dynamic return type in Rust

dynamic_result.rs

// dynamic return type in Rust

#[derive(Clone)]
struct V {
    i:i32,
    s:String,
}

trait ToVal<T> {
    fn to_val(self) -> T;
}

impl ToVal<i32> for V {
    fn to_val(self) -> i32 {
        self.i
    }
}

impl ToVal<String> for V {
    fn to_val(self) -> String {
        self.s.clone()
    }
}

fn main() {
    let v = V{i:123, s:String::from("test string")};

    let i:i32 = v.clone().to_val();
    let s:String = v.clone().to_val();

    println!("{}, {}", i, s);
}