title: Qt Turkish characters in regular expressions
body: <p>I want to validate QLineEdit's text with a regular expression. It should allow characters from a to z plus A to Z plus Turkish characters(ğüşöçİĞÜŞÖÇ) plus numbers from 0 to 9. I googled about my problem and found two solutions but neither one worked for me. In one solution it says "include Turkish characters in regexp" and in other one it says "use unicodes of turkish characters"</p>
  
  <p>Below are two reqular expressions </p>
  
  <pre><code>QRegExp exp = QRegExp("^[a-zA-Z0-9ğüşöçİĞÜŞÖÇ]+$");
  
  QRegExp exp = QRegExp("^[a-zA-Z0-9\u00E7\u011F\u0131\u015F\u00F6\u00FC\u00C7\u011E\u0130\u015E\u00D6\u00DC]+$");
  </code></pre>
  
  <p>Neither one of reqular expressions above can validate the name 'İSMAİL'.
  Also I tried a text only contains Turkish characters('ğüşöçİĞÜŞÖÇ') but it can not be validated.
  When I remove 'İ' character from both texts they can be validated. I guess the problem may be related with 'İ' character.</p>
  
  <p>How can I solve the problem?</p>
  
  <p>Note: We are using Qt 4.6.3 in our project.</p>