Re: [Boost-users] enable_shared_from_this & inheritance

From: Russell Hind (rh_gmane_at_[hidden])
Date: 2006-10-18 04:16:57

I thought each time you inherit from enable_shared_from_this<T> you get 
a new reference count, so with the code below, won't you end up with 2 
separate reference counts to the same instance?  I thought this was a 
limitation of shared_from_this.

Russell

Johan Nilsson wrote:
> 
> Do you mean something like this?
> 
> ---------
> 
> #include <boost/enable_shared_from_this.hpp>
> 
> struct A
>     : boost::enable_shared_from_this<A>
> {};
> 
> struct B
>     : A
>     , boost::enable_shared_from_this<B>
> {
>     boost::shared_ptr<B> FooB()
>     {
>         return boost::enable_shared_from_this<B>::shared_from_this();
>     }
> 
>     boost::shared_ptr<A> FooA()
>     {
>         return boost::enable_shared_from_this<A>::shared_from_this();
>     }
> };
> 
> ------------
> 
> HTH // Johan