Subject: Out of range floating point number determination
From: Rupert Swarbrick
Date: Mon, 13 Aug 2012 12:03:05 +0100
Stavros Macrakis <macrakis at alum.mit.edu> writes:
> I'd be interested to know whether this works on other
> implementations.
Not looking promising on SBCL:
Maxima 5.28.0 http://maxima.sourceforge.net
using Lisp SBCL 1.0.58
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) non_finite(x) := not is(x-x = 0.0)$
(%i2) xinf: float(10^400)$
Maxima encountered a Lisp error:
Too large to be represented as a DOUBLE-FLOAT:
100000000000000000000[...snip lots of zeros...]00
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.
(%i3) xinf;
(%o3) xinf
(%i4)
Where is the error caught when running under GCL? Or does GCL just not
raise an error?
Rupert