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-Thread: 103376,8e7ac81a215f128c
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,UTF8
Path: 
 g2news2.google.com!news4.google.com!feeder.news-service.com!85.214.198.2.MISMATCH!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From: "J-P. Rosen" <rosen@adalog.fr>
Newsgroups: comp.lang.ada
Subject: Re: Using Red-Black Trees
Date: Thu, 18 Nov 2010 07:27:20 +0100
Organization: Adalog
Message-ID: <ic2h0f$g7$1@news.eternal-september.org>
References: <2419e829-6f45-4075-9005-b9876beb8aaa@r6g2000vbf.googlegroups.com>
 <ibm2op$m1i$1@news.eternal-september.org> <ibsd7q$nru$1@munin.nbi.dk>
 <46306fd9-21dc-40df-88e7-fc7e568399a4@k11g2000vbf.googlegroups.com>
 <ibueau$aac$1@news.eternal-september.org> <ibuncm$a1n$1@munin.nbi.dk>
 <ibvfst$pgb$1@news.eternal-september.org>
 <df137fe2-722f-48d5-aa66-3d32dc745cb0@j9g2000vbr.googlegroups.com>
 <op.vmb7gzyxule2fv@garhos> <op.vmb77lp0lzeukk@jellix.jlfencey.com>
 <op.vmb9btjnule2fv@garhos>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Thu, 18 Nov 2010 06:27:27 +0000 (UTC)
Injection-Info: mx01.eternal-september.org;
 posting-host="z/xN1DBP8RUb+r9ug/i0hg";
	logging-data="519"; mail-complaints-to="abuse@eternal-september.org";
	posting-account="U2FsdGVkX1/04VFZ2xf4ZsH7tSJbX+dz"
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr;
 rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6
In-Reply-To: <op.vmb9btjnule2fv@garhos>
Cancel-Lock: sha1:QmasOdPChULfEhQq4fQK75YA1fQ=
Xref: g2news2.google.com comp.lang.ada:16541
Date: 2010-11-18T07:27:20+01:00
List-Id: <comp.lang.ada>

Le 18/11/2010 00:39, Yannick Duchêne (Hibou57) a écrit :
> You can have only one at a time. If you select an implementation, you
> select it system-wide, and you cannot select one for that usage and
> another for another usage in the same system.
> 
If that's really what you want, there is an easy solution.
Provide two packages with identical (or compatible enough for your
purpose) specifications:

package Binary_Tree is....
package Linked_List is....

Then declare at library level:
with Binary_Tree;
package My_Structure renames Binary_Tree;

And then, use My_Structure all over the place. By changing two words in
one two-line file, you can switch your entire project to the other
implementation.

-- 
---------------------------------------------------------
           J-P. Rosen (rosen@adalog.fr)
Adalog a déménagé / Adalog has moved:
2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX
Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00