rogramlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">,</span><span class="keyword">typename</span> <span class="identifier">V</span><span class="special">&gt;</span> <span class="keyword">struct</span> <span class="identifier">is_dim</span><span class="special">&lt;</span> <span class="identifier">dim</span><span class="special">&lt;</span><span class="identifier">T</span><span class=