size_impl.hpp 932 B

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  1. /*=============================================================================
  2. Copyright (c) 2001-2011 Joel de Guzman
  3. Distributed under the Boost Software License, Version 1.0. (See accompanying
  4. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  5. ==============================================================================*/
  6. #if !defined(BOOST_FUSION_SIZE_IMPL_09272006_0724)
  7. #define BOOST_FUSION_SIZE_IMPL_09272006_0724
  8. #include <boost/fusion/support/config.hpp>
  9. #include <boost/tuple/tuple.hpp>
  10. #include <boost/mpl/int.hpp>
  11. namespace boost { namespace fusion
  12. {
  13. struct boost_tuple_tag;
  14. namespace extension
  15. {
  16. template<typename T>
  17. struct size_impl;
  18. template <>
  19. struct size_impl<boost_tuple_tag>
  20. {
  21. template <typename Sequence>
  22. struct apply : mpl::int_<tuples::length<Sequence>::value> {};
  23. };
  24. }
  25. }}
  26. #endif