Re: [boost] non-intrusive weak_ptr example?

From: David Abrahams (dave_at_[hidden])
Date: 2002-09-21 19:06:12

From: "Peter Dimov" <pdimov_at_[hidden]>

> > Is there an example which maps naturally onto non-intrusive use of
> > weak_ptr?
> 
> std::vector< shared_ptr<GameObject> > objects;
> 
> class Tank: public GameObject
> {
>     weak_ptr<GameObject> target_;
> 
> public:
> 
>     virtual void update()
>     {
>         if(shared_ptr<GameObject> p = make_shared(target_))
>         {
>             this->fireAt(p);
>         }
>         else
>         {
>             target_ = this->acquireNewTarget(objects);
>         }
>     }
> };
> 
> The basic paradigm would be siblings that refer to each other.

Cool; mind if I use this example almost verbatim?

-----------------------------------------------------------
           David Abrahams * Boost Consulting
dave_at_[hidden] * http://www.boost-consulting.com