pan class="p">[</span><span class="nx">tag</span><span class="p">]</span> <span class="o">=</span> <span class="nx">token</span>
      <span class="k">if</span> <span class="nx">tag</span> <span class="o">is</span> <span class="s1">&#39;TERMINATOR&#39;</span> <span class="o">and</span> <span class="nx">@tag</span><span class="p">(</span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">is</span> <span class="s1">&#39;THEN&#39;</span>
       