pub fn digit1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> where
T: InputTakeAtPosition,
<T as InputTakeAtPosition>::Item: AsChar, Expand description
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(Err::Error(Error::new("c1", ErrorKind::Digit))));
assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Digit))));