+{-# LANGUAGE BangPatterns #-} -- required for versions of Happy before 1.18.6
+{-# OPTIONS -Wwarn -XNoMonomorphismRestriction #-}
+-- The NoMonomorphismRestriction deals with a Happy infelicity
+-- With OutsideIn's more conservativ monomorphism restriction
+-- we aren't generalising
+-- notHappyAtAll = error "urk"
+-- which is terrible. Switching off the restriction allows
+-- the generalisation. Better would be to make Happy generate
+-- an appropriate signature.
+--