title: vim make COLOR of user defined type same as basic type in C++
body: <p>I am trying to use vim as my C++ editor. But I find that it only highlight the basic C++ type (e.g. <code>int, double</code>) as some color.</p>
  
  <p>For user defined type or class, it does not give a color. I would like the <strong>color</strong> of <strong>user_defined_type</strong> in <code>user_defined_type &amp; a</code> has the same color as the <strong>int</strong> in <code>int &amp; a</code>.</p>
  
  <p>Is there any solutions or suggestions?</p>
  
  <p>Best,
  Zhihao</p>