="note_box"><img src="theme/lens.gif" width="15" height="16"> <b>Meta-functions</b><br>
      <br>
      What are meta-functions? We all know how functions look like. In simplest 
      terms, a function accepts some arguments and returns a result. Here is the 
      function we all love so much:<br>
      <br>
      <code><span class="keyword">int</span> identity_func<span class="special">(</span><span class="keyword">int</span> 
      arg<span class="special">)</span><br>
      <span class="special">{</sp