ref: 81bbd4c2bf2f3b7ccf53d2f46aef65f56e0ae7e5 dir: /test/genericret.myr/
use std type t(@a) = union `Val @a `None ;; const f = {-> t(int) -> `None } const main = { match f() | `None: std.exit(42) ;; std.exit(0) }