_ = imag(3 << s)                   // illegal: 3 assumes complex type, cannot shift
</pre>

<p>
Arguments of type parameter type are not permitted.
</p>


<h3 id="Deletion_of_map_elements">Deletion of map elements</h3>

<p>
The built-in function <code>delete</code> removes the element with key
<code>k</code> from a <a href="#Map_types">map</a> <code>m</code>. The