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From: Anonymous Coward <bogus_addy@bogus_domain.net>
Subject: Re: Default rep specs for record types - documented??
Date: Fri, 04 Nov 2005 04:11:18 GMT
Date: 2005-11-04T04:11:18+00:00	[thread overview]
Message-ID: <slrndmlus8.kq0.bogus_addy@tango.mindfuq.org> (raw)
In-Reply-To: meKdnXXIJd6tVPfeRVn-vw@comcast.com

In article <meKdnXXIJd6tVPfeRVn-vw@comcast.com>, Steve wrote:
> 
> Look in the Ada 95 LRM section 13, Representation Issues
> 
> Section 13.1 paragraph 19
> 
> If an aspect of representation of an entity is not specified, it is
> chosen by default in an unspecified manner.
> 
> So... if it matters, use a representation clause.

Thanks for the feedback.  Essentially what that is saying is that
there are no guarantees for what to expect from a default
representation.  It bothers me to read this, because it counters my
understanding - and counters what Cohen has written in ADA as a Second
Language.

  Example: Cohen states that enumerated types are guaranteed to have a
  representation that numbers the first element as zero, and increases
  sequentially.  Is this not really guaranteed?

What's disappointing is that rep specs add considerable clutter.
Readable code avoids redundancy, so having default representation
aspects that are guaranteed enable less noisey code.  I'm not looking
forward to rep specing records bit for bit simply to enforce the same
order of elements that's specified in the operation specs.



  reply	other threads:[~2005-11-04  4:11 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-11-04  2:21 Default rep specs for record types - documented?? Anonymous Coward
2005-11-04  2:36 ` Steve
2005-11-04  4:11   ` Anonymous Coward [this message]
2005-11-04  5:30     ` Jeffrey R. Carter
2005-11-05  3:13       ` Steve
2005-11-05  4:45         ` Jeffrey R. Carter
2005-11-06 14:05           ` Steve
2005-11-06 16:08             ` Anonymous Coward
2005-11-07  7:25             ` Jeffrey R. Carter
2005-11-08 13:36               ` Steve
2005-11-14  1:12             ` Robert A Duff
2005-11-14  3:03               ` Anonymous Coward
2005-11-14 18:08                 ` Jeffrey R. Carter
2005-11-14 18:49                 ` Robert A Duff
2005-11-15  1:16                   ` ADA compilers can reject types arbitrarily? Anonymous Coward
2005-11-15  2:10                     ` tmoran
2005-11-15  3:12                     ` Robert A Duff
2005-11-15  6:44                     ` Simon Wright
2005-11-16  0:16                       ` Adaists Deny Acronym. (was: ADA compilers can reject types arbitrarily?) Björn Persson
2005-11-16  5:38                         ` Adaists Deny Acronym Simon Wright
2005-11-16  6:16                         ` Adaists Deny Acronym. (was: ADA compilers can reject types arbitrarily?) Samuel Tardieu
2005-11-15 12:43                     ` ADA compilers can reject types arbitrarily? Jeff Creem
2005-11-14 21:14                 ` Default rep specs for record types - documented?? Simon Wright
2005-11-04 13:26     ` Stephen Leake
2005-11-04 14:33       ` Marc A. Criley
2005-11-04 18:35         ` Georg Bauhaus
2005-11-04 20:07           ` Britt Snodgrass
2005-11-04 14:39       ` Stephen Leake
2005-11-04 15:27         ` Britt Snodgrass
2005-11-04 15:55           ` Lauri Ora
2005-11-04 21:42             ` Larry Kilgallen
2005-11-05  2:26             ` Anonymous Coward
2005-11-05  2:42               ` Frank J. Lhota
2005-11-05  3:27               ` Ed Falis
2005-11-05  3:55                 ` Anonymous Coward
2005-11-05  4:07                 ` Lauri Ora
2005-11-05 13:46                   ` Ed Falis
2005-11-05 10:14                 ` Stephen Leake
2005-11-04 16:52         ` Frank J. Lhota
2005-11-04 16:57           ` Frank J. Lhota
2005-11-04 23:27           ` tmoran
2005-11-05 10:25           ` Stephen Leake
2005-11-14  1:09             ` Robert A Duff
2005-11-05  3:33       ` Anonymous Coward
2005-11-05 10:34         ` Stephen Leake
2005-11-05 16:35           ` ADA/C interfaces: type representations uncontrollable in C Anonymous Coward
2005-11-05 16:49             ` Ed Falis
2005-11-05 18:24             ` tmoran
2005-11-09  2:12           ` 'Size can mean value size OR object size, depending Anonymous Coward
2005-11-09  3:27             ` Jeffrey R. Carter
2005-11-09  4:04               ` Anonymous Coward
2005-11-05 14:27         ` Default rep specs for record types - documented?? Michael Bode
2005-11-05 16:17           ` pragma convention Anonymous Coward
2005-11-06  1:07             ` Jeffrey R. Carter
2005-11-06 22:22               ` Anonymous Coward
2005-11-07  7:34                 ` Jeffrey R. Carter
2005-11-05 14:39         ` Default rep specs for record types - documented?? Martin Krischik
2005-11-04  9:40   ` Martin Dowie
2005-11-04 14:36   ` Marc A. Criley
2005-11-04 17:45 ` Martin Krischik
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