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 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,32e730fd939a8067
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news1.google.com!postnews.google.com!g44g2000cwa.googlegroups.com!not-for-mail
From: invalidemail@aerojockey.com
Newsgroups: comp.lang.ada
Subject: Re: changing alignment of built-in boolean
Date: 16 Oct 2005 10:48:15 -0700
Organization: http://groups.google.com
Message-ID: <1129484895.726188.61070@g44g2000cwa.googlegroups.com>
References: <1129320236.007525.185300@g44g2000cwa.googlegroups.com>
   <Nv14f.1603$hY6.1538@newsread1.news.pas.earthlink.net>
NNTP-Posting-Host: 65.29.206.183
Mime-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
X-Trace: posting.google.com 1129484901 28239 127.0.0.1 (16 Oct 2005 17:48:21
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Sun, 16 Oct 2005 17:48:21 +0000 (UTC)
In-Reply-To: <Nv14f.1603$hY6.1538@newsread1.news.pas.earthlink.net>
User-Agent: G2/0.2
X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; en-US;
 rv:1.7.6) Gecko/20050225 Firefox/1.0.1,gzip(gfe),gzip(gfe)
Complaints-To: groups-abuse@google.com
Injection-Info: g44g2000cwa.googlegroups.com; posting-host=65.29.206.183;
   posting-account=ic31RQwAAADG2g1NjWUVIsXdf0Dq_CbQ
Xref: g2news1.google.com comp.lang.ada:5728
Date: 2005-10-16T10:48:15-07:00
List-Id: <comp.lang.ada>


Jeffrey R. Carter wrote:
> invalidemail@aerojockey.com wrote:
> > Is it possible, in GNAT, to force the built-in Boolean type to use
> > 4-byte (32-bit) alignment?  Reason: I have to interface some Ada code
> > to a package that insists on 32-bit variables on 4-byte-aligned
> > addresses.
>
> You could always modify the compiler :)
>
> You might want to look at user-defined boolean types here (it's sometimes a
> little confusing in Ada to distinguish between integer types and type Integer,
> character types and type Character, string types and type String, boolean types
> and type Boolean):
>
> type Big_Boolean is new Boolean;
> for Big_Boolean'Size use 32;
> for Big_Boolean'Alignment use 4;
>
> Conditions can be of any boolean type, so you can use this just like type Boolean:

Yes, but there appears to be one little catch:

   if B and then (Some_Integer /= 0) then ...

Unfortunately I got stuff like this all over the Ada code :(  Otherwise
this would be something I could do with a simple search and replace.
Maybe there's a flag to loosen the type checking for this case.
Probably not.  Oh well.

Thanks.