//ww:run-exit 69
package main;
type box = struct { pc: size, matched: bool };
fn add(p: *[]box, v: size) void = {
	let b: box = box { pc = v, matched = true };
	append(*p, b);
};
export fn main() i32 = {
	let bs: []box = [];
	add(&bs, 7);
	if (len(bs) != 1) { return 1; };
	if (bs[0].pc != 7) { return 2; };
	if (!bs[0].matched) { return 3; };
	return 69;
};