ext-boost/boost/range/algorithm/swap_ranges.hpp
2014-12-07 20:45:27 +01:00

133 lines
4.4 KiB
C++

// 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