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: 103376,1c7098170d1fe6a5,start X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-06-12 12:33:17 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!fr.usenet-edu.net!usenet-edu.net!enst!enst.fr!not-for-mail From: "M. A. Alves" Newsgroups: comp.lang.ada Subject: Heterogenous_Array_Test: please explain error Date: Tue, 12 Jun 2001 21:32:33 +0100 (WEST) Organization: ENST, France Sender: comp.lang.ada-admin@ada.eu.org Message-ID: Reply-To: comp.lang.ada@ada.eu.org NNTP-Posting-Host: marvin.enst.fr Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Trace: avanie.enst.fr 992374394 64793 137.194.161.2 (12 Jun 2001 19:33:14 GMT) X-Complaints-To: usenet@enst.fr NNTP-Posting-Date: Tue, 12 Jun 2001 19:33:14 +0000 (UTC) To: comp.lang.ada@ada.eu.org Return-Path: Errors-To: comp.lang.ada-admin@ada.eu.org X-BeenThere: comp.lang.ada@ada.eu.org X-Mailman-Version: 2.0.4 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: comp.lang.ada mail<->news gateway List-Unsubscribe: , List-Archive: Errors-To: comp.lang.ada-admin@ada.eu.org X-BeenThere: comp.lang.ada@ada.eu.org Xref: archiver1.google.com comp.lang.ada:8623 Date: 2001-06-12T21:32:33+01:00 Isn't this the 'standard' way of implementing an heterogenous array? Why is it not working? Please explain the compiler's error on the last statement. Thanks. procedure Heterogenous_Array_Test is type Root is tagged record Root_Component: Integer := 0; end record; type Child is new Root with record Child_Component: Integer := 0; end record; type Class_Ptr is access Root'Class; Item: array(1 .. 2) of Class_Ptr := ( 1 => new Root, 2 => new Child); begin Item(1).Root_Component := 11; Item(2).Root_Component := 21; Item(2).Child_Component := 22; -- error: no selector "Child_Component" for type "Root'Class" end; -- , M A R I O data miner, LIACC, room 221 tel 351+226078830, ext 121 A M A D O Rua Campo Alegre, 823 fax 351+226003654 A L V E S P-4150 PORTO, Portugal mob 351+939354002