Rust

8.3    Choosing between Associated Types and Generic Types

Both generic types and associated types allow the implementer to decide which concrete types should be used in a trait’s functions and methods. In this section, we explore the circumstances under which each should be used, aiming to clarify when generics are more suitable and when associated types offer a better solution.

Consider an Addition trait with a single add method, as shown in Listing 8.47.

trait Addition {    type Rhs;    type Output;    fn add(self, rhs: Self::Rhs) -> Self::Output;}  

Listing 8.47     Defining the Addition Trait with Associated Types of Rhs and Output

This trait will let’s add instances of types self and Rhs using the add method.

Next, define a simple Point struct representing ...