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: ffc1e,a48e5b99425d742a X-Google-Attributes: gidffc1e,public X-Google-Thread: fac41,a48e5b99425d742a X-Google-Attributes: gidfac41,public X-Google-Thread: 107d55,a48e5b99425d742a X-Google-Attributes: gid107d55,public X-Google-Thread: f43e6,a48e5b99425d742a X-Google-Attributes: gidf43e6,public X-Google-Thread: 103376,a48e5b99425d742a X-Google-Attributes: gid103376,public X-Google-Thread: 1108a1,5da92b52f6784b63 X-Google-Attributes: gid1108a1,public From: adaworks@netcom.com (AdaWorks) Subject: Re: Ariane-5 crash , Eiffel and Ada Date: 1997/04/08 Message-ID: #1/1 X-Deja-AN: 231709338 Sender: adaworks@netcom17.netcom.com References: <332B5495.167EB0E7@eiffel.com> <332D113B.4A64@calfp.co.uk> <5gjoel$jre$1@quasar.dimensional.com> <332EDBBE.4066@lmtas.lmco.com> <5gp49g$p7p$1@news.kersur.net> <3345cd60.2092398@news.sydney.apana.org.au> Followup-To: comp.lang.eiffel,comp.object,comp.software-eng,comp.programming.threads,comp.lang.ada,comp.lang.java.tech Organization: Netcom On-Line Services Newsgroups: comp.lang.eiffel,comp.object,comp.software-eng,comp.programming.threads,comp.lang.ada,comp.lang.java.tech Date: 1997-04-08T00:00:00+00:00 List-Id: rajt@gco.apana.org.au wrote: : >> And this is not the sort of thing that simple pre and post : >> conditions is going to help you with. It's disingenuous to say : >> otherwise. In fact, while this paper is fairly good in its analysis, : >> it is extremely poor in its conclusion. Here's the relevant bit: : >> : >> "Does this mean that the crash would automatically have been avoided : >> had the mission used a language and method supporting built-in : >> assertions and Design by Contract? Although it is always risky to : >> draw such after-the-fact conclusions, the answer is probably yes:" : I must regretfully agree that although the paper started off fairly : well, it rapidly degenerated into a ( fairly poor ) PR piece for : Eiffel. : Considering that "design by contract" ( Meyer's term for the use of : pre and post conditions ) is : 1. an _option_ in Eiffel : 2. equally available ( true the semantics and the integration are : _different_ from those in Eiffel ) in Ada : it seems fatuous to claim that Eiffel would have been the silver : bullet. : Raj Thomas : __________________________________________________________________________ : "It is a tremendous Mitzvah to always be happy! " : Reb Nachman of Breslov -- richard@adaworks.com AdaWorks Software Engineering Suite 30 2555 Park Boulevard Palo Alto, CA 94306 (415) 328-1815 FAX 328-1112