[boost] Re: [pointer container] copyability

From: Bob Bell (belvis_at_[hidden])
Date: 2005-04-27 11:29:02

Thorsten Ottosen <nesotto <at> cs.auc.dk> writes:
> "David Abrahams" <dave <at> boost-consulting.com> wrote in message 
> news:uk6mo2ylf.fsf <at> boost-consulting.com...
> | "Thorsten Ottosen" <nesotto <at> cs.auc.dk> writes:
> |
> | > A "value object" implies something that behaves as an int; a
> | > "polymophic object" implies something that needs to allocated
> | > dynamically and which has virtual functions.
> |
> | A polymorphic object doesn't need to be allocated dynamically.
> 
> if you want it to act polymophic you have to.

Nonsense:

class B { /* abstract base class */ };
class D : public B { /* implementation */ };

void F(B& obj)
{
   // call B virtual functions
}

void G()
{
   D   d;

   F(d);
}

How is D not being used polymorphically inside F()?

Bob