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// Copyright 2008 Christophe Henry
// henry UNDERSCORE christophe AT hotmail DOT com
// This is an extended version of the state machine available in the boost::mpl library
// Distributed under the same license as the original.
// Copyright for the original version:
// Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
// under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_MSM_FRONT_STATEMACHINE_DEF_H
#define BOOST_MSM_FRONT_STATEMACHINE_DEF_H
#include <exception>
#include <boost/assert.hpp>
#include <boost/mpl/vector.hpp>
#include <boost/msm/row_tags.hpp>
#include <boost/msm/back/common_types.hpp>
#include <boost/msm/front/states.hpp>
#include <boost/msm/front/completion_event.hpp>
#include <boost/msm/front/common_states.hpp>
namespace boost { namespace msm { namespace front
{
template<class Derived,class BaseState = default_base_state>
struct state_machine_def : public boost::msm::front::detail::state_base<BaseState>
{
// tags
// default: no flag
typedef ::boost::mpl::vector0<> flag_list;
typedef ::boost::mpl::vector0<> internal_flag_list;
//default: no deferred events
typedef ::boost::mpl::vector0<> deferred_events;
// customization (message queue, exceptions)
typedef ::boost::mpl::vector0<> configuration;
typedef BaseState BaseAllStates;
template<
typename T1
, class Event
, typename T2
, void (Derived::*action)(Event const&)
>
struct a_row
{
typedef a_row_tag row_type_tag;
typedef T1 Source;
typedef T2 Target;
typedef Event Evt;
template <class FSM,class SourceState,class TargetState,class AllStates>
static ::boost::msm::back::HandledEnum action_call(FSM& fsm,Event const& evt,SourceState&,TargetState&, AllStates&)
{
// in this front-end, we don't need to know source and target states
(fsm.*action)(evt);
return ::boost::msm::back::HANDLED_TRUE;
}
};
template<
typename T1
, class Event
, typename T2
>
struct _row
{
typedef _row_tag row_type_tag;
typedef T1 Source;
typedef T2 Target;
typedef Event Evt;
};
template<
typename T1
, class Event
, typename T2
, void (Derived::*action)(Event const&)
, bool (Derived::*guard)(Event const&)
>
struct row
{
typedef row_tag row_type_tag;
typedef T1 Source;
typedef T2 Target;
typedef Event Evt;
template <class FSM,class SourceState,class TargetState, class AllStates>
static ::boost::msm::back::HandledEnum action_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
(fsm.*action)(evt);
return ::boost::msm::back::HANDLED_TRUE;
}
template <class FSM,class SourceState,class TargetState,class AllStates>
static bool guard_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
return (fsm.*guard)(evt);
}
};
template<
typename T1
, class Event
, typename T2
, bool (Derived::*guard)(Event const&)
>
struct g_row
{
typedef g_row_tag row_type_tag;
typedef T1 Source;
typedef T2 Target;
typedef Event Evt;
template <class FSM,class SourceState,class TargetState,class AllStates>
static bool guard_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
return (fsm.*guard)(evt);
}
};
// internal transitions
template<
typename T1
, class Event
, void (Derived::*action)(Event const&)
>
struct a_irow
{
typedef a_irow_tag row_type_tag;
typedef T1 Source;
typedef T1 Target;
typedef Event Evt;
template <class FSM,class SourceState,class TargetState,class AllStates>
static ::boost::msm::back::HandledEnum action_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
(fsm.*action)(evt);
return ::boost::msm::back::HANDLED_TRUE;
}
};
template<
typename T1
, class Event
, void (Derived::*action)(Event const&)
, bool (Derived::*guard)(Event const&)
>
struct irow
{
typedef irow_tag row_type_tag;
typedef T1 Source;
typedef T1 Target;
typedef Event Evt;
template <class FSM,class SourceState,class TargetState,class AllStates>
static ::boost::msm::back::HandledEnum action_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
(fsm.*action)(evt);
return ::boost::msm::back::HANDLED_TRUE;
}
template <class FSM,class SourceState,class TargetState,class AllStates>
static bool guard_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
return (fsm.*guard)(evt);
}
};
template<
typename T1
, class Event
, bool (Derived::*guard)(Event const&)
>
struct g_irow
{
typedef g_irow_tag row_type_tag;
typedef T1 Source;
typedef T1 Target;
typedef Event Evt;
template <class FSM,class SourceState,class TargetState,class AllStates>
static bool guard_call(FSM& fsm,Event const& evt,SourceState&,TargetState&,AllStates&)
{
// in this front-end, we don't need to know source and target states
return (fsm.*guard)(evt);
}
};
// internal row withou action or guard. Does nothing except forcing the event to be ignored.
template<
typename T1
, class Event
>
struct _irow
{
typedef _irow_tag row_type_tag;
typedef T1 Source;
typedef T1 Target;
typedef Event Evt;
};
protected:
// Default no-transition handler. Can be replaced in the Derived SM class.
template <class FSM,class Event>
void no_transition(Event const& ,FSM&, int )
{
BOOST_ASSERT(false);
}
// default exception handler. Can be replaced in the Derived SM class.
template <class FSM,class Event>
void exception_caught (Event const&,FSM&,std::exception& )
{
BOOST_ASSERT(false);
}
};
} } }// boost::msm::front
#endif //BOOST_MSM_FRONT_STATEMACHINE_DEF_H
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