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From: "R. Stegers" <rstegers@cs.vu.nl>
Newsgroups: comp.lang.ada
Subject: Re: Parallel Merge Sort
Date: Mon, 18 Feb 2002 22:02:23 +0100
Organization: Fac. Wiskunde & Informatica, VU, Amsterdam
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Date: 2002-02-18T22:02:23+01:00
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Maybe someone can help me solve one final little issue.

The parallel Merge Sort works fine now. But when I want to use it I cannot
directly declare for example an integer array:

  package IntSort is new SORT_PACKAGE(integer, compareInt);
  use IntSort;

  -- This declaration does not work when I want to use ar as a parameter in
a call to Sort.
  ar : integer array(1..3);

  -- Instead I have to use this.
  ar : IntSort.element_array(1.. 3);

  sort(ar);

This is the declaration of the package:

  generic
    type element_type is private;
    with function "<=" (element1, element2 : element_type) return Boolean;
  package SORT_PACKAGE is

    type element_array is array(integer range <>) of element_type;

    procedure Sort(InArray : in out element_array);

    < ... >
  end SORT_PACKAGE;

I figured that since 'type' creates a new type, which cannot be interchanged
(?) with the original type I would have to use Subtype instead.
Unfortunately the compiler won't accept...

It's only a minor issue but if you want to do it right...

Does anybody know if it's possible??