Array of subclasses

[Ali Çehreli via Digitalmars-d-learn]

On 10/21/2015 11:14 PM, DarkRiDDeR wrote:
> Hello. I have a class:
>
> abstract class Addon
> {
>      public activate(){...}
>      ...
> }
>
> its children:
>
> class A: Addon {... }
> class B: Addon {... }
>
> How do I create an array of subclasses Addon? For example, one could to
> do so:
>
> T[2] addons = [new A(), new B()];
> foreach(T addon; addons){
>      addon.activate();
> }
>
>

This works:

abstract class Addon {
     public void activate() {
     }
}

class A: Addon {}
class B: Addon {}

void main() {
     Addon[2] addons = [new A(), new B()];
}

This works too:

     Addon[] addons = [new A(), new B()];

I am happy to report that even the following works with dmd 2.069.0-b2:

     auto addons = [new A(), new B()];

I think the last one used to not work. Apparently now their "common 
type" is inferred correctly.

Ali