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!.POSTED!not-for-mail
From: "Jeffrey R. Carter" <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Running a preprocessor from GPS?
Date: Sat, 1 Aug 2015 23:07:59 -0700
Organization: Also freenews.netfront.net; news.tornevall.net;
 news.eternal-september.org
Message-ID: <mpkc11$7e5$2@dont-email.me>
References: <e610ca1e-4df6-4fbb-b3a1-ac35694d9072@googlegroups.com>
 <91f88d79-197c-419f-84a8-908e05967a2c@googlegroups.com>
 <d1tst3FoastU1@mid.individual.net> <mpcjpo$93v$1@dont-email.me>
 <135c2b00-d13c-4f5d-a586-8aca442d363b@googlegroups.com>
 <87380683vc.fsf@adaheads.sparre-andersen.dk>
 <347c6be9-c918-4bc0-9494-c93cd6740def@googlegroups.com>
 <mpdts2$72e$3@dont-email.me>
 <4cb32c40-f659-490d-bbb6-73585fc069e8@googlegroups.com>
 <mpfm1b$bif$5@dont-email.me> <mpgcma$hup$1@dont-email.me>
 <7e653a88-e690-431a-9df9-3fc691466e08@googlegroups.com>
 <lyzj2bo4pi.fsf@pushface.org>
 <25e8deb9-a967-4856-97cb-4257e1ba7fa4@googlegroups.com>
 <lyoairo1ao.fsf@pushface.org>
 <a7e26857-2ab6-4cc3-a9ef-f39d2f71a826@googlegroups.com>
 <d23pppF8puoU1@mid.individual.net>
 <84debe67-b26c-40c6-93ae-a2dec28f081b@googlegroups.com>
 <mpj0nq$6fc$1@dont-email.me>
 <c4d1c74a-dd8e-4e15-b73f-aa20cc398ce8@googlegroups.com>
 <mpji1s$8la$1@dont-email.me> <87twsijt8k.fsf@jester.gateway.sonic.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Injection-Date: Sun, 2 Aug 2015 06:06:27 +0000 (UTC)
Injection-Info: mx02.eternal-september.org;
 posting-host="ee44d3db9c41f5ad88d7e8e8f0268f05";
	logging-data="7621"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX19F+37TvkRNF2WYOJ10vHadhhTDoA25uHE="
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
 Thunderbird/38.1.0
In-Reply-To: <87twsijt8k.fsf@jester.gateway.sonic.net>
Cancel-Lock: sha1:YDWc9Tm6kSHBkF+0l/Iy4HaSOmw=
Xref: news.eternal-september.org comp.lang.ada:27318
Date: 2015-08-01T23:07:59-07:00
List-Id: <comp.lang.ada>

On 08/01/2015 07:53 PM, Paul Rubin wrote:
> 
> Singleton is sort of a misnomer.  It sounds like there is always exactly
> one instance, but it really means there is either one instance or zero
> instances.  There are zero when the program starts, but during the
> program's execution it may decide to create one instance.  The scheme
> you're describing with packages sounds like the one instance is created
> when the program starts.  It doesn't explain how to start with zero
> instances, and dynamically create one later.

Normally you don't care if you've allocated the pkg state and it's never used.
That's the normal Ada way. If there is some reason to avoid allocating the state
unless it's used, then you don't allocate the state until an operation is called.

-- 
Jeff Carter
"I don't know why I ever come in here. The
flies get the best of everything."
Never Give a Sucker an Even Break
102