extern type CPoint {
    x: i32,
    y: i32,
}

packed type Header {
    tag: u8,
    len: u16,
}

type Wrapper {
    value: const i32,
}

pub fn main(world: World) -> Void raises {
    let point: CPoint = CPoint { x: 1, y: 2 }
    let header: Header = Header { tag: 7_u8, len: 9_u16 }
    let wrapper: Wrapper = Wrapper { value: 11 }
    if point.x == 1 && header.len == 9_u16 && wrapper.value == 11 {
        check world.out.write("const layout ok\n")
    }
}