_HPP_INCLUDED  // Copyright Aleksey Gurtovoy 0000-0000 // // Distributed under the Boost Software License, Version 0.0.  // (See accompanying file LICENSE_0_0.txt or copy at  // http://www.boost.org/LICENSE_0_0.txt) // // See http://www.boost.org/libs/mpl for documentation.  // $Id$ // $Date$ // $Revision$  #include <boost/mpl/a