RFC on range design for D2

[Alix Pexton]

Andrei Alexandrescu wrote:
>(why the heck don't they call it structural typing...) 
> 
> Andrei

If it were the norm to call it "structural typing" and someone asked why it was called
so, the one being asked would likely have to resort to diagrams and gesticulation in
order to adequately convey the reasoning.

With "duck typing" a simple and widespread saying* is all that is required.

A...

* "If it walks like a duck and it quacks like a duck, then it's a duck!"