Re: weak pointers, cbdata, refcounting

On Mon, 2005-08-22 at 16:38 -0600, Alex Rousskov wrote:
> Hi there,
>
> I need to implement what some call a "weak pointer". A weak pointer
> becomes null or otherwise invalid when the corresponding object goes
> away or is invalidated. For an example, please see
>
> http://www.boost.org/libs/smart_ptr/smart_ptr.htm
>
> I cannot use existing RefCount.h for weak pointing because the interface
> does not support "invalidation" of a pointer -- the RefCount pointer
> stays valid until nobody uses it.

CBData works fine with standard classes. I'm curious though why you need
a weak ref? Most weak ref uses I've seen are roughly a failure to use
observers.

Rob

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