lass="special">::</span><span class="identifier">value_of_data</span></code></a>, <a class="link" href="../sequence/intrinsic/metafunctions/value_at.html" title="value_at"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">value_at</span></code></a>, <a class="link" href="../sequence/intrinsic/metafunctions/value_at_c.html" title="value_at_c"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">