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From: Jacob Sparre Andersen <sparre@nbi.dk>
Newsgroups: comp.lang.ada
Subject: Re: Mutating elements of constant list using a container element
 iterator
Date: Wed, 05 Aug 2015 09:43:49 +0200
Organization: Jacob Sparre Andersen Research & Innovation
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Date: 2015-08-05T09:43:49+02:00
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martinbbjerregaard@gmail.com writes:

> Mutating elements of a constant container in a "for ... of ... loop"
> is possible with the "standard" container types but not the indefinite
> or bounded containers:

The trick is to assign a new value to the whole object, and not just a
component of it:

   for Item of V2 loop
      Item := (Value => 0);
   end loop;

I'm not sure exactly why there is a difference.

> Is this a bug?

It might be.  I don't understand the indefinite containers well enough to
be able to explain what happens.

Greetings,

Jacob
-- 
"The problem with America is stupidity. I'm not saying there
 should be a capital punishment for stupidity, but why don't
 we just take the safety labels off of everything and let
 the problem solve itself?"