 class="identifier">Iterator</span> <span class="identifier">connect</span><span class="special">(</span>
    <span class="identifier">basic_socket</span><span class="special">&lt;</span> <span class="identifier">Protocol</span><span class="special">,</span> <span class="identifier">SocketService</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <span class="identifier">s</span><span class="special">,</span>
    <span class="identifier">Iterator</span> <span class="identifier">begi