title: What is implicit sharing?
body: <p>I am building a game engine library in C++. A little while back I was using Qt to build an application and was rather fascinated with its use of <a href="http://doc.trolltech.com/latest/implicit-sharing.html">Implicit Sharing</a>. I am wondering if anybody could explain this technique in greater detail or could offer a simple example of this in action.</p>