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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