boost/statechart/exception_translator.hpp

   1 #ifndef BOOST_STATECHART_EXCEPTION_TRANSLATOR_HPP_INCLUDED
   2 #define BOOST_STATECHART_EXCEPTION_TRANSLATOR_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/event.hpp>
  12 #include <boost/statechart/result.hpp>
  13
  14
  15
  16 namespace boost
  17 {
  18 namespace statechart
  19 {
  20
  21
  22
  23 //////////////////////////////////////////////////////////////////////////////
  24 class exception_thrown : public event< exception_thrown > {};
  25
  26
  27
  28 //////////////////////////////////////////////////////////////////////////////
  29 template< class ExceptionEvent = exception_thrown >
  30 class exception_translator
  31 {
  32   public:
  33     //////////////////////////////////////////////////////////////////////////
  34     // The following declarations should be private.
  35     // They are only public because many compilers lack template friends.
  36     //////////////////////////////////////////////////////////////////////////
  37     template< class Action, class ExceptionEventHandler >
  38     result operator()( Action action, ExceptionEventHandler eventHandler )
  39     {
  40       try
  41       {
  42         return action();
  43       }
  44       catch ( ... )
  45       {
  46         return eventHandler( ExceptionEvent() );
  47       }
  48     }
  49 };
  50
  51
  52
  53 } // namespace statechart
  54 } // namespace boost
  55
  56
  57
  58 #endif