6. My module applies Data.Set.null (s :: Set a),
and null (xs :: [a]).
Why ghc reports of the clash with GHC.List.null ?
Is GHC.List same as old List library module?
Should I write
import GHC.List (genericLength, null)
instead of import List (genericLength)
?
As the documentation reads:
This module is intended to be imported qualified, to avoid name clashes
with Prelude
<http://www.haskell.org/ghc/docs/latest/html/libraries/base/Prelude.html>
functions. eg.
import Data.Set as Set
So, you should write:
import qualified Data./x/ as /y/
Now, no name clashes will occur. However, you will have to write
/y/.null to access null in /x/, for example:
import qualified Data.Set as Set
if (Set.null ...) then ... else ...
Regards,
Robert
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