nested class inheritance

[Paulo Pinto]

Am 14.07.2012 11:45, schrieb Gor Gyolchanyan:
> On Sat, Jul 14, 2012 at 1:36 PM, Guillaume Chatelet
> <chatelet.guillaume at gmail.com <mailto:chatelet.guillaume at gmail.com>> wrote:
>
>     On 07/13/12 21:41, Andrei Alexandrescu wrote:
>      > On 7/13/12 3:36 PM, Gor Gyolchanyan wrote:
>      >> The initial question was: why does DMD 2.059 reject this if this
>     makes
>      >> sense?
>      >> It's not even a new feature. It's a (possibly) new (and apparently
>      >> sensible) use case of an existing feature.
>      >
>      > I think the simple answer is there was no provision for it. The
>     feature
>      > copies the Java feature, and I don't think Java has something
>     like what
>      > you defined.
>      >
>      > Andrei
>      >
>
>     class Fruit {
>          class Seed {
>          }
>     }
>
>     class Apple extends Fruit {
>          class AppleSeed extends Fruit.Seed {
>              Apple getOuter() {
>                  return Apple.this;
>              }
>          }
>     }
>
>     class Main {
>          public static void main(String[] args) {
>              final Apple apple = new Apple();
>              final Apple.AppleSeed appleSeed = apple.new AppleSeed();
>              assert (appleSeed instanceof Fruit.Seed);
>              assert (apple == appleSeed.getOuter());
>              assert (appleSeed.getOuter() instanceof Apple);
>              assert (appleSeed.getOuter() instanceof Fruit);
>          }
>     }
>
>     This is valid Java code actually and I agree with Gor I would have
>     expected it to work with D.
>
>     Guillaume
>
>
> I didn't even know this worked in Java. This means, that nested classed
> in D can't translate nested classed in Java after all.
>

This usually comes up in certification and interview questions.