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From: Ted Dennison <dennison@telepath.com>
Subject: Re: 'Read for pointers
Date: 2000/07/27
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In article <lZIf5.190$wE4.35361@nnrp3.sbc.net>,
  "Pat Rogers" <progers@NOclasswideSPAM.com> wrote:

> "Ted Dennison" <dennison@telepath.com> wrote in message
> news:8lndgv$1om$1@nnrp1.deja.com...
> > The problem is that Item is an *out* parameter. That means I won't
> > have acces to the pointer's old value inside Read. There's no way I

> Further to my previous post, to the effect that one can indeed read
> mode out parameters: the access value of the actual is copied into the
> formal, so you get a meaningful value coming in even though the mode
> is out. See RM 6.4.1{12,13}

Wow. That's one I would not have guessed. So there's effectively no
difference between "out" and "in out" for access types, composite types
with discriminants, or record types with default field values? %-}

--
T.E.D.

http://www.telepath.com/~dennison/Ted/TED.html


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