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Add three-way operations to move_op & swap_op

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Ion Gaztañaga
2016-05-13 00:22:20 +02:00
parent 94627830e6
commit 6e07bb846c
1 changed files with 18 additions and 0 deletions
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18
include/boost/move/algo/detail/basic_op.hpp
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@@ -21,12 +21,14 @@
#include <boost/move/utility_core.hpp> #include <boost/move/utility_core.hpp>
#include <boost/move/adl_move_swap.hpp> #include <boost/move/adl_move_swap.hpp>
#include <boost/move/detail/iterator_traits.hpp>
namespace boost { namespace boost {
namespace movelib { namespace movelib {
struct forward_t{}; struct forward_t{};
struct backward_t{}; struct backward_t{};
struct three_way_t{};
struct move_op struct move_op
{ {
@@ -41,6 +43,13 @@ struct move_op
template <class SourceIt, class DestinationIt> template <class SourceIt, class DestinationIt>
DestinationIt operator()(backward_t, SourceIt first, SourceIt last, DestinationIt dest_last) DestinationIt operator()(backward_t, SourceIt first, SourceIt last, DestinationIt dest_last)
{ return ::boost::move_backward(first, last, dest_last); } { return ::boost::move_backward(first, last, dest_last); }
template <class SourceIt, class DestinationIt1, class DestinationIt2>
void operator()(three_way_t, SourceIt srcit, DestinationIt1 dest1it, DestinationIt2 dest2it)
{
*dest2it = boost::move(*dest1it);
*dest1it = boost::move(*srcit);
}
}; };
struct swap_op struct swap_op
@@ -56,6 +65,15 @@ struct swap_op
template <class SourceIt, class DestinationIt> template <class SourceIt, class DestinationIt>
DestinationIt operator()(backward_t, SourceIt first, SourceIt last, DestinationIt dest_begin) DestinationIt operator()(backward_t, SourceIt first, SourceIt last, DestinationIt dest_begin)
{ return boost::adl_move_swap_ranges_backward(first, last, dest_begin); } { return boost::adl_move_swap_ranges_backward(first, last, dest_begin); }
template <class SourceIt, class DestinationIt1, class DestinationIt2>
void operator()(three_way_t, SourceIt srcit, DestinationIt1 dest1it, DestinationIt2 dest2it)
{
typename ::boost::movelib::iterator_traits<SourceIt>::value_type tmp(boost::move(*dest2it));
*dest2it = boost::move(*dest1it);
*dest1it = boost::move(*srcit);
*srcit = boost::move(tmp);
}
}; };
}} //namespace boost::movelib }} //namespace boost::movelib