#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(uint_bit_width)]
fn main() {
    assert_eq!(0_u8.bit_width(), 0);
    assert_eq!(0b111_u8.bit_width(), 3);
    assert_eq!(0b1110_u8.bit_width(), 4);
    assert_eq!(u8::MAX.bit_width(), 8);
}