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: fac41,2c6139ce13be9980 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: jsa@alexandria.organon.com (Jon S Anthony) Subject: Re: Interface/Implementation (was Re: Design by Contract) Date: 1997/08/28 Message-ID: #1/1 X-Deja-AN: 268829389 Distribution: world References: <33E9ADE9.4709@flash.net> <34023BC4.2781E494@eiffel.com> <3402d123.0@news.uni-ulm.de> <3402DA6A.C4444E46@calfp.co.uk> <3402e51d.0@news.uni-ulm.de> <3402E8C9.3384D976@calfp.co.uk> <3403F668.F6B57D97@calfp.co.uk> <34041331.0@news.uni-ulm.de> <3404696D.4487EB71@eiffel.com> <34046FAD.52BFA1D7@eiffel.com> <34048FDC.13728473@eiffel.com> <3404909F.2C67412E@eiffel.com> Organization: PSINet Newsgroups: comp.object,comp.software-eng,comp.lang.ada,comp.lang.eiffel Date: 1997-08-28T00:00:00+00:00 List-Id: In article <3404909F.2C67412E@eiffel.com> Bertrand Meyer writes: > G4. Allow multiple implementations of a given > interface, including the possibility for > clients to switch easily and implicitly > between various implementations at run time > (not possible, at least not possible simply, > in Modula/Ada). This of course will take advantage > of polymorphism and dynamic binding. More to the point: not _relevant_ in the Ada case as this is handled by a different orthogonal capability (instead of conflating it with module as in Eiffel). /Jon -- Jon Anthony OMI, Belmont, MA 02178, 617.484.3383 "Nightmares - Ha! The way my life's been going lately, Who'd notice?" -- Londo Mollari