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: donh@syd.csa.com.au (Don Harrison) Subject: Re: Safety-critical development in Ada and Eiffel Date: 1997/08/15 Message-ID: #1/1 X-Deja-AN: 264509915 Sender: news@syd.csa.com.au X-Nntp-Posting-Host: dev50 References: Organization: CSC Australia, Sydney Reply-To: donh@syd.csa.com.au Newsgroups: comp.object,comp.software-eng,comp.lang.ada,comp.lang.eiffel Date: 1997-08-15T00:00:00+00:00 List-Id: Jon S Anthony wrote: :In article donh@syd.csa.com.au (Don Harrison) writes: : :> :The problem with this is the simple observation of "why would the :> :assertions be there in the first place?" After all, in the particular :> :case at hand, they were _intentionally_ removed. And with perfectly :> :sound engineering principles in mind. Assertions in the code _cannot_ :> :capture the constraints presumed for the context of use. This has to :> :come from somewhere else (external documentation, "instructions", :> :"warrenty notes", whatever.) The odd thing here is that this point :> :should be "blindingly obvious", to use one of your phrases. :> :> Yes, I agree it is. I'm talking about (an aspect of) how I think it :> *ought* to be done, not how it *was* done. : :The point is, the significant aspect of your "how it ought to be done" :is _impossible_. Not just wasn't done, not just impractical, but :outright impossible. But, perhaps, nowhere near as impossible as acheiving a mutual understanding as to what would and wouldn't have helped? :) :However, you and the E-Jihad have succeeded in wearing me down. I :give up. The whole thing is pointless. How disappointing. :) Don. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Don Harrison donh@syd.csa.com.au