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<div class="refentry">
<a name="boost.xpressive.null_regex_traits"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template null_regex_traits</span></h2>
<p>boost::xpressive::null_regex_traits &#8212; stub <a class="link" href="regex_traits.html" title="Struct template regex_traits">regex_traits</a> for non-char data </p>
</div>
<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../xpressive/reference.html#header.boost.xpressive.xpressive_fwd_hpp" title="Header &lt;boost/xpressive/xpressive_fwd.hpp&gt;">boost/xpressive/xpressive_fwd.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Elem<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a> <span class="special">{</span>
  <span class="comment">// <a class="link" href="null_regex_traits.html#boost.xpressive.null_regex_traitsconstruct-copy-destruct">construct/copy/destruct</a></span>
  <a class="link" href="null_regex_traits.html#idm45506839016064-bb"><span class="identifier">null_regex_traits</span></a><span class="special">(</span><span class="identifier">locale_type</span> <span class="special">=</span> <span class="identifier">locale_type</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="null_regex_traits.html#idm45506839028048-bb">public member functions</a></span>
  <span class="keyword">bool</span> <a class="link" href="null_regex_traits.html#idm45506839027488-bb"><span class="keyword">operator</span><span class="special">==</span></a><span class="special">(</span><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a><span class="special">&lt;</span> <span class="identifier">char_type</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="keyword">bool</span> <a class="link" href="null_regex_traits.html#idm45506839023536-bb"><span class="keyword">operator</span><span class="special">!=</span></a><span class="special">(</span><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a><span class="special">&lt;</span> <span class="identifier">char_type</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="identifier">char_type</span> <a class="link" href="null_regex_traits.html#idm45506839019584-bb"><span class="identifier">widen</span></a><span class="special">(</span><span class="keyword">char</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="null_regex_traits.html#idm45506839013648-bb">public static functions</a></span>
  <span class="keyword">static</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <a class="link" href="null_regex_traits.html#idm45506839013088-bb"><span class="identifier">hash</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">char_type</span> <a class="link" href="null_regex_traits.html#idm45506839009664-bb"><span class="identifier">translate</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">char_type</span> <a class="link" href="null_regex_traits.html#idm45506839006320-bb"><span class="identifier">translate_nocase</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="null_regex_traits.html#idm45506839002976-bb"><span class="identifier">in_range</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">,</span> <span class="identifier">char_type</span><span class="special">,</span> <span class="identifier">char_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="null_regex_traits.html#idm45506838997328-bb"><span class="identifier">in_range_nocase</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">,</span> <span class="identifier">char_type</span><span class="special">,</span> <span class="identifier">char_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> <span class="keyword">static</span> <span class="identifier">string_type</span> <a class="link" href="null_regex_traits.html#idm45506838990320-bb"><span class="identifier">transform</span></a><span class="special">(</span><span class="identifier">FwdIter</span><span class="special">,</span> <span class="identifier">FwdIter</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
    <span class="keyword">static</span> <span class="identifier">string_type</span> <a class="link" href="null_regex_traits.html#idm45506838985648-bb"><span class="identifier">transform_primary</span></a><span class="special">(</span><span class="identifier">FwdIter</span><span class="special">,</span> <span class="identifier">FwdIter</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
    <span class="keyword">static</span> <span class="identifier">string_type</span> <a class="link" href="null_regex_traits.html#idm45506838980928-bb"><span class="identifier">lookup_collatename</span></a><span class="special">(</span><span class="identifier">FwdIter</span><span class="special">,</span> <span class="identifier">FwdIter</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
    <span class="keyword">static</span> <span class="identifier">char_class_type</span> <a class="link" href="null_regex_traits.html#idm45506838976240-bb"><span class="identifier">lookup_classname</span></a><span class="special">(</span><span class="identifier">FwdIter</span><span class="special">,</span> <span class="identifier">FwdIter</span><span class="special">,</span> <span class="keyword">bool</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">bool</span> <a class="link" href="null_regex_traits.html#idm45506838969024-bb"><span class="identifier">isctype</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">,</span> <span class="identifier">char_class_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="keyword">int</span> <a class="link" href="null_regex_traits.html#idm45506838963792-bb"><span class="identifier">value</span></a><span class="special">(</span><span class="identifier">char_type</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">locale_type</span> <a class="link" href="null_regex_traits.html#idm45506838958560-bb"><span class="identifier">imbue</span></a><span class="special">(</span><span class="identifier">locale_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">static</span> <span class="identifier">locale_type</span> <a class="link" href="null_regex_traits.html#idm45506838955216-bb"><span class="identifier">getloc</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm45555014410800"></a><h2>Description</h2>
<div class="refsect2">
<a name="idm45555014410384"></a><h3>
<a name="boost.xpressive.null_regex_traitsconstruct-copy-destruct"></a><code class="computeroutput">null_regex_traits</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><a name="idm45506839016064-bb"></a><span class="identifier">null_regex_traits</span><span class="special">(</span><span class="identifier">locale_type</span> <span class="special">=</span> <span class="identifier">locale_type</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="special">;</span></pre>
<p>Initialize a <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> object. </p>
</li></ol></div>
</div>
<div class="refsect2">
<a name="idm45555014399776"></a><h3>
<a name="idm45506839028048-bb"></a><code class="computeroutput">null_regex_traits</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45506839027488-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a><span class="special">&lt;</span> <span class="identifier">char_type</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Checks two <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> objects for equality</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>true. </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">bool</span> <a name="idm45506839023536-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a><span class="special">&lt;</span> <span class="identifier">char_type</span> <span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span> that<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Checks two <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> objects for inequality</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>false. </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="identifier">char_type</span> <a name="idm45506839019584-bb"></a><span class="identifier">widen</span><span class="special">(</span><span class="keyword">char</span> ch<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Convert a char to a Elem</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The source character. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>Elem(ch). </p></td>
</tr>
</tbody>
</table></div>
</li>
</ol></div>
</div>
<div class="refsect2">
<a name="idm45555014361888"></a><h3>
<a name="idm45506839013648-bb"></a><code class="computeroutput">null_regex_traits</code> public static functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <a name="idm45506839013088-bb"></a><span class="identifier">hash</span><span class="special">(</span><span class="identifier">char_type</span> ch<span class="special">)</span><span class="special">;</span></pre>
<p>Returns a hash value for a Elem in the range [0, UCHAR_MAX]</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The source character. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>a value between 0 and UCHAR_MAX, inclusive. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">char_type</span> <a name="idm45506839009664-bb"></a><span class="identifier">translate</span><span class="special">(</span><span class="identifier">char_type</span> ch<span class="special">)</span><span class="special">;</span></pre>
<p>No-op</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The source character. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>ch </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">char_type</span> <a name="idm45506839006320-bb"></a><span class="identifier">translate_nocase</span><span class="special">(</span><span class="identifier">char_type</span> ch<span class="special">)</span><span class="special">;</span></pre>
<p>No-op</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The source character. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>ch </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="idm45506839002976-bb"></a><span class="identifier">in_range</span><span class="special">(</span><span class="identifier">char_type</span> first<span class="special">,</span> <span class="identifier">char_type</span> last<span class="special">,</span> <span class="identifier">char_type</span> ch<span class="special">)</span><span class="special">;</span></pre>
<p>Checks to see if a character is within a character range.</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The source character. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">first</code></span></p></td>
<td><p>The bottom of the range, inclusive. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">last</code></span></p></td>
<td><p>The top of the range, inclusive. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>first &lt;= ch &amp;&amp; ch &lt;= last. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="idm45506838997328-bb"></a><span class="identifier">in_range_nocase</span><span class="special">(</span><span class="identifier">char_type</span> first<span class="special">,</span> <span class="identifier">char_type</span> last<span class="special">,</span> <span class="identifier">char_type</span> ch<span class="special">)</span><span class="special">;</span></pre>
<p>Checks to see if a character is within a character range.</p>
<p>

</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>Since the <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> does not do case-folding, this function is equivalent to in_range(). </p></td></tr>
</table></div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The source character. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">first</code></span></p></td>
<td><p>The bottom of the range, inclusive. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">last</code></span></p></td>
<td><p>The top of the range, inclusive. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>first &lt;= ch &amp;&amp; ch &lt;= last. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
  <span class="keyword">static</span> <span class="identifier">string_type</span> <a name="idm45506838990320-bb"></a><span class="identifier">transform</span><span class="special">(</span><span class="identifier">FwdIter</span> begin<span class="special">,</span> <span class="identifier">FwdIter</span> end<span class="special">)</span><span class="special">;</span></pre>
<p>Returns a sort key for the character sequence designated by the iterator range [F1, F2) such that if the character sequence [G1, G2) sorts before the character sequence [H1, H2) then v.transform(G1, G2) &lt; v.transform(H1, H2).</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>Not currently used </p></td></tr>
</table></div>
<p>
</p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
  <span class="keyword">static</span> <span class="identifier">string_type</span> <a name="idm45506838985648-bb"></a><span class="identifier">transform_primary</span><span class="special">(</span><span class="identifier">FwdIter</span> begin<span class="special">,</span> <span class="identifier">FwdIter</span> end<span class="special">)</span><span class="special">;</span></pre>
<p>Returns a sort key for the character sequence designated by the iterator range [F1, F2) such that if the character sequence [G1, G2) sorts before the character sequence [H1, H2) when character case is not considered then v.transform_primary(G1, G2) &lt; v.transform_primary(H1, H2).</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>Not currently used </p></td></tr>
</table></div>
<p>
</p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
  <span class="keyword">static</span> <span class="identifier">string_type</span> <a name="idm45506838980928-bb"></a><span class="identifier">lookup_collatename</span><span class="special">(</span><span class="identifier">FwdIter</span> begin<span class="special">,</span> <span class="identifier">FwdIter</span> end<span class="special">)</span><span class="special">;</span></pre>
<p>Returns a sequence of characters that represents the collating element consisting of the character sequence designated by the iterator range [F1, F2). Returns an empty string if the character sequence is not a valid collating element.</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>Not currently used </p></td></tr>
</table></div>
<p>
</p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
  <span class="keyword">static</span> <span class="identifier">char_class_type</span> 
  <a name="idm45506838976240-bb"></a><span class="identifier">lookup_classname</span><span class="special">(</span><span class="identifier">FwdIter</span> begin<span class="special">,</span> <span class="identifier">FwdIter</span> end<span class="special">,</span> <span class="keyword">bool</span> icase<span class="special">)</span><span class="special">;</span></pre>
<p>The <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> does not have character classifications, so lookup_classname() is unused.</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">begin</code></span></p></td>
<td><p>not used </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>not used </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">icase</code></span></p></td>
<td><p>not used </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>static_cast&lt;char_class_type&gt;(0) </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">bool</span> <a name="idm45506838969024-bb"></a><span class="identifier">isctype</span><span class="special">(</span><span class="identifier">char_type</span> ch<span class="special">,</span> <span class="identifier">char_class_type</span> mask<span class="special">)</span><span class="special">;</span></pre>
<p>The <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> does not have character classifications, so isctype() is unused.</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>not used </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">mask</code></span></p></td>
<td><p>not used </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>false </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">int</span> <a name="idm45506838963792-bb"></a><span class="identifier">value</span><span class="special">(</span><span class="identifier">char_type</span> ch<span class="special">,</span> <span class="keyword">int</span> radix<span class="special">)</span><span class="special">;</span></pre>
<p>The <code class="computeroutput"><a class="link" href="null_regex_traits.html" title="Struct template null_regex_traits">null_regex_traits</a></code> recognizes no elements as digits, so value() is unused.</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>not used </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">radix</code></span></p></td>
<td><p>not used </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>-1 </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">locale_type</span> <a name="idm45506838958560-bb"></a><span class="identifier">imbue</span><span class="special">(</span><span class="identifier">locale_type</span> loc<span class="special">)</span><span class="special">;</span></pre>
<p>Not used</p>
<p>

</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">loc</code></span></p></td>
<td><p>not used </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>loc </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">static</span> <span class="identifier">locale_type</span> <a name="idm45506838955216-bb"></a><span class="identifier">getloc</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
<p>Returns locale_type().</p>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist compact">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>locale_type() </p></td>
</tr></tbody>
</table></div>
</li>
</ol></div>
</div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2007 Eric Niebler<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
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