From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stephen Berman Newsgroups: gmane.emacs.help Subject: Re: `max-specpdl-size' and `max-lisp-eval-depth' Date: Tue, 28 Sep 2021 12:50:32 +0200 Message-ID: <87k0j1t1mv.fsf@gmx.net> References: <87ilyoukp2.fsf@zoho.eu> <20210926071351.GA10016@tuxteam.de> <83czovo5dh.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="26685"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: help-gnu-emacs To: Hongyi Zhao Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Sep 28 12:52:33 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 1mVAiu-0006ib-NZ for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 28 Sep 2021 12:52:32 +0200 Original-Received: from localhost ([::1]:58098 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVAit-0007Jb-JF for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 28 Sep 2021 06:52:31 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34966) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVAh6-0005zk-Fr for help-gnu-emacs@gnu.org; Tue, 28 Sep 2021 06:50:41 -0400 Original-Received: from mout.gmx.net ([212.227.17.20]:48197) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVAh3-0001Wv-Lz; Tue, 28 Sep 2021 06:50:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1632826234; bh=XX2zdk4dHPMR0/M42i+XPqHq89b9t5hfAuEnxmoEov0=; h=X-UI-Sender-Class:From:To:Cc:Subject:References:Date:In-Reply-To; b=jNynZPe6O0UScdEeOIEleFBVEALx7CcBnEpVDE0ZSQSJJOknQ5krBCq/7ASSHVKVe JSrs6I5lVijsEjfSE4PsjYW9q/y+vgUJWQqcoBuLWiWI+sU6D7vFbzA6swvf9Cqu7/ XzZiyKCMI2G4dlZup/YOyQOb/t7Y5XorGobz1Pj8= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Original-Received: from strobelfs ([188.109.165.14]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1Md6Mt-1n3xDG3PPf-00aHM8; Tue, 28 Sep 2021 12:50:33 +0200 In-Reply-To: (Hongyi Zhao's message of "Sun, 26 Sep 2021 23:01:17 +0800") X-Provags-ID: V03:K1:wCwrvtKTgdGzmDw+/kEVSDiqJZSmkb2fIkbuDFitDf5o1rYnYzQ XDR1Hq8ahe0/yRd1o1pxK+0gdLUxXjGR4Vv6WHmXTdstIRxk5W/MGYg5KbMwNGqzwFDsNpf dUPYnhUr126UJrK0hLUTxuWZtwWWRSbbUjM3EOO27fqSMu+1e5ItVjapzHJT6mJlg/MMDgM 0nvF7yCVb2/ty0KUK6Eyw== X-UI-Out-Filterresults: notjunk:1;V03:K0:Aud0gWplsB4=:KX3NR/1j3Aeo7n9IkqRviU 90dNwO7eaa/8nT8Y41iNePFsYKniMcrQ5GaUXW/hDPT3Qzh+mVxsfbDUMT5KX263/OGHLd6jd PhHuHK2bl+Pbj+xX+v1T9T4VBV/M5kqtWp4YTflVhD7KzNII6KLFdjuICq183e7XOWhuZfrFQ 40wQUDoOV3oWBM8ZzQvQbha/3XQxQZVkydwjMLZVP/wmSdH8g2Bm6OJfjjZYTEoT55AKnaKMs mLvtipEd1iwSDipWujVMiwqh33hfY/EilJx+JCUT21PTxWJ5bRQNKUffY+p2Ncve6KGrk3+vP VhozWgE71wt/6+N8YiU2sBiDlmpADWWNPt9Bru73CA53V5TWZgNaQisDWsahZzQwoEmqtMEnn 9Jm8cj9c7zXZKzFKjvsJxySliJ0CaHznOvGOVqZsUJ0Ns3X3DsM78Xi4wF8ixYoE+Vgq5csle Sy9FcfyMO4TPKI0jS2zdPL1PqymxIVuJJ6dmAOMlj4m2XSJAuO/Z0dHgE7djnXeG1A2fXsrif MxBiIA4YXNYR2nOhxUVIbPgLg4fSxeJhRVUWCnUzuoGtaEUKZteOFNXk9gRFTmR/zgVamJXf3 rbp3LemQwwrTca+5SwKfmf2CzUpfSN1iJSUDjAap4X/dauLkFlc3ujftsZun2349Kt50/z06q PQjkfUA8qECeuVWy0KD0SFgFOZdg58+2iIFnFGYqI2sa69IZ9OY9n3xWQMSzvQQDooEVSAvMU QN4o+Hz3YIdWysmJV9JZFZLlxNiWPNAh9RCVvH/LF7lvLRH/1Xg+LgGYVKzNSm1JYGJm3UOO Received-SPF: pass client-ip=212.227.17.20; envelope-from=stephen.berman@gmx.net; helo=mout.gmx.net 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, FREEMAIL_FROM=0.001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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:133337 Archived-At: On Sun, 26 Sep 2021 23:01:17 +0800 Hongyi Zhao wrote: > On Sun, Sep 26, 2021 at 9:04 PM Eli Zaretskii wrote: >> >> > From: Hongyi Zhao >> > Date: Sun, 26 Sep 2021 19:26:22 +0800 >> > Cc: help-gnu-emacs >> > >> > what puzzles me most is what is the full English name of the word >> > `specpdl'. >> >> As I recently learned, PDL = push-down list. > > Thank you for your explanation. Only two built-in symbols in Emacs > contain this string in their names - the other is > `ar-max-specpdl-size'. The term goes back to the beginnings of Lisp (McCarthy's paper from 1960, available via the Wayback Machine from http://www-formal.stanford.edu/jmc/recursive/node4.html): In general (we shall discuss an exception), the routine for a recursive function uses itself as a subroutine [...] This possible conflict is resolved by the SAVE and UNSAVE routines that use the public push-down list. A footnote here (added later) says: "1995: now called a stack" Steve Berman