Re: Use a shared_ptr as a 'backpointer'?

4 Oct 2002


      "David Abrahams"  wrote in message
news:an83fa$l0u$1@main.gmane.org...
...
 wrote in message
news:OF699D7956.EED22A4F-ON88256C43.00722AD0@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

Re: Use a shared_ptr as a 'backpointer'?

Bohdan