ref: 24e5832913b266731b7b0cbe430587ee6e76f683 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;; ;; }