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https://github.com/bolero-MURAKAMI/Sprout.git
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40 lines
1.5 KiB
C++
40 lines
1.5 KiB
C++
#ifndef SPROUT_ALGORITHM_FIT_UNFOLD_N_HPP
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#define SPROUT_ALGORITHM_FIT_UNFOLD_N_HPP
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#include <sprout/config.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/algorithm/fixed/unfold_n.hpp>
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#include <sprout/algorithm/fit/result_of.hpp>
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#include <sprout/sub_array.hpp>
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#include HDR_ALGORITHM_SSCRISK_CEL_OR_SPROUT
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namespace sprout {
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namespace fit {
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namespace detail {
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template<typename Container, typename Size, typename Generator, typename Init>
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inline SPROUT_CONSTEXPR typename sprout::fit::result_of::algorithm<Container>::type
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unfold_n_impl(
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Container const& cont, Size n, Generator const& gen, Init const& init,
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typename sprout::container_traits<Container>::difference_type offset
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)
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{
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return sprout::sub_copy(
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sprout::get_internal(sprout::fixed::unfold_n(cont, n, gen, init)),
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offset,
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offset + NS_SSCRISK_CEL_OR_SPROUT::min(n, sprout::size(cont))
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);
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}
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} // namespace detail
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//
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// unfold_n
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//
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template<typename Container, typename Size, typename Generator, typename Init>
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inline SPROUT_CONSTEXPR typename sprout::fit::result_of::algorithm<Container>::type
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unfold_n(Container const& cont, Size n, Generator const& gen, Init const& init) {
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return sprout::fit::detail::unfold_n_impl(cont, n, gen, init, sprout::internal_begin_offset(cont));
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}
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} // namespace fit
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_FIT_UNFOLD_N_HPP
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