# Trait tracing_core::stdlib::ops::Shr

1.0.0 · source · ```
pub trait Shr<Rhs = Self> {
type Output;
// Required method
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));
```

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] });
```