[GHC] #9530: min / max do not always return the other argument when one of the arguments is NaN
GHC
ghc-devs at haskell.org
Sun Aug 31 23:02:42 UTC 2014
#9530: min / max do not always return the other argument when one of the arguments
is NaN
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Reporter: jrp | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Prelude | Version: 7.8.3
Resolution: | Keywords:
Operating System: MacOS X | Architecture: Unknown/Multiple
Type of failure: Incorrect | Difficulty: Easy (less than 1
result at runtime | hour)
Test Case: | Blocked By: 9276
Blocking: | Related Tickets: 9276
Differential Revisions: |
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Comment (by carter):
@jrp, in this case the IEEE standard doesn't make sense to comply with, if
you read that julia lang ticket about the min/max behavior, theres an
inline email by one of the IEEE spec authors about the motivation for the
nan evading behavior.
though I do agree from a strict IEEE compliant behavior standpoint, it is
nonconforming, this is a very clear example (perhaps the ONLY example)
where min/max are better off being implemented in a different way. Haskell
has no need for using Nan to pun representing missing data. (see that
julia lang thread for a longer discussion on the matter)
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9530#comment:8>
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