Re: [boost] [smart_ptr] shared_from_this

From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2008-03-26 09:26:37

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On Wednesday 26 March 2008 08:00 am, Daniel Frey wrote:
> On Wed, 2008-03-26 at 07:38 -0400, Frank Mori Hess wrote:
> > On Wednesday 26 March 2008 02:55, Daniel Frey wrote:
> > > Hello again,
> > >
> > > does shared_from_this() also guarantee that it never throws?
> >
> > No, it can throw bad_weak_ptr.
>
> <http://boost.org/libs/smart_ptr/smart_ptr.htm> states that only
> std::bad_alloc is thrown - if anything is thrown at all. Am I misreading
> that?

That's talking about the smart pointer classes.  shared_from_this is a method 
of enable_shared_from_this, which isn't a smart pointer.

> And reading the documentation for weak_ptr, it's not clear to me when a
> bad_weak_ptr exception is thrown at all. All weak_ptr functions are
> documented to never throw.

It's thrown by the shared_ptr constructor that takes a weak_ptr argument.

- -- 
Frank
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