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54 lines
1.9 KiB
C++
54 lines
1.9 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2019 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_ALGORITHM_CXX14_MERGE_HPP
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#define SPROUT_ALGORITHM_CXX14_MERGE_HPP
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#include <sprout/config.hpp>
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#include <sprout/iterator/type_traits/is_iterator_of.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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#include <sprout/algorithm/cxx14/copy.hpp>
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#include <sprout/functional/less.hpp>
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namespace sprout {
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//
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// 25.4.4 Merge
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//
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template<
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typename InputIterator1, typename InputIterator2, typename OutputIterator, typename Compare,
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typename sprout::enabler_if<sprout::is_iterator_outputable<OutputIterator>::value>::type = sprout::enabler
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>
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inline SPROUT_CXX14_CONSTEXPR OutputIterator
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merge(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp) {
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while (true) {
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if (first1 == last1) {
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return sprout::copy(first2, last2, result);
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}
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if (first2 == last2) {
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return sprout::copy(first1, last1, result);
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}
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*result++ = comp(*first2, *first1)
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? *first2++
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: *first1++
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;
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}
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}
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template<
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typename InputIterator1, typename InputIterator2, typename OutputIterator,
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typename sprout::enabler_if<sprout::is_iterator_outputable<OutputIterator>::value>::type = sprout::enabler
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>
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inline SPROUT_CXX14_CONSTEXPR OutputIterator
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merge(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, OutputIterator result) {
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return sprout::merge(
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first1, last1, first2, last2, result,
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sprout::less<>()
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);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_ALGORITHM_CXX14_MERGE_HPP
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