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=-2.9 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=unavailable autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,195bd8ec4227e968 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2004-02-08 17:00:07 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!nntp.cs.ubc.ca!freenix!enst.fr!melchior!cuivre.fr.eu.org!melchior.frmug.org!not-for-mail From: Stephen Leake Newsgroups: comp.lang.ada Subject: Re: [Q] non-limited record and "self-pointer" Date: 08 Feb 2004 19:58:00 -0500 Organization: Cuivre, Argent, Or Message-ID: References: <86d68pl0tc.fsf@sonnenregen.at.home> NNTP-Posting-Host: lovelace.ada-france.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: melchior.cuivre.fr.eu.org 1076288311 70209 80.67.180.195 (9 Feb 2004 00:58:31 GMT) X-Complaints-To: usenet@melchior.cuivre.fr.eu.org NNTP-Posting-Date: Mon, 9 Feb 2004 00:58:31 +0000 (UTC) To: comp.lang.ada@ada-france.org Return-Path: In-Reply-To: <86d68pl0tc.fsf@sonnenregen.at.home> User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 X-Virus-Scanned: by amavisd-new-20030616-p5 (Debian) at ada-france.org X-BeenThere: comp.lang.ada@ada-france.org X-Mailman-Version: 2.1.3 Precedence: list List-Id: Gateway to the comp.lang.ada Usenet newsgroup List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Xref: archiver1.google.com comp.lang.ada:5354 Date: 2004-02-08T19:58:00-05:00 Georg Bauhaus writes: > Is there any circumstance which might allow the following type > (Read_Only_Set) to be o.K.? The record isn't limited, the compiler > does not complain unless I remove the "container" component. It says > then that for correct instantiation the current instance must be a > limited type. Which has some words that I had thought it could say. I'm not clear what you are asking. The prefix of 'Access or 'Unchecked_Access must be aliased. ARM 3.10 (9) says the current instance of a limited type is aliased. Sor for 'Unchecked_Access to be legal, Read_Only_Set must be limited. Apparently the compiler thinks including teh Container component makes Read_Only_Set limited. But in the version of Charles I have, Charles.Sets.Sorted.Unbounded.Container_Type is not limited. So that's a puzzle. What does your version of Charles say? > package Implementation is > new Charles.Sets.Sorted.Unbounded(Element); > -- (Element is generic formal private) > > type Read_Only_Set is tagged <-- not limited > record > container: Implementation.Container_Type; > > -- line 102: > self: Set_Ptr := Read_Only_Set'unchecked_access; <-- no complaints > -- used in value_in_place -- -- Stephe