_indexed_ iteration using opApply or range -- PS

[spir]

On Sun, 12 Dec 2010 20:47:04 +0100
spir <denis.spir at gmail.com> wrote:

> Hello,
> 
> Had a nice time figuring out how to let opApply allow index iteration like:
>     foreach (i, x ; collection) {}
> Finally managed to do it adding 'i' everywhere:
> 
> struct S1 {
>     private int[] elements = [];
>     int opApply (int delegate (ref uint, ref int) block) {
>         foreach (uint i, int n ; this.elements)
>             block(i, n);
>         return 0;
>     }
> }
> 
> Is this the intended idiom?
> Now, I'm trying to make this work with ranges instead (input range only as of now). Seems i'm not smart enough to guess it alone...
> 
> Thank you,
> Denis

PS: Also tried to make iteration work by defining slice "with no argument" (coll[]) only, like indicated in TDPL p.381. But could not manage to do it.

Thank you again,
Denis
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