//ww:run-exit 3
package main;
type pair = struct { x: i64, y: i64, z: i64 };
type tag = ([]u8 | pair);
type holder = struct { e: tag, mark: i32 };
fn main() i32 = {
	let raw: [8]u8;
	raw[0] = 1u8; raw[1] = 2u8; raw[2] = 3u8;
	let h: holder;
	h.mark = 99;
	h.e = (raw[0:3]: tag);
	match (h.e) {
	case let v: []u8 => {
		if (v.cap != 8) { return 20; };
		return v.len: i32;
	};
	case let p: pair => return -1;
	};
};