From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#62746: [PATCH] Updated Elispref-Manual: `nil' cannot be defuned Date: Fri, 05 May 2023 10:01:24 -0400 Message-ID: References: <83y1n0azp3.fsf@gnu.org> <834jorjnas.fsf@gnu.org> Reply-To: Stefan Monnier Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="25215"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: 62746-done@debbugs.gnu.org, one.last.kiss@outlook.com To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri May 05 16:02:20 2023 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1puw0q-0006J7-QY for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 05 May 2023 14:02:02 +0000 Original-Received: (at 62746-done) by debbugs.gnu.org; 5 May 2023 14:01:42 +0000 Original-Received: from localhost ([127.0.0.1]:57157 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1puw0E-0007YI-Hy for submit@debbugs.gnu.org; Fri, 05 May 2023 10:01:42 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:41645) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1puw0C-0007Y4-Gu for 62746-done@debbugs.gnu.org; Fri, 05 May 2023 10:01:40 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 4CA4380F1D; Fri, 5 May 2023 10:01:35 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id C598880ADE; Fri, 5 May 2023 10:01:33 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1683295293; bh=aOjIBTL2yseeGD77zxY5VRJz2e57FJHq65O9Pi6sZ5U=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=myrFW7MeltERtV8RroAjOcb/Quonf5RUTvdH5duIXo2USnKYn7eGSZqTsZObLliBW cpXClbiJ6aP/zu3MAJwFNP9MGDReW9g1f685mlNkM11i4g3wJkfPdimNCZRPq78xrE an65/fzE+hrV1PNrcUO1s3RqrscpStRWH4Iw8uLI+R5ffcmh38OGuKI2G2i41DVhuR cZoE4/g5vIjRW/JAz75x88Qr9uAqVfwpGvxN8j/UB1O7oS8T1neh3TXpd7xQWG9z7Z ajUDoSdtKQUNE6QBORvs2fFIM117QRIfe4mNiVzEWrnGx8NmBHSRQmUBBeY+KH9hyh fO+YIwqDKUxjg== Original-Received: from pastel (unknown [45.72.217.176]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id E494312008F; Fri, 5 May 2023 10:01:32 -0400 (EDT) In-Reply-To: <834jorjnas.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 05 May 2023 09:38:03 +0300") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:261105 Archived-At: >> >> =E2=80=9CThe symbols nil and void are Lisp objects, and can be stored= into a >> >> function cell just as any other object can be (and they can be valid >> >> functions if you define them in turn with defun).=E2=80=9D >> >>=20 >> >> Updated: >> >>=20 >> >> =E2=80=9CThe symbols nil and void are Lisp objects, and can be stored= into a >> >> function cell just as any other object can be (and void can be a >> >> valid function if you define it with defun).=E2=80=9D >> > >> > Why do you think the original text needs to be corrected? >>=20 >> Indeed, `nil` is treated specially to mean "not defined" when we try to >> call a function: >>=20 >> Lisp_Object >> funcall_general (Lisp_Object fun, ptrdiff_t numargs, Lisp_Object *ar= gs) >> { >> Lisp_Object original_fun =3D fun; >> retry: >> if (SYMBOLP (fun) && !NILP (fun) >> && (fun =3D XSYMBOL (fun)->u.s.function, SYMBOLP (fun))) >> fun =3D indirect_function (fun); >>=20=20=20=20=20 >> if (SUBRP (fun) && !SUBR_NATIVE_COMPILED_DYNP (fun)) >> return funcall_subr (XSUBR (fun), numargs, args); >> else if (COMPILEDP (fun) >> || SUBR_NATIVE_COMPILED_DYNP (fun) >> || MODULE_FUNCTIONP (fun)) >> return funcall_lambda (fun, numargs, args); >> else >> { >> if (NILP (fun)) >> xsignal1 (Qvoid_function, original_fun); >>=20 > > Thanks. So I think our documentation is correct in this aspect, and > I'm therefore closing this bug. The current text suggest that `nil` "can be valid [a] function if you define [it] in turn with defun", which is not really true. Stefan