span class="special">{}</span>
<span class="special">};</span>

<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">==</span> <span class="special">(</span><span class="identifier">point</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">left</span><span class="special">,</span> <span class="identifier">point</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">right</sp