foreach (@array) {
    do_something_with($item, state i++);
}
[download]

Doesn't look any cleaner than

my $i;
foreach (@array) {
    do_something_with($item, $i++);
}
[download]

(imo)

And since 'state' is something I rarely use (ok never) you can bet I'll be looking it up in the docs every time I see it to be sure of exactly what it's doing. It's sometimes annoying that there's no magic variable to get an index in a foreach, but I think you've sacrificed readability (and portability) for the sake of a single line of convenience?