Function winnow::ascii::line_ending

pub fn line_ending<I, E: ParserError<I>>(
    input: &mut I,
) -> PResult<<I as Stream>::Slice, E>
where
    I: StreamIsPartial + Stream + Compare<&'static str>,

Recognizes an end of line (both "\n" and "\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<'s>(input: &mut &'s str) -> PResult<&'s str, InputError<&'s str>> {
    line_ending.parse_next(input)
}

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

assert_eq!(line_ending::<_, InputError<_>>.parse_peek(Partial::new("\r\nc")), Ok((Partial::new("c"), "\r\n")));
assert_eq!(line_ending::<_, InputError<_>>.parse_peek(Partial::new("ab\r\nc")), Err(ErrMode::Backtrack(InputError::new(Partial::new("ab\r\nc"), ErrorKind::Tag))));
assert_eq!(line_ending::<_, InputError<_>>.parse_peek(Partial::new("")), Err(ErrMode::Incomplete(Needed::new(1))));