Function uint64 

pub fn uint64(bits: &Bits) -> u64

Converts up to the first 64 bits of a bit string to a 64 bit unsigned integer.

Example

let bits = Bits::new([0x10, 0x32, 0x54, 0x76]);
let ulong = bits_as::uint64(&bits);

assert_eq!(ulong, 0x0000000076543210);

let bits = Bits::from([0x10, 0x32, 0x54, 0x76]);
let ulong = bits_as::uint64(&bits);

assert_eq!(ulong, 0x0000000076543210);