That's an entirely different concept imo. Overloading in Rust would be to have separate `Vec::new()` and `Vec::new(capacity: usize)` functions, which is not allowed.

Case in point: Java does allow exactly this, while also allowing classes to implement interfaces very similarly to how Rust structs can implement traits. Rust code sometimes uses traits to achieve similar results, like the `slice::get(index: SliceIndex<[T]>)` function, but the example above can't be done.