From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Thread: 103376,b8b8a54001adc4d2 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news4.google.com!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread1.news.pas.earthlink.net.POSTED!a6202946!not-for-mail From: Jeffrey Carter Organization: jrcarter commercial-at acm [period | full stop] org User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.3) Gecko/20040910 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Possible Ada deficiency? References: <1104516913.718856.94090@z14g2000cwz.googlegroups.com> <1105290947.422412.195950@c13g2000cwb.googlegroups.com> In-Reply-To: <1105290947.422412.195950@c13g2000cwb.googlegroups.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Date: Sun, 09 Jan 2005 19:01:03 GMT NNTP-Posting-Host: 63.186.48.200 X-Complaints-To: abuse@earthlink.net X-Trace: newsread1.news.pas.earthlink.net 1105297263 63.186.48.200 (Sun, 09 Jan 2005 11:01:03 PST) NNTP-Posting-Date: Sun, 09 Jan 2005 11:01:03 PST Xref: g2news1.google.com comp.lang.ada:7587 Date: 2005-01-09T19:01:03+00:00 List-Id: danmcleran@hotmail.com wrote: >>In any case, as some folks have pointed out, you should think of > "adding >>a child of X" as very similar to "modifying the source code of X". > > This is also spelled out in the Ada95 rationale. While I understand the > reasoning, I would also argue that it would be advantageous for a > package writer to have the power to restrict what child packages can > see and modify. > >>If you don't want people to do that, you need some extra-lingual >>mechanism to restrict them. > > That's exactly right. I would propose adding a new keyword, > 'concealed', to allow a package writer to hide certain areas from all > child packages. A trivial example: This is not an extra-lingual mechanism. As long as people can modify the source of the parent, there's no real point in restricting child packages any more than they already are. -- Jeff Carter "You cheesy lot of second-hand electric donkey-bottom biters." Monty Python & the Holy Grail 14