ref: d3ed26c37dedef85e3b193724facde2ee24acb64
dir: /test/matchargunion.myr/
use std
/* checks pattern matching on unions with arguments.
exits with 42. */
type u = union
`Int int
`Chr char
`Nil
;;
const main = {
var v
v = `Int 123
match v
| `Int 127: std.exit(42)
| `Int 123: std.exit(69)
| `Chr 'a': std.exit(4)
| `Nil: std.exit(6)
;;
}