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<p>Returns the number of <code class="computeroutput"><a class="link" href="shared_ptr.html" title="Class template shared_ptr">shared_ptr</a></code> objects, *this included, that share ownership with *this, or an unspecified nonnegative value when *this is empty. use_count() is not necessarily efficient. Use only for debugging and testing purposes, not for production code. </p>
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<pre class="literallayout"><span class="keyword">void</span> <a name="idp56315744-bb"></a><span class