Function lappend_oid

src/backend/nodes/list.c:371–384

* Append an OID to the specified list. See lappend() */

 * Append an OID to the specified list. See lappend()
 */
List *
lappend_oid(List *list, Oid datum)
{
	Assert(IsOidList(list));

	if (list == NIL)
		list = new_list(T_OidList, 1);
	else
		new_tail_cell(list);

	llast_oid(list) = datum;
	check_list_invariants(list);
	return list;
}

/*
 * Make room for a new cell at position 'pos' (measured from 0).