r">N</span><span class="special">&gt;</span></code>
            is a counterpart of <code class="computeroutput"><a class="link" href="../intrinsic/metafunctions/at_c.html" title="at_c"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">at_c</span></code></a><span class="special">&lt;</span><span class="identifier">S</span><span class="special">,</span> <span class="identifier">N</span><span class="special">&gt;</span></code>
       