ghc-4.02 -c T.hs yields T.hs:1:11: parse error on input: ")"
for
-----------------------------------------------------------------
module T () where
ng1 x y = negate y
instance (Num a, Num b) => Num (a,b)
where
negate (a,b) = (ng 'c' a, ng1 'c' b) where ng x y = negate y
-----------------------------------------------------------------
This is against Haskell-98, is it?
Further, change this `()' to `(ng1)'.
Then the compiler does not warn of un-used variable x in the `negate'
definition. Setting `-fwarn-unused-matches' does not help.
Though, the ghc-4.02 docs mentions this un-used warning facility.
What is wrong here?
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Sergey Mechveliani
[EMAIL PROTECTED]
