Traits - Rust Programming

A trait defines methods a type can implement. Implementing the trait gives the type that behavior.

Program

Play the program to implement a Greet trait for a struct.

traits.rs

trait Greet {
    fn hello(&self) -> String;
}

struct Person {
    name: String,
}

impl Greet for Person {
    fn hello(&self) -> String {
        format!("Hi, {}", self.name)
    }
}

fn main() {
    let p = Person { name: String::from("Ada") };
    let msg = p.hello();
    println!("{msg}");
}

trait `trait Greet` declares required methods.

impl Trait for Type `impl Greet for Person` provides the behavior.

method call `p.hello()` runs the implemented method.