"new class" and accessing outer this

[Kirk McDonald]

Henning Hasemann wrote:
> For those who don't know it: I'm talking here about the undocumented(?)
> new class { } - feature. I.e. You can do the following:
> 
> class Foo {
>  int bar() { return 5; }
> }
> 
> auto x = new class Foo {
>   int bar() { return 6; }
>   int foo() { return 7; }
> };
> 
> then x will hold an object of a class derived from Foo.
> 
> 
> Say I have a contstruct like this:
> 
> class Dispatcher {
>  // ...
> }
> 
> class Base {
>   Dispatcher dispatcher;
> }
> 
> class Something : Base {
>   this() {
>     dispatcher = new class Dispatcher {
>       void foo() {
>         // XXX
>       }
>     };
>   }
> } // class Something
> 
> 
> Now I want to access the "outer this" i.e. the instance of Something at
> the line I marked with XXX. Is this possible without a temporary
> variable that "renames" the outer this?
> (simply 'this' would refer to the inner, i.e. the object foo is a
> method of.)
> 
> Henning
> 

Nested class instances have an .outer property, for example:

class Something : Base {
   this() {
     dispatcher = new class Dispatcher {
       void foo() {
         this.outer.bar();
       }
     };
   }
   void bar() {}
}

-- 
Kirk McDonald
http://kirkmcdonald.blogspot.com
Pyd: Connecting D and Python
http://pyd.dsource.org