Function winnow::character::digit0

pub fn digit0<I, E: ParseError<I>>(
    input: I
) -> IResult<I, <I as Stream>::Slice, E>where
    I: StreamIsPartial + Stream,
    <I as Stream>::Token: AsChar,

Recognizes zero or more ASCII numerical characters: 0-9

Complete version: Will return an error if there’s not enough input data, or the whole input if no terminating token is found (a non digit character).

Partial version: Will return Err(winnow::error::ErrMode::Incomplete(_)) if there’s not enough input data, or if no terminating token is found (a non digit character).

Example

fn parser(input: &str) -> IResult<&str, &str> {
    digit0(input)
}

assert_eq!(parser("21c"), Ok(("c", "21")));
assert_eq!(parser("21"), Ok(("", "21")));
assert_eq!(parser("a21c"), Ok(("a21c", "")));
assert_eq!(parser(""), Ok(("", "")));

assert_eq!(digit0::<_, Error<_>>(Partial::new("21c")), Ok((Partial::new("c"), "21")));
assert_eq!(digit0::<_, Error<_>>(Partial::new("a21c")), Ok((Partial::new("a21c"), "")));
assert_eq!(digit0::<_, Error<_>>(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(1))));