From: Andreas Politz <politza@fh-trier.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Redefining functions and variables
Date: Wed, 28 Jul 2010 20:48:40 +0200 [thread overview]
Message-ID: <87tynjl9x3.fsf@fh-trier.de> (raw)
In-Reply-To: 61db17c1-8c30-44a1-b96e-9eec802156fe@j8g2000yqd.googlegroups.com
Elena <egarrulo@gmail.com> writes:
> On Jul 28, 7:51 am, Elena <egarr...@gmail.com> wrote:
>> > Of course this leads to an endless recursive loop, expanding your macro
>> > again and again ...
>>
>> Then I should have tested the macro with `macroexpand-all' instead of
>> `macroexpand'. However, I've tried using the macro, and it seemed to
>> work, albeit it choked on the unquoted symbol passed to `fboundp'.
>
> I think it seemed to work because the macro was interpreted, therefore
> it was expanded only once before the failure.
Don't know, but defining `defun' as a macro usually deletes the original
subst (which is a special form, which is kind of like a macro).
(defvar defun-subst (symbol-function 'defun))
(defmacro defun (name args &rest body)
`(defun ,name ,args ,@body))
(defun foo ())
;; Enters the debugger because of recursion limit reached.
;; Restore original defun
(fset 'defun defun-subst)
-ap
next prev parent reply other threads:[~2010-07-28 18:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-27 15:12 Redefining functions and variables Elena
2010-07-27 20:21 ` Stefan Monnier
2010-07-27 22:16 ` Elena
2010-07-28 0:35 ` Andreas Politz
2010-07-28 7:51 ` Elena
2010-07-28 14:29 ` Elena
2010-07-28 18:48 ` Andreas Politz [this message]
2010-07-28 20:37 ` Pascal J. Bourguignon
2010-07-29 8:32 ` Elena
2010-07-29 9:57 ` Stefan Monnier
2010-07-29 10:16 ` Elena
2010-07-29 13:14 ` Stefan Monnier
2010-07-30 19:32 ` Uday S Reddy
2010-07-29 10:31 ` Andreas Politz
2010-07-29 11:46 ` Johan Bockgård
2010-07-29 15:54 ` Andreas Politz
2010-07-29 12:41 ` Tim X
2010-07-29 10:03 ` Pascal J. Bourguignon
2010-07-29 10:28 ` Elena
2010-07-29 20:35 ` Johan Bockgård
2010-07-29 22:22 ` Tim X
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