ref: 6af02a3600c74a974bfdcec12ead515a611a0234 dir: /test/overlappingif.myr/
const main = { var v var x v = 0xff if v & 0xff00 != 0 x = 1 elif v & 0xfff0 != 0 x = 2 elif v & 0xffff != 0 x = 3 ;; -> x }