From: ludo@gnu.org (Ludovic Courtès)
To: guile-devel@gnu.org
Subject: Re: truth of %nil
Date: Mon, 31 Aug 2009 23:59:44 +0200 [thread overview]
Message-ID: <87my5fpru7.fsf@gnu.org> (raw)
In-Reply-To: DB2B9911-8F28-47C7-B261-FF6E540462EB@raeburn.org
Hi,
Ken Raeburn <raeburn@raeburn.org> writes:
> I kind of assumed that making all-bits-zero an invalid value was a
> conscious choice by the Guile (or SCM?) designers which wasn't likely
> to be revisited. It is, after all, a fairly easy way of highlighting
> a certain class of uninitialized-value problems -- choosing strict
> checking and debugging over letting the programmer be lazy.
Indeed, that could have been one reason. We could ask Aubrey Jaffer
about this.
> I think I'm mildly in favor of keeping all-bits-zero as an invalid
> representation. But, if it's a huge win for BDW-GC, maybe it's worth
> it.
As discussed in my other message, it would actually be harmful.
Thanks,
Ludo'.
next prev parent reply other threads:[~2009-08-31 21:59 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-29 21:12 truth of %nil Andy Wingo
2009-06-29 21:44 ` Neil Jerram
2009-06-29 22:11 ` Andy Wingo
2009-06-30 22:22 ` Neil Jerram
2009-07-01 6:45 ` Daniel Kraft
2009-07-01 21:54 ` Neil Jerram
2009-07-05 13:07 ` Mark H Weaver
2009-08-30 11:07 ` Neil Jerram
2009-08-30 14:11 ` Mark H Weaver
2009-09-01 22:00 ` Neil Jerram
2009-09-02 15:57 ` Mark H Weaver
2009-09-17 21:21 ` Neil Jerram
2009-07-02 14:28 ` Mark H Weaver
2009-07-02 14:50 ` Ludovic Courtès
2009-07-02 22:50 ` Neil Jerram
2009-07-03 15:32 ` Mark H Weaver
2009-07-05 2:41 ` Mark H Weaver
2009-07-05 9:19 ` Andy Wingo
2009-07-07 11:14 ` Mark H Weaver
2009-07-08 13:17 ` Mark H. Weaver
2009-08-30 11:20 ` Neil Jerram
2009-08-30 11:13 ` Neil Jerram
2009-08-30 14:15 ` Mark H Weaver
2009-09-01 21:50 ` Neil Jerram
2009-08-30 22:01 ` Ken Raeburn
2009-08-31 21:59 ` Ludovic Courtès [this message]
2009-08-31 23:39 ` Ken Raeburn
2009-08-31 21:55 ` SCM_BOOL_F == 0 and BDW-GC Ludovic Courtès
2009-09-17 22:00 ` Neil Jerram
2009-09-17 22:28 ` Ludovic Courtès
2009-09-18 20:51 ` Neil Jerram
2009-09-20 17:21 ` Ludovic Courtès
2009-09-20 21:03 ` Neil Jerram
2009-09-20 21:36 ` Ludovic Courtès
2009-07-06 21:46 ` truth of %nil Neil Jerram
2009-07-06 23:54 ` Mark H Weaver
2009-07-08 8:08 ` Ludovic Courtès
2009-07-23 21:12 ` Andy Wingo
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