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https://github.com/bolero-MURAKAMI/Sprout.git
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61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
#ifndef SPROUT_ALGORITHM_FIND_END_HPP
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#define SPROUT_ALGORITHM_FIND_END_HPP
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#include <sprout/config.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/algorithm/search.hpp>
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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 Iterator1, typename Iterator2>
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struct iter_equal_to {
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public:
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SPROUT_CONSTEXPR bool operator()(
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typename std::iterator_traits<Iterator1>::value_type const& x,
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typename std::iterator_traits<Iterator2>::value_type const& y
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) const
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{
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return x == y;
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}
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};
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} // namespace detail
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// 25.2.6 Find end
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template<typename ForwardIterator1, typename ForwardIterator2, typename BinaryPredicate>
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SPROUT_CONSTEXPR ForwardIterator1 find_end(
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ForwardIterator1 first1,
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ForwardIterator1 last1,
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ForwardIterator2 first2,
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ForwardIterator2 last2,
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BinaryPredicate pred
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)
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{
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return first1 == last1 || first2 == last2 ? last1
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: sprout::search(first1, last1, first2, last2, pred) == first1
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&& sprout::search(sprout::next(first1), last1, first2, last2, pred) == last1
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? first1
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: sprout::find_end(sprout::next(first1), last1, first2, last2, pred)
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;
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}
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template<typename ForwardIterator1, typename ForwardIterator2>
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SPROUT_CONSTEXPR ForwardIterator1 find_end(
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ForwardIterator1 first1,
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ForwardIterator1 last1,
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ForwardIterator2 first2,
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ForwardIterator2 last2
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)
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{
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return sprout::find_end(
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first1,
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last1,
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first2,
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last2,
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sprout::detail::iter_equal_to<ForwardIterator1, ForwardIterator2>()
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);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_FIND_END_HPP
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