next_prior.hpp 1.0 KB

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  1. #ifndef BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED
  2. #define BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED
  3. // Copyright Aleksey Gurtovoy 2000-2004
  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/aux_/common_name_wknd.hpp>
  14. #include <boost/mpl/aux_/na_spec.hpp>
  15. #include <boost/mpl/aux_/lambda_support.hpp>
  16. namespace boost { namespace mpl {
  17. BOOST_MPL_AUX_COMMON_NAME_WKND(next)
  18. BOOST_MPL_AUX_COMMON_NAME_WKND(prior)
  19. template<
  20. typename BOOST_MPL_AUX_NA_PARAM(T)
  21. >
  22. struct next
  23. {
  24. typedef typename T::next type;
  25. BOOST_MPL_AUX_LAMBDA_SUPPORT(1,next,(T))
  26. };
  27. template<
  28. typename BOOST_MPL_AUX_NA_PARAM(T)
  29. >
  30. struct prior
  31. {
  32. typedef typename T::prior type;
  33. BOOST_MPL_AUX_LAMBDA_SUPPORT(1,prior,(T))
  34. };
  35. BOOST_MPL_AUX_NA_SPEC(1, next)
  36. BOOST_MPL_AUX_NA_SPEC(1, prior)
  37. }}
  38. #endif // BOOST_MPL_NEXT_PRIOR_HPP_INCLUDED