pan><a class="link" href="is_char.html#spirit.advanced.customize.string_traits.is_char.when_to_implement">When
            to implement</a>
          </h6>
<p>
            This customization point needs to be implemented for any strings that
            use a type other than <code class="computeroutput"><span class="keyword">char</span></code>
            or `wchar_t to store character data.
          </p>
<h6>
<a name="spirit.advanced.customize.string_traits.is_char.h8"></a>
            <span class="phrase