ref: de24f6900f69432010ba93df62652d687af90155
dir: /lib/std/test/iterutil.myr/
use std const main = { var n n = 0 for (x, i) in std.byenum([0,2,4,6,8][:]) std.assert(x == n, "invalid enum idx") std.assert(i == n*2, "invalid enum val") n++ ;; n = 0 for (a, b) in std.byzip([0,2,4,6,8][:], [2,4][:]) std.assert(a == n*2, "invalid val from a") std.assert(b == n*2 + 2, "invalid val from b") n++ ;; }