title: Operators in C++ what does (::Type*)0 mean
body: <p>Can anyone tell me what this means? </p>
  
  <pre><code>(::Type*)0
  </code></pre>
  
  <p>actually it is part of this</p>
  
  <pre><code>return (is_modifytype()) ?
  u.myfunction : (::Type*)0; 
  </code></pre>