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=0.2 required=5.0 tests=BAYES_00,INVALID_MSGID, REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,8b8748382fcfacc1 X-Google-Attributes: gid103376,public From: Jeff Carter Subject: Re: friend classes in ada95 Date: 2000/04/19 Message-ID: <38FE365D.31C893A6@acm.org>#1/1 X-Deja-AN: 613360468 Content-Transfer-Encoding: 7bit References: <8dh37m$qef$2@wanadoo.fr> <3B5L4.1317$B43.116109@news.pacbell.net> <38FD1830.949F5E81@mindspring.com> <38FD1C9E.7C2B7756@research.canon.com.au> <8dldqi$mb7$1@nnrp1.deja.com> X-Accept-Language: en Content-Type: text/plain; charset=us-ascii X-Complaints-To: abuse@earthlink.net X-Trace: newsread1.prod.itd.earthlink.net 956187822 63.10.52.27 (Wed, 19 Apr 2000 16:43:42 PDT) Organization: EarthLink Inc. -- http://www.EarthLink.net MIME-Version: 1.0 Reply-To: jrcarter@acm.org NNTP-Posting-Date: Wed, 19 Apr 2000 16:43:42 PDT Newsgroups: comp.lang.ada Date: 2000-04-19T00:00:00+00:00 List-Id: Robert Dewar wrote: > > In article , > "Jeff Susanj" wrote: > > In OO a class is data and the operations associated with that > > data. > > This is a classical definition of an abstract data type, as > has been well understood since the early 60's. > > If you really accept this as a definition of object, then that > seems very very confused to me! Wirth, in accepting OO for Oberon, said that it's simply ADTs under another name. When I first looked into OO about 1984, once I finally understood what was going on, I didn't find anything new, except that the mechanism used made the code less readable than if composition had been used. I suspected that the OO people made up new terms for well established concepts such as type (class) and subprogram (methods) to mask this lack of original content. I later learned that class came from Simula, but have yet to learn any earlier use of method or message for subprogram or call. -- Jeff Carter "English bed-wetting types." Monty Python & the Holy Grail