subclass to base class but not subclass pointer to base class pointer?

[John Colvin]

On Saturday, 20 April 2013 at 21:36:37 UTC, John Colvin wrote:
> On Saturday, 20 April 2013 at 17:42:02 UTC, Namespace wrote:
>> And no, the equivalent version would use 'A' as return type of 
>> 'get', not 'A*'.
>
> Sorry, no.
>
> //C++
> A* get(unsigned int id);
>
> //D
> A get(unsigned int id);
>
> Those are the equivalent declarations. A reference is, for 
> these intents and purposes, a pointer and D classes are 
> reference types. In D, "get" returns a reference to an object, 
> i.e. a pointer to an object.
>
> C++ does not have polymorphic pointers to pointers to class 
> objects, for good reason (see my original reply). AFAIK the 
> same reasons apply to D, hence D has no polymorphic pointers to 
> references to class objects.

woops, that should be uint in the D declaration not unsinged int.