 is a default-constructible model of <a class="link" href="../concepts.html#concepts.callpolicies" title="CallPolicies">CallPolicies</a>.
              </p></dd>
<dt><span class="term">Effects</span></dt>
<dd>
<p>
                The first form creates a Python callable object which, when invoked,
                converts its argument to a Target object x, and creates a Python
                iterator which traverses <code class="computeroutput"><span class="special">[</span><span class="identifier">bind</s