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-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,a691dc29968966aa
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-03-19 08:56:43 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!hammer.uoregon.edu!skates!not-for-mail
From: Stephen Leake <Stephen.A.Leake@nasa.gov>
Newsgroups: comp.lang.ada
Subject: Re: pragma Import with 'Address clause
Date: 19 Mar 2003 11:51:39 -0500
Organization: NASA Goddard Space Flight Center (skates.gsfc.nasa.gov)
Message-ID: <uof47z4dg.fsf@nasa.gov>
References: <slrnb7guml.nt.lutz@taranis.iks-jena.de>
NNTP-Posting-Host: anarres.gsfc.nasa.gov
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: skates.gsfc.nasa.gov 1048093558 25314 128.183.235.92 (19 Mar 2003
 17:05:58 GMT)
X-Complaints-To: usenet@news.gsfc.nasa.gov
NNTP-Posting-Date: 19 Mar 2003 17:05:58 GMT
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2
Xref: archiver1.google.com comp.lang.ada:35516
Date: 2003-03-19T17:05:58+00:00
List-Id: <comp.lang.ada>

Lutz Donnerhacke <lutz@iks-jena.de> writes:

> A common technique to reinterpret data is:
>   a : AT;
>   [...]
>   b : BT;
>   for b'Address use a'Address;
>   pragma Import(Ada, b);
> 
> Is the "pragma Import" really necessary? Of course, the ARM says, that
> elaboration and definition of the imported object is externally defined. So
> they are omitted from the Ada code itself.
> 
> Assume BT is a record without any default expressions. Does this mean, the
> pragma can be omitted from the source code?
> 
> Background: Spark prohibits the use of Pragma Import on objects.

I would hope Spark would prohibit the address clause as well! you are
totally defeating the Ada type system!

-- 
-- Stephe