Hi Doug:

>From dougo@ccs.neu.edu Fri Aug  1 16:33:24 1997
>From: Doug Orleans <dougo@ccs.neu.edu>
>To: Karl Lieberherr <lieber@ccs.neu.edu>
>Cc: dem@ccs.neu.edu
>Subject: Re: edge free strategies
>
>Karl Lieberherr writes:
> > Edge-free strategies can indeed be very useful, especially
> > with the adaptive methods which Doug is implementing now.
> > 
> > You can define a strategy with 10 nodes and then do a
> > 
> > before * (@ some code @)
> > 
> > and now all 10 classes will have a method with the interface
> > of the adaptive method and identical bodies.
> > 
> > So edge-free strategies are useful to distribute common methods
> > to a bunch of classes.
>
>I prefer this method:
>
>    * {
>	(@ void f() { /* some code */ } @)
>    }
>
>which will attach f to all classes.  Or you can specify a set of
>classes in place of "*".
>
>--Doug
>

This is a good method. I conclude that this means for Demeter/Java that
each strategy must contain at least one edge.

-- Karl