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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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116
sprout/range/adaptor/adapted_offset.hpp Normal file
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#ifndef SPROUT_RANGE_ADAPTOR_ADAPTED_OFFSET_HPP
#define SPROUT_RANGE_ADAPTOR_ADAPTED_OFFSET_HPP
#include <sprout/config.hpp>
#include <sprout/type_traits/arithmetic_promote.hpp>
#include <sprout/utility/lvalue_forward.hpp>
#include <sprout/range/adaptor/taken.hpp>
#include <sprout/range/adaptor/taken_end.hpp>
#include <sprout/range/adaptor/offset.hpp>
#include <sprout/range/adaptor/jointed.hpp>
namespace sprout {
namespace adaptors {
//
// adapt_offset_holder
//
template<typename Adaptor, typename Difference1, typename Difference2 = void>
class adapt_offset_holder {
public:
typedef Adaptor adaptor_type;
typedef typename sprout::arithmetic_promote<Difference1, Difference2>::type difference_type;
private:
adaptor_type adaptor_;
difference_type from_begin_;
difference_type from_end_;
public:
explicit SPROUT_CONSTEXPR adapt_offset_holder(adaptor_type const& adaptor, difference_type from_begin, difference_type from_end)
: adaptor_(adaptor), from_begin_(from_begin), from_end_(from_end)
{}
SPROUT_CONSTEXPR adaptor_type const& adaptor() const {
return adaptor_;
}
SPROUT_CONSTEXPR difference_type const& from_begin() const {
return from_begin_;
}
SPROUT_CONSTEXPR difference_type const& from_end() const {
return from_end_;
}
};
template<typename Adaptor, typename Difference>
class adapt_offset_holder<Adaptor, Difference, void> {
public:
typedef Adaptor adaptor_type;
typedef Difference difference_type;
private:
adaptor_type adaptor_;
difference_type from_begin_;
public:
explicit SPROUT_CONSTEXPR adapt_offset_holder(adaptor_type const& adaptor, difference_type from_begin)
: adaptor_(adaptor), from_begin_(from_begin)
{}
SPROUT_CONSTEXPR adaptor_type const& adaptor() const {
return adaptor_;
}
SPROUT_CONSTEXPR difference_type const& from_begin() const {
return from_begin_;
}
};
//
// adapt_offset_forwarder
//
class adapt_offset_forwarder {
public:
template<typename Adaptor, typename Difference1, typename Difference2>
SPROUT_CONSTEXPR sprout::adaptors::adapt_offset_holder<Adaptor, Difference1, Difference2>
operator()(Adaptor const& adaptor, Difference1 from_begin, Difference2 from_end) {
return sprout::adaptors::adapt_offset_holder<Adaptor, Difference1, Difference2>(adaptor, from_begin, from_end);
}
template<typename Adaptor, typename Difference>
SPROUT_CONSTEXPR sprout::adaptors::adapt_offset_holder<Adaptor, Difference>
operator()(Adaptor const& adaptor, Difference from_begin) {
return sprout::adaptors::adapt_offset_holder<Adaptor, Difference>(adaptor, from_begin);
}
};
//
// adapt_offset
//
namespace {
SPROUT_STATIC_CONSTEXPR sprout::adaptors::adapt_offset_forwarder adapt_offset{};
} // anonymous-namespace
//
// operator|
//
template<typename Range, typename Adaptor, typename Difference1, typename Difference2>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, sprout::adaptors::adapt_offset_holder<Adaptor, Difference1, Difference2> const& rhs)
-> decltype(
sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::taken(rhs.from_begin())
| sprout::adaptors::jointed(sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::offset(rhs.from_begin(), rhs.from_end()) | rhs.adaptor())
| sprout::adaptors::jointed(sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::taken_end(rhs.from_end()))
)
{
return sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::taken(rhs.from_begin())
| sprout::adaptors::jointed(sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::offset(rhs.from_begin(), rhs.from_end()) | rhs.adaptor())
| sprout::adaptors::jointed(sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::taken_end(rhs.from_end()))
;
}
template<typename Range, typename Adaptor, typename Difference>
inline SPROUT_CONSTEXPR auto
operator|(Range&& lhs, sprout::adaptors::adapt_offset_holder<Adaptor, Difference> const& rhs)
-> decltype(
sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::taken(rhs.from_begin())
| sprout::adaptors::jointed(sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::offset(rhs.from_begin()) | rhs.adaptor())
)
{
return sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::taken(rhs.from_begin())
| sprout::adaptors::jointed(sprout::lvalue_forward<Range>(lhs) | sprout::adaptors::offset(rhs.from_begin()) | rhs.adaptor())
;
}
} // namespace adaptors
} // namespace sprout
#endif // #ifndef SPROUT_RANGE_ADAPTOR_ADAPTED_OFFSET_HPP