The Shr trait is used to specify the functionality of >>.

Example

A trivial implementation of Shr. When Foo >> Foo happens, it ends up calling shr, and therefore, main prints Shifting right!.

struct Foo;

impl Shr<Foo, Foo> for Foo {
    fn shr(&self, _rhs: &Foo) -> Foo {
        println!("Shifting right!");
        *self
    }
}

fn main() {
    Foo >> Foo;
}