Function winnow::character::crlf

pub fn crlf<I, E: ParseError<I>>(
    input: I
) -> IResult<I, <I as Stream>::Slice, E>where
    I: StreamIsPartial + Stream + Compare<&'static str>,

Recognizes the string “\r\n”.

Complete version: Will return an error if there’s not enough input data.

Partial version: Will return Err(winnow::error::ErrMode::Incomplete(_)) if there’s not enough input data.

Example

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

assert_eq!(parser("\r\nc"), Ok(("c", "\r\n")));
assert_eq!(parser("ab\r\nc"), Err(ErrMode::Backtrack(Error::new("ab\r\nc", ErrorKind::Tag))));
assert_eq!(parser(""), Err(ErrMode::Backtrack(Error::new("", ErrorKind::Tag))));

assert_eq!(crlf::<_, Error<_>>(Partial::new("\r\nc")), Ok((Partial::new("c"), "\r\n")));
assert_eq!(crlf::<_, Error<_>>(Partial::new("ab\r\nc")), Err(ErrMode::Backtrack(Error::new(Partial::new("ab\r\nc"), ErrorKind::Tag))));
assert_eq!(crlf::<_, Error<_>>(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(2))));