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=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,583275b6950bf4e6
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-05-21 04:39:50 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!skynet.be!skynet.be!fu-berlin.de!uni-berlin.de!dialin-145-254-039-136.arcor-ip.NET!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Quality systems (Was: Using Ada for device drivers? (Was: the
   Ada mandate, and why it collapsed and died))
Date: Wed, 21 May 2003 13:42:08 +0200
Organization: At home
Message-ID: <bafoi4$rerai$2@ID-77047.news.dfncis.de>
References: <9fa75d42.0305141747.5680c577@posting.google.com>
 <3ec4b1c9$1@news.wineasy.se> <AFdxa.3805$3t6.46222@news.xtra.co.nz>
 <9fa75d42.0305161748.1735fc32@posting.google.com>
 <Ygixa.86459$cO3.5860233@bgtnsc04-news.ops.worldnet.att.net>
 <URWxa.143$Ov2.92@nwrddc04.gnilink.net>
 <ba9toc$qorbc$2@ID-175126.news.dfncis.de>
 <4W%xa.28765$cK5.11964@nwrdny02.gnilink.net>
 <baa486$qgclv$1@ID-175126.news.dfncis.de>
 <1053353256.804734@master.nyc.kbcfp.com>
 <baapuj$qs1sv$1@ID-175126.news.dfncis.de>
 <wccbrxxsinx.fsf@shell01.TheWorld.com>
Reply-To: mailbox@dmitry-kazakov.de
NNTP-Posting-Host: dialin-145-254-039-136.arcor-ip.net (145.254.39.136)
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7Bit
X-Trace: fu-berlin.de 1053517189 28798290 145.254.39.136 (16 [77047])
User-Agent: KNode/0.7.1
Xref: archiver1.google.com comp.lang.ada:37581
Date: 2003-05-21T13:42:08+02:00
List-Id: <comp.lang.ada>

Robert A Duff wrote:

> The design team actually went back and forth several times between two
> solutions: a kludgy "magic" package that supports unsigned types of
> certain sizes, pretty much like C, and a first-class type with syntax
> and relatively general semantics (including non-binary modulii).
> I think perhaps the magic package was the better solution.

What about:

1. arbitrary modulii without add, or, xor, not.

2. predefined boolean array types with bit-wise and arithmetic operations, 
packed, allowed for discriminants etc.

-- 
Regards,
Dmitry A. Kazakov
www.dmitry-kazakov.de