nom::IResult::map_rem

nom.IResult.rs

// For debugging purposes:

impl<I, O, E=u32> IResult<I, O, E> {
    fn map_rem<R, F: FnOnce(I) -> R>(self, f: F) -> IResult<R, O, E> {
        use IResult::*;
        match s {
            Done(i, o) => Done(f(i), o),
            Error(e)   => Error(e),
            Incomplete(n) => Incomplete(n),
        }
    }
}

// The purpose of this is mainly to get away from b"..." while testing
// since the results are not human readable in a terminal...
fn utf8(s: &[u8]) -> &str {
    std::str::from_utf8(s).unwrap()
}
let d = Done(b"remaining", b"matched");
assert_eq!(d.map(utf8).map_rem(utf8), Done("remaining", "matched"));