                    col_type <span class="keyword">const</span> &amp; v0,</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;                        col_type <span class="keyword">const</span> &amp; v1,</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;                        col_type <span class="keyword">const</span> &amp; v2);</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a n