    other Spirit components. It determines whether a supplied type can be treated
          as a string.
        </p>
<h6>
<a name="spirit.advanced.customize.is_string.h1"></a>
          <span class="phrase"><a name="spirit.advanced.customize.is_string.module_headers"></a></span><a class="link" href="is_string.html#spirit.advanced.customize.is_string.module_headers">Module Headers</a>
        </h6>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span 