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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: System.Address_to_Access_Conversions
Date: 1998/07/26
Message-ID: <dewar.901493098@merv>#1/1
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Charles said

<<Ok.  But they are just saying how THEY did it.  This doesn't imply that
everyone else did the same thing.  Or even that they will continue to do
things that way (although, public documentation is a kind of a
committment).
>>


That was not public documentation, it was simply a technical paper 
describing our thoughts at the time on how to implement one particular
feature in Ada 95. Not the slightest commitment was implied by this
paper.

The current documentatoin of GNAT does not guarantee the layout of
tagged types, and it is quite wrong to write code that depends on this
layout, even if you intend to use only GNAT.