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From: Kevin Rodgers <ihs_4664@yahoo.com>
Subject: Re: bigger integers
Date: Tue, 07 Sep 2004 11:46:46 -0600	[thread overview]
Message-ID: <413DF406.8010608@yahoo.com> (raw)
In-Reply-To: mailman.1438.1094249173.1998.help-gnu-emacs@gnu.org

Joe Corneli wrote:
 >    After all, emacs lisp is designed to count characters in a file,
 >    not to compute factorials.
 >
 >  "Emacs is the extensible, customizable, self-documenting real-time
 >  display editor."
 >
 > If I can't extend or customize it to compute 12! then there seems to
 > be something missing.  Kevin's factorial works though so I guess
 > that's good enough for me... oh wait a second now it stopped working.
 >
 >   Debugger entered--Lisp error: (error "Lisp nesting exceeds max-lisp-eval-depth")

The obvious pseudo-fix is something like:

(setq max-lisp-eval-depth (* 42 max-lisp-eval-depth))

 >   (factorial (1- num))
 >   (* num (factorial (1- num)))
 >   (if (<= num 0) 1.0 (* num (factorial ...)))
 >   factorial(7)
 >   (* num (factorial (1- num)))
 >   (if (<= num 0) 1.0 (* num (factorial ...)))
 >   factorial(8)
 >   (* num (factorial (1- num)))
 >   (if (<= num 0) 1.0 (* num (factorial ...)))
 >   factorial(9)
 >   (* num (factorial (1- num)))
 >   (if (<= num 0) 1.0 (* num (factorial ...)))
 >   factorial(10)
 >   (* num (factorial (1- num)))
 >   (if (<= num 0) 1.0 (* num (factorial ...)))
 >   factorial(11)
 >   (* num (factorial (1- num)))
 >   (if (<= num 0) 1.0 (* num (factorial ...)))
 >   factorial(12)
 >   eval((factorial 12))
 >
 > (This same computation was fine just a minute ago, then I tried to
 > compute 100! and now it doesn't want to do 12! any more.)

That's weird, it sounds like the stack has been corrupted.

-- 
Kevin Rodgers

  parent reply	other threads:[~2004-09-07 17:46 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.1438.1094249173.1998.help-gnu-emacs@gnu.org>
2004-09-03 23:29 ` bigger integers Pascal Bourguignon
2004-09-07 17:46 ` Kevin Rodgers [this message]
     [not found] <mailman.1324.1094164438.1998.help-gnu-emacs@gnu.org>
2004-09-02 23:10 ` Kevin Rodgers
2004-09-03  2:11 ` Pascal Bourguignon
2004-09-03 10:20 ` Phillip Lord
2004-09-04  8:18 ` Alan Mackenzie
2004-09-04 11:09   ` Neil Woods
2004-09-06  0:00 ` Miles Bader
2004-09-17 19:45 ` giacomo boffi
2004-09-03 22:00 Joe Corneli
  -- strict thread matches above, loose matches on Subject: below --
2004-09-02 22:28 Joe Corneli

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