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77 lines
2.8 KiB
77 lines
2.8 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_DETAILS_COMMON_STATES_H |
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#define BOOST_MSM_FRONT_DETAILS_COMMON_STATES_H |
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#include <boost/mpl/int.hpp> |
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#include <boost/mpl/vector.hpp> |
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#include <boost/fusion/container/map.hpp> |
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#include <boost/fusion/include/at_key.hpp> |
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#include <boost/type_traits/add_const.hpp> |
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namespace boost { namespace msm { namespace front {namespace detail |
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{ |
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template <class Attributes= ::boost::fusion::map<> > |
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struct inherit_attributes |
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{ |
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inherit_attributes():m_attributes(){} |
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inherit_attributes(Attributes const& the_attributes):m_attributes(the_attributes){} |
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// on the fly attribute creation capability |
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typedef Attributes attributes_type; |
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template <class Index> |
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typename ::boost::fusion::result_of::at_key<attributes_type, |
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Index>::type |
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get_attribute(Index const&) |
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{ |
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return ::boost::fusion::at_key<Index>(m_attributes); |
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} |
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template <class Index> |
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typename ::boost::add_const< |
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typename ::boost::fusion::result_of::at_key<attributes_type, |
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Index>::type>::type |
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get_attribute(Index const&)const |
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{ |
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return const_cast< |
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typename ::boost::add_const< |
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typename ::boost::fusion::result_of::at_key< attributes_type, |
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Index >::type>::type> |
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(::boost::fusion::at_key<Index>(m_attributes)); |
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} |
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private: |
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// attributes |
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Attributes m_attributes; |
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}; |
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// the interface for all states. Defines entry and exit functions. Overwrite to implement for any state needing it. |
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template<class USERBASE,class Attributes= ::boost::fusion::map<> > |
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struct state_base : public inherit_attributes<Attributes>, USERBASE |
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{ |
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typedef USERBASE user_state_base; |
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typedef Attributes attributes_type; |
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// empty implementation for the states not wishing to define an entry condition |
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// will not be called polymorphic way |
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template <class Event,class FSM> |
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void on_entry(Event const& ,FSM&){} |
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template <class Event,class FSM> |
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void on_exit(Event const&,FSM& ){} |
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// default (empty) transition table; |
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typedef ::boost::mpl::vector0<> internal_transition_table; |
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typedef ::boost::mpl::vector0<> transition_table; |
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}; |
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}}}} |
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#endif //BOOST_MSM_FRONT_DETAILS_COMMON_STATES_H |
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