Author mark.dickinson
Recipients mark.dickinson, skrah, steven.daprano
Date 2012-08-03.12:06:44
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Message-id <1343995605.27.0.275832929857.issue15544@psf.upfronthosting.co.za>
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> Decimal('snan').is_nan()
> just returns true and I am under the impression that IEEE 754 specifies > the same.

Sure, but IEEE 754 also specifies that math.sqrt(<signalling nan>) should signal.  Since both math.sqrt and math.isnan are going through __float__, we can't keep everyone happy here.

The question for me is really what __float__ should do.  IEEE 754 doesn't help here, since it doesn't cover decimal floating-point <-> binary floating-point conversions.
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Date User Action Args
2012-08-03 12:06:45mark.dickinsonsetrecipients: + mark.dickinson, steven.daprano, skrah
2012-08-03 12:06:45mark.dickinsonsetmessageid: <1343995605.27.0.275832929857.issue15544@psf.upfronthosting.co.za>
2012-08-03 12:06:44mark.dickinsonlinkissue15544 messages
2012-08-03 12:06:44mark.dickinsoncreate