O, great. I didn't know you can write it this way. Tom Nielsen wrote:
newtype VMT m a = VMT {runVMT :: StateT VMState m a} deriving (Monad, MonadIO, MonadTrans, TransM, MonadState VMState)works here (ghc-6.10.3) On Wed, Sep 16, 2009 at 11:42 AM, Miguel Mitrofanov <[email protected]> wrote:newtype VMT m a = VMT {runVMT :: StateT VMState m a} deriving (Monad, MonadIO, MonadTrans, TransM) Unfortunately, you can't automatically derive MonadState, since it's a multi-paremeter type class. You'll have to write down the derivation yourself._______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
