eady existing function objects
        </p>
<p>
          In order to deduce the return type of the function object, it has to implement
          the <a href="http://www.boost.org/doc/libs/release/libs/utility/utility.htm#result_of" target="_top">Boost.Result
          Of</a> protocol. If the bound function object is polymorphic, the resulting
          binding object is polymorphic.
        </p>
</div>
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