ref: 3a3ccd605eab52fec23689955b8f61398d739ad2 dir: /test/stdopt-mk.myr/
use std const f = {x if x == 123 -> `std.Some 42 else -> `std.None ;; } const main = { var v v = f(123) match v `std.Some x: -> x;; `std.None: -> 123;; ;; }