Function bitwise::word::ceil_pow2

pub fn ceil_pow2<T: Word>(x: T) -> T

Round x to the next power of 2.

Panics

If the next power of 2 cannot be represented by T.

Examples

use bitwise::word::*;

assert_eq!(2.ceil_pow2(), 2);
assert_eq!(ceil_pow2(3), 4);
assert_eq!(4.ceil_pow2(), 4);
assert_eq!(5.ceil_pow2(), 8);
assert_eq!(6.ceil_pow2(), 8);
assert_eq!(7.ceil_pow2(), 8);
assert_eq!(8.ceil_pow2(), 8);
assert_eq!(2u32.pow(30).ceil_pow2(), 2u32.pow(30));
assert_eq!((2u32.pow(30) + 1).ceil_pow2(), 2u32.pow(31));
assert_eq!(2u32.pow(31).ceil_pow2(), 2u32.pow(31));
// panics:
// assert_eq!((2u32.pow(31) + 1).ceil_pow2(), 2u32.pow(32));