ier">T9</span><span class="special">,</span>
     <span class="keyword">typename</span> <span class="identifier">T10</span> <span class="special">&gt;</span>
    <span class="identifier">base_from_member</span><span class="special">(</span> <span class="identifier">T1</span> <span class="identifier">x1</span><span class="special">,</span> <span class="identifier">T2</span> <span class="identifier">x2</span><span class="special">,</span> <span class="identifier">T3</span> <span class="identifier">x3</span><s