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: fac41,2c6139ce13be9980 X-Google-Attributes: gidfac41,public X-Google-Thread: 103376,3d3f20d31be1c33a X-Google-Attributes: gid103376,public X-Google-Thread: f43e6,2c6139ce13be9980 X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,2c6139ce13be9980 X-Google-Attributes: gid1108a1,public From: kennel@nospam.lyapunov.ucsd.edu (Matt Kennel (Remove 'NOSPAM' to reply)) Subject: Re: Interface/Implementation (was Re: Design by Contract) Date: 1997/09/01 Message-ID: #1/1 X-Deja-AN: 269417726 References: <01bcb389$24f579d0$1c10d30a@ntwneil> Organization: The Avant-Garde of the Now, Ltd. Reply-To: kennel@NOSPAMlyapunov.ucsd.edu Newsgroups: comp.object,comp.software-eng,comp.lang.ada,comp.lang.eiffel Date: 1997-09-01T00:00:00+00:00 List-Id: On Thu, 28 Aug 1997 14:53:19 GMT, Tucker Taft :The hand-written Ada package spec (or even C header) remains a far :superior interface document for a given abstraction than is anything :I have seen extracted by a tool. The result of extraction by a tool :typically ends up getting some but not all of the comments, and the :various operations are not presented in necessarily a helpful order, :or with any useful higher-level organization. : :Basically, the extraction tool tends to tell you what an abstraction :"is" or "does", rather than what it is supposed to do, and why. :When trying to decide whether a given implementation is correct, :without that separate human-written spec, it is much harder to evaluate. :One is simply stuck trying to evaluate internal consistency, rather :than consistency against a separate human-written spec. I agree that these are important, but I don't see how Eiffel abstract classes are inadequate for this purpose. -- * Matthew B. Kennel/Institute for Nonlinear Science, UCSD * * According to California Assembly Bill 3320, it is now a criminal offense * to solicit any goods or services by email to a CA resident without * providing the business's legal name and complete street address. *