Function be_u8

pub fn be_u8<I, E: ParseError<I>>() -> impl Parser<I, Output = u8, Error = E>
where
    I: Input<Item = u8>,

Recognizes an unsigned 1 byte integer.

use nom::number::be_u8;

let parser = |s| {
  be_u8::<_, (_, ErrorKind)>().parse(s)
};

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