ref: 795ee8f8c9ef7eae69fdd2d00bfc4b7753e31dbb 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) ;; }