Function winnow::character::hex_digit1

pub fn hex_digit1<I, E: ParseError<I>>(
    input: I
) -> IResult<I, <I as Stream>::Slice, E>where
    I: StreamIsPartial + Stream,
    <I as Stream>::Token: AsChar,

Recognizes one or more ASCII hexadecimal numerical characters: 0-9, A-F, a-f

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 hexadecimal digit character).

Partial version: Will return Err(winnow::error::ErrMode::Incomplete(_)) if there’s not enough input data, or if no terminating token is found (a non hexadecimal digit character).

Example

fn parser(input: &str) -> IResult<&str, &str> {
    hex_digit1(input)
}

assert_eq!(parser("21cZ"), Ok(("Z", "21c")));
assert_eq!(parser("H2"), Err(ErrMode::Backtrack(Error::new("H2", ErrorKind::HexDigit))));
assert_eq!(parser(""), Err(ErrMode::Backtrack(Error::new("", ErrorKind::HexDigit))));

assert_eq!(hex_digit1::<_, Error<_>>(Partial::new("21cZ")), Ok((Partial::new("Z"), "21c")));
assert_eq!(hex_digit1::<_, Error<_>>(Partial::new("H2")), Err(ErrMode::Backtrack(Error::new(Partial::new("H2"), ErrorKind::HexDigit))));
assert_eq!(hex_digit1::<_, Error<_>>(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(1))));