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From: Steve Youngs <steve@sxemacs.org>
To: emacs-devel@gnu.org
Subject: Re: [PATCH] New convenience macros
Date: Thu, 23 Aug 2007 20:54:10 +1000	[thread overview]
Message-ID: <microsoft-free.874piq4j3h.fsf@youngs.au.com> (raw)
In-Reply-To: E1INC1e-0000oV-1r@fencepost.gnu.org


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* Richard Stallman <rms@gnu.org> writes:

  > However, Stefan wrote:

  >     The advantage over a macro is that the elisp code will work regardless of
  >     whether this optimization is implemented (it only affects byte-compiler
  >     warnings anyway), so it's trivially backward&forward compatible.

  > This is a good argument for _using_ featurep rather than the macros.

  > That doesn't mean we can't also install the macros.  But maybe you
  > will agree it is better to use featurep.

Yes, I agree.  I'm even going to add a similar optimisation to SXEmacs
and XEmacs.  However, there are situations where this optimisation won't
work, here's an example...

  (if (and (featurep 'simple) (featurep 'xemacs)) a b)

warns about free variables for both `a' and `b'.  So I think having the
macros as well as the optimisation is a good idea.  Can you please add
them, Richard? (with the updated names of course)

Thanks very much.

-- 
|---<Steve Youngs>---------------<GnuPG KeyID: A94B3003>---|
|       SXEmacs - The only _______ you'll ever need.       |
|         Fill in the blank, yes, it's THAT good!          |
|------------------------------------<steve@sxemacs.org>---|

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  reply	other threads:[~2007-08-23 10:54 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-18 14:30 [PATCH] New convenience macros Steve Youngs
2007-08-19 15:52 ` Richard Stallman
2007-08-20  2:06   ` Steve Youngs
2007-08-20 10:58     ` Kim F. Storm
2007-08-20 18:30     ` Richard Stallman
2007-08-23 10:54       ` Steve Youngs [this message]
2007-08-23 14:12         ` Johan Bockgård
2007-08-23 14:47         ` Stefan Monnier
2007-08-23 18:24           ` Steve Youngs
2007-08-23 19:12             ` Stefan Monnier
2007-08-26 14:52               ` Steve Youngs
2007-08-26 22:47                 ` Richard Stallman
2007-08-27  3:20                   ` Steve Youngs
2007-08-20  4:09 ` Stefan Monnier
2007-08-23 11:13   ` Steve Youngs
2007-08-23 15:11     ` Stefan Monnier
2007-08-23 18:24       ` Steve Youngs

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