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use std
/* checks pattern matching on unions with arguments.
exits with 42. */
type u = union
	`Int int
	`Str byte[:]
	`Nil
;;

const main = {
	var v

	v = `Str "foo"
	match v
	| `Int 127: std.exit(42)
	| `Str s: std.put("{}\n", s)
	| `Nil:
	| _:	std.die("Impossible match failure\n")
	;;
}