event_traits.hpp 1.1 KB

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  1. // Copyright 2008 Christophe Henry
  2. // henry UNDERSCORE christophe AT hotmail DOT com
  3. // This is an extended version of the state machine available in the boost::mpl library
  4. // Distributed under the same license as the original.
  5. // Copyright for the original version:
  6. // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
  7. // under the Boost Software License, Version 1.0. (See accompanying
  8. // file LICENSE_1_0.txt or copy at
  9. // http://www.boost.org/LICENSE_1_0.txt)
  10. #ifndef BOOST_MSM_EVENT_TRAITS_H
  11. #define BOOST_MSM_EVENT_TRAITS_H
  12. #include <boost/any.hpp>
  13. #include <boost/mpl/bool.hpp>
  14. namespace boost { namespace msm
  15. {
  16. template< typename Event >
  17. struct is_kleene_event
  18. {
  19. // default: no event is a kleene event (kleene: matches any event in a transitions)
  20. typedef ::boost::mpl::false_ type;
  21. };
  22. // add this way in this namespace specializations for events which you want to use as kleene
  23. // requirement: a copy-constructor matching the events which will be converted to this kleene
  24. template<>
  25. struct is_kleene_event< boost::any >
  26. {
  27. typedef ::boost::mpl::true_ type;
  28. };
  29. } } // boost::msm
  30. #endif //BOOST_MSM_EVENT_TRAITS_H