nested class inheritance

[Gor Gyolchanyan]

On Fri, Jul 13, 2012 at 11:59 PM, Era Scarecrow <rtcvb32 at yahoo.com> wrote:

> On Friday, 13 July 2012 at 19:35:34 UTC, Gor Gyolchanyan wrote:
>
>>
>> The seed can't be an interface because it needs to contain state. For
>> instance the progress towards becoming the respective fruit.
>>
>
>  The interface itself may not have state, but what uses the interface can
> have state. So i don't see an issue. Worse case you can use an abstract
> class which is a partial definition.
>
> interface Counter {
>   void addOne();
>   int getCount();
> }
>
> //A contains state and is both A and Counter.
> class A : Counter {
>   int x;
>   void addOne() {x++;}
>   void getCount() {return x;}
>
> }
>
>  The seed needs to be aware of the fruit it came from to access the
>> fruit's DNA to inherit the traits of that fruit when it grows into a fruit
>> of its own. (Please note, that it's just an example).
>>
>
>  A fruit can have multiple such seeds, each of which must have it's own
>> state and connection to the same fruit they came from.
>>
>
> so far...
>
> class Fruit {
>  class Seed {
>   class Apple {}
>  }
> }
>
>
>> So, we start off by inheriting from Fruit, defining the properties of
>> that fruit (It's an Apple, it's delicious and it goes great in a pie). Then
>> we define several different types of Apple seeds, each of which need access
>> to the apple.
>>
>
> Hmmm...
> interface Seed {}
>
> class Fruit {
>   class Appleseed : Seed {
>     class Apple {}
>   }
>
>   //or?
>   static class Apple {
>     class AppleSeed : Seed {} //multiple seeds, but need Fruit access?
>   }
> }
>
> or perhaps...?
>
> interface Seed{}
> interface Fruit{}
>
> //Apple knows it's a fruit..
> class Apple : Fruit {
>   //Appleseed is from the Apple (which is a fruit as well)
>   //Appleseed is a seed, we can have multiple seeds from Apple, all which
> know
>   //all about Apple's (and basic fruits) but not about non-appple seeds.
>   class Appleseed : Seed {
>   }
> }
>

The seed itself must have private state, or else it would violate
encapsulation and require nasty mixins.
And as I said, fruit can't know about apple.

-- 
Bye,
Gor Gyolchanyan.
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