title: check circumflex character with Regexp
body: <p>I'm trying to check some special characters in a configuration file. </p>
  
  <p>I'm able to check the following symbols : </p>
  
  <ul>
  <li>#</li>
  <li>$</li>
  <li>*</li>
  <li>&amp;</li>
  <li>|</li>
  </ul>
  
  <p>But I can't to parse the "^" symbol in my configuration file.  I tried with the following regexp : </p>
  
  <p><code>.*[(\^)].*</code> , <code>.*[("^")].*</code> , but it doesn't work... </p>
  
  <p>I you have any idea to check that...  I'm using a specific language (similar to C Language). </p>