ref: db34187dc25f6b3f1a85b85c4dcf9a69b1cb4d54
dir: /test/genericmake.myr/
use std
type t(@ty) = union
	`Some @ty
	`None
;;
const make = {v
	-> `Some v
}
const main = {
	var x
	x = make(123)
	match x
	| `Some v:	std.put("val = {}\n", v)
	| `None:	std.die("Unreachable\n")
	;;
}