title: Objective-C literals for NSSet and NSOrderedSet?
body: <p>What, if any, NSSet and NSOrderedSet operations can one perform with the new Objective-C collection literals?</p>
  
  <p>For NSArray, NSDictionary, and NSNumber, see <a href="https://stackoverflow.com/questions/9347722/apple-llvm-4-0-new-features-on-xcode-4-4-literals">here</a>.</p>
  
  <p>FWIW, <a href="http://weblog.bignerdranch.com/398-objective-c-literals-part-1/" rel="noreferrer">this Big Nerd Ranch Post</a> says the indexing syntax is supposed to work for NSOrderedSet.  But in my tests it does not.  And I haven't been able to find anything about creating ordered sets.</p>