1 data Expr b ;
1 data CoreRule ;
-1 data CoreRules = Rules [CoreRule] VarSet.IdOrTyVarSet ;;
+1 data CoreRules = Rules [CoreRule] VarSet.IdOrTyVarSet ;
1 emptyCoreRules _:_ CoreRules ;;
1 seqRules _:_ CoreRules -> PrelBase.() ;;
1 isEmptyCoreRules _:_ CoreRules -> PrelBase.Bool ;;