From: Stefan Monnier <monnier@iro.umontreal.ca>
To: David Kastrup <dak@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Lexical binding
Date: Mon, 04 Apr 2011 18:34:00 -0400 [thread overview]
Message-ID: <jwv4o6dzm6x.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <877hb91xoi.fsf@fencepost.gnu.org> (David Kastrup's message of "Tue, 05 Apr 2011 00:03:41 +0200")
> Go through a stage
> (condition-case :fun-body (lambda () ignore)
> (multi-lambda (x) (quit (x test) test) (error (x test) test)))
Yes, that's my current "best plan" indeed, except it'd be
(split-binding (test)
(condition-case :fun-body (lambda () <foo>)
(quit (lambda (test) test)
(error (lambda (test) test)))
so it affects as little as possible the rest of the code. But the above
can interfere with other uses of `test' in <foo> so it needs to be more
precise, maybe something like:
(split-binding (test #:x)
(condition-case :fun-body (lambda () <foo>)
(quit (lambda (#:x) test)
(error (lambda (#:x) test)))
but it's more difficult to make this work with the interpreter.
> or something similar where the byte compiler does the "unused variable"
> check (or a setup for it) during the multi-lambda expansion stage. What
> kind of form is exactly needed here in order to cater for all such
> situations will require careful thinking.
Yes, that's currently my "best plan", but since it would also be useful
for macros like dolist/loop/pcase, it shouldn't be too hackish and work
well for the interpreted case as well.
Stefan
next prev parent reply other threads:[~2011-04-04 22:34 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-01 17:32 Lexical binding Stefan Monnier
2011-04-01 19:12 ` David De La Harpe Golden
2011-04-01 19:46 ` Eli Zaretskii
2011-04-04 16:05 ` Stefan Monnier
2011-04-01 20:04 ` Daniel Colascione
2011-04-01 20:39 ` cedet-bzr build failure (was : Lexical binding) Darren Hoo
2011-04-01 21:21 ` David Engster
2011-04-01 22:26 ` Darren Hoo
2011-04-02 12:40 ` David Engster
2011-04-02 13:42 ` Eric M. Ludlam
2011-04-02 18:22 ` cedet-bzr build failure David Engster
2011-04-02 18:29 ` cedet-bzr build failure (was : Lexical binding) Darren Hoo
2011-04-01 20:42 ` Lexical binding Eli Zaretskii
2011-04-01 22:13 ` Juanma Barranquero
2011-04-02 2:33 ` Juanma Barranquero
2011-04-02 3:36 ` Juanma Barranquero
2011-04-02 18:38 ` Stefan Monnier
2011-04-04 16:04 ` Juanma Barranquero
2011-04-04 21:44 ` Stefan Monnier
2011-04-04 21:56 ` Juanma Barranquero
2011-04-04 22:03 ` David Kastrup
2011-04-04 22:34 ` Stefan Monnier [this message]
2011-04-02 18:38 ` Stefan Monnier
2011-04-02 18:50 ` Juanma Barranquero
2011-04-02 18:57 ` Juanma Barranquero
2011-04-03 12:05 ` Christian Ohler
2011-04-03 12:26 ` Juanma Barranquero
2011-04-03 23:32 ` Christian Ohler
2011-04-04 0:12 ` Juanma Barranquero
2011-04-04 16:22 ` Stefan Monnier
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