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From: "M. A. Alves" <maa@liacc.up.pt>
Newsgroups: comp.lang.ada
Subject: Re: Heterogenous_Array_Test
Date: Thu, 16 Aug 2001 19:06:33 +0000 (GMT)
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Date: 2001-08-16T19:06:33+00:00

So, the specific (coding) problem is fixed with type conversion:

  Child(Item(2).all).Child_Component := 22;

However, as was pointed out, that is not fully satisfactory an idiom (for
heterogenous arrays).  The really fine aproach is dispatching.  So I tried
to define dispatching procedures in the declarative part of the test
procedure---and it did not work!  Why?  Because

  *** dispatching subprograms must be defined in a package spec ***

I got this tiny but essential piece of knowledge as a warning from the
compiler (GNAT 3.13p) not before a good number of tries, so I thought I
should share it with you good folks.

_Now_ my original general problem (implementing an heterogenous array) is
solved.

Thanks all,

-- 
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