class="Keyword">of</span> <span class="Keyword">as</span> <span class="Keyword">from</span>

<span class="Comment"># bool</span>
  <span class="Keyword">not</span><span class="Punctuation">,</span> <span class="Keyword">and</span><span class="Punctuation">,</span> <span class="Keyword">or</span><span class="Punctuation">,</span> <span class="Keyword">xor</span><span class="Punctuation">,</span> <span class="Operator">&lt;</span><span class="Punctuation">,</span> <span class="Operator">&lt;=</span><span clas