ref: de1eabd91024f360845dfe7382581e0acbc368e1
dir: /lib/iter/test/reverse.myr/
use std
use iter
const main = {
var n
n = 0
for x : iter.byreverse([3, 2, 1, 0][:])
std.assert(x == n, "invalid reversed value {}, expected {}", x, n)
n++
;;
}