Brendon> Seems that parsing negative numbers is outside of the scope of
Brendon> this routine. Here's the source (which is Frederik's source
Brendon> with one minor renaming; I take no credit here); anyone have
Brendon> any ideas?
Negative numbers are actually tokenized as a MINUS followed by a NUMBER:
% python
Python 2.5b2 (trunk:50921, Jul 28 2006, 20:21:50)
[GCC 4.0.0 (Apple Computer, Inc. build 5026)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> - 47
-47
Try changing your atom function to detect a minus sign, remember that fact,
then require the next token to be a number.
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