From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Newsgroups: gmane.emacs.help Subject: Re: `max-specpdl-size' and `max-lisp-eval-depth' Date: Tue, 28 Sep 2021 16:19:22 +0200 Message-ID: <20210928141922.GD32378@tuxteam.de> References: <87ilyoukp2.fsf@zoho.eu> <20210926071351.GA10016@tuxteam.de> <83czovo5dh.fsf@gnu.org> <87k0j1t1mv.fsf@gmx.net> <87fstpkljo.fsf@zoho.eu> <20210928134949.GA32378@tuxteam.de> <87o88ckd2f.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="yudcn1FV7Hsu/q59" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="25833"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/1.5.21 (2010-09-15) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Sep 28 16:21:55 2021 Return-path: Envelope-to: geh-help-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 1mVDzX-0006Wk-00 for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 28 Sep 2021 16:21:55 +0200 Original-Received: from localhost ([::1]:55250 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVDzV-0001Lg-Uu for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 28 Sep 2021 10:21:53 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58796) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVDx7-0000JW-Uy for help-gnu-emacs@gnu.org; Tue, 28 Sep 2021 10:19:26 -0400 Original-Received: from mail.tuxteam.de ([5.199.139.25]:56587) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_128_CBC_SHA1:128) (Exim 4.90_1) (envelope-from ) id 1mVDx6-0000sg-6p for help-gnu-emacs@gnu.org; Tue, 28 Sep 2021 10:19:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tuxteam.de; s=mail; h=From:In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:To:Date; bh=IQBBADkouYXoEQVKB6AazurPzSH4ERyITfrmcrWKKUs=; b=kurnhTE49oS7BMggiUlaWF6f1VLpDjqnKfKR6RAe1P15PoItoGZQCnBwoR4lyH7aELuWfUzBnVg5BLvJpJsNOrWmL9n5GGcT6SMyAaDKINSzXX799aFt80oukAn/QigGxEiSZh7O7/SywKf+lAoPEC1A/pwhd7KdCSWA0uFBvGXp9ylBRTs2xh/fkLNN/ZhPuFGMLyrgH+EPxOp7tH7ixlhdV07spqLaijz7BZQvs2IRUCh+eaI19tXUo8RHK6b6zQ+uaS00ZbBbpQgXcuCiUuLVzR1Rn950T9WuZjNDIx0CKnh5wbeRqq3Kk0j4hKCTUuC1PdZ8bSVjh4363PotUg==; Original-Received: from tomas by mail.tuxteam.de with local (Exim 4.80) (envelope-from ) id 1mVDx4-0000My-69 for help-gnu-emacs@gnu.org; Tue, 28 Sep 2021 16:19:22 +0200 Content-Disposition: inline In-Reply-To: <87o88ckd2f.fsf@zoho.eu> Received-SPF: pass client-ip=5.199.139.25; envelope-from=tomas@tuxteam.de; helo=mail.tuxteam.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:133354 Archived-At: --yudcn1FV7Hsu/q59 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Sep 28, 2021 at 04:08:24PM +0200, Emanuel Berg via Users list for t= he GNU Emacs text editor wrote: > tomas wrote: >=20 > >> IIRC from Automata Theory there was this thing called a PDA > >> or "pushdown automaton", maybe that was a stack as well? > > > > That was a stack. A PDA automaton is a finite automaton > > enhanced by a stack, so it can grok nested structures. >=20 > OK! >=20 > But actually the way you put it it's infinite :) Finite automata are only in part finite (the set of states is finite, not necessarily the input/output). The addition of a stack is, of course, yet another infinite accessory (if the stack were finite, you could simulate it by adding -- possibly lots and lots, but still finitely many states). Strange stuff all over :) Cheers - t --yudcn1FV7Hsu/q59 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAmFTJGoACgkQBcgs9XrR2kYmLACfXkUv6RehTOx8KvkOyJnvsD08 528AniVPDkykwE1X594GKP3ZHel+x4tg =Moye -----END PGP SIGNATURE----- --yudcn1FV7Hsu/q59--