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1 // Copyright Neil Groves 2009. Use, modification and
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2 // distribution is subject to the Boost Software License, Version
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3 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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4 // http://www.boost.org/LICENSE_1_0.txt)
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5 //
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6 //
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7 // For more information, see http://www.boost.org/libs/range/
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8 //
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9 #ifndef BOOST_RANGE_ALGORITHM_ROTATE_HPP_INCLUDED
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10 #define BOOST_RANGE_ALGORITHM_ROTATE_HPP_INCLUDED
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11
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12 #include <boost/concept_check.hpp>
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13 #include <boost/range/begin.hpp>
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14 #include <boost/range/end.hpp>
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15 #include <boost/range/concepts.hpp>
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16 #include <algorithm>
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17
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18 namespace boost
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19 {
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20 namespace range
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21 {
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22
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23 /// \brief template function rotate
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24 ///
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25 /// range-based version of the rotate std algorithm
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26 ///
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27 /// \pre Rng meets the requirements for a Forward range
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28 template<class ForwardRange>
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29 inline ForwardRange& rotate(ForwardRange& rng,
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30 BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type middle)
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31 {
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32 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
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33 std::rotate(boost::begin(rng), middle, boost::end(rng));
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34 return rng;
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35 }
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36
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37 /// \overload
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38 template<class ForwardRange>
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39 inline const ForwardRange& rotate(const ForwardRange& rng,
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40 BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type middle)
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41 {
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42 BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
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43 std::rotate(boost::begin(rng), middle, boost::end(rng));
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44 return rng;
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45 }
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46
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47 } // namespace range
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48 using range::rotate;
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49 } // namespace boost
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50
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51 #endif // include guard
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