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-Language: ENGLISH,ASCII
X-Google-Thread: 103376,d67ca8d922a33c8a,start
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2004-02-29 17:55:28 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!news-stoc.telia.net!217.209.241.210.MISMATCH!news-stod.telia.net!telia.net!masternews.telia.net.!newsc.telia.net.POSTED!not-for-mail
From: =?ISO-8859-1?Q?Bj=F6rn_Persson?= <spam-away@nowhere.nil>
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.1) Gecko/20031114
X-Accept-Language: sv, en-us
MIME-Version: 1.0
Newsgroups: comp.lang.ada
Subject: Heterogenous array
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
Message-ID: <pIw0c.84623$dP1.233768@newsc.telia.net>
Date: Mon, 01 Mar 2004 01:53:25 GMT
NNTP-Posting-Host: 217.209.116.179
X-Complaints-To: abuse@telia.com
X-Trace: newsc.telia.net 1078106005 217.209.116.179 (Mon,
 01 Mar 2004 02:53:25 CET)
NNTP-Posting-Date: Mon, 01 Mar 2004 02:53:25 CET
Organization: Telia Internet
Xref: archiver1.google.com comp.lang.ada:5962
Date: 2004-03-01T01:53:25+00:00
List-Id: <comp.lang.ada>

I need an array type that can hold elements of different types. My=20
current attempt (somewhat simplified) is below. My question is, is there =

a way to do this without pointers?

    type T_Param_Type is (Int, Str);
    type Parameter_Definition(Param_Type : T_Param_Type) is record
       Name : A_Bounded_String_Type;
       case Param_Type is
          when Int =3D>
             Min : Integer;
             Max : Integer;
             Int_Value : Integer;
          when Str =3D>
             Str_Value : Ada.Strings.Unbounded.Unbounded_String;
       end case;
    end record;
    type Parameter_Definition_Pointer is access Parameter_Definition;
    type Parameter_Spec is array(Positive range <>) of
                           Parameter_Definition_Pointer;

"array(Positive range <>) of Parameter_Definition" gave me the error=20
"unconstrained element type in array declaration". I also tried a tagged =

type with subtypes and "array(Positive range <>) of=20
Parameter_Definition'Class", and got the same error.

This isn't really a dynamic data structure so I feel that pointers=20
shouldn't be necessary. Any ideas?

--=20
Bj=F6rn Persson

jor ers @sv ge.
b n_p son eri nu