Function alpha1

pub fn alpha1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E>
where
    T: InputTakeAtPosition,
    <T as InputTakeAtPosition>::Item: AsChar,

Recognizes one or more lowercase and uppercase ASCII alphabetic characters: a-z, A-Z

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 alphabetic character).

Example

fn parser(input: &str) -> IResult<&str, &str> {
    alpha1(input)
}

assert_eq!(parser("aB1c"), Ok(("1c", "aB")));
assert_eq!(parser("1c"), Err(Err::Error(Error::new("1c", ErrorKind::Alpha))));
assert_eq!(parser(""), Err(Err::Error(Error::new("", ErrorKind::Alpha))));