mirror of
https://github.com/bolero-MURAKAMI/Sprout
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29 lines
1.2 KiB
C++
29 lines
1.2 KiB
C++
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#ifndef SPROUT_ALGORITHM_PARTITION_POINT_HPP
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#define SPROUT_ALGORITHM_PARTITION_POINT_HPP
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#include <sprout/config.hpp>
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#include <sprout/iterator/operation.hpp>
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#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
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namespace sprout {
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// Copyright (C) 2011 RiSK (sscrisk)
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namespace detail {
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template<typename ForwardIterator, typename Predicate>
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SPROUT_CONSTEXPR ForwardIterator partition_point_impl(ForwardIterator first, ForwardIterator last, Predicate pred, ForwardIterator mid) {
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return mid == last ? mid
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: pred(*mid) ? sprout::detail::partition_point_impl(mid + 1, last, pred, mid + 1 + NS_SSCRISK_CEL_OR_SPROUT::distance(mid + 1, last) / 2)
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: sprout::detail::partition_point_impl(first, mid, pred, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, mid) / 2)
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;
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}
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} // namespace detail
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// 25.3.13 Partitions
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template<typename ForwardIterator, typename Predicate>
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SPROUT_CONSTEXPR ForwardIterator partition_point(ForwardIterator first, ForwardIterator last, Predicate pred) {
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return sprout::detail::partition_point_impl(first, last, pred, first + NS_SSCRISK_CEL_OR_SPROUT::distance(first, last) / 2);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_PARTITION_POINT_HPP
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