1 | // Copyright Neil Groves 2009. Use, modification and |
---|---|
2 | // distribution is subject to the Boost Software License, Version |
3 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
4 | // http://www.boost.org/LICENSE_1_0.txt) |
5 | // |
6 | // |
7 | // For more information, see http://www.boost.org/libs/range/ |
8 | // |
9 | #ifndef BOOST_RANGE_ALGORITHM_ROTATE_HPP_INCLUDED |
10 | #define BOOST_RANGE_ALGORITHM_ROTATE_HPP_INCLUDED |
11 | |
12 | #include <boost/concept_check.hpp> |
13 | #include <boost/range/begin.hpp> |
14 | #include <boost/range/end.hpp> |
15 | #include <boost/range/concepts.hpp> |
16 | #include <algorithm> |
17 | |
18 | namespace boost |
19 | { |
20 | namespace range |
21 | { |
22 | |
23 | /// \brief template function rotate |
24 | /// |
25 | /// range-based version of the rotate std algorithm |
26 | /// |
27 | /// \pre Rng meets the requirements for a Forward range |
28 | template<class ForwardRange> |
29 | inline ForwardRange& rotate(ForwardRange& rng, |
30 | BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type middle) |
31 | { |
32 | BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> )); |
33 | std::rotate(boost::begin(rng), middle, boost::end(rng)); |
34 | return rng; |
35 | } |
36 | |
37 | /// \overload |
38 | template<class ForwardRange> |
39 | inline const ForwardRange& rotate(const ForwardRange& rng, |
40 | BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type middle) |
41 | { |
42 | BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> )); |
43 | std::rotate(boost::begin(rng), middle, boost::end(rng)); |
44 | return rng; |
45 | } |
46 | |
47 | } // namespace range |
48 | using range::rotate; |
49 | } // namespace boost |
50 | |
51 | #endif // include guard |
52 |