t_of_optional_references.html" title="Rebinding semantics for assignment of optional references">Rebinding
        semantics for assignment of optional references</a>
</h4></div></div></div>
<p>
          If you assign to an <span class="emphasis"><em>uninitialized </em></span> <code class="computeroutput"><span class="identifier">optional</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&amp;&gt;</span></code> the effect is to bind (for the
          first time)