#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ops::ShrAssign;
#[derive(Debug, PartialEq)]
struct Scalar(usize);
impl ShrAssign<usize> for Scalar {
    fn shr_assign(&mut self, rhs: usize) {
        self.0 >>= rhs;
    }
}
fn main() {
    let mut scalar = Scalar(16);
    scalar >>= 2;
    assert_eq!(scalar, Scalar(4));
}