gistfile1.txt

$ cat src/main.rs
#![feature(macro_rules)]
 
macro_rules! doe(
    ($h:expr) => ($h);
    ($h:expr; $($t:expr);+) => (bind($h, |_| { doe!($($t);*) }));
    ($v:ident <- $h:expr; $($t:expr);+) => (bind($h, |$v| { doe!($($t);+) }));
)
 
fn main() {
    doe!(
        x <- foo;
        return(x + 2)
    );
}
$ rustc --pretty=expanded src/main.rs
#![feature(macro_rules)]
#![feature(phase)]
#![no_std]
#![feature(globs)]
#[phase(plugin, link)]
extern crate "std" as std;
extern crate "native" as rt;
#[prelude_import]
use std::prelude::*;
 
 
fn main() { bind(foo, |x| { return (x + 2) }); }
$