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//-----------------------------------------------------------------------------
// boost variant/detail/move.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2002-2003 Eric Friedman
// Copyright (c) 2002 by Andrei Alexandrescu
// Copyright (c) 2013 Antony Polukhin
//
// Use, modification and distribution are 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)
//
// This file derivative of MoJO. Much thanks to Andrei for his initial work.
// See <http://www.cuj.com/experts/2102/alexandr.htm> for information on MOJO.
// Re-issued here under the Boost Software License, with permission of the original
// author (Andrei Alexandrescu).
#ifndef BOOST_VARIANT_DETAIL_MOVE_HPP
#define BOOST_VARIANT_DETAIL_MOVE_HPP
#include <iterator> // for iterator_traits
#include <new> // for placement new
#include "boost/config.hpp"
#include "boost/detail/workaround.hpp"
#include "boost/move/move.hpp"
namespace boost { namespace detail { namespace variant {
using boost::move;
//////////////////////////////////////////////////////////////////////////
// function template move_swap
//
// Swaps using Koenig lookup but falls back to move-swap for primitive
// types and on non-conforming compilers.
//
namespace move_swap_fallback {
template <typename T1, typename T2>
inline void swap(T1& lhs, T2& rhs)
{
T1 tmp( boost::detail::variant::move(lhs) );
lhs = boost::detail::variant::move(rhs);
rhs = boost::detail::variant::move(tmp);
}
} // namespace move_swap_fallback
template <typename T>
inline void move_swap(T& lhs, T& rhs)
{
#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
move_swap_fallback::swap(lhs, rhs);
#else
using move_swap_fallback::swap;
swap(lhs, rhs);
#endif
}
}}} // namespace boost::detail::variant
#endif // BOOST_VARIANT_DETAIL_MOVE_HPP
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