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Rust для начинающих — Обобщения и трейты (Traits)

Фрагмент из «Rust для начинающих»: Обобщения и трейты (Traits).

rust rustencyclopedia102 embed URL статья в энциклопедии
Rust main.rs 
trait Summary {
    fn summarize(&self) -> String;
}

struct NewsArticle {
    headline: String,
    location: String,
    author: String,
    content: String,
}

impl Summary for NewsArticle {
    fn summarize(&self) -> String {
        format!("{}, by {} ({})", self.headline, self.author, self.location)
    }
}
trait Summary {
    fn summarize(&self) -> String;
}

struct NewsArticle {
    headline: String,
    location: String,
    author: String,
    content: String,
}

impl Summary for NewsArticle {
    fn summarize(&self) -> String {
        format!("{}, by {} ({})", self.headline, self.author, self.location)
    }
}