From: rogoff@sccm.Stanford.EDU (Brian Rogoff)
Subject: Re: Q: access to subprogram
Date: 1996/07/08
Date: 1996-07-08T00:00:00+00:00 [thread overview]
Message-ID: <ROGOFF.96Jul8155205@sccm.Stanford.EDU> (raw)
In-Reply-To: Dtxu2p.97F@world.std.com
ncohen@watson.ibm.com (Norman H. Cohen) writes:
(By the way, I share Bob Duff's amazement at the noninclusion of downward
closures--we called them downward at the time--in Ada 95, and I say this
as one of those Bob described as urging the removal rather than the
addition of proposed Ada-95 features. I viewed the inclusion of downward
closures as the REMOVAL of an arbitrary restriction. The decision was
not made in ignorance. Bill Taylor had made what I considered an
irrefutable case for downward closures, showing how much easier it would
be to write iterators if downward closures were allowed. It came down to
a conflict between the interests of Ada programmers and the interests of
a minority of Ada implementors, and in this case the interests of the few
implementors using displays prevailed.)
Could you summarize or provide a reference to Bill Taylor's work? Does it
answer the objection that downward closures impose an inefficiency on programs
that don't use them?
I like closures myself, but I am thinking of the full (upward I guess you'd
call them) closures of Lisp, which require garbage collection. Perhaps a
"syntactically upwards compatible" Ada dialect supporting closures should be
considered, especially since the Java virtual machine already imposes GC on
any language that runs on it, and it will be a popular target.
-- Brian
next prev parent reply other threads:[~1996-07-08 0:00 UTC|newest]
Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-07-02 0:00 Q: access to subprogram tmoran
1996-07-02 0:00 ` Robert A Duff
1996-07-02 0:00 ` Robert Dewar
1996-07-03 0:00 ` Jon S Anthony
1996-07-03 0:00 ` Mark A Biggar
1996-07-03 0:00 ` Robert Dewar
1996-07-06 0:00 ` Robert A Duff
1996-07-08 0:00 ` Norman H. Cohen
1996-07-08 0:00 ` Robert Dewar
1996-07-11 0:00 ` Robert A Duff
1996-07-12 0:00 ` Robert A Duff
1996-07-14 0:00 ` Norman H. Cohen
1996-07-03 0:00 ` Robert A Duff
1996-07-03 0:00 ` Robert Dewar
1996-07-09 0:00 ` Thomas Wolff
1996-07-09 0:00 ` Robert Dewar
1996-07-10 0:00 ` Robert A Duff
1996-07-10 0:00 ` Richard A. O'Keefe
1996-07-10 0:00 ` Robert A Duff
1996-07-10 0:00 ` Thomas Wolff
1996-07-10 0:00 ` Robert A Duff
1996-07-10 0:00 ` Robert Dewar
1996-07-10 0:00 ` Robert Dewar
1996-07-03 0:00 ` Robert Dewar
1996-07-03 0:00 ` Robert A Duff
1996-07-08 0:00 ` Norman H. Cohen
1996-07-09 0:00 ` Robert A Duff
1996-07-19 0:00 ` Brian Rogoff
1996-07-22 0:00 ` Richard A. O'Keefe
1996-07-23 0:00 ` Brian Rogoff
1996-07-23 0:00 ` Robert A Duff
1996-07-26 0:00 ` Brian Rogoff
1996-07-28 0:00 ` Robert A Duff
1996-07-22 0:00 ` Brian Rogoff
1996-07-23 0:00 ` Robert A Duff
1996-07-24 0:00 ` Brian Rogoff
1996-07-26 0:00 ` Robert A Duff
1996-07-30 0:00 ` Brian Rogoff
1996-07-24 0:00 ` Richard A. O'Keefe
1996-07-26 0:00 ` Ken Garlington
1996-07-30 0:00 ` Richard A. O'Keefe
1996-07-24 0:00 ` Brian Rogoff
1996-07-26 0:00 ` Richard A. O'Keefe
1996-07-28 0:00 ` Robert A Duff
1996-07-29 0:00 ` Richard A. O'Keefe
1996-07-29 0:00 ` Robert A Duff
1996-07-28 0:00 ` Fergus Henderson
1996-07-29 0:00 ` Richard A. O'Keefe
1996-07-30 0:00 ` Jon S Anthony
1996-07-03 0:00 ` Fergus Henderson
1996-07-03 0:00 ` Robert A Duff
1996-07-03 0:00 ` Adam Beneschan
1996-07-03 0:00 ` Robert A Duff
1996-07-03 0:00 ` Robert Dewar
1996-07-09 0:00 ` Thomas Wolff
1996-07-03 0:00 ` Robert Dewar
1996-07-05 0:00 ` Jon S Anthony
1996-07-06 0:00 ` Robert A Duff
1996-07-06 0:00 ` Robert Dewar
1996-07-08 0:00 ` Robert A Duff
1996-07-08 0:00 ` Richard A. O'Keefe
1996-07-08 0:00 ` Robert A Duff
1996-07-08 0:00 ` Robert Dewar
1996-07-08 0:00 ` Robert Dewar
1996-07-10 0:00 ` Richard A. O'Keefe
1996-07-10 0:00 ` Robert Dewar
1996-07-19 0:00 ` Richard A. O'Keefe
1996-07-06 0:00 ` Robert Dewar
1996-07-07 0:00 ` Ronald Cole
1996-07-07 0:00 ` Robert Dewar
1996-07-07 0:00 ` Richard Kenner
1996-07-07 0:00 ` Robert Dewar
1996-07-14 0:00 ` Ronald Cole
1996-07-14 0:00 ` Richard Kenner
1996-07-15 0:00 ` Fergus Henderson
1996-07-15 0:00 ` Robert Dewar
1996-07-17 0:00 ` Fergus Henderson
1996-07-17 0:00 ` Richard Kenner
1996-07-17 0:00 ` Adam Beneschan
1996-07-20 0:00 ` Michael Feldman
1996-07-20 0:00 ` Robert Dewar
1996-07-16 0:00 ` Richard Kenner
1996-07-07 0:00 ` Richard Kenner
1996-07-07 0:00 ` Mark Eichin
1996-07-08 0:00 ` Richard Kenner
1996-07-08 0:00 ` Brian Rogoff [this message]
1996-07-11 0:00 ` Norman H. Cohen
1996-07-11 0:00 ` Magnus Kempe
1996-07-11 0:00 ` Robert Dewar
1996-07-09 0:00 ` Jon S Anthony
1996-07-09 0:00 ` Robert Dewar
1996-07-09 0:00 ` Jon S Anthony
1996-07-09 0:00 ` Robert Dewar
1996-07-09 0:00 ` Robert Dewar
1996-07-10 0:00 ` Ronald Cole
1996-07-11 0:00 ` Richard Kenner
1996-07-11 0:00 ` Robert Dewar
1996-07-11 0:00 ` Jon S Anthony
1996-07-11 0:00 ` Jon S Anthony
1996-07-11 0:00 ` Robert Dewar
1996-07-11 0:00 ` Jon S Anthony
1996-07-11 0:00 ` Tucker Taft
1996-07-17 0:00 ` Brian Rogoff
1996-07-11 0:00 ` Robert Dewar
1996-07-15 0:00 ` Mark A Biggar
1996-07-15 0:00 ` Robert Dewar
1996-07-12 0:00 ` Jon S Anthony
1996-07-12 0:00 ` Robert Dewar
1996-07-15 0:00 ` Jon S Anthony
1996-07-15 0:00 ` Robert Dewar
1996-07-12 0:00 ` Brian Rogoff
1996-07-16 0:00 ` Magnus Kempe
1996-07-14 0:00 ` Ronald Cole
1996-07-14 0:00 ` Robert Dewar
1996-07-15 0:00 ` Jon S Anthony
1996-07-15 0:00 ` Robert Dewar
1996-07-16 0:00 ` Brian Rogoff
1996-07-24 0:00 ` Jon S Anthony
1996-07-25 0:00 ` Fergus Henderson
1996-07-25 0:00 ` David Kristola
1996-07-26 0:00 ` Robert A Duff
1996-07-30 0:00 ` Thomas Wolff
1996-07-30 0:00 ` Robert A Duff
1996-07-30 0:00 ` David Kristola
1996-07-26 0:00 ` Robert A Duff
1996-07-26 0:00 ` Fergus Henderson
1996-07-28 0:00 ` Robert A Duff
1996-07-28 0:00 ` Fergus Henderson
1996-07-25 0:00 ` Jon S Anthony
-- strict thread matches above, loose matches on Subject: below --
1996-07-05 0:00 tmoran
1996-07-06 0:00 ` Robert A Duff
1996-07-15 0:00 tmoran
1996-07-15 0:00 ` Robert Dewar
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