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: f43e6,2c6139ce13be9980 X-Google-Attributes: gidf43e6,public X-Google-Thread: 1108a1,2c6139ce13be9980 X-Google-Attributes: gid1108a1,public X-Google-Thread: 103376,3d3f20d31be1c33a X-Google-Attributes: gid103376,public From: Ken Garlington Subject: Re: Interface/Implementation (was Re: Design by Contract) Date: 1997/09/14 Message-ID: <341B7749.749A@flash.net>#1/1 X-Deja-AN: 272307879 References: <340F20A0.49B5@ac3i.dseg.ti.com> <340F39E3.4B71@pseserv3.fw.hac.com> <5v32se$l7u$1@miranda.gmrc.gecm.com> Organization: Flashnet Communications, http://www.flash.net Reply-To: Ken.Garlington@computer.org Newsgroups: comp.object,comp.software-eng,comp.lang.ada,comp.lang.eiffel Date: 1997-09-14T00:00:00+00:00 List-Id: Paul Johnson wrote: > > Which is rather the point: does this lack of separate CM for interfaces > and implementation actually cause that much trouble in practice? Certainly, poor CM for interface definitions is one of the primary historical reasons for problems in the integration of large systems. I can think of at least one specific example on my last project, where two organizations built to different versions of an interface specification, and caused a problem that was not detected until the final system integration. The resulting rework was expensive in both finances and time. > In another thread I was criticised for claiming that the theoretical > foundation for Eiffel exception handling made it superior to Ada > exception handling. Now I'm being criticised for not recognising > separate interfaces as superior because they stem from another theory of > software engineering. I agree that separate CM of interfaces is better, > but I wonder if it makes enough difference to be worth while > implementing. I think there is sufficient practical experience that this is much more than a theory. > > Paul. > > --------------------------------+--------------------------------- > Paul Johnson | You are lost in a maze of twisty > Email: Paul@treetop.demon.co.uk | little standards, all different. > paul.johnson@gecm.com |