Macro bit_fiddler::max_bits

macro_rules! max_bits {
    ($bitmap: tt) => { ... };
    (type = $ty: ty) => { ... };
}

For getting total bit count by type or identifier.

Example

use bit_fiddler::max_bits;

assert_eq!(max_bits!(type = i32), 32);
assert_eq!(max_bits!((5 as u64)), 64);

let bitmap: u8 = 0;

assert_eq!(max_bits!(bitmap), 8);