//ww:run-exit 68
package main;
type box = struct { pc: size, matched: bool };
fn add(p: *[]box, v: size) void = {
	append(*p, box { pc = v, matched = false });
};
export fn main() i32 = {
	let bs: []box = [];
	add(&bs, 5);
	add(&bs, 9);
	if (len(bs) != 2) { return 1; };
	if (bs[0].pc != 5) { return 2; };
	if (bs[1].pc != 9) { return 3; };
	return 68;
};