Added thirdparty: boost library

thirdparty/include/boost/variant/detail/move.hpp

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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) 2013-2023 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 <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+#include <utility>
+
+namespace boost { namespace detail { namespace variant {
+
+using std::move;
+
+//////////////////////////////////////////////////////////////////////////
+// function template move_swap
+//
+// Swaps using Koenig lookup but falls back to move-swap for primitive
+// types and on non-conforming compilers.
+//
+
+template <typename T>
+inline void move_swap(T& lhs, T& rhs)
+{
+    using std::swap;
+    swap(lhs, rhs);
+}
+
+}}} // namespace boost::detail::variant
+
+#endif // BOOST_VARIANT_DETAIL_MOVE_HPP
+
+
+