ty</strong></span>: Linear to the number of element of the source tree plus the. number of elements of tree target tree when calling this function.</p>
<p><span class="bold"><strong>Throws</strong></span>: If cloner functor throws. If this happens target nodes are disposed. </p>
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<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> KeyType<span class="special">,</span> <span class="keyword">typename<