+let add_tops v =
+ if EU.exists_role_deleted st.ET.s st.ET.r || st.ET.t <> []
+ then EU.raise_error ET.ETops else
+ let ds, ts = EU.get_tops v st.ET.r in
+ if ds <> [] then begin
+ let r = {ET.v = st.ET.s; ET.o = ds; ET.n = []} in
+ st.ET.r <- EU.roles_union [false, r] st.ET.r
+ end;
+ if ts <> [] then st.ET.t <- ts
+