ref: f4a939a2cfdc00643b02c404b0acbed382964dd0
dir: /lib/iter/test/reverse.myr/
use std
use iter
const main = {
var n, l : int[:]
n = 0
l = [3, 2, 1, 0][:]
for x : iter.byreverse(l)
std.assert(x == n, "invalid reversed value {}, expected {}", x, n)
n++
;;
}