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>
rotate(ForwardRange & rng,BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type middle)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>
rotate(const ForwardRange & rng,BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type middle)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