Rust switches to external iteration

[bearophile]

w0rp:

> It would be nice to beat them to the punch on this. Yield is a 
> great tool. You can implement not so bad yield-like behaviour 
> yourself in D, though. I have an old example that I baked up a 
> while ago.
>
> http://pastebin.com/EGqLHk0U
>
> I'd prioritise important matters like improving the garbage 
> collector and other non-language changing, but definitely 
> beneficial improvements, over a big language addition like 
> yield, though.

+1

Bye,
bearophile