data MyException = MkExc Int String
... but now it seems I have to install this as an instance of Typeable, and I don't see how to do that.
instance Typeable MyException where typeOf ? = ?
import Data.Dynamic
myExceptionTc = mkTyCon "MyException"
instance Typeable MyExceptionBasicSpec where
typeOf _ = mkAppTy myExceptionTc []The above should work, but I wonder when it is possible to simply derive Typeable?
Cheers Christian
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