GNU bug report logs - #17485
(srfi srfi-1) reduce-right does not scale, version 2.0.9

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Package: guile;

Reported by: David Kastrup <dak <at> gnu.org>

Date: Tue, 13 May 2014 10:49:01 UTC

Severity: normal

Done: Andy Wingo <wingo <at> pobox.com>

Bug is archived. No further changes may be made.

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From: Mark H Weaver <mhw <at> netris.org>
To: David Kastrup <dak <at> gnu.org>
Cc: 17485 <at> debbugs.gnu.org
Subject: bug#17485: [PATCH 2/3] Rewrite take-right, drop-right, drop-right!
Date: Tue, 03 Jun 2014 23:45:54 -0400

David Kastrup <dak <at> gnu.org> writes:

> * module/srfi/srfi-1.scm (take-right, drop-right, drop-right!): The
>   definitions tended to be overly complicate and/or rely on pushing
>   material on the VM stack, detrimental to scalability for Guile 2.0 and
>   also worse for performance.
>
>   The changed definitions lead to different, more accurate exceptions
>   being raised.  They rely on length+ returning the length of dotted
>   lists, behavior that is not specified by the SRFI-1 definition but
>   available in GUILE.

I forgot to mention that, again, the commit log should not contain
rationales, but merely summarize the changes made.

     Thanks,
       Mark
This bug report was last modified 9 years and 4 days ago.

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