Function winnow::character::complete::digit1

pub fn digit1<T, E: ParseError<T>>(
    input: T
) -> IResult<T, <T as Stream>::Slice, E>where
    T: Stream,
    <T as Stream>::Token: AsChar,

👎Deprecated since 0.1.0: Replaced with <code>winnow::character::digit1</code>

Recognizes one 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).

Example

fn parser(input: &str) -> IResult<&str, &str> {
    digit1(input)
}

assert_eq!(parser("21c"), Ok(("c", "21")));
assert_eq!(parser("c1"), Err(ErrMode::Backtrack(Error::new("c1", ErrorKind::Digit))));
assert_eq!(parser(""), Err(ErrMode::Backtrack(Error::new("", ErrorKind::Digit))));

Parsing an integer

You can use digit1 in combination with map_res to parse an integer:

fn parser(input: &str) -> IResult<&str, u32> {
  map_res(digit1, str::parse)(input)
}

assert_eq!(parser("416"), Ok(("", 416)));
assert_eq!(parser("12b"), Ok(("b", 12)));
assert!(parser("b").is_err());

WARNING: Deprecated, replaced with winnow::character::digit1