Sprout/sprout/numeric/fixed/iota.hpp
2012-02-28 10:46:39 +09:00

55 lines
1.6 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/fixed_container/traits.hpp>
#include <sprout/fixed_container/functions.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/algorithm/fixed/result_of.hpp>
namespace sprout {
namespace fixed {
namespace detail {
template<typename Container, typename T, sprout::index_t... Indexes>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type iota_impl(
Container const& cont,
sprout::index_tuple<Indexes...>,
T value,
typename sprout::fixed_container_traits<Container>::difference_type offset,
typename sprout::fixed_container_traits<Container>::size_type size
)
{
return sprout::remake_clone<Container>(
cont,
sprout::size(cont),
(Indexes >= offset && Indexes < offset + size
? value + (Indexes - offset)
: *sprout::next(sprout::fixed_begin(cont), Indexes)
)...
);
}
} // namespace detail
//
// iota
//
template<typename Container, typename T>
SPROUT_CONSTEXPR inline typename sprout::fixed::result_of::algorithm<Container>::type iota(
Container const& cont,
T value
)
{
return sprout::fixed::detail::iota_impl(
cont,
typename sprout::index_range<0, sprout::fixed_container_traits<Container>::fixed_size>::type(),
value,
sprout::fixed_begin_offset(cont),
sprout::size(cont)
);
}
} // namespace fixed
using sprout::fixed::iota;
} // namespace sprout
#endif // #ifndef SPROUT_NUMERIC_FIXED_IOTA_HPP