title: unexpected '@' in program (Xcode)
body: <p>All of the sudden Xcode is giving me an error <em>"unexpected '@' in program"</em> at the beginning of my object <code>@interface</code>.  </p>
  
  <p>This is happening in a bunch of my objects that were previously working...</p>
  
  <p>Here's an example  (with errors in comments)</p>
  
  <pre><code>#import &lt;UIKit/UIKit.h&gt;
  #import "ONCOChordDiamond.h"
  @interface ONCOChordView : UIView   //// unexpected '@'  in program
  {
      NSMutableArray* chordDiamonds;    
      NSUInteger      diamondWidth, diamondHeight;
  }
  
  @end                                /////unexpected '@' in program'
  </code></pre>
  
  <p>So why is Xcode giving me this error?  It seems like a bug.</p>