#[allow(dead_code)]
struct Thing {
    x: usize,
    y: &'static str,
    more: Vec<String>
}

macro_rules! th {
    ($x:expr, $y:expr) => (Thing{x: $x, y: $y, more: vec![]})
}

fn main() {
    let x = 2usize;
    let y = "bar";
    let _thing = th!(x, y);
}