>
<a name="spirit.advanced.customize.clear_value.h6"></a>
          <span class="phrase"><a name="spirit.advanced.customize.clear_value.predefined_specializations"></a></span><a class="link" href="clear_value.html#spirit.advanced.customize.clear_value.predefined_specializations">Predefined
          Specializations</a>
        </h6>
<p>
          <a href="http://boost-spirit.com" target="_top">Spirit</a> predefines specializations
          of this customization point for several types. The following table 