Function bin_digit0

pub fn bin_digit0<T, E>(input: T) -> Result<(T, T), Err<E>>
where
    E: ParseError<T>,
    T: Input,
    <T as Input>::Item: AsChar,

Recognizes zero or more binary characters: 0-1

Complete version: Will return the whole input if no terminating token is found (a non binary digit character).

Example

fn parser(input: &str) -> IResult<&str, &str> {
    bin_digit0(input)
}

assert_eq!(parser("013a"), Ok(("3a", "01")));
assert_eq!(parser("a013"), Ok(("a013", "")));
assert_eq!(parser(""), Ok(("", "")));