Chris@16: // Copyright 2008 Christophe Henry
Chris@16: // henry UNDERSCORE christophe AT hotmail DOT com
Chris@16: // This is an extended version of the state machine available in the boost::mpl library
Chris@16: // Distributed under the same license as the original.
Chris@16: // Copyright for the original version:
Chris@16: // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
Chris@16: // under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_MSM_ROW2_HELPER_HPP
Chris@16: #define BOOST_MSM_ROW2_HELPER_HPP
Chris@16: 
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: #include <boost/fusion/include/at_key.hpp>
Chris@16: 
Chris@16: namespace boost { namespace msm { namespace front
Chris@16: {
Chris@16:     namespace detail
Chris@16:     {
Chris@16:         template<
Chris@16:             typename CalledForAction
Chris@16:             , typename Event
Chris@16:             , void (CalledForAction::*action)(Event const&)
Chris@16:         >
Chris@16:         struct row2_action_helper
Chris@16:         {
Chris@16:             template <class FSM,class Evt,class SourceState,class TargetState, class AllStates>
Chris@16:             static void call_helper(FSM&,Evt const& evt,SourceState&,TargetState&,
Chris@16:                                     AllStates& all_states,::boost::mpl::false_ const &)
Chris@16:             {
Chris@16:                 // in this front-end, we don't need to know source and target states
Chris@16:                 ( ::boost::fusion::at_key<CalledForAction>(all_states).*action)(evt);
Chris@16:             }
Chris@16:             template <class FSM,class Evt,class SourceState,class TargetState, class AllStates>
Chris@16:             static void call_helper(FSM& fsm,Evt const& evt,SourceState&,TargetState&,AllStates&,
Chris@16:                                     ::boost::mpl::true_ const &)
Chris@16:             {
Chris@16:                 // in this front-end, we don't need to know source and target states
Chris@16:                 (fsm.*action)(evt);
Chris@16:             }
Chris@16:         };
Chris@16: 
Chris@16:         template<
Chris@16:             typename CalledForGuard
Chris@16:             , typename Event
Chris@16:             , bool (CalledForGuard::*guard)(Event const&)
Chris@16:         >
Chris@16:         struct row2_guard_helper
Chris@16:         {
Chris@16:             template <class FSM,class Evt,class SourceState,class TargetState,class AllStates>
Chris@16:             static bool call_helper(FSM&,Evt const& evt,SourceState&,TargetState&,
Chris@16:                                     AllStates& all_states, ::boost::mpl::false_ const &)
Chris@16:             {
Chris@16:                 // in this front-end, we don't need to know source and target states
Chris@16:                 return ( ::boost::fusion::at_key<CalledForGuard>(all_states).*guard)(evt);
Chris@16:             }
Chris@16:             template <class FSM,class Evt,class SourceState,class TargetState,class AllStates>
Chris@16:             static bool call_helper(FSM& fsm,Evt const& evt,SourceState&,TargetState&,
Chris@16:                                     AllStates&,::boost::mpl::true_ const &)
Chris@16:             {
Chris@16:                 // in this front-end, we don't need to know source and target states
Chris@16:                 return (fsm.*guard)(evt);
Chris@16:             }
Chris@16:         };
Chris@16:     }
Chris@16: 
Chris@16: }}}
Chris@16: 
Chris@16: #endif //BOOST_MSM_ROW2_HELPER_HPP
Chris@16: