mirror of
https://github.com/bolero-MURAKAMI/Sprout
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102 lines
3.6 KiB
C++
102 lines
3.6 KiB
C++
#ifndef SPROUT_ALGORITHM_FIND_FIRST_OF_HPP
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#define SPROUT_ALGORITHM_FIND_FIRST_OF_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/equal_to.hpp>
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#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
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#include HDR_FUNCTIONAL_SSCRISK_CEL_OR_SPROUT
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namespace sprout {
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namespace detail {
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template<typename RandomAccessIterator1, typename ForwardIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR RandomAccessIterator1
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find_first_of_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 found
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)
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{
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return found != first1 ? found
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: pivot == 0 ? sprout::find_if(first2, last2, NS_SSCRISK_CEL_OR_SPROUT::bind2nd(pred, *first1)) != last2 ? first1 : last1
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: sprout::detail::find_first_of_impl_ra(
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sprout::next(first1, pivot), last1, first2, last2, pred,
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(NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) - pivot) / 2,
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sprout::detail::find_first_of_impl_ra(
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first1, sprout::next(first1, pivot), first2, last2, pred,
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pivot / 2,
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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 RandomAccessIterator1
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find_first_of(
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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_first_of_impl_ra(
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first1, last1, first2, last2,
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pred, NS_SSCRISK_CEL_OR_SPROUT::distance(first1, last1) / 2, first1
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)
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;
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}
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// Copyright (C) 2011 RiSK (sscrisk)
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template<typename InputIterator1, typename ForwardIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR InputIterator1
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find_first_of_impl(
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InputIterator1 first1, InputIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2,
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BinaryPredicate pred
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)
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{
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return first1 == last1 || sprout::find_if(first2, last2, NS_SSCRISK_CEL_OR_SPROUT::bind2nd(pred, *first1)) != last2 ? first1
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: sprout::detail::find_first_of_impl(sprout::next(first1), last1, first2, last2, pred)
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;
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}
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template<typename InputIterator1, typename ForwardIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR InputIterator1
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find_first_of(
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InputIterator1 first1, InputIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2,
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BinaryPredicate pred,
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void*
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)
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{
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return sprout::detail::find_first_of_impl(first1, last1, first2, last2, pred);
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}
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} //namespace detail
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// 25.2.7 Find first
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template<typename InputIterator1, typename ForwardIterator2, typename BinaryPredicate>
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inline SPROUT_CONSTEXPR InputIterator1
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find_first_of(
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InputIterator1 first1, InputIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2,
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BinaryPredicate pred
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)
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{
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typedef typename std::iterator_traits<InputIterator1>::iterator_category* category;
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return sprout::detail::find_first_of(first1, last1, first2, last2, pred, category());
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}
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template<typename InputIterator1, typename ForwardIterator2>
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inline SPROUT_CONSTEXPR InputIterator1
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find_first_of(
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InputIterator1 first1, InputIterator1 last1,
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ForwardIterator2 first2, ForwardIterator2 last2
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)
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{
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return sprout::find_first_of(first1, last1, first2, last2, sprout::equal_to<>());
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_FIND_FIRST_OF_HPP
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