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: f43e6,b87849933931bc93 X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,b87849933931bc93 X-Google-Attributes: gid1108a1,public X-Google-Thread: 109fba,b87849933931bc93 X-Google-Attributes: gid109fba,public X-Google-Thread: 114809,b87849933931bc93 X-Google-Attributes: gid114809,public X-Google-Thread: fac41,b87849933931bc93 X-Google-Attributes: gidfac41,public X-Google-Thread: 103376,b87849933931bc93 X-Google-Attributes: gid103376,public From: pcg@aber.ac.uk (Piercarlo Grandi) Subject: Re: What is wrong with OO ? Date: 1997/01/12 Message-ID: #1/1 X-Deja-AN: 209516439 sender: pcg@osfb.aber.ac.uk references: <5acjtn$5uj@news3.digex.net> <32D11FD3.41C6@wi.leidenuniv.nl> <32D53473.4DAA423A@eiffel.com> organization: Prifysgol Cymru, Aberystwyth newsgroups: comp.lang.c++,comp.lang.smalltalk,comp.lang.eiffel,comp.lang.ada,comp.object,comp.software-eng Date: 1997-01-12T00:00:00+00:00 List-Id: >>> "eachus" == Robert I Eachus writes: [ ... interesting discussion on Ada generics and inling and OO ... ] eachus> As I pointed out, this is because the Ada type model sees classes eachus> as sets of types all having a specific set of operations. [ eachus> ... ] eachus> In Eiffel, even though the actual concept of class is very eachus> similar, the model is explicitly hierarchical. [ ... ] Let me put here a warning to the reader: this is true only in a certain sense that is apparent to those familiar with the Ada 95 usage of the word "class"; in Ada 95 the word "class" denotes something more like what is called a "protocol", for example in ``Smalltalk''-like languages, or rather the classes that share a protocol, while "class" in most OO languages means a single instantiable module/type.