Why GHC doesn't warn about LHS nullary-constructor pattern bindings?
Christopher Done
chrisdone at gmail.com
Thu Jul 19 13:07:38 CEST 2012
In your case the Nothing is unused so will never be a problem.
Perhaps more worrying:
foo :: Int -> Int
foo n = x + 1
where
Just x = Nothing
This gives no warnings.
More information about the Glasgow-haskell-users
mailing list