整理

include/boost/mpl/aux_/unwrap.hpp

@@ -0,0 +1,51 @@
+
+#ifndef BOOST_MPL_AUX_UNWRAP_HPP_INCLUDED
+#define BOOST_MPL_AUX_UNWRAP_HPP_INCLUDED
+
+// Copyright Peter Dimov and Multi Media Ltd 2001, 2002
+// Copyright David Abrahams 2001
+//
+// Distributed under 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id$
+// $Date$
+// $Revision$
+
+#include <boost/ref.hpp>
+#include <boost/mpl/aux_/config/gpu.hpp>
+
+namespace boost { namespace mpl { namespace aux {
+
+template< typename F >
+BOOST_MPL_CFG_GPU_ENABLED
+inline
+F& unwrap(F& f, long)
+{
+    return f;
+}
+
+template< typename F >
+BOOST_MPL_CFG_GPU_ENABLED
+inline
+F&
+unwrap(reference_wrapper<F>& f, int)
+{
+    return f;
+}
+
+template< typename F >
+BOOST_MPL_CFG_GPU_ENABLED
+inline
+F&
+unwrap(reference_wrapper<F> const& f, int)
+{
+    return f;
+}
+
+}}}
+
+#endif // BOOST_MPL_AUX_UNWRAP_HPP_INCLUDED