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NNTP-Posting-Date: Tue, 10 Jul 2007 01:27:00 -0500
From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: Translating C++ class types into Ada tagged types?
References: <1184038007.190905.237050@x35g2000prf.googlegroups.com>
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Date: 2007-07-10T01:27:00-05:00
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You can force the user to give an initial age by

 package Animals is
    type Cat(Initial_Age : Positive) is tagged private;
 ...
    type Cat(Initial_Age : Positive) is tagged record
       Age : Positive := Initial_Age;
    end record;
 ...
    Frisky : Animals.Cat(Initial_Age => 0);
If you want the initialization to be significantly more complicated
than that, you can make type Cat controlled, with Initialize and
Finalize procedures.