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=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fac41,b87849933931bc93 X-Google-Attributes: gidfac41,public X-Google-Thread: 114809,b87849933931bc93 X-Google-Attributes: gid114809,public X-Google-Thread: 1108a1,b87849933931bc93 X-Google-Attributes: gid1108a1,public X-Google-Thread: 103376,b87849933931bc93 X-Google-Attributes: gid103376,public X-Google-Thread: 109fba,b87849933931bc93 X-Google-Attributes: gid109fba,public From: jsa@alexandria (Jon S Anthony) Subject: Re: OO, C++, and something much better! Date: 1997/02/24 Message-ID: #1/1 X-Deja-AN: 221176384 Distribution: world References: <5bphq4$5js@mulga.cs.mu.OZ.AU> Organization: PSI Public Usenet Link Newsgroups: comp.lang.eiffel,comp.lang.ada,comp.lang.c++,comp.lang.smalltalk,comp.object Date: 1997-02-24T00:00:00+00:00 List-Id: In article Brian Rogoff writes: > On 21 Feb 1997, Eric W. Nikitin wrote: > > A language derived from Oberon, Lagoona, goes on to provide an additional > > feature called categories which are distinct from type, but allow > > different types to be related via similar behaviors. ( Categories > > are similar to protocals in Objective-C and interfaces in Java ). > > Something similar to this is provided in Ada by using generic > packages with empty bodies. For example Isn't this Lagoona category aspect basically the same as Class in Ada? A family of related types? /Jon -- Jon Anthony Organon Motives, Inc. Belmont, MA 02178 617.484.3383 jsa@organon.com