"keyword">private</span><span class="special">:</span>
   <span class="identifier">T</span> <span class="identifier">m_arc</span><span class="special">;</span>     <span class="comment">// length of arc.</span>
   <span class="identifier">T</span> <span class="identifier">m_radius</span><span class="special">;</span>  <span class="comment">// one of the two radii of the ellipse</span>
<span class="special">};</span>  <span class="comment">// struct elliptic_root__functor_1deriv</span>
</pre>
<p>
        The