Function nom::number::complete::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

complete version: returns an error if there is not enough input data

use nom::number::complete::be_u64;

let parser = |s| {
  be_u64(s)
};

assert_eq!(parser(b"\x00\x01\x02\x03\x04\x05\x06\x07abcefg"), Ok((&b"abcefg"[..], 0x0001020304050607)));
assert_eq!(parser(b"\x01"), Err(Err::Error((&[0x01][..], ErrorKind::Eof))));