ication is preserved and propagated appropriately. In other
          words, only const versions of <code class="literal">operator()</code> can be used
          if the target function object is const - or, in case the target function
          object is held by value, the adapter is const.
        </p>
<h6>
<a name="fusion.functional.adapters.unfused.h1"></a>
          <span class="phrase"><a name="fusion.functional.adapters.unfused.header"></a></span><a class="link" href="unfused.html#fusion.functional.ad