السمات (Traits)

trait Summary {
    fn summarize(&self) -> String;
}

struct Article {
    title: String,
}

impl Summary for Article {
    fn summarize(&self) -> String {
        format!("مقال: {}", self.title)
    }
}

trait Greet {
    fn hello(&self) -> String {
        String::from("مرحبًا")   // افتراضي
    }
}

fn notify<T: Summary>(item: &T) {
    println!("{}", item.summarize());
}

#[derive(Debug, Clone)]
struct Point { x: i32, y: i32 }