(C++Std [copyassignable]), as well as the additional requirements listed
below.
</p>
+<p>
+ No copy or move operation of the type <code class="computeroutput">X</code> shall exit via an exception.
+ </p>
<div class="table">
<a name="boost_asio.reference.Protocol.t0"></a><p class="title"><b>Table 23. Protocol requirements</b></p>
<div class="table-contents"><table class="table" summary="Protocol requirements">