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<pre id='vimCodeElement'>
<a name="L1"></a><span id="L1" class="LineNr"> 1 </span><span class="Comment"># compare mutable.mu</span>
<a name="L2"></a><span id="L2" class="LineNr"> 2 </span>
<a name="L3"></a><span id="L3" class="LineNr"> 3 </span><span class="muRecipe">def</span> main [
<a name="L4"></a><span id="L4" class="LineNr"> 4 </span>  <span class="Constant">local-scope</span>
<a name="L5"></a><span id="L5" class="LineNr"> 5 </span>  x:&amp;:num <span class="Special">&lt;-</span> new <span class="Constant">number:type</span>
<a name="L6"></a><span id="L6" class="LineNr"> 6 </span>  foo x
<a name="L7"></a><span id="L7" class="LineNr"> 7 </span>]
<a name="L8"></a><span id="L8" class="LineNr"> 8 </span>
<a name="L9"></a><span id="L9" class="LineNr"> 9 </span><span class="muRecipe">def</span> foo x:&amp;:num [
<a name="L10"></a><span id="L10" class="LineNr">10 </span>  <span class="Constant">local-scope</span>
<a name="L11"></a><span id="L11" class="LineNr">11 </span>  <span class="Constant">load-ingredients</span>
<a name="L12"></a><span id="L12" class="LineNr">12 </span>  *x <span class="Special">&lt;-</span> copy<span class="Constant"> 34</span>  <span class="Comment"># will cause an error because x is immutable in this function</span>
<a name="L13"></a><span id="L13" class="LineNr">13 </span>]
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