use std::ops::Add;

struct MyStruct(i32);
struct MyStructString(String);

impl Add for MyStruct {
    type Output = MyStruct;

    fn add(self, other: MyStruct) -> MyStruct {
        MyStruct(self.0 + other.0)
    }
}

impl Add for MyStructString {
    type Output = MyStructString;

    fn add(self, other: MyStructString) -> MyStructString {
        MyStructString(format!("{}{}", self.0, other.0))
    }
}

fn main() {
    let a = MyStruct(1);
    let b = MyStruct(2);
    let _c = a + b;

    let aa = MyStructString(String::from("A"));
    let bb = MyStructString(String::from("B"));
    let _cc = aa + bb;
}