On Thu, Mar 18, 2010 at 1:21 PM, Rick Murphy
Using GHCi, I am working from an existing example which surprisingly contains a parse error in an export statement. I have reproduced the parse error as follows:
module Export ( (^) , (#) ) where import Prelude hiding ((^))
GHCi reports: parse error on input (#
I read 5.2 Export Lists in the Haskell Report, but the syntax above does not appear to contradict the Haskell Report.
That's probably due to you using GHCi in a version where the GHC-specific extension concerning # is active by default (with this extension (# 2, 3 #) is an unboxed strict pair). While it's probably possible to compile this code by making sure that the extension isn't active (for instance, using ghc instead of ghci), it is probably a better idea to avoid # as an operator name. -- Jedaï