As per tagged nans, check for JavaScript tagged NaN optimization. Essentially, the tag of the NaN (i.e. the mantissa) is interpreted as a pointer. Obviously, this is a very advanced use case, probably not worth Python guaranteeing such behavior. Here is one article: https://brionv.com/log/2018/05/17/javascript-engine-internals-nan-boxing/
On Sat, Sep 12, 2020, 8:10 PM David Mertz <me...@gnosis.cx> wrote: > On Sat, Sep 12, 2020, 2:02 PM Steven D'Aprano <st...@pearwood.info> wrote: > >> In general though, Python doesn't support generating the full range of >> NANs with payloads directly. > > > I've researched this a little bit for discussion in a book I'm writing, > and I have not been able to identify ANY widely used programming language > or tool that does anything meaningful with the NaN payloads. > > It's possible I've missed something, but certainly not the top 20 > languages are libraries that might come to mind. > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/FZ7QGRV5IRV2WFX6YFDO7KR5C2Y5BJHG/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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