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56 lines
2 KiB
C++
56 lines
2 KiB
C++
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/*=============================================================================
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Copyright (c) 2011-2014 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_SET_DIFFERENCE_HPP
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#define SPROUT_ALGORITHM_CXX14_SET_DIFFERENCE_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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// 25.4.5.4 set_difference
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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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set_difference(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp) {
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while (first1 != last1 && first2 != last2) {
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if (comp(*first1, *first2)) {
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*result = *first1;
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++first1;
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++result;
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} else if (comp(*first2, *first1)) {
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++first2;
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} else {
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++first1;
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++first2;
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}
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}
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return sprout::copy(first1, last1, result);
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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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set_difference(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, OutputIterator result) {
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return sprout::set_difference(
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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_SET_DIFFERENCE_HPP
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