Re: Passing shared_ptr to function that creates obj that shared_ptr points to

From: Russell Hind (yg-boost-users_at_[hidden])
Date: 2003-06-20 02:21:11

Drew wrote:
> void Fn(ParentPtr& pObj)
> {
>   pObj = ParentPtr(new Parent());
>   pObj->m_value = 10;
> }
> 
> If I pass the parent pointer, it compiles and works fine. If I pass 
> the derived pointer I get:
>  > error C2664: 'Fn' : cannot convert parameter 1 from 'DerivedPtr'
> to 'ParentPtr &'
> 

You can't assign to a shared_ptr (assuming ParentPtr is a shared_ptr as 
the moderator has suggested).  You have to call reset on it
e.g.

pObj.reset(new Parent());

HTH

Russell