   <span class="comment">// This method is expected to return true if the end of input is </span>
        <span class="comment">// reached. It is often used in the implementation of the function</span>
        <span class="comment">// storage_policy::is_eof.</span>
        <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">MultiPass</span><span class="special">&gt;</span>
        <span class="keyword">static</span> <span clas