getNext

[Tomek Sowiński]

Dnia 13-07-2010 o 06:38:55 Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org> napisał(a):

> I've just had an idea that is so dark and devious, I was almost afraid  
> to try it. But it works like a charm. Consider:
>  T * getNext(R, E)(ref R range,
>                   ref E store = *(cast(E*) alloca(E.sizeof))
> {
>     ...
> }
>  With this, allocating a dummy buffer on caller's stack is automated, so  
> client code can just write:
>  for (T * p; (p = getNext(r)); )  {
>    ... process *p ...
> }
>  I feel dirty.

What's wrong with foreach(e; r) that you want to play dirty? The compiler  
is here to help.

Tomek