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