topdown-rs 0.0.1

A top-down parsing library
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#![macro_escape]
#[macro_export]
macro_rules! run_parser (
    () =>({});
    ($a:ident >> $x:expr) => ($a.accept($x));
    ($a:ident >> $x:expr -> |$i:ident| $b:expr) => ($a.accept($x).map(|$i| $b));
    ($a:ident >> $x:expr -> |$i:ident| $b:expr -> $(|$j:ident|$c:expr)->*) => ($a.accept($x).and_then(|$i| {run_parser!($a >> $b -> $(|$j| $c)->*)}));
);