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,FREEMAIL_FROM
	autolearn=unavailable autolearn_force=no version=3.4.4
X-Received: by 10.36.118.82 with SMTP id z79mr11504435itb.15.1510739787888;
        Wed, 15 Nov 2017 01:56:27 -0800 (PST)
X-Received: by 10.157.81.193 with SMTP id d1mr346969oth.13.1510739787788; Wed,
 15 Nov 2017 01:56:27 -0800 (PST)
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!news.kjsl.com!usenet.stanford.edu!m191no2405itg.0!news-out.google.com!x87ni5031ita.0!nntp.google.com!m191no2400itg.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
Newsgroups: comp.lang.ada
Date: Wed, 15 Nov 2017 01:56:27 -0800 (PST)
In-Reply-To: <oug7nc$l68$1@gioia.aioe.org>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=2003:c7:83c6:b004:346c:db87:7cc:b37e;
 posting-account=rmHyLAoAAADSQmMWJF0a_815Fdd96RDf
NNTP-Posting-Host: 2003:c7:83c6:b004:346c:db87:7cc:b37e
References: <oug7nc$l68$1@gioia.aioe.org>
User-Agent: G2/1.0
MIME-Version: 1.0
Message-ID: <4ae8faf8-6f06-4060-8f9b-ee792c454c62@googlegroups.com>
Subject: Re: Does variable creation need Elaborate_Body?
From: AdaMagica <christ-usch.grein@t-online.de>
Injection-Date: Wed, 15 Nov 2017 09:56:27 +0000
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Xref: feeder.eternal-september.org comp.lang.ada:48906
Date: 2017-11-15T01:56:27-08:00
List-Id: <comp.lang.ada>

Am Mittwoch, 15. November 2017 03:10:57 UTC+1 schrieb Victor Porton:
> package X is
>=20
>   -- pragma Elaborate_Body;
>=20
>   function F return Integer;
>=20
>   procedure Init;
>=20
> end X;
> ...
> Does it elaborate correctly without Elaborate_Body?

The problem here is not the variable V in the body. The problem is the func=
tion F returning some value (might be anything). If the body of X has been =
elaborated before the call of F, there is no elaboration problem; in your c=
ase, V may be uninitialized if Init has not yet be called.
If F is called before the body of X has been elaborated, you get Program_Er=
ror (elaboration check), because the body of F is not yet known. Elaborate_=
Body guarantees that the body of X is elaborated together with the spec.

This body of X has the same elaboration problem:

package body X is

  function F return Integer is
  begin
    return 1;
  end;

end X;