NT_2D</span><span class="special">(</span><span class="identifier">my_point</span><span class="special">,</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">cs</span><span class="special">::</span><span class="identifier">cartesian</span><span class="special">,</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">y</span><span class="special">)</span>

<span class="comment">// Register the box type, also notifying that it