Re: [Boost-users] Throwing an exception in a packaged_task: is there a clear example?

Subject: Re: [Boost-users] Throwing an exception in a packaged_task: is there a clear example?
From: Mark Wilson (mwil_at_[hidden])
Date: 2010-08-19 15:25:27

Thank you, Emil.   That works.

On Thu, Aug 19, 2010 at 2:25 PM, Emil Dotchevski <emil_at_[hidden]>wrote:

> On Thu, Aug 19, 2010 at 8:54 AM, Mark Wilson <mwil_at_[hidden]>
> wrote:
> > Hello,
> >
> > I am throwing an exception from a packaged_task, and then trying to catch
> it
> > with f.get() (where f is a unique_future); it doesn't work, the program
> just
> > terminates with:
> >
> > terminate called after throwing an instance of
> > 'boost::exception_detail::clone_impl<boost::unknown_exception>'
> >   what():  std::exception
> >
> >
> > Is there a simple example somewhere, or could someone provide one, that
> > makes clear how this mechanism is supposed to work?  The Threads
> > documentation does not show how to do this...
>
> Try replacing throw MyException with
> BOOST_THROW_EXCEPTION(MyException()). You'll need to #include
> <boost/throw_exception.hpp>.
>
> The page at
> http://beta.boost.org/doc/libs/release/libs/exception/doc/current_exception.html
> explains why you get a boost::unknown_exception.
>
> HTH,
> Emil Dotchevski
> Reverge Studios, Inc.
> http://www.revergestudios.com/reblog/index.php?n=ReCode
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