iota.rs

#![feature(macro_rules)]

macro_rules! foo {
    ($id:expr, $head:expr, $($tail:expr),+) => ({
        foo!($id, $head);
        foo!($id+1, $($tail),+);
    });
    ($id:expr, $var:expr) => ({
        println!("    {} = {},", $var, $id);
    });
}

macro_rules! bar {
    ($name:expr, $start:expr, ($($args:expr),+)) => ({
        println!("enum {} \\{", $name);
        foo!($start, $($args),*);
        println!("\\}");
    });
}

fn main() {
    bar!("Qux", 8, ("Q1", "Q2", "Q3"));
}