Re: Ranges, constantly frustrating

[bearophile]

Marc Schütz:

As far as I understand it, it's about adding an index to 
_foreach_, as is already supported for arrays:

foreach(v; [1,2,3,4])
    writeln(v);
foreach(i, v; [1,2,3,4])
    writeln(i, " => ", v);

But for ranges, the second form is not possible:

foreach(v; iota(4))           // ok
    writeln(v);
foreach(i, v; iota(4))        // Error: cannot infer argument 
types
    writeln(i, " => ", v);

I see. In my post I have explained why this is a bad idea (it's 
not explicit so it gives confusion, and it complicates the 
language/compiler).

A better design is to remove the auto-indexing feature for arrays 
too, and use .enumerate in all cases, as in Python.

Bye,
bearophile