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: 103376,d901a50a5adfec3c X-Google-Attributes: gid103376,public X-Google-Thread: 1094ba,9f0bf354542633fd X-Google-Attributes: gid1094ba,public From: jbs@yktvmv.watson.ibm.com Subject: Re: Fortran or Ada? Date: 1998/09/30 Message-ID: <19980929.214309.386@yktvmv.watson.ibm.com>#1/1 X-Deja-AN: 396189515 References: <36068E73.F0398C54@meca.polymtl.ca> <6u8r5o$aa4$1@nnrp1.dejanews.com> <360A3446.8AD84137@lmco.com> <6udre0$ha1$1@nnrp1.dejanews.com> <19980925.185359.250@yktvmv.watson.ibm.com> <6uifdr$dog$1@nnrp1.dejanews.com> <19980928.184428.604@yktvmv.watson.ibm.com> Organization: IBM Newsgroups: comp.lang.fortran,comp.lang.ada Date: 1998-09-30T00:00:00+00:00 List-Id: In article , on Tue, 29 Sep 1998 17:41:11 -0600, wclodius@lanl.gov (William B. Clodius) writes (in part): >In article <19980928.184428.604@yktvmv.watson.ibm.com>, >jbs@yktvmv.watson.ibm.com wrote: >> 2. It appears there is no cheap way of turning off conversion >> error checking in Ada, tempting programmers to leave it active in >> inappropriate places. >> > >While the default is to check errors, it is easy to identify postential >sources and turn them off. Note the programmers did that in several >cases, and deliberately chose not to do that in this case. > >See > >http://www.rvs.uni-bielefeld.de/~ladkin/Reports/ariane.html The accident report indicates that they deliberately chose not to do it in this case because they were worried about performance. This would seem to indicate that turning off the error check is not cheap (in terms of performance). James B. Shearer