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Re: -0.0 treated as negative?
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From: |
Andy Wingo |
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Subject: |
Re: -0.0 treated as negative? |
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Date: |
Mon, 07 Jun 2010 23:28:24 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.92 (gnu/linux) |
Hi Bill,
On Mon 07 Jun 2010 16:00, "Bill Schottstaedt" <address@hidden> writes:
> I just noticed a case where -0.0 is apparently negative:
>
> scheme@(guile-user)> (/ 1.0 -0.0)
> -inf.0
> scheme@(guile-user)> (negative? -0.0)
> #f
Interesting. R5RS seems to be mute on negative zeros. The behavior of
negative? is correct according to R6RS, and the result (/ 1.0 -0.0)
follows IEEE 754, I think; so while odd, it does not seem to be a bug.
Let me know if I'm missing something here.
> scheme@(guile-user)> (expt #t 0)
> 1
Haha, that's amusing :) Will fix.
Andy
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