</p>

<p>
Reads of memory locations larger than a single machine word
are encouraged but not required to meet the same semantics
as word-sized memory locations,
observing a single allowed write <i>w</i>.
For performance reasons,
implementations may instead treat larger operations
as a set of individual machine-word-sized operations
in an unspecified order.
This means that races on multiword data structures

</pre>

<p>
If the type of the argument to <code>clear</code> is a
<a href="#Type_parameter_declarations">type parameter</a>,
all types in its type set must be maps or slices, and <code>clear</code>
performs the operation corresponding to the actual type argument.
</p>

<p>
If the map or slice is <code>nil</code>, <code>clear</code> is a no-op.
</p>


<h3 id="Close">Close</h3>

<p>