Implementing interfaces using alias this

[ketmar via Digitalmars-d-learn]

Mike B Johnson wrote:

> I don't think it has to do with pasting code.
>
> d.Quack() is well defined through the alias. Inheritance requires that a 
> Quack() exists, and it does, through the alias.
>
> The compiler could easily create an implementation wrapper that uses the 
> alias this.

this is called "code pasting".