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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
Newsgroups: comp.lang.ada
Subject: Re: Is this expected behavior or not
Date: Wed, 13 Mar 2013 14:47:23 -0700
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Date: 2013-03-13T14:47:23-07:00
List-Id: <comp.lang.ada>

On 03/13/2013 12:54 PM, Simon Wright wrote:
>
> Out of over 200 packages I have only one with this construct: it is a
> signature package, no need for 'Pred or 'Succ (in other words, the
> enumeration defines a set of distinct possibilities, ordering
> irrelevant).

The sorting algorithms in the PragmAda Reusable Components have a generic formal 
part like

generic -- PragmARC.Sort_Heap
    type Element  is private;
    type Index    is (<>);
    type Sort_Set is array (Index range <>) of Element;

    with function "<" (Left : Element; Right : Element) return Boolean is <>;
procedure PragmARC.Sort_Heap (Set : in out Sort_Set);

and use Index'Pred and Index'Succ.

-- 
Jeff Carter
"Ah, go away or I'll kill ya."
Never Give a Sucker an Even Break
100