private void lastvt_insert(String VN, String VT)
{
if (!LASTVT.ContainsKey(VN))
{
LASTVT.Add(VN, new HashSet <string>());
}
LASTVT[VN].Add(VT);
stack.Add(new myitem(VN, VT));
}
public void clean_work()
{
Rules.Clear();
FIRSTVT.Clear();
LASTVT.Clear();
stack.Clear();
buf = null;
sourcetext = "";
SymbolTable.Clear();
//stringmask.Clear();
Matrix.Clear();
error_msg = "";
error_status = 0;
History.Clear();
Rules_mapping.Clear();
}
