From: Christian Szegedy <szegedy@...>
Date: 2002-09-06T20:50:32+09:00
Subject: Re: Ruby aesthetics

ts wrote:
>>>>>>"C" == Christian Szegedy <szegedy@nospam.or.uni-bonn.de> writes:
>>>>>
> 
> C> If you adapt this solution, then you will have to have the id of the class
> C> when wou compile the  def. (As I mentionned in my original mail).
> C> Is it an inherent problem?
> 
>  With
> 
>    class A
>       def a
>          @_m = 12
>       end
>    end
> 
>  when ruby _compile_ the def, the class A (i.e. the object) don't exist
> 
> 
> Guy Decoux
> 
> 

I think, I see a somewhat hacky but realistic solution:
I would modify eval.c where the nodes are evaluated and
(rb_add_method is added) the case DEFN of part of the huge switch.

I assume here that the method definition contains a reference
to a private member (otherwise no action is required, this could be
checked by a flag in the source tree stored for quick access while parsing)

Before the point where Ruby calls the rb_add_method, it copies the whole
subtree of the method definition and changes all nodes referencing the
private data members, and passes the root of the new subtree to
rb_add_method.

(Of course there are cleaner but less efficient solutions.)

Best regards, Christian