boost/statechart/exception_translator.hpp

0001 #ifndef BOOST_STATECHART_EXCEPTION_TRANSLATOR_HPP_INCLUDED
0002 #define BOOST_STATECHART_EXCEPTION_TRANSLATOR_HPP_INCLUDED
0003 //////////////////////////////////////////////////////////////////////////////
0004 // Copyright 2002-2006 Andreas Huber Doenni
0005 // Distributed under the Boost Software License, Version 1.0. (See accompany-
0006 // ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0007 //////////////////////////////////////////////////////////////////////////////
0008
0009
0010
0011 #include <boost/statechart/event.hpp>
0012 #include <boost/statechart/result.hpp>
0013
0014
0015
0016 namespace boost
0017 {
0018 namespace statechart
0019 {
0020
0021
0022
0023 //////////////////////////////////////////////////////////////////////////////
0024 class exception_thrown : public event< exception_thrown > {};
0025
0026
0027
0028 //////////////////////////////////////////////////////////////////////////////
0029 template< class ExceptionEvent = exception_thrown >
0030 class exception_translator
0031 {
0032   public:
0033     //////////////////////////////////////////////////////////////////////////
0034     // The following declarations should be private.
0035     // They are only public because many compilers lack template friends.
0036     //////////////////////////////////////////////////////////////////////////
0037     template< class Action, class ExceptionEventHandler >
0038     result operator()( Action action, ExceptionEventHandler eventHandler )
0039     {
0040       try
0041       {
0042         return action();
0043       }
0044       catch ( ... )
0045       {
0046         return eventHandler( ExceptionEvent() );
0047       }
0048     }
0049 };
0050
0051
0052
0053 } // namespace statechart
0054 } // namespace boost
0055
0056
0057
0058 #endif