an class="w">  </span><span class="n">printf</span><span class="p">(</span><span class="s">&quot;f3(%s)</span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">node</span><span class="p">.</span><span class="n">c_str</span><span class="p">());</span>
<span class="p">}</span></pre><aside class="m-note m-warning"><h4>Attention</h4><p>A key advantage of Taskflow&#x27;s pipeline programming model is that we do not provide any data abstraction 