s="lineno">  149</span>&#160;<span class="comment">                col_type&amp; operator[](size_type i);</span></div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;<span class="comment">                col_type const &amp; operator[](size_type i) const;</span></div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;<span class="comment