ref: fd1b8b6f31b7a8c2705c3ac01e46fd707c0d3c9e 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) ;; }