title: Xcode claims "this" is a reserved language keyword in C?
body: <p>I used Xcode's <code>Refactor &gt; Rename</code> command to try and rename a method parameter <code>this</code> in C. </p>
  
  <p>It's claiming <code>this</code> is a "reserved language keyword", but, to the best of my understanding, it is not. </p>
  
  <p>Is this a bug in Xcode? Or am I missing something?</p>
  
  <p><img src="https://i.stack.imgur.com/J3fyQ.jpg" alt="C Reserved Language Keyword?"></p>