copy/destruct</h3>
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<pre class="literallayout"><a name="idp56318192-bb"></a><span class="identifier">shared_ptr</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Constructs an empty <code class="computeroutput"><a class="link" href="shared_ptr.html" title="Class template shared_ptr">shared_ptr</a></code>. Use_count() == 0 &amp;&amp; get()== 0. </p>
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