title: :: without a namespace
body: <p>Consider the following line of code:</p>
  
  <pre><code>::CGContextRef cgContext = cocoa::createCgBitmapContext( surface );
  </code></pre>
  
  <p>How come there's <strong>no namespace specified before ::</strong> ?
  Does that mean it's using the same namespace as the class you're in? </p>