n>
  <span class="keyword">typedef</span> <span class="keyword">void</span>                     <span class="identifier">reference</span><span class="special">;</span>

  <span class="keyword">explicit</span> <span class="identifier">function_output_iterator</span><span class="special">();</span>

  <span class="keyword">explicit</span> <span class="identifier">function_output_iterator</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">UnaryFunction</span><span c