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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD,
	FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: a07f3367d7,2e6723b897ab47fb
X-Google-Attributes: gida07f3367d7,public,usenet
X-Google-NewGroupId: yes
X-Google-Language: ENGLISH,ASCII-7-bit
Received: by 10.66.74.225 with SMTP id x1mr1428862pav.45.1344849117543;
        Mon, 13 Aug 2012 02:11:57 -0700 (PDT)
Path: 
 p10ni52838691pbh.1!nntp.google.com!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!news-in-01.newsfeed.easynews.com!easynews.com!easynews!novia!feeder3.cambriumusenet.nl!feeder1.cambriumusenet.nl!feed.tweaknews.nl!85.12.40.130.MISMATCH!xlned.com!feeder1.xlned.com!npeer.de.kpn-eurorings.net!npeer-ng0.de.kpn-eurorings.net!news-feed.eu.lambdanet.net!texta.sil.at!news.glorb.com!border3.nntp.dca.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail
From: Marius Amado-Alves <amado.alves@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada.Locales pseudo-string types
Date: Tue, 7 Aug 2012 06:14:13 -0700 (PDT)
Organization: http://groups.google.com
Message-ID: <ea9da3d6-6e53-485e-a298-6ccbb37e570d@googlegroups.com>
References: <78707b6e-88a3-453a-a37c-840f7a62e703@googlegroups.com>
 <bb54dcf1-da65-43d0-a3b4-418fa33de827@googlegroups.com>
 <jvp54k$mqk$1@dont-email.me>
 <m2sjbz24sh.fsf@nidhoggr.home>
 <7303f906-0f6a-4d97-ae15-36b4056ede6c@googlegroups.com>
 <m2obmn20xa.fsf@nidhoggr.home> <op.wim02msaka8ora@aspire.local>
 <c0cb9ef6-d049-44df-b184-9cf8aa6e2248@googlegroups.com>
 <257b4f44-b6c6-4c79-8c6e-dec947a3ce25@googlegroups.com>
NNTP-Posting-Host: 188.82.45.163
Mime-Version: 1.0
X-Trace: posting.google.com 1344345253 3920 127.0.0.1 (7 Aug 2012 13:14:13
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Tue, 7 Aug 2012 13:14:13 +0000 (UTC)
In-Reply-To: <257b4f44-b6c6-4c79-8c6e-dec947a3ce25@googlegroups.com>
Complaints-To: groups-abuse@google.com
Injection-Info: glegroupsg2000goo.googlegroups.com;
 posting-host=188.82.45.163;
 posting-account=3cDqWgoAAAAZXc8D3pDqwa77IryJ2nnY
User-Agent: G2/1.0
X-Received-Bytes: 2489
Content-Type: text/plain; charset=ISO-8859-1
Date: 2012-08-07T06:14:13-07:00
List-Id: <comp.lang.ada>

I took the chance to learn subtype aspect clauses, and changed Ada_Locales thus:

   subtype Country_Code is String (1 .. 2)
      with Static_Predicate =>
         Country_Code (1) in 'A' .. 'Z' and
         Country_Code (2) in 'A' .. 'Z';

(Now Text_IO.Put works of course, but I think it should work in the first place.)

This little experiment exposed other strange things:

(1) It seems the compiler accepts the type name, in the aspect clause, as a representative of a value of the type. I could not find this documented in the RM.

(2) The aspect clause does not seem to have effect. The following code compiles and runs normally.

   CC : Ada_Locales.Country_Code := "34";

Of course (2) can be an effect of the semantic void of (1).