ref: 10aacae6e0d47aa51731453998dbfcec1bbb6641 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;; ;; }