From: Andy Wingo <wingo@pobox.com>
To: Hans Aberg <haberg-1@telia.com>
Cc: bug-guile@gnu.org
Subject: Re: GIT version: values
Date: Thu, 27 Jan 2011 10:00:48 +0100 [thread overview]
Message-ID: <m3sjwebu0v.fsf@unquote.localdomain> (raw)
In-Reply-To: <29B3FB6E-6F73-40B2-A8D0-DB16B70656BB@telia.com> (Hans Aberg's message of "Thu, 27 Jan 2011 00:34:57 +0100")
Hi Hans,
On Thu 27 Jan 2011 00:34, Hans Aberg <haberg-1@telia.com> writes:
>> If you wish to preserve a potentially
>> multiply-valued return, you will need to set up a multiple-value
>> continuation, using `call-with-values'.
>
> But this is false.
According to the standard, passing an unintended number of values to a
continuation is undefined. To portably preserve a potentially
multiply-valued return, you need call-with-values.
You can still implement other paradigms on top of this. If you want to
express some semantics that is not specified in the report, write a
macro that wraps your expressions in call-with-values. This is
effectively what we will do for Lua, for example.
Regards,
Andy
--
http://wingolog.org/
next prev parent reply other threads:[~2011-01-27 9:00 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-18 9:57 GIT version: values writing Hans Aberg
2011-01-19 14:44 ` GIT version: values Hans Åberg
2011-01-26 20:51 ` Andy Wingo
2011-01-26 23:34 ` Hans Aberg
2011-01-27 9:00 ` Andy Wingo [this message]
2011-01-27 13:20 ` Hans Aberg
2011-01-19 17:05 ` Hans Aberg
2011-01-20 15:17 ` Ludovic Courtès
2011-01-20 17:10 ` Hans Aberg
2011-01-19 19:40 ` GIT version: segmentation fault Hans Aberg
2011-01-26 20:46 ` Andy Wingo
2011-01-26 23:37 ` Hans Aberg
2011-01-19 22:22 ` GIT version: missing linking flag Hans Aberg
2011-01-20 15:20 ` Ludovic Courtès
2011-01-20 17:03 ` Hans Aberg
2011-01-20 21:01 ` Ludovic Courtès
2011-01-20 21:13 ` Hans Aberg
2011-01-21 16:02 ` Ludovic Courtès
2011-01-21 17:59 ` Hans Aberg
2011-01-26 20:52 ` Andy Wingo
2011-01-26 23:44 ` Hans Aberg
2011-01-29 21:47 ` Ludovic Courtès
2011-01-29 22:51 ` Hans Aberg
2011-01-26 20:55 ` Andy Wingo
2011-01-26 23:47 ` Hans Aberg
2011-01-20 15:16 ` GIT version: values writing Ludovic Courtès
2011-01-20 16:51 ` Hans Aberg
2011-01-20 21:18 ` Ludovic Courtès
2011-01-20 21:55 ` Hans Aberg
2011-01-21 17:13 ` Values extension Hans Aberg
2011-01-26 20:57 ` GIT version: values writing Andy Wingo
2011-01-26 23:50 ` Hans Aberg
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