>pull_type</span><span class="special">&amp;</span> <span class="identifier">in</span><span class="special">){</span>
        <span class="comment">// finish the last line when we leave by whatever means</span>
        <span class="identifier">FinalEOL</span> <span class="identifier">eol</span><span class="special">;</span>
        <span class="comment">// pull values from upstream, lay them out 'num' to a line</span>
        <span class="keyword">for</span> <span class="special">(;;){</span>
            <s