trait_operator.rs

struct Sponge {
    name: String,
}

impl std::ops::Add for Sponge {
    type Output = Self;
    fn add(self, other: Self) -> Self {
        Sponge {
            name: self.name + "X" + &other.name,
        }
    }
}

fn main() {
    let m1 = Sponge {
        name: "m1".to_string(),
    };
    let m2 = Sponge {
        name: "m2".to_string(),
    };

    let m3 = m1 + m2;
    println!("{}", m3.name);
}