Is there a way to overload "()"?

I wonder if there is a way to overload parenthesis in rust, like this:
```rust
let  x = MyStrcut();

let y = x();// or more complex like  let y = x(1,"dd");
```

I know how to overload arithmetic and "[]", but not the case of parenthesis.

(I know here may not be the right place to ask this. But I just googled and found your crate. Hope this could give your crate some population.^_^)
