foreach and retro

[bearophile]

Joseph Rushton Wakeling:

>       double[] a = [ 0, 1, 2, 3, 4, 5 ];
>
>       foreach(i, x; retro(a))
>             writeln(i, "\t", x);

It's not a bug, it's caused by how ranges like retro work. retro 
yields a single item. In D you can't overload on return values, 
so foreach can't try to call a second retro.front overload that 
yields an (index,item) tuple (that later foreach is able to 
unpack on the fly) instead of the retro.front that just yields 
the item.

To solve that problem this is what I have suggested to add to 
Phobos:
http://d.puremagic.com/issues/show_bug.cgi?id=5550

Bye,
bearophile