public void populateTypeTable(AstSymbolTable t)
        {
            if (m_stable == null)
                {
                m_stable = new AstSymbolTable();
                }
            int i;
            for (i = 0; i < m_paras.size(); i++)
                {
                ((AstBase) m_paras.get(i)).populateTypeTable(m_stable);
                }
        }