Re: multiple inheritance

[Timon Gehr]

On 07/08/2012 07:31 PM, Namespace wrote:

How can i implement C++ behaviour like this:

class Shape : Drawable, Transformable {
class Sprite : Drawable {
class Image : Transformable {
?

One way is to declare Transformable or Drawable as interface.
But what if i have more then one class which implements
Transformable/Drawable and i wouldn't rewrite the implementation of
Transformable/Drawable in every class again?

Depending on what exactly your use case is, this might get you going:

class Shape : Drawable {
    protected class MyTransformable : Transformable{
        // ...
        // (can reference all fields of the enclosing class object)
    }

    Transformable transformable;
    alias transformable this;

    this() { transformable = new MyTransformable(); }
    // ...
}