Trait wasmer_types::lib::std::ops::Shr 1.0.0[−][src]
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] });