Rust

8.2    Traits

In this section, we’ll explore the concept of traits in Rust and how they enable polymorphism. We’ll start by explaining why and how to use traits. Then, we’ll dive into the details, covering topics like default implementations, trait bounds, supertraits, trait objects, derived traits, marker traits, and associated types.

8.2.1    Motivating Example for Traits

Let’s consider two structures, Square and Rectangle, as shown in Listing 8.14.

struct Square {    side: f32,    line_width: u8,    color: String,}struct Rectangle {    length: f32,    width: f32,    line_width: u8,    color: String,}  

Listing 8.14     Defining the Struct Square and Rectangle

The Square struct has a field called side, which defines the square’s dimensions. Additionally, this struct ...