text: 
  #ifndef BOOST_MPL_MAP_AUX_KEY_TYPE_IMPL_HPP_INCLUDED
  #define BOOST_MPL_MAP_AUX_KEY_TYPE_IMPL_HPP_INCLUDED
  
  // Copyright Aleksey Gurtovoy 2003-2004
  // Copyright David Abrahams 2003-2004
  //
  // 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: /physbam_repository/External_Libraries/Archives/boost/boost/mpl/map/aux_/key_type_impl.hpp,v $
  // $Date: 2007/02/12 18:25:37 $
  // $Revision: 1.1 $
  
  #include <boost/mpl/key_type_fwd.hpp>
  #include <boost/mpl/pair.hpp>
  #include <boost/mpl/map/aux_/tag.hpp>
  
  namespace boost {
  namespace mpl {
  
  template<>
  struct key_type_impl< aux::map_tag >
  {
      template< typename Map, typename T > struct apply
          : first<T>
      {
      };
  };
  
  }}
  
  #endif // BOOST_MPL_MAP_AUX_KEY_TYPE_IMPL_HPP_INCLUDED
  