Rust 1.25 Sample

rust_1_25.rs

trait Animal {
    fn walk(&self);
}

struct Dog {
    name: String
}

impl Animal for Dog {
    fn walk(&self) {
        println!("dog walks: {}", self.name);
    }
}

struct Cat {
    name: String
}

impl Animal for Cat {
    fn walk(&self) {
        println!("cat walks: {}", self.name);
    }
}

fn test<A: 'static + Animal>(animal: A) -> Box<Animal> {
    Box::new(animal)
}

fn main() {
    let animal = Dog { name: "Snowy".to_string() };
    let boxed = test(animal);
    (*boxed).walk();
}

fn test_num<'a>(a: &'a i32, b: &'a i32) -> &'a i32 {
    a
}