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Re: [Chicken-hackers] [PATCH] Distinguish between positive and negative
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From: |
felix . winkelmann |
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Subject: |
Re: [Chicken-hackers] [PATCH] Distinguish between positive and negative zero in flonums |
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Date: |
Mon, 29 Jul 2019 11:39:26 +0200 |
> That seems totally right to me.
>
I wholeheartily disagree.
> On Sun, Jul 28, 2019 at 1:06 AM Evan Hanson <address@hidden> wrote:
>
> > Thanks Peter, applied.
> >
> > On Sat, Jun 29, 2019 at 03:26:54PM +0200, Peter Bex wrote:
> > > I'm not happy with the hacky way the reader deals with these, but I could
> > > not really come up with a clean solution for it. Suggestions for
> > > improvement are welcome.
> >
> > I experimented a bit with splitting the "go negative" logic from the "go
> > inexact" logic to perhaps make things more clear and avoid passing a
> > boolean around, but it didn't really help.
> >
> > One thing I noticed is that now (signum -0.0) => -0.0. Does that seem
> > right? If so, it may be worth documenting that it's both exactness and
> > sign-preserving.
felix