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Talk:Physical equality

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Should the code not be
 
<haskell>
 
x === y = unsafePerformIO $ do
 
px <- x `seq` newStablePtr x
 
py <- y `seq` newStablePtr y
 
let ret = px == py
 
freeStablePtr px
 
freeStablePtr py
 
return ret
 
</haskell>
 
?
 
 
--David M, 20 Dec 2010
 
 
 
GHC already has physical equality testing via GHC.Exts.reallyUnsafePtrEquality#
 
GHC already has physical equality testing via GHC.Exts.reallyUnsafePtrEquality#
   

Latest revision as of 19:20, 20 December 2010

GHC already has physical equality testing via GHC.Exts.reallyUnsafePtrEquality#

--Lemmih 15:00, 29 July 2006 (UTC)


No need to talk about OCaml's nan: Prelude> 0/0 NaN Prelude> 0/0 == 0/0 False