pub fn digit0<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> where
T: InputTakeAtPosition,
<T as InputTakeAtPosition>::Item: AsChar, Expand description
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).
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(("", "")));