//ww:run-exit 5
package main;
type box = struct { t: (str | int), n: int };
fn main() i32 = {
	let b: box = box { t = 0, n = 5 }; b.t = "hello";
	match (b.t) { case let s: str => return len(s): i32; case int => return 99; };
};