n>
        the internal range checking logic.
      </p>
      <p>
        It supplies the <code class="computeroutput"><span class="identifier">validate_range</span><span class="special">()</span></code> static member function exposed by the converter,
        which means that it publicly inherits from this policy.
      </p>
      <p>
        The policy must have the following interface:
      </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span clas