Basic Trait Definitions

Snippet

Basic Trait Definitions

Traits define shared behavior that types can implement. They act like interfaces in other languages. The greet method takes self and returns a String. Types implement traits using impl Trait for Type syntax.

snippet.rs
rust
trait Greeting {
    fn greet(&self) -> String;
}
 
struct Person {
    name: String,
}
 
impl Greeting for Person {
    fn greet(&self) -> String {
        format!("Hello, {}!", self.name)
    }
}
 
fn main() {
    let person = Person { name: String::from("Anna") };
    println!("{}  ", person.greet());
}

Breakdown

trait Greeting { fn greet(&self) -> String; }

Defines a trait with one method signature

impl Greeting for Person { ... }

Implements the trait for the Person struct

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Basic Trait Definitions

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