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https://github.com/bolero-MURAKAMI/Sprout.git
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44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
#ifndef SPROUT_DETAIL_ALGORITHM_SET_OVERLAP_COUNT_HPP
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#define SPROUT_DETAIL_ALGORITHM_SET_OVERLAP_COUNT_HPP
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#include <iterator>
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#include <sprout/config.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/functional/less.hpp>
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namespace sprout {
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namespace detail {
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//
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// set_overlap_count
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//
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template<typename InputIterator1, typename InputIterator2, typename Compare>
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inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator1>::difference_type
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set_overlap_count(
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InputIterator1 first1, InputIterator1 last1,
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InputIterator2 first2, InputIterator2 last2,
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Compare comp
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)
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{
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return first1 != last1 && first2 != last2
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? comp(*first1, *first2)
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? sprout::detail::set_overlap_count(sprout::next(first1), last1, first2, last2, comp)
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: comp(*first2, *first1)
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? sprout::detail::set_overlap_count(first1, last1, sprout::next(first2), last2, comp)
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: 1 + sprout::detail::set_overlap_count(sprout::next(first1), last1, sprout::next(first2), last2, comp)
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: 0
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;
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}
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template<typename InputIterator1, typename InputIterator2>
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inline SPROUT_CONSTEXPR typename std::iterator_traits<InputIterator1>::difference_type
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set_overlap_count(
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InputIterator1 first1, InputIterator1 last1,
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InputIterator2 first2, InputIterator2 last2
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)
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{
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return sprout::detail::set_overlap_count(first1, last1, first2, last2, sprout::less<>());
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}
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} // namespace detail
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} // namespace sprout
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#endif // #ifndef SPROUT_DETAIL_ALGORITHM_SET_OVERLAP_COUNT_HPP
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