boost/statechart/state.hpp

   1 #ifndef BOOST_STATECHART_STATE_HPP_INCLUDED
   2 #define BOOST_STATECHART_STATE_HPP_INCLUDED
   3 //////////////////////////////////////////////////////////////////////////////
   4 // Copyright 2002-2006 Andreas Huber Doenni
   5 // Distributed under the Boost Software License, Version 1.0. (See accompany-
   6 // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 //////////////////////////////////////////////////////////////////////////////
   8
   9
  10
  11 #include <boost/statechart/simple_state.hpp>
  12
  13 #include <boost/mpl/list.hpp>
  14
  15
  16
  17 namespace boost
  18 {
  19 namespace statechart
  20 {
  21
  22
  23
  24 template< class MostDerived,
  25           class Context,
  26           class InnerInitial = mpl::list<>,
  27           history_mode historyMode = has_no_history >
  28 class state : public simple_state<
  29   MostDerived, Context, InnerInitial, historyMode >
  30 {
  31   typedef simple_state< MostDerived, Context, InnerInitial, historyMode >
  32     base_type;
  33
  34   protected:
  35     //////////////////////////////////////////////////////////////////////////
  36     struct my_context
  37     {
  38       my_context( typename base_type::context_ptr_type pContext ) :
  39         pContext_( pContext )
  40       {
  41       }
  42
  43       typename base_type::context_ptr_type pContext_;
  44     };
  45
  46     typedef state my_base;
  47
  48     state( my_context ctx )
  49     {
  50       this->set_context( ctx.pContext_ );
  51     }
  52
  53     ~state() {}
  54
  55   public:
  56     //////////////////////////////////////////////////////////////////////////
  57     // The following declarations should be private.
  58     // They are only public because many compilers lack template friends.
  59     //////////////////////////////////////////////////////////////////////////
  60     // See base class for documentation
  61     typedef typename base_type::outermost_context_base_type
  62       outermost_context_base_type;
  63     typedef typename base_type::inner_context_ptr_type inner_context_ptr_type;
  64     typedef typename base_type::context_ptr_type context_ptr_type;
  65     typedef typename base_type::inner_initial_list inner_initial_list;
  66
  67     static void initial_deep_construct(
  68       outermost_context_base_type & outermostContextBase )
  69     {
  70       deep_construct( &outermostContextBase, outermostContextBase );
  71     }
  72
  73     // See base class for documentation
  74     static void deep_construct(
  75       const context_ptr_type & pContext,
  76       outermost_context_base_type & outermostContextBase )
  77     {
  78       const inner_context_ptr_type pInnerContext(
  79         shallow_construct( pContext, outermostContextBase ) );
  80       base_type::template deep_construct_inner< inner_initial_list >(
  81         pInnerContext, outermostContextBase );
  82     }
  83
  84     static inner_context_ptr_type shallow_construct(
  85       const context_ptr_type & pContext,
  86       outermost_context_base_type & outermostContextBase )
  87     {
  88       const inner_context_ptr_type pInnerContext(
  89         new MostDerived( my_context( pContext ) ) );
  90       outermostContextBase.add( pInnerContext );
  91       return pInnerContext;
  92     }
  93 };
  94
  95
  96
  97 } // namespace statechart
  98 } // namespace boost
  99
 100
 101
 102 #endif