From: Hiro Asari <asari.ruby@...>
Date: 2012-01-12T08:24:29+09:00
Subject: [ruby-core:42069] [ruby-trunk - Bug #5884] Float::NAN and 0.0/0.0 is represented differently when packed with 'g'


Issue #5884 has been updated by Hiro Asari.


Besides it being status quo, what is the rationale behind not having Float::NAN and 0.0/0.0 act identically?

As Brian mentioned, until the introduction of Float::NAN, 0.0/0.0 acted as a means of getting IEEE 754 NaN. If the intent for Float::NAN is to act as *the* NaN, then it seems reasonable to expect these objects to behave the same way in all manners possible.

Of course, if the purpose of Float::NAN is *not* to act as an identical object as 0.0/0.0, then this argument will not hold water.

I don't have a personal stake in this manner; I just want a clarification. Thank you.
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Bug #5884: Float::NAN and 0.0/0.0 is represented differently when packed with 'g'
https://bugs.ruby-lang.org/issues/5884

Author: Hiro Asari
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0dev (2011-12-31 trunk 34165) [x86_64-darwin11.2.0] 


$ ruby2.0 -e 'p [Float::NAN].pack("g")'
"\x7F\xC0\x00\x00"

$ ruby2.0 -e 'p [0.0/0.0].pack("g")'
"\xFF\xC0\x00\x00"

It would be nice to have Float::NAN and 0.0/0.0 behave identically in this regard.


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