[Haskell-cafe] Re: QuickCheck: test passes in GHCi, fails when compiled

Brandon S. Allbery KF8NH allbery at ece.cmu.edu
Wed Jan 13 05:21:43 EST 2010

On Jan 13, 2010, at 05:07 , Lauri Pesonen wrote:
> I expect this to be a known issue with floats. Sorry for the noise.

Yep.  There's a faction that wants Float and Double to not be in the  
Eq typeclass, because floating point calculations can never reliably  
be compared for equality.  (There are some "infinite precision float"  
packages out there, but transcendentals will still get you in trouble  
even if repeating decimals don't.)

brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH

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