title: match letters a to z in a enum type as if were in a flexer file
body: <p>Moring,  </p>
  
  <p>I just wanna whatever string to fit in my enum type defined, as if were in a flexer file and i'm struggling with that , hope you guys can help me. 
  this is an example of the issue i wanna resolve.</p>
  
  <pre><code>enum Token 
  {
      AND = '^',
      OR =  'V', 
      string = -- here is when im struggling
  }
  </code></pre>
  
  <p>since in a flexer file is just like this  <code>[a-z]*</code> and you can match any string with it,  but I'm not using  flex. I already achieved it with only special characters as showed in the example. 
  But don't know if there is an approach to achieve it with whatever string </p>