title: What is the purpose of the underscore in _(node)->Execute() for c++
body: <p>The underscore, in this case, is not part of the identifier. The code I'm seeing looks like</p>
  
  <pre><code>for(auto nodeItr = myNodes.begin(); nodeItr != myNodes.end(); nodeItr++) {
      auto node = *nodeItr;
      int status = _(node)-&gt;Execute();
      if (status != 0) return -1;
  }
  </code></pre>