Am 31.07.2005 um 21:35 schrieb Rudi Bichler:

> Hi,
>
> I need some kind of copyTo: functionality, which copies a complete  
> object (i.e. all instance variables) to another object. I need this  
> to "convert" an object of class A into an object of a subclass of  
> A. Something like:
>
> Object subclass: #MyClass
>  instanceVariableNames: 'var1 var2' ...
>
> MyClass subclass: #MySubcl
>  instanceVariableNames: 'var3' ...
>
> MySubcl class >> newCopyFrom: original
> "create an object of class MySubcl with is - as MyClass - identical  
> to original"
>
> An example of such a functionality is FormCanvas asBalloonCanvas.  
> This method is implemented by creating a BalloonCanvas and  
> initializing it "by hand". I am looking for a generic way -  
> something like copy in Object. Any idea?

Looking into the #copy method in Object you'll notice it calls  
#shallowCopy, which implements a generic copy of all instance  
variables - take a look!

- Bert -