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: 103376,9e5138de1ea5afeb
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2002-03-07 00:54:21 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.esat.net!lnewspeer01.lnd.ops.eu.uu.net!emea.uu.net!news!not-for-mail
From: Nige <nigel.scott@uk.thalesgroup.com>
Newsgroups: comp.lang.ada
Subject: Re: Using controlled types to trace program execution
Date: Thu, 07 Mar 2002 08:56:05 +0000
Organization: Thales
Message-ID: <3C872B25.937014FD@uk.thalesgroup.com>
References: <3C7B9007.FB5F257D@uk.thalesgroup.com>
 <u8cck9q2rqrvbc@corp.supernews.com>
NNTP-Posting-Host: sswc014.int.rdel.co.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Trace: rdel.co.uk 1015491258 12241 172.16.10.25 (7 Mar 2002 08:54:18 GMT)
X-Complaints-To: postmaster@uk.thalesgroup.com
NNTP-Posting-Date: 7 Mar 2002 08:54:18 GMT
X-Mailer: Mozilla 4.77 [en] (X11; U; SunOS 5.6 sun4m)
X-Accept-Language: en
Xref: archiver1.google.com comp.lang.ada:20893
Date: 2002-03-07T08:54:18+00:00
List-Id: <comp.lang.ada>

Matthew Heaney wrote:
> 
> "Nige" <nigel.scott@uk.thalesgroup.com> wrote in message
> news:3C7B9007.FB5F257D@uk.thalesgroup.com...
> > procedure Something is
> >
> >   Here : Trace.Location ("Something");
> >
> > begin
> >   null;
> > end Something;
> 
> Try this:
> 
> with Ada.Finalization;
> package Trace is
> 
>    type Location (S : access String) is limited private;
> 
> private
> 
>    type Location (S : access String) is
>       new Ada.Finalization.Limited_Controlled with null record;
> 
>    procedure Initialize (L : in out Location);
>    procedure Finalize (L : in out Location);
> 
> end Trace;
> 
> with Trace;
> procedure Op is
>    S : aliased String := "Op";
>    Here : Trace.Location (S'Access);
> begin
>    null;
> end;
> 
> You have to declare the string object as aliased.  You don't need heap for
> what you're trying to do.

Thanks - that does solve my original problem, but what I was ultimately
after was a single declaration to keep it as simple as possible, the
idea being that as subprograms are created, a single line can be cut and
pasted into each one.

What I've got working now allows me to just do:

procedure Something is
  package Unit is new Trace;
begin
  null;
end Something;

Cheers,
Nige.