Macro bit

macro_rules! bit {
    ($index:expr) => { ... };
    ($($index:expr), +) => { ... };
}

Generate a mask from one or more bit indices.

use macro_bits::bit;

const SINGLE_BIT: u8 = bit!(0);
const MULTIPLE_BITS: u8 = bit!(1,2);

assert_eq!(SINGLE_BIT, 1);
assert_eq!(MULTIPLE_BITS, 6);