Function winnow::number::le_u8

source ·
pub fn le_u8<I, E: ParseError<I>>(input: I) -> IResult<I, u8, E>where
    I: StreamIsPartial + Stream<Token = u8>,
Expand description

Recognizes an unsigned 1 byte integer.

Complete version: Returns an error if there is not enough input data.

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

Example

use winnow::number::le_u8;

let parser = |s| {
  le_u8(s)
};

assert_eq!(parser(&b"\x00\x03abcefg"[..]), Ok((&b"\x03abcefg"[..], 0x00)));
assert_eq!(parser(&b""[..]), Err(ErrMode::Backtrack(Error::new(&[][..], ErrorKind::Eof))));
use winnow::number::le_u8;

let parser = le_u8::<_, Error<_>>;

assert_eq!(parser(Partial::new(&b"\x00\x01abcd"[..])), Ok((Partial::new(&b"\x01abcd"[..]), 0x00)));
assert_eq!(parser(Partial::new(&b""[..])), Err(ErrMode::Incomplete(Needed::new(1))));