From: Dave Aitel (daveimmunitysec.com)
Date: Mon Nov 22 2004 - 06:42:09 CST

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This is a bit out of yacc.py . So in Python, the IsNot operator is
written "not id()". This directly violates their first claim, and
pre-dates it, and is public, and as far as I know, renders it invalid.
But I think they clearly showed their strategy here. Just patent
anything small that would be required to maintain compatability. I think
Mono is screwed for this reason. Gnome should have bet on a Python tool
chain.

Our patent system is basically out of control. But there are ways to
fight back. For every nuclear weapon requiring a expensive reactor,
there's a biological one that can be grown in your backyard. I won't
give it away here though. :>

-dave

    # Compute the LR(0) goto function goto(I,X) where I is a set
    # of LR(0) items and X is a grammar symbol. This function is written
    # in a way that guarantees uniqueness of the generated goto sets
    # (i.e. the same goto set will never be returned as two different Python
    # objects). With uniqueness, we can later do fast set comparisons using
    # id(obj) instead of element-wise comparison.

halvargmx.de wrote:

> Somebody (presumably MS engineers ?) is trying to patent the "IsNot"
> Operator for BASIC.
>
> http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220040230959%22.PGNR.&OS=DN/20040230959&RS=DN/20040230959
>
>
> Boggling.
>
> Cheers,
> Halvar
>
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