comparison DEPENDENCIES/generic/include/boost/statechart/detail/reaction_dispatcher.hpp @ 16:2665513ce2d3

Add boost headers

+#ifndef BOOST_STATECHART_REACTION_DISPATCHER_HPP_INCLUDED
+#define BOOST_STATECHART_REACTION_DISPATCHER_HPP_INCLUDED
+//////////////////////////////////////////////////////////////////////////////
+// Copyright 2008 Andreas Huber Doenni
+// Distributed under the Boost Software License, Version 1.0. (See accompany-
+// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//////////////////////////////////////////////////////////////////////////////
+
+
+
+#include <boost/statechart/result.hpp>
+
+#include <boost/mpl/if.hpp>
+
+#include <boost/cast.hpp> // boost::polymorphic_downcast
+#include <boost/type_traits/is_same.hpp>
+
+
+
+namespace boost
+{
+namespace statechart
+{
+namespace detail
+{
+
+
+
+//////////////////////////////////////////////////////////////////////////////
+template< class Event >
+struct no_context
+{
+  void no_function( const Event & );
+};
+
+//////////////////////////////////////////////////////////////////////////////
+template<
+  class Reactions, class State, class EventBase, class Event,
+  class ActionContext, class IdType >
+class reaction_dispatcher
+{
+  private:
+    struct without_action
+    {
+      static result react( State & stt, const EventBase & )
+      {
+        return Reactions::react_without_action( stt );
+      }
+    };
+
+    struct base_with_action
+    {
+      static result react( State & stt, const EventBase & evt )
+      {
+        return Reactions::react_with_action( stt, evt );
+      }
+    };
+
+    struct base
+    {
+      static result react(
+        State & stt, const EventBase & evt, const IdType & )
+      {
+        typedef typename mpl::if_<
+          is_same< ActionContext, detail::no_context< Event > >,
+          without_action, base_with_action
+        >::type reaction;
+        return reaction::react( stt, evt );
+      }
+    };
+
+    struct derived_with_action
+    {
+      static result react( State & stt, const EventBase & evt )
+      {
+        return Reactions::react_with_action(
+          stt, *polymorphic_downcast< const Event * >( &evt ) );
+      }
+    };
+
+    struct derived
+    {
+      static result react(
+        State & stt, const EventBase & evt, const IdType & eventType )
+      {
+        if ( eventType == Event::static_type() )
+        {
+          typedef typename mpl::if_<
+            is_same< ActionContext, detail::no_context< Event > >,
+            without_action, derived_with_action
+          >::type reaction;
+          return reaction::react( stt, evt );
+        }
+        else
+        {
+          return detail::result_utility::make_result( detail::no_reaction );
+        }
+      }
+    };
+
+  public:
+    static reaction_result react(
+      State & stt, const EventBase & evt, const IdType & eventType )
+    {
+      typedef typename mpl::if_<
+        is_same< Event, EventBase >, base, derived
+      >::type reaction;
+      return result_utility::get_result(
+        reaction::react( stt, evt, eventType ) );
+    }
+};
+
+
+
+} // namespace detail
+} // namespace statechart
+} // namespace boost
+
+
+
+#endif