title: Regular expression match only if subpattern doesn't match
body: <p>I'm trying to match C style comments form a file, but only if the comment don't start with a certain labels introduced by <code>@</code></p>
  
  <p>For example from</p>
  
  <pre><code>/* some comment to match */
  /* another comment.
  this should match also */
  /*@special shouldn't match*/
  </code></pre>
  
  <p>Is this possible using regular expressions only?</p>
  
  <p>I'm trying this using JavaScript implementation of regular expressions.</p>