# Function nom::multi::many_till

source · [−]

    pub fn many_till<I, O, P, E, F, G>(
        f: F,
        g: G
    ) -> impl FnMut(I) -> IResult<I, (Vec<O>, P), E> where
        I: Clone + InputLength,
        F: Parser<I, O, E>,
        G: Parser<I, P, E>,
        E: ParseError<I>,

Expand description

Applies the parser `f` until the parser `g` produces a result.

Returns a tuple of the results of `f` in a `Vec` and the result of `g`.

`f` keeps going so long as `g` produces `Err::Error`. To instead chain an error up, see `cut`.

    use nom::multi::many_till;
    use nom::bytes::complete::tag;

    fn parser(s: &str) -> IResult<&str, (Vec<&str>, &str)> {
      many_till(tag("abc"), tag("end"))(s)
    };

    assert_eq!(parser("abcabcend"), Ok(("", (vec!["abc", "abc"], "end"))));
    assert_eq!(parser("abc123end"), Err(Err::Error(Error::new("123end", ErrorKind::Tag))));
    assert_eq!(parser("123123end"), Err(Err::Error(Error::new("123123end", ErrorKind::Tag))));
    assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Tag))));
    assert_eq!(parser("abcendefg"), Ok(("efg", (vec!["abc"], "end"))));