ppr_mono_ty _ (HsPArrTy ty) = pabrackets (ppr_mono_lty pREC_TOP ty)
ppr_mono_ty _ (HsModalBoxType ecn ty) = ppr_modalBoxType (ppr ecn) (ppr_mono_lty pREC_TOP ty)
ppr_mono_ty _ (HsPredTy pred) = ppr pred
ppr_mono_ty _ (HsPArrTy ty) = pabrackets (ppr_mono_lty pREC_TOP ty)
ppr_mono_ty _ (HsModalBoxType ecn ty) = ppr_modalBoxType (ppr ecn) (ppr_mono_lty pREC_TOP ty)
ppr_mono_ty _ (HsPredTy pred) = ppr pred