Summary

Traits define behavior that can be implemented by many different types

You can put restrictions on type parameters by adding trait bounds

Trait bounds can be added for functions, impl blocks, and more

The Display trait is used by println!, format!, and related macros

A number of common traits can be derived, so you don’t have to write them by hand

Clone is a derivable trait that lets you make a copy

Copy is a derivable marker trait that tells the compilr, “It’s really cheap to clone"

Debug is a derivable trait that produces output useful for debugging your code

PartialEq and Eq control the == and != operators

PartialOrd and Ord control the four other comparison operators

In order to use a trait, the trait must be in scope

You can bring a trait into scope with use

You can place multiple bounds on a type parameter by using +

Traits can define associated types