text: 
  #ifndef BOOST_MPL_AUX_HAS_TAG_HPP_INCLUDED
  #define BOOST_MPL_AUX_HAS_TAG_HPP_INCLUDED
  
  // Copyright Aleksey Gurtovoy 2002-2004
  //
  // 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.
  
  // $Source$
  // $Date: 2004-09-02 17:41:37 +0200 (jeu., 02 sept. 2004) $
  // $Revision: 24874 $
  
  #include <boost/mpl/has_xxx.hpp>
  
  namespace boost { namespace mpl { namespace aux {
  BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_tag, tag, false)
  }}}
  
  #endif // BOOST_MPL_AUX_HAS_TAG_HPP_INCLUDED
  