title: Flex(lexer) support for unicode
body: <p>I am wondering if the newest version of flex supports unicode?</p>
  
  <p>If so, how can use patterns to match Chinese characters?</p>
  
  <p>More:
  <a href="https://stackoverflow.com/questions/9576384/use-regular-expression-to-match-any-chinese-character-in-utf-8-encoding">Use regular expression to match ANY Chinese character in utf-8 encoding</a></p>