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998 lines
32 KiB
998 lines
32 KiB
#ifndef BOOST_STATECHART_SIMPLE_STATE_HPP_INCLUDED |
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#define BOOST_STATECHART_SIMPLE_STATE_HPP_INCLUDED |
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////////////////////////////////////////////////////////////////////////////// |
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// Copyright 2002-2010 Andreas Huber Doenni |
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// Distributed under the Boost Software License, Version 1.0. (See accompany- |
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// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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////////////////////////////////////////////////////////////////////////////// |
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#include <boost/statechart/event.hpp> |
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#include <boost/statechart/detail/leaf_state.hpp> |
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#include <boost/statechart/detail/node_state.hpp> |
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#include <boost/statechart/detail/constructor.hpp> |
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#include <boost/statechart/detail/memory.hpp> |
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#include <boost/mpl/eval_if.hpp> |
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#include <boost/mpl/if.hpp> |
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#include <boost/mpl/identity.hpp> |
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#include <boost/mpl/is_sequence.hpp> |
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#include <boost/mpl/list.hpp> |
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#include <boost/mpl/empty.hpp> |
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#include <boost/mpl/size.hpp> |
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#include <boost/mpl/front.hpp> |
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#include <boost/mpl/at.hpp> |
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#include <boost/mpl/find.hpp> |
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#include <boost/mpl/find_if.hpp> |
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#include <boost/mpl/contains.hpp> |
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#include <boost/mpl/distance.hpp> |
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#include <boost/mpl/deref.hpp> |
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#include <boost/mpl/pop_front.hpp> |
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#include <boost/mpl/push_front.hpp> |
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#include <boost/mpl/clear.hpp> |
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#include <boost/mpl/placeholders.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/integral_c.hpp> |
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#include <boost/mpl/less.hpp> |
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#include <boost/mpl/equal_to.hpp> |
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#include <boost/mpl/not.hpp> |
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#include <boost/mpl/or.hpp> |
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#include <boost/mpl/plus.hpp> |
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#include <boost/mpl/max_element.hpp> |
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#include <boost/mpl/greater.hpp> |
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#include <boost/get_pointer.hpp> |
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#include <boost/intrusive_ptr.hpp> |
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#include <boost/assert.hpp> |
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#include <boost/type_traits/is_base_of.hpp> |
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#include <boost/type_traits/is_same.hpp> |
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#include <boost/static_assert.hpp> |
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#include <boost/cast.hpp> // boost::polymorphic_downcast |
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#include <cstddef> // std::size_t |
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namespace boost |
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{ |
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namespace statechart |
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{ |
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namespace detail |
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{ |
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////////////////////////////////////////////////////////////////////////////// |
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template< class T > |
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struct make_list : public mpl::eval_if< |
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mpl::is_sequence< T >, |
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mpl::identity< T >, |
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mpl::identity< mpl::list< T > > > {}; |
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////////////////////////////////////////////////////////////////////////////// |
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template< class MostDerived, class Context, class InnerInitial > |
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struct simple_state_base_type |
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{ |
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private: |
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typedef typename Context::outermost_context_base_type::allocator_type |
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allocator_type; |
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typedef typename Context::outermost_context_base_type::rtti_policy_type |
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rtti_policy_type; |
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typedef typename detail::make_list< InnerInitial >::type |
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inner_initial_list; |
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typedef typename mpl::size< inner_initial_list >::type |
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inner_initial_list_size; |
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public: |
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typedef typename mpl::eval_if< |
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mpl::empty< inner_initial_list >, |
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mpl::identity< typename rtti_policy_type:: |
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template rtti_derived_type< MostDerived, leaf_state< |
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allocator_type, |
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rtti_policy_type > > >, |
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mpl::identity< typename rtti_policy_type:: |
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template rtti_derived_type< MostDerived, node_state< |
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inner_initial_list_size, |
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allocator_type, |
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rtti_policy_type > > > >::type type; |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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struct no_transition_function |
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{ |
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template< class CommonContext > |
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void operator()( CommonContext & ) const {} |
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}; |
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template< class TransitionContext, class Event > |
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class transition_function |
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{ |
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public: |
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transition_function( |
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void ( TransitionContext::*pTransitionAction )( const Event & ), |
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const Event & evt |
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) : |
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pTransitionAction_( pTransitionAction ), |
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evt_( evt ) |
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{ |
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} |
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template< class CommonContext > |
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void operator()( CommonContext & commonContext ) const |
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{ |
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( commonContext.template context< TransitionContext >() |
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.*pTransitionAction_ )( evt_ ); |
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} |
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private: |
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// avoids C4512 (assignment operator could not be generated) |
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transition_function & operator=( const transition_function & ); |
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void ( TransitionContext::*pTransitionAction_ )( const Event & ); |
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const Event & evt_; |
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}; |
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template< bool contextHasInheritedDeepHistory, bool contextHasDeepHistory > |
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struct deep_history_storer |
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{ |
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template< class HistorizedState, class LeafState, class Context > |
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static void store_deep_history( Context & ) {} |
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}; |
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template<> |
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struct deep_history_storer< true, false > |
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{ |
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template< class HistorizedState, class LeafState, class Context > |
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static void store_deep_history( Context & ctx ) |
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{ |
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ctx.template store_deep_history_impl< LeafState >(); |
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} |
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}; |
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template<> |
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struct deep_history_storer< true, true > |
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{ |
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template< class HistorizedState, class LeafState, class Context > |
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static void store_deep_history( Context & ctx ) |
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{ |
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ctx.outermost_context_base().template store_deep_history< |
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HistorizedState, LeafState >(); |
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ctx.template store_deep_history_impl< LeafState >(); |
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} |
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}; |
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} // namespace detail |
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////////////////////////////////////////////////////////////////////////////// |
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enum history_mode |
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{ |
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has_no_history, |
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has_shallow_history, |
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has_deep_history, |
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has_full_history // shallow & deep |
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}; |
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////////////////////////////////////////////////////////////////////////////// |
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template< class MostDerived, |
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class Context, |
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class InnerInitial = mpl::list<>, |
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history_mode historyMode = has_no_history > |
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class simple_state : public detail::simple_state_base_type< MostDerived, |
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typename Context::inner_context_type, InnerInitial >::type |
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{ |
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typedef typename detail::simple_state_base_type< |
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MostDerived, typename Context::inner_context_type, |
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InnerInitial >::type base_type; |
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public: |
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////////////////////////////////////////////////////////////////////////// |
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typedef mpl::list<> reactions; |
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typedef typename Context::inner_context_type context_type; |
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template< detail::orthogonal_position_type innerOrthogonalPosition > |
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struct orthogonal |
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{ |
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typedef mpl::integral_c< |
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detail::orthogonal_position_type, |
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innerOrthogonalPosition > inner_orthogonal_position; |
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typedef MostDerived inner_context_type; |
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}; |
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typedef typename context_type::outermost_context_type |
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outermost_context_type; |
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outermost_context_type & outermost_context() |
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{ |
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// This assert fails when an attempt is made to access the state machine |
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// from a constructor of a state that is *not* a subtype of state<>. |
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// To correct this, derive from state<> instead of simple_state<>. |
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BOOST_ASSERT( get_pointer( pContext_ ) != 0 ); |
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return pContext_->outermost_context(); |
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} |
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const outermost_context_type & outermost_context() const |
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{ |
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// This assert fails when an attempt is made to access the state machine |
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// from a constructor of a state that is *not* a subtype of state<>. |
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// To correct this, derive from state<> instead of simple_state<>. |
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BOOST_ASSERT( get_pointer( pContext_ ) != 0 ); |
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return pContext_->outermost_context(); |
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} |
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template< class OtherContext > |
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OtherContext & context() |
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{ |
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typedef typename mpl::if_< |
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is_base_of< OtherContext, MostDerived >, |
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context_impl_this_context, |
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context_impl_other_context |
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>::type impl; |
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return impl::template context_impl< OtherContext >( *this ); |
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} |
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template< class OtherContext > |
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const OtherContext & context() const |
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{ |
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typedef typename mpl::if_< |
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is_base_of< OtherContext, MostDerived >, |
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context_impl_this_context, |
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context_impl_other_context |
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>::type impl; |
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return impl::template context_impl< OtherContext >( *this ); |
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} |
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template< class Target > |
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Target state_cast() const |
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{ |
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return outermost_context_base().template state_cast< Target >(); |
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} |
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template< class Target > |
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Target state_downcast() const |
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{ |
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return outermost_context_base().template state_downcast< Target >(); |
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} |
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typedef typename context_type::state_base_type state_base_type; |
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typedef typename context_type::state_iterator state_iterator; |
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state_iterator state_begin() const |
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{ |
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return outermost_context_base().state_begin(); |
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} |
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state_iterator state_end() const |
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{ |
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return outermost_context_base().state_end(); |
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} |
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typedef typename context_type::event_base_ptr_type event_base_ptr_type; |
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void post_event( const event_base_ptr_type & pEvent ) |
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{ |
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outermost_context_base().post_event_impl( pEvent ); |
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} |
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void post_event( const event_base & evt ) |
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{ |
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outermost_context_base().post_event_impl( evt ); |
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} |
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result discard_event() |
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{ |
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return detail::result_utility::make_result( detail::do_discard_event ); |
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} |
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result forward_event() |
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{ |
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return detail::result_utility::make_result( detail::do_forward_event ); |
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} |
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result defer_event() |
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{ |
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this->state_base_type::defer_event(); |
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return detail::result_utility::make_result( detail::do_defer_event ); |
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} |
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template< class DestinationState > |
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result transit() |
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{ |
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return transit_impl< DestinationState, outermost_context_type >( |
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detail::no_transition_function() ); |
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} |
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template< class DestinationState, class TransitionContext, class Event > |
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result transit( |
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void ( TransitionContext::*pTransitionAction )( const Event & ), |
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const Event & evt ) |
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{ |
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return transit_impl< DestinationState, TransitionContext >( |
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detail::transition_function< TransitionContext, Event >( |
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pTransitionAction, evt ) ); |
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} |
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result terminate() |
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{ |
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outermost_context_base().terminate_as_reaction( *this ); |
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return detail::result_utility::make_result( detail::do_discard_event ); |
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} |
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template< |
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class HistoryContext, |
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detail::orthogonal_position_type orthogonalPosition > |
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void clear_shallow_history() |
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{ |
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outermost_context_base().template clear_shallow_history< |
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HistoryContext, orthogonalPosition >(); |
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} |
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template< |
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class HistoryContext, |
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detail::orthogonal_position_type orthogonalPosition > |
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void clear_deep_history() |
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{ |
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outermost_context_base().template clear_deep_history< |
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HistoryContext, orthogonalPosition >(); |
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} |
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const event_base * triggering_event() const |
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{ |
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return outermost_context_base().triggering_event(); |
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} |
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protected: |
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////////////////////////////////////////////////////////////////////////// |
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simple_state() : pContext_( 0 ) {} |
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~simple_state() |
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{ |
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// As a result of a throwing derived class constructor, this destructor |
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// can be called before the context is set. |
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if ( get_pointer( pContext_ ) != 0 ) |
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{ |
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if ( this->deferred_events() ) |
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{ |
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outermost_context_base().release_events(); |
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} |
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pContext_->remove_inner_state( orthogonal_position::value ); |
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} |
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} |
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public: |
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////////////////////////////////////////////////////////////////////////// |
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// The following declarations should be private. |
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// They are only public because many compilers lack template friends. |
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////////////////////////////////////////////////////////////////////////// |
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typedef typename Context::inner_orthogonal_position orthogonal_position; |
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// If you receive a |
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// "use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>'" or similar |
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// compiler error here then either this state resides in a non-existent |
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// orthogonal region of the outer state or the outer state does not have |
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// inner states. |
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BOOST_STATIC_ASSERT( ( mpl::less< |
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orthogonal_position, |
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typename context_type::no_of_orthogonal_regions >::value ) ); |
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typedef MostDerived inner_context_type; |
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typedef mpl::integral_c< detail::orthogonal_position_type, 0 > |
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inner_orthogonal_position; |
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typedef typename context_type::event_base_type event_base_type; |
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typedef typename context_type::rtti_policy_type rtti_policy_type; |
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typedef typename context_type::outermost_context_base_type |
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outermost_context_base_type; |
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typedef typename context_type::inner_context_ptr_type context_ptr_type; |
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typedef typename context_type::state_list_type state_list_type; |
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typedef intrusive_ptr< inner_context_type > inner_context_ptr_type; |
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typedef typename detail::make_list< InnerInitial >::type |
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inner_initial_list; |
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typedef typename mpl::size< inner_initial_list >::type |
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inner_initial_list_size; |
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typedef mpl::integral_c< |
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detail::orthogonal_position_type, |
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inner_initial_list_size::value > no_of_orthogonal_regions; |
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typedef typename mpl::push_front< |
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typename context_type::context_type_list, |
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context_type >::type context_type_list; |
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// If you receive a |
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// "use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>'" or similar |
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// compiler error here then the direct or indirect context of this state |
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// has deep history _and_ this state has two or more orthogonal regions. |
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// Boost.Statechart does not currently support deep history in a state whose |
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// direct or indirect inner states have two or more orthogonal regions. |
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// Please consult the documentation on how to work around this limitation. |
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BOOST_STATIC_ASSERT( ( mpl::or_< |
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mpl::less< |
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no_of_orthogonal_regions, |
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mpl::integral_c< detail::orthogonal_position_type, 2 > >, |
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mpl::not_< |
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typename context_type::inherited_deep_history > >::value ) ); |
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typedef mpl::bool_< ( historyMode & has_shallow_history ) != 0 > |
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shallow_history; |
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typedef typename context_type::shallow_history stores_shallow_history; |
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typedef mpl::bool_< ( historyMode & has_deep_history ) != 0 > |
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deep_history; |
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typedef typename mpl::or_< |
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deep_history, |
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typename context_type::inherited_deep_history |
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>::type inherited_deep_history; |
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typedef typename mpl::and_< |
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inherited_deep_history, |
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mpl::empty< inner_initial_list > >::type stores_deep_history; |
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void * operator new( std::size_t size ) |
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{ |
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return detail::allocate< MostDerived, |
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typename outermost_context_type::allocator_type >( size ); |
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} |
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void operator delete( void * pState ) |
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{ |
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detail::deallocate< MostDerived, |
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typename outermost_context_type::allocator_type >( pState ); |
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} |
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outermost_context_base_type & outermost_context_base() |
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{ |
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// This assert fails when an attempt is made to access the state machine |
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// from a constructor of a state that is *not* a subtype of state<>. |
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// To correct this, derive from state<> instead of simple_state<>. |
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BOOST_ASSERT( get_pointer( pContext_ ) != 0 ); |
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return pContext_->outermost_context_base(); |
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} |
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const outermost_context_base_type & outermost_context_base() const |
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{ |
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// This assert fails when an attempt is made to access the state machine |
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// from a constructor of a state that is *not* a subtype of state<>. |
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// To correct this, derive from state<> instead of simple_state<>. |
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BOOST_ASSERT( get_pointer( pContext_ ) != 0 ); |
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return pContext_->outermost_context_base(); |
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} |
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virtual const state_base_type * outer_state_ptr() const |
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{ |
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typedef typename mpl::if_< |
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is_same< outermost_context_type, context_type >, |
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outer_state_ptr_impl_outermost, |
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outer_state_ptr_impl_non_outermost |
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>::type impl; |
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return impl::outer_state_ptr_impl( *this ); |
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} |
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virtual detail::reaction_result react_impl( |
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const event_base_type & evt, |
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typename rtti_policy_type::id_type eventType ) |
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{ |
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typedef typename detail::make_list< |
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typename MostDerived::reactions >::type reaction_list; |
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detail::reaction_result reactionResult = |
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local_react< reaction_list >( evt, eventType ); |
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// At this point we can only safely access pContext_ if the handler did |
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// not return do_discard_event! |
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if ( reactionResult == detail::do_forward_event ) |
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{ |
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// TODO: The following call to react_impl of our outer state should |
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// be made with a context_type:: prefix to call directly instead of |
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// virtually. For some reason the compiler complains... |
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reactionResult = pContext_->react_impl( evt, eventType ); |
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} |
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return reactionResult; |
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} |
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virtual void exit_impl( |
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typename base_type::direct_state_base_ptr_type & pSelf, |
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typename state_base_type::node_state_base_ptr_type & |
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pOutermostUnstableState, |
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bool performFullExit ) |
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{ |
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inner_context_ptr_type pMostDerivedSelf = |
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polymorphic_downcast< MostDerived * >( this ); |
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pSelf = 0; |
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exit_impl( pMostDerivedSelf, pOutermostUnstableState, performFullExit ); |
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} |
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void exit_impl( |
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inner_context_ptr_type & pSelf, |
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typename state_base_type::node_state_base_ptr_type & |
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pOutermostUnstableState, |
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bool performFullExit ) |
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{ |
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switch ( this->ref_count() ) |
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{ |
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case 2: |
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if ( get_pointer( pOutermostUnstableState ) == |
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static_cast< state_base_type * >( this ) ) |
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{ |
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pContext_->set_outermost_unstable_state( |
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pOutermostUnstableState ); |
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// fall through to next case intended |
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} |
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else |
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{ |
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break; |
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} |
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case 1: |
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{ |
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if ( get_pointer( pOutermostUnstableState ) == 0 ) |
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{ |
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pContext_->set_outermost_unstable_state( |
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pOutermostUnstableState ); |
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} |
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if ( performFullExit ) |
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{ |
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pSelf->exit(); |
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check_store_shallow_history< stores_shallow_history >(); |
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check_store_deep_history< stores_deep_history >(); |
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} |
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context_ptr_type pContext = pContext_; |
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pSelf = 0; |
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pContext->exit_impl( |
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pContext, pOutermostUnstableState, performFullExit ); |
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break; |
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} |
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default: |
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break; |
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} |
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} |
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void set_outermost_unstable_state( |
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typename state_base_type::node_state_base_ptr_type & |
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pOutermostUnstableState ) |
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{ |
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pOutermostUnstableState = this; |
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} |
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template< class OtherContext > |
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const typename OtherContext::inner_context_ptr_type & context_ptr() const |
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{ |
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typedef typename mpl::if_< |
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is_same< OtherContext, context_type >, |
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context_ptr_impl_my_context, |
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context_ptr_impl_other_context |
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>::type impl; |
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return impl::template context_ptr_impl< OtherContext >( *this ); |
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} |
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static void initial_deep_construct( |
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outermost_context_base_type & outermostContextBase ) |
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{ |
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deep_construct( &outermostContextBase, outermostContextBase ); |
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} |
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static void deep_construct( |
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const context_ptr_type & pContext, |
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outermost_context_base_type & outermostContextBase ) |
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{ |
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const inner_context_ptr_type pInnerContext( |
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shallow_construct( pContext, outermostContextBase ) ); |
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deep_construct_inner< inner_initial_list >( |
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pInnerContext, outermostContextBase ); |
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} |
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static inner_context_ptr_type shallow_construct( |
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const context_ptr_type & pContext, |
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outermost_context_base_type & outermostContextBase ) |
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{ |
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const inner_context_ptr_type pInnerContext( new MostDerived ); |
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pInnerContext->set_context( pContext ); |
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outermostContextBase.add( pInnerContext ); |
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return pInnerContext; |
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} |
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void set_context( const context_ptr_type & pContext ) |
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{ |
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BOOST_ASSERT( get_pointer( pContext ) != 0 ); |
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pContext_ = pContext; |
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base_type::set_context( |
|
orthogonal_position::value, get_pointer( pContext ) ); |
|
} |
|
|
|
template< class InnerList > |
|
static void deep_construct_inner( |
|
const inner_context_ptr_type & pInnerContext, |
|
outermost_context_base_type & outermostContextBase ) |
|
{ |
|
typedef typename mpl::if_< |
|
mpl::empty< InnerList >, |
|
deep_construct_inner_impl_empty, |
|
deep_construct_inner_impl_non_empty |
|
>::type impl; |
|
impl::template deep_construct_inner_impl< InnerList >( |
|
pInnerContext, outermostContextBase ); |
|
} |
|
|
|
template< class LeafState > |
|
void store_deep_history_impl() |
|
{ |
|
detail::deep_history_storer< |
|
context_type::inherited_deep_history::value, |
|
context_type::deep_history::value |
|
>::template store_deep_history< MostDerived, LeafState >( |
|
*pContext_ ); |
|
} |
|
|
|
private: |
|
////////////////////////////////////////////////////////////////////////// |
|
struct context_ptr_impl_other_context |
|
{ |
|
template< class OtherContext, class State > |
|
static const typename OtherContext::inner_context_ptr_type & |
|
context_ptr_impl( const State & stt ) |
|
{ |
|
// This assert fails when an attempt is made to access an outer |
|
// context from a constructor of a state that is *not* a subtype of |
|
// state<>. To correct this, derive from state<> instead of |
|
// simple_state<>. |
|
BOOST_ASSERT( get_pointer( stt.pContext_ ) != 0 ); |
|
return stt.pContext_->template context_ptr< OtherContext >(); |
|
} |
|
}; |
|
friend struct context_ptr_impl_other_context; |
|
|
|
struct context_ptr_impl_my_context |
|
{ |
|
template< class OtherContext, class State > |
|
static const typename OtherContext::inner_context_ptr_type & |
|
context_ptr_impl( const State & stt ) |
|
{ |
|
// This assert fails when an attempt is made to access an outer |
|
// context from a constructor of a state that is *not* a subtype of |
|
// state<>. To correct this, derive from state<> instead of |
|
// simple_state<>. |
|
BOOST_ASSERT( get_pointer( stt.pContext_ ) != 0 ); |
|
return stt.pContext_; |
|
} |
|
}; |
|
friend struct context_ptr_impl_my_context; |
|
|
|
struct context_impl_other_context |
|
{ |
|
template< class OtherContext, class State > |
|
static OtherContext & context_impl( State & stt ) |
|
{ |
|
// This assert fails when an attempt is made to access an outer |
|
// context from a constructor of a state that is *not* a subtype of |
|
// state<>. To correct this, derive from state<> instead of |
|
// simple_state<>. |
|
BOOST_ASSERT( get_pointer( stt.pContext_ ) != 0 ); |
|
return stt.pContext_->template context< OtherContext >(); |
|
} |
|
}; |
|
friend struct context_impl_other_context; |
|
|
|
struct context_impl_this_context |
|
{ |
|
template< class OtherContext, class State > |
|
static OtherContext & context_impl( State & stt ) |
|
{ |
|
return *polymorphic_downcast< MostDerived * >( &stt ); |
|
} |
|
}; |
|
friend struct context_impl_this_context; |
|
|
|
template< class DestinationState, |
|
class TransitionContext, |
|
class TransitionAction > |
|
result transit_impl( const TransitionAction & transitionAction ) |
|
{ |
|
typedef typename mpl::find_if< |
|
context_type_list, |
|
mpl::contains< |
|
typename DestinationState::context_type_list, |
|
mpl::placeholders::_ > >::type common_context_iter; |
|
typedef typename mpl::deref< common_context_iter >::type |
|
common_context_type; |
|
typedef typename mpl::distance< |
|
typename mpl::begin< context_type_list >::type, |
|
common_context_iter >::type termination_state_position; |
|
typedef typename mpl::push_front< context_type_list, MostDerived >::type |
|
possible_transition_contexts; |
|
typedef typename mpl::at< |
|
possible_transition_contexts, |
|
termination_state_position >::type termination_state_type; |
|
|
|
termination_state_type & terminationState( |
|
context< termination_state_type >() ); |
|
const typename |
|
common_context_type::inner_context_ptr_type pCommonContext( |
|
terminationState.template context_ptr< common_context_type >() ); |
|
outermost_context_base_type & outermostContextBase( |
|
pCommonContext->outermost_context_base() ); |
|
|
|
#ifdef BOOST_STATECHART_RELAX_TRANSITION_CONTEXT |
|
typedef typename mpl::distance< |
|
typename mpl::begin< possible_transition_contexts >::type, |
|
typename mpl::find< |
|
possible_transition_contexts, TransitionContext >::type |
|
>::type proposed_transition_context_position; |
|
|
|
typedef typename mpl::plus< |
|
termination_state_position, |
|
mpl::long_< 1 > |
|
>::type uml_transition_context_position; |
|
|
|
typedef typename mpl::deref< typename mpl::max_element< |
|
mpl::list< |
|
proposed_transition_context_position, |
|
uml_transition_context_position >, |
|
mpl::greater< mpl::placeholders::_, mpl::placeholders::_ > |
|
>::type >::type real_transition_context_position; |
|
|
|
typedef typename mpl::at< |
|
possible_transition_contexts, |
|
real_transition_context_position >::type real_transition_context_type; |
|
|
|
#ifdef BOOST_MSVC |
|
# pragma warning( push ) |
|
# pragma warning( disable: 4127 ) // conditional expression is constant |
|
#endif |
|
if ( ( proposed_transition_context_position::value == 0 ) && |
|
( inner_initial_list_size::value == 0 ) ) |
|
{ |
|
transitionAction( *polymorphic_downcast< MostDerived * >( this ) ); |
|
outermostContextBase.terminate_as_part_of_transit( terminationState ); |
|
} |
|
else if ( proposed_transition_context_position::value >= |
|
uml_transition_context_position::value ) |
|
{ |
|
real_transition_context_type & transitionContext = |
|
context< real_transition_context_type >(); |
|
outermostContextBase.terminate_as_part_of_transit( terminationState ); |
|
transitionAction( transitionContext ); |
|
} |
|
else |
|
{ |
|
typename real_transition_context_type::inner_context_ptr_type |
|
pTransitionContext = context_ptr< real_transition_context_type >(); |
|
outermostContextBase.terminate_as_part_of_transit( |
|
*pTransitionContext ); |
|
transitionAction( *pTransitionContext ); |
|
pTransitionContext = 0; |
|
outermostContextBase.terminate_as_part_of_transit( terminationState ); |
|
} |
|
#ifdef BOOST_MSVC |
|
# pragma warning( pop ) |
|
#endif |
|
#else |
|
outermostContextBase.terminate_as_part_of_transit( terminationState ); |
|
transitionAction( *pCommonContext ); |
|
#endif |
|
|
|
typedef typename detail::make_context_list< |
|
common_context_type, DestinationState >::type context_list_type; |
|
|
|
// If you receive a |
|
// "use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>'" or |
|
// similar compiler error here then you tried to make an invalid |
|
// transition between different orthogonal regions. |
|
BOOST_STATIC_ASSERT( ( mpl::equal_to< |
|
typename termination_state_type::orthogonal_position, |
|
typename mpl::front< context_list_type >::type::orthogonal_position |
|
>::value ) ); |
|
|
|
detail::constructor< |
|
context_list_type, outermost_context_base_type >::construct( |
|
pCommonContext, outermostContextBase ); |
|
|
|
return detail::result_utility::make_result( detail::do_discard_event ); |
|
} |
|
|
|
struct local_react_impl_non_empty |
|
{ |
|
template< class ReactionList, class State > |
|
static detail::reaction_result local_react_impl( |
|
State & stt, |
|
const event_base_type & evt, |
|
typename rtti_policy_type::id_type eventType ) |
|
{ |
|
detail::reaction_result reactionResult = |
|
mpl::front< ReactionList >::type::react( |
|
*polymorphic_downcast< MostDerived * >( &stt ), |
|
evt, eventType ); |
|
|
|
if ( reactionResult == detail::no_reaction ) |
|
{ |
|
reactionResult = stt.template local_react< |
|
typename mpl::pop_front< ReactionList >::type >( |
|
evt, eventType ); |
|
} |
|
|
|
return reactionResult; |
|
} |
|
}; |
|
friend struct local_react_impl_non_empty; |
|
|
|
struct local_react_impl_empty |
|
{ |
|
template< class ReactionList, class State > |
|
static detail::reaction_result local_react_impl( |
|
State &, const event_base_type &, typename rtti_policy_type::id_type ) |
|
{ |
|
return detail::do_forward_event; |
|
} |
|
}; |
|
|
|
template< class ReactionList > |
|
detail::reaction_result local_react( |
|
const event_base_type & evt, |
|
typename rtti_policy_type::id_type eventType ) |
|
{ |
|
typedef typename mpl::if_< |
|
mpl::empty< ReactionList >, |
|
local_react_impl_empty, |
|
local_react_impl_non_empty |
|
>::type impl; |
|
return impl::template local_react_impl< ReactionList >( |
|
*this, evt, eventType ); |
|
} |
|
|
|
struct outer_state_ptr_impl_non_outermost |
|
{ |
|
template< class State > |
|
static const state_base_type * outer_state_ptr_impl( const State & stt ) |
|
{ |
|
return get_pointer( stt.pContext_ ); |
|
} |
|
}; |
|
friend struct outer_state_ptr_impl_non_outermost; |
|
|
|
struct outer_state_ptr_impl_outermost |
|
{ |
|
template< class State > |
|
static const state_base_type * outer_state_ptr_impl( const State & ) |
|
{ |
|
return 0; |
|
} |
|
}; |
|
|
|
struct deep_construct_inner_impl_non_empty |
|
{ |
|
template< class InnerList > |
|
static void deep_construct_inner_impl( |
|
const inner_context_ptr_type & pInnerContext, |
|
outermost_context_base_type & outermostContextBase ) |
|
{ |
|
typedef typename mpl::front< InnerList >::type current_inner; |
|
|
|
// If you receive a |
|
// "use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>'" or |
|
// similar compiler error here then there is a mismatch between the |
|
// orthogonal position of a state and its position in the inner |
|
// initial list of its outer state. |
|
BOOST_STATIC_ASSERT( ( is_same< |
|
current_inner, |
|
typename mpl::at< |
|
typename current_inner::context_type::inner_initial_list, |
|
typename current_inner::orthogonal_position >::type >::value ) ); |
|
|
|
current_inner::deep_construct( pInnerContext, outermostContextBase ); |
|
deep_construct_inner< typename mpl::pop_front< InnerList >::type >( |
|
pInnerContext, outermostContextBase ); |
|
} |
|
}; |
|
|
|
struct deep_construct_inner_impl_empty |
|
{ |
|
template< class InnerList > |
|
static void deep_construct_inner_impl( |
|
const inner_context_ptr_type &, outermost_context_base_type & ) {} |
|
}; |
|
|
|
struct check_store_shallow_history_impl_no |
|
{ |
|
template< class State > |
|
static void check_store_shallow_history_impl( State & ) {} |
|
}; |
|
|
|
struct check_store_shallow_history_impl_yes |
|
{ |
|
template< class State > |
|
static void check_store_shallow_history_impl( State & stt ) |
|
{ |
|
stt.outermost_context_base().template store_shallow_history< |
|
MostDerived >(); |
|
} |
|
}; |
|
friend struct check_store_shallow_history_impl_yes; |
|
|
|
template< class StoreShallowHistory > |
|
void check_store_shallow_history() |
|
{ |
|
typedef typename mpl::if_< |
|
StoreShallowHistory, |
|
check_store_shallow_history_impl_yes, |
|
check_store_shallow_history_impl_no |
|
>::type impl; |
|
impl::check_store_shallow_history_impl( *this ); |
|
} |
|
|
|
struct check_store_deep_history_impl_no |
|
{ |
|
template< class State > |
|
static void check_store_deep_history_impl( State & ) {} |
|
}; |
|
|
|
struct check_store_deep_history_impl_yes |
|
{ |
|
template< class State > |
|
static void check_store_deep_history_impl( State & stt ) |
|
{ |
|
stt.template store_deep_history_impl< MostDerived >(); |
|
} |
|
}; |
|
friend struct check_store_deep_history_impl_yes; |
|
|
|
template< class StoreDeepHistory > |
|
void check_store_deep_history() |
|
{ |
|
typedef typename mpl::if_< |
|
StoreDeepHistory, |
|
check_store_deep_history_impl_yes, |
|
check_store_deep_history_impl_no |
|
>::type impl; |
|
impl::check_store_deep_history_impl( *this ); |
|
} |
|
|
|
|
|
context_ptr_type pContext_; |
|
}; |
|
|
|
|
|
|
|
#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP |
|
} // namespace statechart |
|
#endif |
|
|
|
|
|
|
|
template< class MostDerived, class Context, |
|
class InnerInitial, history_mode historyMode > |
|
inline void intrusive_ptr_release( const ::boost::statechart::simple_state< |
|
MostDerived, Context, InnerInitial, historyMode > * pBase ) |
|
{ |
|
if ( pBase->release() ) |
|
{ |
|
// The cast is necessary because the simple_state destructor is non- |
|
// virtual (and inaccessible from this context) |
|
delete polymorphic_downcast< const MostDerived * >( pBase ); |
|
} |
|
} |
|
|
|
|
|
|
|
#ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP |
|
} // namespace statechart |
|
#endif |
|
|
|
|
|
|
|
} // namespace boost |
|
|
|
|
|
|
|
#endif
|
|
|