n><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">quadrature</span><span class="special">::</span><span class="identifier">gauss</span><span class="special">&lt;</span><span class="identifier">Real</span><span class="special">,</span> <span class="number">30</span><span class="special">&gt;</span> <span class="identifier">integrator</span><span class="special">;</span>
<span class="identifier">Complex</span> <span class="identifier">