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https://github.com/bolero-MURAKAMI/Sprout.git
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Change find_end:
1.Fix for ForwardIterator when [first2, last2) is empty. 2.Fix RandomAccessIterator version.(search from last1) 3.Add BidirectionalIterator version.(search from last1) 4.Add sprout::detail::search_one_rev helper function for BidirectionalIterator version.
This commit is contained in:
Mitsuru Kariya
parent
f194a7f68c
commit
bfc22a86a7
2 changed files with 250 additions and 67 deletions
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@ -16,74 +16,148 @@
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#include <sprout/functional/equal_to.hpp>
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#include <sprout/utility/pair/pair.hpp>
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#include <sprout/detail/algorithm/search_one.hpp>
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#include <sprout/detail/algorithm/search_one_rev.hpp>
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namespace sprout {
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namespace detail {
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// !!!
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// template<typename RandomAccessIterator1>
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// inline SPROUT_CONSTEXPR RandomAccessIterator1
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// find_end_impl_check_ra(RandomAccessIterator1 first1, RandomAccessIterator1 result, RandomAccessIterator1 searched) {
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// return searched == first1 ? searched
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// : result
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// ;
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// }
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// template<typename RandomAccessIterator1, typename ForwardIterator2, typename BinaryPredicate>
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// inline SPROUT_CONSTEXPR RandomAccessIterator1
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// find_end_impl_ra(
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// RandomAccessIterator1 first1, RandomAccessIterator1 last1,
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// ForwardIterator2 first2, ForwardIterator2 last2,
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// BinaryPredicate pred,
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// typename std::iterator_traits<RandomAccessIterator1>::difference_type pivot, RandomAccessIterator1 last1_, RandomAccessIterator1 result,
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// RandomAccessIterator1 searched
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// )
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// {
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// return searched == last1_ ? result
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// : searched < first1 ? pivot == 0
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// ? sprout::detail::find_end_impl_check_ra(
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// first1, searched,
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// sprout::detail::search_one(first1, last1_, first2, last2, pred)
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// )
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// : sprout::detail::find_end_impl_ra(
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// sprout::next(first1, pivot), last1, first2, last2, pred,
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// (sprout::distance(first1, last1) - pivot) / 2, last1_, searched,
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// sprout::detail::find_end_impl_ra(
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// first1, sprout::next(first1, pivot), first2, last2, pred,
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// pivot / 2, last1_, searched,
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// first1
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// )
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// )
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// : pivot == 0 ? sprout::detail::search_one(first1, last1_, first2, last2, pred)
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// : sprout::detail::find_end_impl_ra(
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// sprout::next(first1, pivot), last1, first2, last2, pred,
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// (sprout::distance(first1, last1) - pivot) / 2, last1_, result,
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// sprout::detail::find_end_impl_ra(
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// first1, sprout::next(first1, pivot), first2, last2, pred,
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// pivot / 2, last1_, result,
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// first1
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// )
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// )
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// ;
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// }
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// template<typename RandomAccessIterator1, typename ForwardIterator2, typename BinaryPredicate>
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// inline SPROUT_CONSTEXPR typename std::enable_if<
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// sprout::is_constant_distance_iterator<RandomAccessIterator1>::value,
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// RandomAccessIterator1
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// >::type
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// find_end(
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// RandomAccessIterator1 first1, RandomAccessIterator1 last1,
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// ForwardIterator2 first2, ForwardIterator2 last2,
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// BinaryPredicate pred,
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// std::random_access_iterator_tag*
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// )
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// {
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// return first1 == last1 ? last1
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// : sprout::detail::find_end_impl_ra(
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// first1, last1, first2, last2, pred,
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// sprout::distance(first1, last1) / 2, last1, last1,
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// first1
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// )
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// ;
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// }
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template<typename RandomAccessIterator1>
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inline SPROUT_CONSTEXPR RandomAccessIterator1
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find_end_impl_check_ra(RandomAccessIterator1 first1, RandomAccessIterator1 last1_, RandomAccessIterator1 searched) {
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return searched == first1 ? searched
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: last1_
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;
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}
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template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR RandomAccessIterator1
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find_end_impl_ra(
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RandomAccessIterator1 first1, RandomAccessIterator1 last1,
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RandomAccessIterator2 first2, RandomAccessIterator2 last2,
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BinaryPredicate pred,
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typename std::iterator_traits<RandomAccessIterator1>::difference_type pivot, RandomAccessIterator1 last1_,
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RandomAccessIterator1 searched
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)
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{
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return searched != last1_ ? searched
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: pivot == 0
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? sprout::detail::find_end_impl_check_ra(
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first1, last1_,
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sprout::detail::search_one(first1, last1_, first2, last2, pred)
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)
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: sprout::detail::find_end_impl_ra(
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first1, sprout::next(first1, pivot), first2, last2, pred,
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pivot / 2, last1_,
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sprout::detail::find_end_impl_ra(
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sprout::next(first1, pivot), last1, first2, last2, pred,
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(sprout::distance(first1, last1) - pivot) / 2, last1_,
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last1_
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)
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)
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;
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}
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template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR RandomAccessIterator1
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find_end_impl_ra1(
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RandomAccessIterator1 first1, RandomAccessIterator1 last1,
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RandomAccessIterator2 first2, RandomAccessIterator2 last2,
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BinaryPredicate pred,
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typename std::iterator_traits<RandomAccessIterator1>::difference_type len1,
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typename std::iterator_traits<RandomAccessIterator2>::difference_type len2
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)
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{
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return len1 < len2 ? last1
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: sprout::detail::find_end_impl_ra(
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first1, last1 - len2 + 1, first2, last2, pred,
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(len1 - len2 + 1) / 2, last1, last1
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)
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;
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}
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template<typename RandomAccessIterator1, typename RandomAccessIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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sprout::is_constant_distance_iterator<RandomAccessIterator1>::value
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&& sprout::is_constant_distance_iterator<RandomAccessIterator2>::value,
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RandomAccessIterator1
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>::type
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find_end(
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RandomAccessIterator1 first1, RandomAccessIterator1 last1,
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RandomAccessIterator2 first2, RandomAccessIterator2 last2,
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BinaryPredicate pred,
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std::random_access_iterator_tag*
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)
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{
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return sprout::detail::find_end_impl_ra1(
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first1, last1, first2, last2, pred,
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sprout::distance(first1, last1), sprout::distance(first2, last2)
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)
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;
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}
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template<typename BidirectionalIterator1>
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inline SPROUT_CONSTEXPR sprout::pair<BidirectionalIterator1, BidirectionalIterator1>
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find_end_impl_check_bi(
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sprout::pair<BidirectionalIterator1, BidirectionalIterator1> const& current,
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BidirectionalIterator1 first1, sprout::pair<BidirectionalIterator1, bool> searched
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)
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{
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typedef sprout::pair<BidirectionalIterator1, BidirectionalIterator1> type;
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return searched.second ? type(first1, current.second)
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: searched.first == current.first ? type(sprout::prev(current.first), current.second)
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: type(current.first, searched.first)
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;
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}
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template<typename BidirectionalIterator1, typename BidirectionalIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR sprout::pair<BidirectionalIterator1, BidirectionalIterator1>
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find_end_impl_bi1(
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sprout::pair<BidirectionalIterator1, BidirectionalIterator1> const& current,
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BidirectionalIterator1 first1, BidirectionalIterator1 last1,
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BidirectionalIterator2 first2, BidirectionalIterator2 last2, BinaryPredicate pred,
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typename std::iterator_traits<BidirectionalIterator1>::difference_type n
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)
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{
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return current.second != last1 || current.first == first1 ? current
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: n == 1 ? sprout::detail::find_end_impl_check_bi(
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current, first1,
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sprout::detail::search_one_rev(first1, current.first, first2, last2, pred)
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)
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: sprout::detail::find_end_impl_bi1(
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sprout::detail::find_end_impl_bi1(
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current,
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first1, last1, first2, last2, pred, n / 2
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),
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first1, last1, first2, last2, pred, n - n / 2
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)
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;
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}
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template<typename BidirectionalIterator1, typename BidirectionalIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR sprout::pair<BidirectionalIterator1, BidirectionalIterator1>
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find_end_impl_bi(
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sprout::pair<BidirectionalIterator1, BidirectionalIterator1> const& current,
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BidirectionalIterator1 first1, BidirectionalIterator1 last1,
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BidirectionalIterator2 first2, BidirectionalIterator2 last2, BinaryPredicate pred,
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typename std::iterator_traits<BidirectionalIterator1>::difference_type n
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)
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{
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return current.second != last1 || current.first == first1 ? current
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: sprout::detail::find_end_impl_bi(
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sprout::detail::find_end_impl_bi1(
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current,
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first1, last1, first2, last2, pred, n
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),
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first1, last1, first2, last2, pred, n * 2
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)
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;
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}
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template<typename BidirectionalIterator1, typename BidirectionalIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR BidirectionalIterator1
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find_end(
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BidirectionalIterator1 first1, BidirectionalIterator1 last1,
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BidirectionalIterator2 first2, BidirectionalIterator2 last2,
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BinaryPredicate pred,
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std::bidirectional_iterator_tag*
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)
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{
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typedef sprout::pair<BidirectionalIterator1, BidirectionalIterator1> type;
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return sprout::detail::find_end_impl_bi(type(last1, last1), first1, last1, first2, last2, pred, 1).second;
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}
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template<typename ForwardIterator1>
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inline SPROUT_CONSTEXPR sprout::pair<ForwardIterator1, ForwardIterator1>
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@ -161,8 +235,8 @@ namespace sprout {
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BinaryPredicate pred
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)
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{
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typedef typename std::iterator_traits<ForwardIterator1>::iterator_category* category;
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return sprout::detail::find_end(first1, last1, first2, last2, pred, category());
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typedef typename sprout::common_iterator_category<ForwardIterator1, ForwardIterator2>::type* category;
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return first1 == last1 || first2 == last2 ? last1 : sprout::detail::find_end(first1, last1, first2, last2, pred, category());
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}
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template<typename ForwardIterator1, typename ForwardIterator2>
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