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https://github.com/bolero-MURAKAMI/Sprout.git
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33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
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#ifndef SPROUT_ALGORITHM_INCLUDES_HPP
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#define SPROUT_ALGORITHM_INCLUDES_HPP
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#include <sprout/config.hpp>
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#include <sprout/iterator/operation.hpp>
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namespace sprout {
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// Copyright (C) 2011 RiSK (sscrisk)
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// 25.4.5.1 includes
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template<typename InputIterator1, typename InputIterator2>
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SPROUT_CONSTEXPR bool includes(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2) {
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return first2 == last2 ? true
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: first1 == last1 ? false
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: !(*first1 < *first2) && !(*first2 < *first1)
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? sprout::includes(sprout::next(first1), last1, sprout::next(first2), last2)
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: sprout::includes(sprout::next(first1), last1, first2, last2)
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;
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}
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template<typename InputIterator1, typename InputIterator2, typename Compare>
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SPROUT_CONSTEXPR bool includes(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, Compare comp) {
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return first2 == last2 ? true
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: first1 == last1 ? false
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: !comp(*first1, *first2) && !comp(*first2, *first1)
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? sprout::includes(sprout::next(first1), last1, sprout::next(first2), last2)
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: sprout::includes(sprout::next(first1), last1, first2, last2)
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;
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_INCLUDES_HPP
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