fold_op.hpp 822 B

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  1. #ifndef BOOST_MPL_AUX_FOLD_OP_HPP_INCLUDED
  2. #define BOOST_MPL_AUX_FOLD_OP_HPP_INCLUDED
  3. // Copyright Aleksey Gurtovoy 2001-2004
  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/apply.hpp>
  14. namespace boost { namespace mpl { namespace aux {
  15. // hand-written version is more efficient than bind/lambda expression
  16. template< typename Op >
  17. struct fold_op
  18. {
  19. template< typename T1, typename T2 > struct apply
  20. {
  21. typedef typename apply2<
  22. Op
  23. , T1
  24. , typename T2::type
  25. >::type type;
  26. };
  27. };
  28. }}}
  29. #endif // BOOST_MPL_AUX_FOLD_OP_HPP_INCLUDED