It is currently unstable and incomplete, which means you can activate it by adding the macros #![feature(specialization)] and #![allow(incomplete_features)] at the beginning of the file. But you have no guarantee that it will work the same way on the next version of rust.
What you are looking for is called specialization.
It is currently unstable and incomplete, which means you can activate it by adding the macros
#![feature(specialization)]and#![allow(incomplete_features)]at the beginning of the file. But you have no guarantee that it will work the same way on the next version of rust.