Emil Axelsson wrote:
Stephan Friedrichs skrev:
Emil Axelsson wrote:
[...]
The error comes from using QuickCheck 2, which happens to also use the operator (><). I can see two ways to solve the problem:
(1) Add "< 2" after "QuickCheck" in the Wired.cabal file.
(2) Add "hiding ((><))" after "import Test.QuickCheck" in Data/Hardware/Internal.hs
Emil,
my suggestion is: Please use alternative (2), at least if there are no further problems with quickcheck 2! Otherwise, depending on quickcheck <2 just introduces unnecessary package incompatibilities.
Hi Stephan,
Option (1) was only meant as a temporary solution for Cetin. It just occurred that the obvious solution to make both QC1 and QC2 users happy is to have an explicit import list rather than hiding (><) (there are no further problems with QC2). I'll do this until QC2 is standard in GHC.
I stumbled over the same thing in a project of mine. I must say that I find it very unfortunate that QuickCheck-2 exports this operator, since it clashes with imports of Data.Sequence. Could the decision to use this operator in QuickCheck be revised (and similarly export of .&. which clashes with the one in Data.Bits)? I think these operators should have a 'standard' meaning. Cheers Ben