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Re: [Scheme-reports] More NaN and Infsanity

On Sat, Apr 28, 2012 at 04:49:24PM -0400, John Cowan wrote:
> Given that the six R6RS implementations are split 3-3, and that all the
> Java ones prefer +nan.0, I don't think it's worth filing a ticket to
> standardize this behavior.  Fast is almost certainly better than right
> in this case.

Fast would *probably* be returning either +nan.0 or +inf.0, whichever is
encountered first.  I'm not sure that's the best thing to do.

If fast is best, then (> 1.0 +nan.0 'some-symbol) should return #f.
Currently, that's exactly what Chicken does and I consider it slightly
broken but probably not important enough to fix.

> > What should the value of the various trig functions be given nan/inf
> > values?
> Whatever IEEE 754 says.  Editorial ticket #365 will add more examples
> (probably ripped off from R6RS) for the transcendental functions.

I'll take a look at that.

Thanks, John!

"The process of preparing programs for a digital computer
 is especially attractive, not only because it can be economically
 and scientifically rewarding, but also because it can be an aesthetic
 experience much like composing poetry or music."
							-- Donald Knuth

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