs.apply(sprout::lvalue_forward<Range>(lhs)))
{
return rhs.apply(sprout::lvalue_forward<Range>(lhs));
}
} // namespace adaptors
} // namespace sprout
#endif // #ifndef SPROUT_RANGE_ADAPTOR_PIPED_HPP