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// Copyright Neil Groves 2009. Use, modification and // distribution is subject to the Boost Software License, Version // 1.0. (See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt) // // // For more information, see http://www.boost.org/libs/range/ // #ifndef BOOST_RANGE_ALGORITHM_SWAP_RANGES_HPP_INCLUDED #define BOOST_RANGE_ALGORITHM_SWAP_RANGES_HPP_INCLUDED #include <boost/assert.hpp> #include <boost/concept_check.hpp> #include <boost/iterator/iterator_categories.hpp> #include <boost/range/begin.hpp> #include <boost/range/end.hpp> #include <boost/range/concepts.hpp> #include <boost/range/iterator.hpp> #include <algorithm> namespace boost { namespace range_detail { template<class Iterator1, class Iterator2> void swap_ranges_impl(Iterator1 it1, Iterator1 last1, Iterator2 it2, Iterator2 last2, single_pass_traversal_tag, single_pass_traversal_tag) { ignore_unused_variable_warning(last2); for (; it1 != last1; ++it1, ++it2) { BOOST_ASSERT( it2 != last2 ); std::iter_swap(it1, it2); } } template<class Iterator1, class Iterator2> void swap_ranges_impl(Iterator1 it1, Iterator1 last1, Iterator2 it2, Iterator2 last2, random_access_traversal_tag, random_access_traversal_tag) { ignore_unused_variable_warning(last2); BOOST_ASSERT( last2 - it2 >= last1 - it1 ); std::swap_ranges(it1, last1, it2); } template<class Iterator1, class Iterator2> void swap_ranges_impl(Iterator1 first1, Iterator1 last1, Iterator2 first2, Iterator2 last2) { swap_ranges_impl(first1, last1, first2, last2, BOOST_DEDUCED_TYPENAME iterator_traversal<Iterator1>::type(), BOOST_DEDUCED_TYPENAME iterator_traversal<Iterator2>::type()); } } // namespace range_detail namespace range { /// \brief template function swap_ranges /// /// range-based version of the swap_ranges std algorithm /// /// \pre SinglePassRange1 is a model of the SinglePassRangeConcept /// \pre SinglePassRange2 is a model of the SinglePassRangeConcept template< class SinglePassRange1, class SinglePassRange2 > inline SinglePassRange2& swap_ranges(SinglePassRange1& range1, SinglePassRange2& range2) { BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<SinglePassRange1>)); BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<SinglePassRange2>)); boost::range_detail::swap_ranges_impl( boost::begin(range1), boost::end(range1), boost::begin(range2), boost::end(range2)); return range2; } /// \overload template< class SinglePassRange1, class SinglePassRange2 > inline SinglePassRange2& swap_ranges(const SinglePassRange1& range1, SinglePassRange2& range2) { BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const SinglePassRange1>)); BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<SinglePassRange2>)); boost::range_detail::swap_ranges_impl( boost::begin(range1), boost::end(range1), boost::begin(range2), boost::end(range2)); return range2; } /// \overload template< class SinglePassRange1, class SinglePassRange2 > inline const SinglePassRange2& swap_ranges(SinglePassRange1& range1, const SinglePassRange2& range2) { BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<SinglePassRange1>)); BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const SinglePassRange2>)); boost::range_detail::swap_ranges_impl( boost::begin(range1), boost::end(range1), boost::begin(range2), boost::end(range2)); return range2; } /// \overload template< class SinglePassRange1, class SinglePassRange2 > inline const SinglePassRange2& swap_ranges(const SinglePassRange1& range1, const SinglePassRange2& range2) { BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const SinglePassRange1>)); BOOST_RANGE_CONCEPT_ASSERT((SinglePassRangeConcept<const SinglePassRange2>)); boost::range_detail::swap_ranges_impl( boost::begin(range1), boost::end(range1), boost::begin(range2), boost::end(range2)); return range2; } } // namespace range using range::swap_ranges; } // namespace boost #endif // include guard