super constructors: I can't take it anymore!

[Serg Kovrov]

* Regan Heath:
> import std.stdio;
> 
> typedef int function(int i) WNDPROC;
> 
> class BaseWindow
> {
>     void register(char[] cname) { writefln("register(",cname,")"); }
>     void create(int function(int) f) { writefln("create(",f(1),")"); }
>     
>     char[] classname() { return "BaseWindow"; }
>     WNDPROC windproc() { return cast(WNDPROC)function int(int i){return 
> i;}; }
>     
>     this() { register(classname()); create(windproc()); }
> }
> 
> class FrameWindow : BaseWindow
> {
>     override char[] classname() { return "FrameWindow"; }
>     override WNDPROC windproc() { return cast(WNDPROC)function int(int 
> i){return i*2;}; }
> }
> 
> void main()
> {
>     FrameWindow b = new FrameWindow();
>     BaseWindow a = new BaseWindow();
> }

Thank you, Regan.

This is pretty good looking solution. Seems all solutions are about to 
avoid using constructors in subclasses at all.

Sadly, constructors appears to be weak in D. I wish some day it will be 
changed.

-- 
serg.