mber">0.01</span> <span class="special">)</span> <span class="special">,</span> <span class="number">0.0</span> <span class="special">,</span>
                                <span class="special">[](</span> <span class="keyword">double</span> <span class="identifier">sum</span> <span class="special">,</span> <span class="keyword">const</span> <span class="identifier">state_type</span><span class="special">&amp;</span> <span class="identifier">x</span> <span class="special">)</span> <span class="special">{<