       Arbitrary types
              </p></dd>
</dl>
</div>
<h6>
<a name="spirit.advanced.customize.clear_value.h5"></a>
          <span class="phrase"><a name="spirit.advanced.customize.clear_value.expression_semantics"></a></span><a class="link" href="clear_value.html#spirit.advanced.customize.clear_value.expression_semantics">Expression
          Semantics</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
         