Rustトレイト

トレイトは実装を抽象化したもの
trait トレイト {
fn 関数(引数);
fn 関数(引数);
}

trait Print {
	fn print(&self);
}

struct Person {
	name:String,
	mail:String,
	age:i32
}

impl Print for Person {
	fn print(&self) {
		println!("{}<{}>({}).", self.name, self.mail, self.age);
	}
}

fn person(name:String, mail:String, age:i32)-> Person {
	Person {name, mail, age}
}

struct Student {
	name:String,
	mail:String,
	grade:i32
}

impl Print for Student {
	fn print(&self) {
		println!("grade{}: {}<{}>.", self.grade, self.name, self.mail);
	}
}

fn student(name:String, mail:String, grade:i32)-> Student {
	Student {name, mail, grade}
}

fn main(){
	let taro = person {
		String::from("Taro"),
		String::from("taro@yamada"),
		39
	};
	let hanako = person {
		String::from("Hanako"),
		String::from("hanako@flower"),
		28
	};
	taro.print();
	hanako.print();
}

### 汎用トレイトとderive属性

#[derive(Debug)]
struct Person {
	name:String,
	mail:String,
	age:i32
}

#[derive(Debug)]
struct Student {
	name:String,
	mail:String,
	grade:i32
}

fn person(name:&str, mail:&str, age:i32)->Person {
	Person{name:String::from(name), mail:String::from(mail), age:age}
}

fn student(name:&str, mail:&str, grade:i32)->Student {
	Student{name:String::from(name), mail:String::from(mail), grade}
}

fn main() {
	let taro = person("Taro", "taro@yamada", 39);
	let hanako = student("Hanako", "hanako@flower", 2);
	println!("{:?}", taro);
	println!("{:?}", hanako);
}

trait Print {
	fn print(&self) {
		println!("PRINT is not yet implemented...");
	}
}

#[derive(Debug)]
struct Person {
	name:String,
	mail:String,
	age:i32
}

#[derive(Debug)]
struct Student {
	name:String,
	mail:String,
	grade:i32
}

impl Print for Person {
	fn print(&self) {
		println!("{}<{}>({}).", self.name, self.mail, self.age);
	}
}

impl Print for Student {}

fn person(name:&str, mail:&str, age:i32)->Person {
	Person{name:String::from(name), mail:String::from(mail), age:age}
}

fn student(name:&str, mail:&str, grade:i32)->Student {
	Student{name:String::from(name), mail:String::from(mail), grade}
}

fn main() {
	let taro = person("Taro", "taro@yamada", 39);
	let hanako = student("Hanako", "hanako@flower", 2);
	taro.print();
	hanako.print();
}