Rust 1.26 Sample

rust_1_26.rs

trait Animal {
    fn walk(&self);
}

struct Dog {
    pub name: String
}

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

struct Cat {
    pub name: String
}

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

fn test(cat: Cat) -> impl Animal {
    if cat.name == "Fussy" {
        cat
    } else {
        Cat { name: "Scooby".to_string() }
    }
}

fn main() {
    // let dog = Dog { name: "Snowy".to_string() };
    // let testedDog = test(dog);
    // testedDog.walk();
    let cat = Cat { name: "Fussy".to_string() };
    let testedCat = test(cat);
    testedCat.walk();
}

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