[REBOL] Re: Refinements
From: jan:skibinski:sympatico:ca at: 13-Nov-2002 18:43
Joel,
> That leads me to wonder about giving each refinement an explicit
> logical value, which can be passed on easily (with a bit of typing
> effort, to be sure) ...
I have recently come to a similar conclusion, but for a bit different
reason: one cannot do direct logical operations on refinements.
For example, in the type checker I work on I have two refinements:
/debug and /step: the former is for me as a developer, the later for a
user
to show step-by-step reductions. But there are cases where
I would like to print the same mesage for either refinement.
I ended up defining the corresponding local logical variables
instead, so I can or- them together if needed. Moreover, I removed
the refinements from a worker function, and just call it with
explicit arguments 'debug and 'step. The worker is not to
be used directly (unless for a testing), so it does not make much
sense to maintain the refinements at that very low level.
Jan
