Virtual Classes?

[Basile B. via Digitalmars-d-learn]

On Thursday, 18 August 2016 at 02:51:48 UTC, Meta wrote:
> On Thursday, 18 August 2016 at 00:49:49 UTC, Engine Machine 
> wrote:
>> https://en.wikipedia.org/wiki/Virtual_class
>>
>> Can D do stuff like this naturally?
>
> Yes, D's `alias this` feature supports this.
>
> https://dlang.org/spec/class.html#alias-this

No read carefully, alias this does not the same thing, 
particularly when the time comes to override the inner type.