pan class="identifier">push_back</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">make_tuple</span><span class="special">(</span><span class="number">1.0</span><span class="special">,</span> <span class="number">2.0</span><span class="special">));</span>
    <span class="identifier">poly</span><span class="special">.</span><span class="identifier">outer</span><span class="special">().</span><span class="identifier">push_back</sp