+-- Vectorisation
+mkVectOcc = mk_simple_deriv varName "$v_"
+mkVectTyConOcc = mk_simple_deriv tcName ":V_"
+mkVectDataConOcc = mk_simple_deriv dataName ":VD_"
+mkVectIsoOcc = mk_simple_deriv varName "$VI_"
+mkPArrayTyConOcc = mk_simple_deriv tcName ":VP_"
+mkPArrayDataConOcc = mk_simple_deriv dataName ":VPD_"
+mkPADFunOcc = mk_simple_deriv varName "$PA_"