Rust: Objects

objects.rs

extern mod std;

use std::time;

struct User {
    name: ~str,
    age: int
}

impl User {

    fn new(name: ~str, age: int) -> User {
        User{name: name, age:age}
    }

    fn say_hi(&self) {
        println(fmt!("%s greets you.", self.name));
    }

    fn when(&self, age: int) -> int {
        if age < self.age { -1 }
        else { 1900 + (time::now().tm_year as int) + age - self.age }
    }
}

fn main() {
    //let u1 = User{name: ~"Bob", age: 36};
    let u1 = User::new(~"Bob", 36);
    u1.say_hi();

    println(fmt!("%s will be 40 in %d", u1.name, u1.when(40)));
}