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 >
operator ()(Action action,ExceptionEventHandler eventHandler)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
59