Re: LOGO-L> QUESTION ON CONDITIONAL OUTPUTS

[Chuck Shavit <CShavit@MagicSquare.com>]

At 12:44 AM 4/26/98 -0400, George Mills wrote:
>I think your idea of a call stack of errors is great.
>But could get a bit messy on deeply recursive procedures.

Should be easy enough to add heuristics which will print something like
       ADD cannot add a non numeric value.  It had inputs A and 3.
       It was called from ADDLISTS [A 6] [9 2]
       Which was called from ADDLISTS [4 A 6] [1 9 2]
       ... (75 nested calls to ADDLISTS)
       Which was called from ADDLISTS [(78 members...)] [(78 members...)]
       Which was called from MAIN
       Which was called from the command line.

Plus (sorry Brian, I had to add this), messy traceback on deeply recursive
calls could demonstare the suitability of for-loop style iteration to some 
cases where recursion is an overkill.

Chuck Shavit
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