ref: 14fd8b9e92ffe32275aba6f30dd8edf4531c6a19
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
	| `std.Some v:	std.put("val = {}\n", v)
	| `std.None:	std.die("Unreachable\n")
	;;
}