title: Swift: no calls to throwing functions occur within 'try' expression
body: <p>I'm trying process string and set "try"</p>
  
  <pre><code>var str = String()
  do{
      let str = try self.processMyString(strToProcess)
  
  }catch{
  
  }
  </code></pre>
  
  <p>But I'm getting this error:</p>
  
  <pre><code>no calls to throwing functions occur within 'try' expression
  </code></pre>
  
  <p>Any of you knows why of this error or how can I fix it?</p>
  
  <p>I'll really appreciate your help.</p>