nom::separated_pair!

macro_rules! separated_pair {
    ($i:expr, $submac:ident!( $($args:tt)* ), $($rest:tt)+) => { ... };
    ($i:expr, $f:expr, $($rest:tt)+) => { ... };
}

separated_pair!(I -> IResult<I,O>, I -> IResult<I, T>, I -> IResult<I,P>) => I -> IResult<I, (O,P)> separated_pair(X,sep,Y) returns (x,y)