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=unavailable autolearn_force=no version=3.4.4
Path: 
 eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!gandalf.srv.welterde.de!news.jacob-sparre.dk!loke.jacob-sparre.dk!pnx.dk!.POSTED!not-for-mail
From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Elaboration Question
Date: Mon, 5 Jan 2015 20:33:13 -0600
Organization: Jacob Sparre Andersen Research & Innovation
Message-ID: <m8fhha$1ig$1@loke.gir.dk>
References: <Xeopw.842131$No4.595859@fx19.iad>
 <_3spw.995330$Fo3.305798@fx09.iad>
 <176076d0-ca97-46b5-8b6f-81e9289643c4@googlegroups.com>
 <b99580ed-aff8-41f2-a125-35a695827d85@googlegroups.com>
 <cgoihuF7sr6U1@mid.individual.net>
NNTP-Posting-Host: rrsoftware.com
X-Trace: loke.gir.dk 1420511594 1616 24.196.82.226 (6 Jan 2015 02:33:14 GMT)
X-Complaints-To: news@jacob-sparre.dk
NNTP-Posting-Date: Tue, 6 Jan 2015 02:33:14 +0000 (UTC)
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.5931
X-RFC2646: Format=Flowed; Response
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157
Xref: news.eternal-september.org comp.lang.ada:24393
Date: 2015-01-05T20:33:13-06:00
List-Id: <comp.lang.ada>

"Niklas Holsti" <niklas.holsti@tidorum.invalid> wrote in message 
news:cgoihuF7sr6U1@mid.individual.net...
...
>> The onus is on the calling code to ensure elaboration happens
>> correctly.  The best strategy to use from the library-side is to just
>> make sure all your code is Preelaborate (or Pure), and the problem
>> solves itself.
>
> This advice probably works in practice, but formally speaking, I cannot 
> find a promise in the Ada RM (2012 version) that a Preelaborable library 
> unit is free of elaboration code.

You need to look in Annex C, specifically C.4 Preelaboration Requirements

But notice that just because a package is preelaborable doesn't 
automatically mean that no code is generated. That's only true in a limited 
set of circumstances (as outlined in C.4), and moreover, Annex C is optional 
so a compiler might not follow this subclause at all.

                                        Randy.