Re: [Boost-users] Unable to catch exception using boost::asio

Subject: Re: [Boost-users] Unable to catch exception using boost::asio
From: Alex Black (alex_at_[hidden])
Date: 2009-07-15 13:27:38

Thanks for the tip. 

However, my destructors are empty in this case. 

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] 
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of 
> Emil Dotchevski
> Sent: Wednesday, July 15, 2009 1:21 PM
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] Unable to catch exception using boost::asio
> 
> On Wed, Jul 15, 2009 at 10:10 AM, Alex Black 
> <alex_at_[hidden]> wrote:
> > You mentioned never throwing exceptions in destructors - 
> sounds like 
> > good advice, thx. Two points though:
> > 1. If an exception is thrown in a destructor can it not be 
> caught with 
> > a try catch( ... )?
> 
> If a destructor calls functions that may throw, it should use
> catch(...) and not let exceptions propagate out of the 
> destructor itself. However, when writing or sending data, the 
> user may want to know that the operation has completed 
> successfully. Typically, you'd provide a separate flush 
> function for that use case, which you'd then call in the 
> destructor, as in:
> 
> foo_sender::~foo_sender()
> {
>   try
>   {
>     flush();
>   }
>   catch(...)
>   {
>   }
> }
> 
> Emil Dotchevski
> Reverge Studios, Inc.
> http://www.revergestudios.com/reblog/index.php?n=ReCode
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