title: Xcode C++ and Objective-C refactoring
body: <p>Is there a way to <strong>refactor</strong> mixed C++/Objective-C code in Xcode ?? I am writing a game using Cocos2D and Box2D, and the Box2D is written on C++, so every class I write should have .mm extension and therefore when I try to e.g. rename the variable, I got a message like "<strong>Xcode can only refactor C and Objective-C code</strong>". </p>
  
  <p>Thanks in advance!</p>