From: Andy Wingo <wingo@pobox.com>
To: Mark H Weaver <mhw@netris.org>
Cc: guile-devel <guile-devel@gnu.org>
Subject: Re: [PATCH] New division operators, and optimization for fractions
Date: Mon, 14 Feb 2011 20:44:18 +0100 [thread overview]
Message-ID: <m3wrl25rl9.fsf@unquote.localdomain> (raw)
In-Reply-To: <87hbc89e6g.fsf@netris.org> (Mark H. Weaver's message of "Sun, 13 Feb 2011 09:55:51 -0500")
On Sun 13 Feb 2011 15:55, Mark H Weaver <mhw@netris.org> writes:
> I have a new version of the patch set which I believe addresses all of
> your (quite reasonable) concerns. The second patch changes the API of
> the existing multi-valued operators as you suggest. The third optimizes
> the fraction case. The fourth adds the new division operators. The
> fifth optimizes the existing truncate/round/floor/ceiling unary
> operators.
>
> The sixth patch removes a lot of code, by implementing division
> operators in terms of other division operators.
>
> The other notable patch is the last one, which is unrelated to numerics,
> but it addresses a problem I discovered while implementing a complex
> number class in GOOPS. Suppose you define the following class within a
> module:
>
> (define-class <gcomplex> ()
> (real-part #:getter real-part #:init-keyword #:real-part)
> (imag-part #:getter imag-part #:init-keyword #:imag-part))
>
> There's no way I have found to make this work correctly. If the module
> exports real-part and imag-part, then those procedures will stop working
> for normal complex numbers for those who import the module. If the
> module does not export them, then those who import the module won't be
> able to use real-part or imag-part on <gcomplex> objects. The last
> patch fixes this.
Thanks for the patches; applied. And thanks for the prompt feedback!
Cheers,
Andy
--
http://wingolog.org/
next prev parent reply other threads:[~2011-02-14 19:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <860989.4731.qm@web114104.mail.gq1.yahoo.com>
2011-02-12 20:19 ` [PATCH] New division operators, and optimization for fractions Andy Wingo
2011-02-13 14:55 ` Mark H Weaver
2011-02-14 19:44 ` Andy Wingo [this message]
[not found] <595618.30923.qm@web114107.mail.gq1.yahoo.com>
2011-02-12 21:54 ` Andy Wingo
2011-02-12 22:38 ` Mark Weaver
2011-02-10 23:42 Mark H Weaver
2011-02-12 11:55 ` Andy Wingo
2011-02-14 13:56 ` Ken Raeburn
2011-02-14 18:17 ` Mark H Weaver
2011-02-15 10:38 ` Ludovic Courtès
2011-02-15 11:43 ` Mark H Weaver
2011-02-15 14:49 ` Ludovic Courtès
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