Inheriting from a nested class

[Frank Benoit]

llee schrieb:
> Is it possible to inherit from a nested class from outside of the enclosing class? For example:
> 
> class A
> {
>      class B { int x; }
> }
> 
> class C : B
> {
>      int get () { return x; }
> }
> 
> 

It should work if B is a static class and you refer to it with A.B .

class A
{
     static class B { int x; }
}

class C : A.B
{
     int get () { return x; }
}

If the class is not static, it has an implicit "this" pointer of the
surrounding class (like in Java), so you cannot create instances of
non-static B, if there is no instance of A. static make B independent of
this reference.