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,fd3a5ba6349a6060 X-Google-Attributes: gid103376,public From: William Clodius Subject: Re: should I be interested in ada? Date: 1999/02/19 Message-ID: <36CD839F.ABD@lanl.gov>#1/1 X-Deja-AN: 446100244 Content-Transfer-Encoding: 7bit References: <7a72e6$g55$1@probity.mcc.ac.uk> <36C93BB4.1429@ecs.soton.ac.uk> <7afc1o$3mi$2@plug.news.pipex.net> <7afttr$7v3$1@nnrp1.dejanews.com> <7aganu$qsc$1@plug.news.pipex.net> <7ai4rb$5vn$1@nnrp1.dejanews.com> <7aingo$orv$2@plug.news.pipex.net> <7ajl7i$e8v$1@nnrp1.dejanews.com> Content-Type: text/plain; charset=us-ascii Organization: Los Alamos National Lab Mime-Version: 1.0 Newsgroups: comp.lang.ada Date: 1999-02-19T00:00:00+00:00 List-Id: robert_dewar@my-dejanews.com wrote: > > Obvious example; a parallel loop with no implied ordering > in the sequence. We once extensively discussed the > following addition to Ada: > > for all J in ... loop ... > > with that meaning. Without an extension, there is simply > no "reasonably easy" way to program this in Ada. > > (actually I am not sure if Fortran-90 has this extension, > but it is certainly in HPF, and really these days you have > to be talking about both if you are talking state of the > art Fortran). > > Doesn't Fortran also have slicing of multi-dimensional > arrays, this is also obviously very painful in Ada. > The current standard is Fortran 95 (accepted as a standard in 1997) which adopted FORALL from HPF. It was also one of many proposals for Fortran 8x that was discarded in the attempt to have a complete standard by 1988. There are many possible forms of array slices, the more complex forms rely on FORALL or WHERE on a per statement basis. Simple ones can be done with variables with Fortran's "POINTER" attribute, with procedure or module scope, or by a simple array notation on a per statement basis. Note the HPF directives have not been adopted by the Fortran standard. -- William B. Clodius Phone: (505)-665-9370 Los Alamos Nat. Lab., NIS-2 FAX: (505)-667-3815 PO Box 1663, MS-C323 Group office: (505)-667-5776 Los Alamos, NM 87545 Email: wclodius@lanl.gov