//ww:run-exit 67
package main;
type capture = struct { content: str, start: size, end: size };
type result = []capture;
fn mk() result = {
	let caps: []capture = [];
	append(caps, capture { content = "xy", start = 1, end = 3 });
	append(caps, capture { content = "z", start = 4, end = 5 });
	return caps;
};
export fn main() i32 = {
	let m: result = mk();
	if (len(m) != 2) { return 1; };
	if (m[0].start != 1) { return 2; };
	if (m[0].content.len != 2) { return 3; };
	if (m[1].end != 5) { return 4; };
	return 67;
};