Trait Default Implementation

Provide default behavior for trait methods.

Difficulty

Intermediate

Code

trait Greet {
    fn name(&self) -> &str;

    fn greet(&self) {
        println!("Hello, I'm {}!", self.name());
    }
}

struct Cat { name: String }

impl Greet for Cat {
    fn name(&self) -> &str { &self.name }
}

fn main() {
    let cat = Cat { name: String::from("Whiskers") };
    cat.greet();
}

Explanation

Traits can have default method implementations.

Key Concepts

• Read the code carefully and understand the data flow
• Try modifying the example to see how it changes behavior
• Run this code in the Rust Playground

Related Topics

Browse more examples in the traits category to build a complete understanding of this topic.