an class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="n">parser</span><span class="p">%</span><span class="n">postfix</span><span class="p">%</span><span class="n">top_index</span><span class="w"></span>

<span class="w">      </span><span class="n">t</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">parser</span><span class="p">%</span><span class="n">postfix</span><span class="p">%</span><span class="n">tokens