span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">...</span> I<span class="special">&gt;</span> 
        <span class="keyword">void</span> <a name="boost.unit_test.data.invoke_action_impl"></a><span class="identifier">invoke_action_impl</span><span class="special">(</span><span class="identifier">Action</span> <span class="keyword">const</span> <span class="special">&amp;</span> action<span class="speci