ref: db794e2073cc57f0a6f7606c0086b73fe9f02fda
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)
| _: std.die("Impossible failed match\n")
;;
}