Re: [boost] Exception catching in execution_monitor.cpp

From: David Abrahams (dave_at_[hidden])
Date: 2003-02-14 12:32:53

"Rozental, Gennadiy" <gennadiy.rozental_at_[hidden]> writes:

>> I've encountered a problem with exceptions in boost/test:
>> Our project uses a base class for all our exceptions which 
>> cannot derive 
>> from std::exception.
>> 
>> If such an exception is thrown, the message:
>>         Exception in "...": unknown type
>> is printed out, which is not very helpful in locating the problem.
>> 
>> Is there a way to specify an "exception handler", which can 
>> catch "our" 
>> exceptions and print something more useful?.
>
> I could do something along following lines:
>
> #include <iostream>
> using namespace std;
>
> void
> unknown_exception_handler()
> {
>     try {
>         throw;
>     }
>     catch( int i ) {
>         cout << "int caught\n";
>     }
> }
>
>
> int main()
> {
>     try  {
>         throw 1;
>     }
>     catch( ... ) {
>         try {
>             unknown_exception_handler();
>         } catch( ... ) {
>             cout << "unknown exception\n";
>         }
>     }
> }
>
> and provide a way to configure unknown_exception_handler.
> Dave, do you have something different in mind?

Yes; check out
http://www.boost.org/libs/python/doc/v2/exception_translator.html

This allows multiple independently registered exception handlers.
Whether or not that's overkill for your purposes is another matter.

note however that the try { throw; } idiom breaks on many popular
compilers that are still in use, which is why my code doesn't use it.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com