ref: 705f2d8c1f2d2b9f68ea7ef30af3b43d69a64b6a dir: /test/genericmatch.myr/
use std type t(@a) = union `Foo @a `Bar ;; const main = { match `Foo 123 | `Foo a: std.exit(0xf) | `Bar: std.exit(0x0) ;; }