Re: [boost] [shared_ptr] enable_shared_from_any ?

Subject: Re: [boost] [shared_ptr] enable_shared_from_any ?
From: Philip Warner (pjw_at_[hidden])
Date: 2010-05-17 19:15:15

On 17/05/2010 11:20 PM, Frank Mori Hess wrote:
> Are you saying you want to have a covariant return types with
> shared_ptr? 

Among other things, yes. But the bulk of my message was effectively
suggesting replacing enable_shared_from_this{2} with
enable_shared_from_any to allow safe creation of shared_ptrs from any
pointer to an object that inherits from enable_shared_from_any.

I have not tested your specific example, but it looks a lot like one of
the many attempts we have made in the past to return covariant pointers.
AFAICT, for good reasons, it is just not possible.