#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ops::Shl;
#[derive(PartialEq, Debug)]
struct SpinVector<T: Clone> {
    vec: Vec<T>,
}
impl<T: Clone> Shl<usize> for SpinVector<T> {
    type Output = Self;
    fn shl(self, rhs: usize) -> Self::Output {
        let (a, b) = self.vec.split_at(rhs);
        let mut spun_vector = vec![];
        spun_vector.extend_from_slice(b);
        spun_vector.extend_from_slice(a);
        Self { vec: spun_vector }
    }
}
fn main() {
    assert_eq!(
        SpinVector { vec : vec![0, 1, 2, 3, 4] } << 2, SpinVector { vec : vec![2, 3, 4,
        0, 1] }
    );
}