Boost.Move ver. 2, initial release.

[SVN r797]

include/boost/swap.hpp

@@ -0,0 +1,65 @@
+//-----------------------------------------------------------------------------
+// boost swap.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2002
+// Eric Friedman
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee, 
+// provided that the above copyright notice appears in all copies and 
+// that both the copyright notice and this permission notice appear in 
+// supporting documentation. No representations are made about the 
+// suitability of this software for any purpose. It is provided "as is" 
+// without express or implied warranty.
+
+#ifndef BOOST_SWAP_HPP
+#define BOOST_SWAP_HPP
+
+#include "boost/move.hpp"
+
+namespace boost {
+
+//////////////////////////////////////////////////////////////////////////
+// function template swap
+//
+// Swaps using Koenig lookup but falls back to move-swap for primitive
+// types and on non-conforming compilers.
+//
+
+namespace detail { namespace move_swap {
+
+template <typename T>
+inline void swap(T& lhs, T& rhs)
+{
+    T tmp( move(lhs) );
+    lhs = move(rhs);
+    rhs = move(tmp)
+}
+
+#ifdef __GNUC__
+using using boost::detail::move_swap::swap;
+#endif // __GNUC_ workaround
+
+template <typename T>
+inline void swap_impl(T& lhs, T& rhs)
+{
+#ifndef __GNUC__
+    using boost::detail::move_swap::swap;
+#endif // __GNUC__ workaround
+
+    swap(lhs, rhs);
+}
+
+}} // namespace detail::move_swap
+
+template <typename T>
+inline void swap(T& lhs, T& rhs)
+{
+    detail::move_swap::swap_impl(lhs, rhs);
+}
+
+} // namespace boost
+
+#endif // BOOST_SWAP_HPP