From: surendra
Subject: any way to automatically avoid recursive printin
Date: Sun, 07 Nov 2004 07:00:08 +0000
Message-ID: <cmkh5q$rj$1@news.asu.edu>

Hi,
  I want to print a structure which contains reference to another which 
structure which in turn points to it.

I was trying to print it, but my system (clisp) was crashing without 
printing anything or giving any error message, and it took me a long 
time to realize that the interpreter is going into an infinite loop, 
which is making it crash. Is there any way to prevent the interpreter 
from going into such loops any flag or something which prevents it?
Or do I have to make sure while programming that it doesn't happen?


Thanks,

Surendra Singhi

• Re: any way to automatically avoid recursive printin Szymon
  • Re: any way to automatically avoid recursive printin Barry Margolin

From: Szymon
Subject: Re: any way to automatically avoid recursive printin
Date: Sun, 07 Nov 2004 10:16:48 +0000
Message-ID: <877joyhskv.fsf@eva.rplacd.net>

surendra <·········@netscape.net> writes:

> Hi,
>   I want to print a structure which contains reference to another
>   which structure which in turn points to it.

> [.....]

Try (SETQ *PRINT-CIRCLE* T).

HTH, Szymon.

From: Barry Margolin
Subject: Re: any way to automatically avoid recursive printin
Date: Sun, 07 Nov 2004 17:09:26 +0000
Message-ID: <barmar-E472B8.12092607112004@comcast.dca.giganews.com>

In article <··············@eva.rplacd.net>, Szymon <············@o2.pl> 
wrote:

> surendra <·········@netscape.net> writes:
> 
> > Hi,
> >   I want to print a structure which contains reference to another
> >   which structure which in turn points to it.
> 
> > [.....]
> 
> Try (SETQ *PRINT-CIRCLE* T).

Setting *PRINT-DEPTH* to non-NIL should also suffice.  Unless the 
structure has a PRINT-OBJECT method that ignores the depth parameter.

-- 
Barry Margolin, ······@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***