ceph/src/boost/libs/msm/include/boost/msm/event_traits.hpp

   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
  11 #ifndef BOOST_MSM_EVENT_TRAITS_H
  12 #define BOOST_MSM_EVENT_TRAITS_H
  13
  14 #include <boost/any.hpp>
  15 #include <boost/mpl/bool.hpp>
  16
  17 namespace boost { namespace msm
  18 {
  19
  20 template< typename Event >
  21 struct is_kleene_event
  22 {
  23   // default: no event is a kleene event (kleene: matches any event in a transitions)
  24   typedef ::boost::mpl::false_ type;
  25 };
  26
  27 // add this way in this namespace specializations for events which you want to use as kleene
  28 // requirement: a copy-constructor matching the events which will be converted to this kleene
  29 template<>
  30 struct is_kleene_event< boost::any >
  31 {
  32   typedef ::boost::mpl::true_ type;
  33 };
  34
  35 } } // boost::msm
  36 #endif //BOOST_MSM_EVENT_TRAITS_H