Function nom::number::streaming::be_u64

pub fn be_u64<'a, E: ParseError<&'a [u8]>>(
    i: &'a [u8]
) -> IResult<&'a [u8], u64, E>

Recognizes a big endian unsigned 8 bytes integer

streaming version: will return Err(nom::Err::Incomplete(_)) if there is not enough data

use nom::number::streaming::be_u64;

let parser = |s| {
  be_u64::<(_, ErrorKind)>(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::Size(8))));