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=-1.9 required=5.0 tests=BAYES_00,LOTS_OF_MONEY autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,703b1789254e284a X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-02-02 16:36:50 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!newspeer.monmouth.com!priapus.visi.com!news-out.visi.com!hermes.visi.com!nnxp1.twtelecom.net!news-east.rr.com!chnws02.mediaone.net!chnws06.ne.mediaone.net!24.128.8.70!typhoon.ne.mediaone.net.POSTED!not-for-mail From: "Jeffrey Creem" Newsgroups: comp.lang.ada References: <5ee5b646.0202021451.226fab4@posting.google.com> Subject: Re: Rep Spec Report with ASIS X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: Date: Sun, 03 Feb 2002 00:34:15 GMT NNTP-Posting-Host: 66.31.5.146 X-Complaints-To: abuse@mediaone.net X-Trace: typhoon.ne.mediaone.net 1012696455 66.31.5.146 (Sat, 02 Feb 2002 19:34:15 EST) NNTP-Posting-Date: Sat, 02 Feb 2002 19:34:15 EST Organization: ATT Broadband Xref: archiver1.google.com comp.lang.ada:19545 Date: 2002-02-03T00:34:15+00:00 List-Id: Another approach for an ASIS implementation that does not support this capability (data representation section) would be to create an ASIS program who's output is a program that creates the output you want.... I have not done so there may be a few snags but in principal it seems like could be done. Of course it is more work than I've ever wanted (or been paid :) to undertake. "Robert Dewar" wrote in message news:5ee5b646.0202021451.226fab4@posting.google.com... > "John Cupak" wrote in message news:... > > > > So, I thought that there might be an ASIS program someone out there in > > "Ada Land" has written that might provide the information requested. I would > > think it wouldn't be terribly hard to walk throught the declarations, find > > record > > type definitions, and generate a Representation Specification Report for > > each > > one - would it? > > It would be virtually impossible unless the ASIS port you > are using supports the data representation section of the > ASIS standard, and this support is of course keyed to a > particular compiler. However, as far as I know, ASIS-for-GNAT is the > only implementation of ASIS that > supports this optional capability. > > The reason that this is virtually impossible is > > a) you would have to duplicate the entire data layout algorithms of > the compiler you are using, these algorithms > are often extremely extensive and complex. > > b) you would have to know what these algorithms are. I don't think any > compiler has sufficiently complete documentation to reliably duplicate > the data layout for > this purpose. > > We find that the -gnatR report that GNAT Pro can provide is > extremely useful, and a number of our customers very much > rely on this tool. The advantage here is that the compiler > is generating this information directly from the internal > data structures after laying out the data, so the output > from -gnatR is by definition exactly correct. > > So basically you are out of luck here if you are not using > GNAT. Why not talk to your vendor and see if they can do > something for you -- perhaps they have some equivalent > internal tools that they can be persuaded to cough up. > > (I say that because we find -gnatR enormously useful for > our support activities, and it is hard for me to imagine > how one would deal with things if you could not easily > tell how the compiler was laying things out). > > Robert Dewar > Ada Core Technologies