title: How can I keep doxygen from documenting #defines in a C file?
body: <p>I have <code>#define</code> values in headers that I certainly want Doxygen to document but I have others in <strong>C</strong> files that I treat as static constants and I don't want Doxygen to document them.  Something as simple and stupid as</p>
  
  <pre><code>#define NUMBER_OF(a) (sizeof((a))/sizeof((a)[0]))
  #define MSTR(e) #e
  </code></pre>
  
  <p>How can I keep Doxygen from putting those <code>#define</code>s in the documentation it creates? I've tried marking it with <code>@internal</code> but that didn't seem to help.</p>
  
  <p>A somewhat-related question on Doxygen and <code>#define</code>, how can I get:</p>
  
  <pre><code>#define SOME_CONSTANT 1234 /**&lt; An explanation */
  </code></pre>
  
  <p>to put "SOME_CONSTANT" and "An explanation" but not "1234" in the output?</p>