empty_impl.hpp 733 B

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  1. #ifndef BOOST_MPL_MAP_AUX_EMPTY_IMPL_HPP_INCLUDED
  2. #define BOOST_MPL_MAP_AUX_EMPTY_IMPL_HPP_INCLUDED
  3. // Copyright Aleksey Gurtovoy 2003-2004
  4. //
  5. // Distributed under the Boost Software License, Version 1.0.
  6. // (See accompanying file LICENSE_1_0.txt or copy at
  7. // http://www.boost.org/LICENSE_1_0.txt)
  8. //
  9. // See http://www.boost.org/libs/mpl for documentation.
  10. // $Id$
  11. // $Date$
  12. // $Revision$
  13. #include <boost/mpl/empty_fwd.hpp>
  14. #include <boost/mpl/not.hpp>
  15. #include <boost/mpl/map/aux_/tag.hpp>
  16. namespace boost { namespace mpl {
  17. template<>
  18. struct empty_impl< aux::map_tag >
  19. {
  20. template< typename Map > struct apply
  21. : not_< typename Map::size >
  22. {
  23. };
  24. };
  25. }}
  26. #endif // BOOST_MPL_MAP_AUX_EMPTY_IMPL_HPP_INCLUDED