Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!purdue!decwrl!ucbvax!SUN.COM!wmb
From: wmb@SUN.COM
Newsgroups: comp.lang.forth
Subject: Re: Encapsulation and visibility in Forth
Message-ID: <8908041409.AA10840@jade.berkeley.edu>
Date: 3 Aug 89 22:15:59 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: Forth Interest Group International List <FIGI-L%SCFVM.bitnet@jade.berkeley.edu>
Organization: The Internet
Lines: 13

One technique I have used:  For each "module", create two
vocabularies, one for the visible words in the module, and
one for the private words.  The private vocabulary is contained
within the public vocabulary.  That way, you see the private
words only if you want to.

For example, I wrote a DOS-compatible file system in Forth.  The
interface words for the file system were contained within
a vocabulary  "dosfiles" .  Within the "dosfiles" vocabulary, there
was another vocabulary named "doshidden" , which contained the
implementation factors.

Mitch