<span class="Identifier">dup</span>

<span class="Keyword">var</span> <span class="Identifier">x</span> <span class="Operator">=</span> <span class="StringLit">&quot;The quick brown fox jumps over the lazy dog.&quot;</span>
<span class="Identifier">crc32</span><span class="Punctuation">(</span><span class="Identifier">x</span><span class="Punctuation">)</span>  <span class="Comment">## In-Place.</span>
<span class="Identifier">doAssert</span> <span class="Identifier">x</span> <span class="Operator">==</span