# Trait core::ops::Shr1.0.0[−][src]

``````pub trait Shr<Rhs = Self> {
type Output;
fn shr(self, rhs: Rhs) -> Self::Output;
}``````
Expand description

The right shift operator `>>`. Note that because this trait is implemented for all integer types with multiple right-hand-side types, Rust’s type checker has special handling for `_ >> _`, setting the result type for integer operations to the type of the left-hand-side operand. This means that though `a >> b` and `a.shr(b)` are one and the same from an evaluation standpoint, they are different when it comes to type inference.

## Examples

An implementation of `Shr` that lifts the `>>` operation on integers to a wrapper around `usize`.

``````use std::ops::Shr;

#[derive(PartialEq, Debug)]
struct Scalar(usize);

impl Shr<Scalar> for Scalar {
type Output = Self;

fn shr(self, Self(rhs): Self) -> Self::Output {
let Self(lhs) = self;
Self(lhs >> rhs)
}
}

assert_eq!(Scalar(16) >> Scalar(2), Scalar(4));``````
Run

An implementation of `Shr` that spins a vector rightward by a given amount.

``````use std::ops::Shr;

#[derive(PartialEq, Debug)]
struct SpinVector<T: Clone> {
vec: Vec<T>,
}

impl<T: Clone> Shr<usize> for SpinVector<T> {
type Output = Self;

fn shr(self, rhs: usize) -> Self::Output {
// Rotate the vector by `rhs` places.
let (a, b) = self.vec.split_at(self.vec.len() - rhs);
let mut spun_vector = vec![];
spun_vector.extend_from_slice(b);
spun_vector.extend_from_slice(a);
Self { vec: spun_vector }
}
}

assert_eq!(SpinVector { vec: vec![0, 1, 2, 3, 4] } >> 2,
SpinVector { vec: vec![3, 4, 0, 1, 2] });``````
Run

## Associated Types

The resulting type after applying the `>>` operator.

## Required methods

Performs the `>>` operation.

##### Examples
``````assert_eq!(5u8 >> 1, 2);
assert_eq!(2u8 >> 1, 1);``````
Run