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From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: `max-specpdl-size' and `max-lisp-eval-depth'
Date: Tue, 28 Sep 2021 13:05:15 +0200	[thread overview]
Message-ID: <87fstpkljo.fsf@zoho.eu> (raw)
In-Reply-To: 87k0j1t1mv.fsf@gmx.net

Stephen Berman wrote:

>> 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"

Cool B)

IIRC from Automata Theory there was this thing called a PDA or
"pushdown automaton", maybe that was a stack as well?

Later a PDA was a "Personal digital assistant" like the Apple
Newton which didn't make anyone impressed. But I guess they
made up for it at least commercially with all the later
iThings ...

-- 
underground experts united
https://dataswamp.org/~incal




  parent reply	other threads:[~2021-09-28 11:05 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-26  1:48 `max-specpdl-size' and `max-lisp-eval-depth' Hongyi Zhao
2021-09-26  2:36 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-26  6:33   ` Hongyi Zhao
2021-09-26  7:13     ` tomas
2021-09-26 11:26       ` Hongyi Zhao
2021-09-26 11:55         ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-26 13:04         ` Eli Zaretskii
2021-09-26 15:01           ` Hongyi Zhao
2021-09-28 10:50             ` Stephen Berman
2021-09-28 11:03               ` Hongyi Zhao
2021-09-28 11:05               ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-09-28 11:20                 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-28 13:49                 ` tomas
2021-09-28 14:08                   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-28 14:19                     ` tomas
2021-09-28 11:14               ` Lars Ingebrigtsen
2021-09-28 11:23                 ` Stephen Berman
2021-09-29  5:53                   ` Lars Ingebrigtsen
2021-09-26  3:53 ` [External] : " Drew Adams
2021-09-26  4:09   ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-28  3:45     ` Google vi (was: Re: [External] : `max-specpdl-size' and `max-lisp-eval-depth') Emanuel Berg via Users list for the GNU Emacs text editor
2021-09-26  7:09   ` [External] : `max-specpdl-size' and `max-lisp-eval-depth' Hongyi Zhao

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