class="literal">*=</code>, etc.) are stored as references to non-const.</p></li>
<li class="listitem"><p>If the left argument of <code class="literal">&lt;&lt;</code> or <code class="literal">&gt;&gt;</code>  operator is derived from an instantiation of <code class="literal">basic_ostream</code> or respectively from <code class="literal">basic_istream</code>, the argument is stored as a reference to non-const. 
For all other types, the argument is stored as a copy.
</p></li>
<li class="listitem"><p>
In poin