Sprout/sprout/numeric/fixed/iota.hpp
2013-03-31 15:14:10 +09:00

82 lines
2.7 KiB
C++

#ifndef SPROUT_NUMERIC_FIXED_IOTA_HPP
#define SPROUT_NUMERIC_FIXED_IOTA_HPP
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/container/traits.hpp>
#include <sprout/container/functions.hpp>
#include <sprout/container/indexes.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/iterator/counting_iterator.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
#include <sprout/pit/pit.hpp>
namespace sprout {
namespace fixed {
namespace detail {
template<typename Container, typename T, sprout::index_t... Indexes>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
iota_impl(
Container const& cont, sprout::index_tuple<Indexes...>,
T value,
typename sprout::container_traits<Container>::difference_type offset,
typename sprout::container_traits<Container>::size_type size
)
{
return sprout::remake<Container>(
cont,
sprout::size(cont),
(Indexes >= offset && Indexes < offset + size
? value + (Indexes - offset)
: *sprout::next(sprout::internal_begin(cont), Indexes)
)...
);
}
template<typename Container, typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::is_fixed_container<Container>::value,
typename sprout::fixed::result_of::algorithm<Container>::type
>::type
iota(Container const& cont, T value) {
return sprout::fixed::detail::iota_impl(
cont, sprout::container_indexes<Container>::make(),
value,
sprout::internal_begin_offset(cont),
sprout::size(cont)
);
}
template<typename Container, typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<
!sprout::is_fixed_container<Container>::value,
typename sprout::fixed::result_of::algorithm<Container>::type
>::type
iota(Container const& cont, T value) {
return sprout::remake<Container>(
cont, sprout::size(cont),
sprout::make_counting_iterator(value),
sprout::next(sprout::make_counting_iterator(value), sprout::size(cont))
);
}
} // namespace detail
//
// iota
//
template<typename Container, typename T>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
iota(Container const& cont, T value) {
return sprout::fixed::detail::iota(cont, value);
}
template<typename Container, typename T>
inline SPROUT_CONSTEXPR typename sprout::fixed::result_of::algorithm<Container>::type
iota(T value) {
return sprout::fixed::detail::iota(sprout::pit<Container>(), value);
}
} // namespace fixed
using sprout::fixed::iota;
} // namespace sprout
#endif // #ifndef SPROUT_NUMERIC_FIXED_IOTA_HPP