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From: Robert Dewar <robert_dewar@my-deja.com>
Subject: Re: Function Calls by Address
Date: 1999/09/23
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Date: 1999-09-23T00:00:00+00:00
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In article <wcc7lljb0yn.fsf@world.std.com>,
  Robert A Duff <bobduff@world.std.com> wrote:
> But I *still* don't see how it proves that with_clauses on
subunits are
> useful or good.  I'm not disputing that they are useful or
good -- I'm
> just saying I don't see how the difficulty of this imaginary
tool has
> anything to do with it.

I think you miss the point -- it is the other way round, if
there were a trivial conversion, then it would show that there
was no significant issue of expressive power. The fact that
there is no trivial conversion is *suggestive* of the fact that
there is some important issue of EP, but certainly not proof.
In fact, I strongly agree that this is a critical factor, and
I think the excercise of trying to think about the tool, as
you did in your msg, provides valuable clues as to why this
is so!


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