Re: Use a shared_ptr as a 'backpointer'?

From: Bohdan (yg-boost-users_at_[hidden])
Date: 2002-10-04 10:57:17

"David Abrahams" <yg-boost-users_at_[hidden]> wrote in message
news:an83fa$l0u$1_at_main.gmane.org...
> <dick.bridges_at_[hidden]> wrote in message
> news:OF699D7956.EED22A4F-ON88256C43.00722AD0_at_tais.net...
> > I run into situations where it's useful for an object to have a
> > 'backpointer' to the object instance that created it (example below).  Is
> > there a pattern/idiom for doing this using shared_ptr?  Or maybe I need to
> > re-think the idea of the backpointer in the first place?
> >
>
>
> class Bar;
>
> class Foo
> {
>  public:
>     Foo(shared_ptr<Bar>);
>
>  private:
>     shared_ptr<Bar> p;
> };
>
> class Bar : boost::shared_count
> {
>     void doit()
>     {
>          new Foo(boost::shared_from_this(this));     // <<< new Foo(this)
> obviously won't work.
>     }
> };

But shared_count is in detail nemespace. Is it correct ?

regards,
bohdan