fn main() {
     Io {
    out: "",
    err: "",
}.out = "You can overload the assignment operator in Rust!";
    println!("{:p}", &std);
    std.out = "No, really! Check out the output of this program!";
    println!("{:p}", &std);
    std.err = "Warning: restrictions apply";
}


#[allow(non_upper_case_globals)]
const std : Io = Io {
    out: "",
    err: "",
};

struct Io {
    out: &'static str,
    err: &'static str,
}

impl Drop for Io {
    fn drop(&mut self) {
        println!("{}", self.out);
        eprintln!("{}", self.err);
    }
}