From: Andreas Schwab <schwab@suse.de>
Cc: emacs-devel@gnu.org
Subject: Re: Strange behavior of macro
Date: Tue, 30 May 2006 12:35:08 +0200 [thread overview]
Message-ID: <jeejybg5r7.fsf@sykes.suse.de> (raw)
In-Reply-To: <BAY112-F21A0B11F095BF4E8997013DA920@phx.gbl> (Herbert Euler's message of "Tue, 30 May 2006 18:31:47 +0800")
"Herbert Euler" <herberteuler@hotmail.com> writes:
>>From: Andreas Schwab <schwab@suse.de>
>>To: "Herbert Euler" <herberteuler@hotmail.com>
>>CC: emacs-devel@gnu.org
>>Subject: Re: Strange behavior of macro
>>Date: Tue, 30 May 2006 12:23:49 +0200
>>
>>"Herbert Euler" <herberteuler@hotmail.com> writes:
>>
>> > Is the following in Emacs a expected behavior of macro?
>> >
>> > (defmacro m1 (v)
>> > (let ((len (length (eval v))))
>> > `(quote ,len)))
>> > => m1
>>[...]
>> > (m1 v)
>> > => error: (wrong-type-argument sequencep v)
>>
>>See (elisp)Eval During Expansion.
>
> OK, so it's an accepted behavior. Btw, in the test of GNU clisp,
> it's safe to write such a macro:
Emacs Lisp is using dynamic binding, not lexical binding.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
prev parent reply other threads:[~2006-05-30 10:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-30 8:56 Strange behavior of macro Herbert Euler
2006-05-30 9:34 ` David Kastrup
2006-05-30 10:23 ` Andreas Schwab
2006-05-30 10:31 ` Herbert Euler
2006-05-30 10:35 ` Andreas Schwab [this message]
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