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,b1264e586250f470
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-07-08 10:46:19 PST
Path: archiver1.google.com!postnews1.google.com!not-for-mail
From: mheaney@on2.com (Matthew Heaney)
Newsgroups: comp.lang.ada
Subject: Re: Elaboration of nested generic package.
Date: 8 Jul 2003 10:46:18 -0700
Organization: http://groups.google.com/
Message-ID: <1ec946d1.0307080946.7e61cda9@posting.google.com>
References: <mailman.0.1057119854.328.comp.lang.ada@ada.eu.org>
 <5437fafb.0307071905.5d3bbc4e@posting.google.com>
NNTP-Posting-Host: 66.162.65.162
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: posting.google.com 1057686379 13704 127.0.0.1 (8 Jul 2003 17:46:19
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: 8 Jul 2003 17:46:19 GMT
Xref: archiver1.google.com comp.lang.ada:40130
Date: 2003-07-08T17:46:19+00:00
List-Id: <comp.lang.ada>

dlwester@hotmail.com (Don Westermeyer) wrote in message news:<5437fafb.0307071905.5d3bbc4e@posting.google.com>...
> christoph.grein@eurocopter.com wrote in message news:<mailman.0.1057119854.328.comp.lang.ada@ada.eu.org>...
> > 
> > There is no need to put pragma Elaborate_Body into the nested generic, because 
> > the body of Example also holds the body of Nested, and when the body of Example 
> > is elaborated, the body of Nested is inevitably elaborated as well.
> > 
> > What you cite in the style guide applies only to library generic units (or 
> > should that be generic library units :-):
> > http://www.adaic.org/docs/95style/html/sec_8/8-4-3.html

I don't think it matters much what the generic itself says.  Whenever
you instantiate a generic package, you should always Elaborate_All on
the with clause:

with GP;
pragma Elaborate_All (GP);  --you need this

package body Q is
   package P is new GP;
end Q;

See the CLA thread "AQ&S Guidance on pragma Elaborate_Body" which
occurred in 1997/04 -- particularly the responses from Bob Duff and
Robert Dewar.

I forget whether you need the pragma for root-level instantiations:

with GP;
pragma Elaborate_All (GP); --needed?
package P is new GP;

I don't think the pragma inside the generic declaration does very
much, except to indicate to the reader about whether the package uses
named access types, etc.  It's the Elaborate_All pragma that's
important for generics.

Perhaps Bob Duff can, er, elaborate.

-Matt