Function be_u64

pub fn be_u64<I, E: ParseError<I>>() -> impl Parser<I, Output = u64, Error = E>
where
    I: Input<Item = u8>,

Recognizes a big endian unsigned 8 bytes integer.

use nom::number::be_u64;

let parser = |s| {
  be_u64::<_, (_, ErrorKind)>().parse(s)
};

assert_eq!(parser(&b"\x00\x01\x02\x03\x04\x05\x06\x07abcd"[..]), Ok((&b"abcd"[..], 0x0001020304050607)));
assert_eq!(parser(&b"\x01"[..]), Err(Err::Incomplete(Needed::new(7))));