类似接口，但和php中的trait又有点不一样。
pub trait Summary { fn summarize(&self) -> String; } pub struct NewArticle { pub headline: String, pub author: String, } pub struct Tweet { pub username: String, pub content: String, pub reply: bool, pub retweet: bool, } impl Summary for Tweet { fn summarize(&self) -> String { format!("{}: {}", self.username, self.content) } } impl Summary for NewArticle { fn summarize(&self) -> String { format!("{}, by {}", self.headline, self.author) } } fn main() { let tweet = Tweet { username: String::from("horse_ebooks"), content: String::from("of course, as you problem already know, people"), reply: false, retweet: false, }; println!("1 new tweet: {}", tweet.summarize()); let article = NewArticle { headline: String::from("all will be ok"), author: String::from("sky chan"), }; println!("1 new article: {}", article.summarize()); }转载于:https://www.cnblogs.com/aguncn/p/11409380.html
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