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<title>Struct template cpp_regex_traits</title>
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<div class="refentry" title="Struct template cpp_regex_traits">
<a name="boost.xpressive.cpp_regex_traits"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2><span class="refentrytitle">Struct template cpp_regex_traits</span></h2>
<p>boost::xpressive::cpp_regex_traits — Encapsaulates a std::locale for use by the basic_regex<> class template. </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="emphasis"><em>// In header: <<a class="link" href="../../xpressive/reference.html#header.boost.xpressive.traits.cpp_regex_traits_hpp" title="Header <boost/xpressive/traits/cpp_regex_traits.hpp>">boost/xpressive/traits/cpp_regex_traits.hpp</a>>
</em></span><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> Char>
<span class="bold"><strong>struct</strong></span> <a class="link" href="cpp_regex_traits.html" title="Struct template cpp_regex_traits">cpp_regex_traits</a> {
<span class="emphasis"><em>// types</em></span>
<span class="bold"><strong>typedef</strong></span> Char <a name="boost.xpressive.cpp_regex_traits.char_type"></a>char_type;
<span class="bold"><strong>typedef</strong></span> std::basic_string< char_type > <a name="boost.xpressive.cpp_regex_traits.string_type"></a>string_type;
<span class="bold"><strong>typedef</strong></span> std::locale <a name="boost.xpressive.cpp_regex_traits.locale_type"></a>locale_type;
<span class="bold"><strong>typedef</strong></span> <span class="emphasis"><em>unspecified</em></span> <a name="boost.xpressive.cpp_regex_traits.char_class_type"></a>char_class_type;
<span class="bold"><strong>typedef</strong></span> <a class="link" href="regex_traits_version_2_tag.html" title="Struct regex_traits_version_2_tag">regex_traits_version_2_tag</a> <a name="boost.xpressive.cpp_regex_traits.version_tag"></a>version_tag;
<span class="bold"><strong>typedef</strong></span> <span class="emphasis"><em>unspecified</em></span> <a name="boost.xpressive.cpp_regex_traits.base_type"></a>base_type;
<span class="emphasis"><em>// <a class="link" href="cpp_regex_traits.html#boost.xpressive.cpp_regex_traitsconstruct-copy-destruct">construct/copy/destruct</a></em></span>
<a class="link" href="cpp_regex_traits.html#id1494789-bb">cpp_regex_traits</a>(locale_type <span class="bold"><strong>const</strong></span> & = locale_type());
<span class="emphasis"><em>// <a class="link" href="cpp_regex_traits.html#id1494208-bb">public member functions</a></em></span>
<span class="type"><span class="bold"><strong>bool</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494211-bb"><span class="bold"><strong>operator</strong></span>==</a>(<a class="link" href="cpp_regex_traits.html" title="Struct template cpp_regex_traits">cpp_regex_traits</a>< char_type > <span class="bold"><strong>const</strong></span> &) <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>bool</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494238-bb"><span class="bold"><strong>operator</strong></span>!=</a>(<a class="link" href="cpp_regex_traits.html" title="Struct template cpp_regex_traits">cpp_regex_traits</a>< char_type > <span class="bold"><strong>const</strong></span> &) <span class="bold"><strong>const</strong></span>;
<span class="type">char_type</span> <a class="link" href="cpp_regex_traits.html#id1494265-bb">widen</a>(<span class="bold"><strong>char</strong></span>) <span class="bold"><strong>const</strong></span>;
<span class="type">char_type</span> <a class="link" href="cpp_regex_traits.html#id1494293-bb">translate_nocase</a>(char_type) <span class="bold"><strong>const</strong></span>;
<span class="type">char_type</span> <a class="link" href="cpp_regex_traits.html#id1494321-bb">tolower</a>(char_type) <span class="bold"><strong>const</strong></span>;
<span class="type">char_type</span> <a class="link" href="cpp_regex_traits.html#id1494349-bb">toupper</a>(char_type) <span class="bold"><strong>const</strong></span>;
<span class="type">string_type</span> <a class="link" href="cpp_regex_traits.html#id1494377-bb">fold_case</a>(char_type) <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>bool</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494408-bb">in_range_nocase</a>(char_type, char_type, char_type) <span class="bold"><strong>const</strong></span>;
<span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> FwdIter>
<span class="type">string_type</span> <a class="link" href="cpp_regex_traits.html#id1494462-bb">transform_primary</a>(FwdIter, FwdIter) <span class="bold"><strong>const</strong></span>;
<span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> FwdIter>
<span class="type">string_type</span> <a class="link" href="cpp_regex_traits.html#id1494502-bb">lookup_collatename</a>(FwdIter, FwdIter) <span class="bold"><strong>const</strong></span>;
<span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> FwdIter>
<span class="type">char_class_type</span> <a class="link" href="cpp_regex_traits.html#id1494542-bb">lookup_classname</a>(FwdIter, FwdIter, <span class="bold"><strong>bool</strong></span>) <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>bool</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494600-bb">isctype</a>(char_type, char_class_type) <span class="bold"><strong>const</strong></span>;
<span class="type"><span class="bold"><strong>int</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494643-bb">value</a>(char_type, <span class="bold"><strong>int</strong></span>) <span class="bold"><strong>const</strong></span>;
<span class="type">locale_type</span> <a class="link" href="cpp_regex_traits.html#id1494688-bb">imbue</a>(locale_type) ;
<span class="type">locale_type</span> <a class="link" href="cpp_regex_traits.html#id1494714-bb">getloc</a>() <span class="bold"><strong>const</strong></span>;
<span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494726-bb">hash</a>(<span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span>) ;
<span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494742-bb">hash</a>(<span class="bold"><strong>char</strong></span>) ;
<span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494758-bb">hash</a>(<span class="bold"><strong>signed</strong></span> <span class="bold"><strong>char</strong></span>) ;
<span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494773-bb">hash</a>(<span class="bold"><strong>wchar_t</strong></span>) ;
<span class="emphasis"><em>// <a class="link" href="cpp_regex_traits.html#id1494804-bb">public static functions</a></em></span>
<span class="type"><span class="bold"><strong>static</strong></span> <span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494807-bb">hash</a>(char_type) ;
<span class="type"><span class="bold"><strong>static</strong></span> char_type</span> <a class="link" href="cpp_regex_traits.html#id1494835-bb">translate</a>(char_type) ;
<span class="type"><span class="bold"><strong>static</strong></span> <span class="bold"><strong>bool</strong></span></span> <a class="link" href="cpp_regex_traits.html#id1494862-bb">in_range</a>(char_type, char_type, char_type) ;
};</pre></div>
<div class="refsect1" title="Description">
<a name="id2134676"></a><h2>Description</h2>
<div class="refsect2" title="cpp_regex_traits public construct/copy/destruct">
<a name="id2134680"></a><h3>
<a name="boost.xpressive.cpp_regex_traitsconstruct-copy-destruct"></a><code class="computeroutput">cpp_regex_traits</code>
public
construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
<pre class="literallayout"><a name="id1494789-bb"></a>cpp_regex_traits(locale_type <span class="bold"><strong>const</strong></span> & loc = locale_type());</pre>
<p>Initialize a cpp_regex_traits object to use the specified std::locale, or the global std::locale if none is specified. </p>
</li></ol></div>
</div>
<div class="refsect2" title="cpp_regex_traits public member functions">
<a name="id2134724"></a><h3>
<a name="id1494208-bb"></a><code class="computeroutput">cpp_regex_traits</code> public member functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="type"><span class="bold"><strong>bool</strong></span></span> <a name="id1494211-bb"></a><span class="bold"><strong>operator</strong></span>==(<a class="link" href="cpp_regex_traits.html" title="Struct template cpp_regex_traits">cpp_regex_traits</a>< char_type > <span class="bold"><strong>const</strong></span> & that) <span class="bold"><strong>const</strong></span>;</pre>
<p>Checks two cpp_regex_traits objects for equality</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>this->getloc() == that.getloc(). </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type"><span class="bold"><strong>bool</strong></span></span> <a name="id1494238-bb"></a><span class="bold"><strong>operator</strong></span>!=(<a class="link" href="cpp_regex_traits.html" title="Struct template cpp_regex_traits">cpp_regex_traits</a>< char_type > <span class="bold"><strong>const</strong></span> & that) <span class="bold"><strong>const</strong></span>;</pre>
<p>Checks two cpp_regex_traits objects for inequality</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>this->getloc() != that.getloc(). </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">char_type</span> <a name="id1494265-bb"></a>widen(<span class="bold"><strong>char</strong></span> ch) <span class="bold"><strong>const</strong></span>;</pre>
<p>Convert a char to a Char</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>std::use_facet<std::ctype<char_type> >(this->getloc()).widen(ch). </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">char_type</span> <a name="id1494293-bb"></a>translate_nocase(char_type ch) <span class="bold"><strong>const</strong></span>;</pre>
<p>Converts a character to lower-case using the internally-stored std::locale.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>std::tolower(ch, this->getloc()). </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">char_type</span> <a name="id1494321-bb"></a>tolower(char_type ch) <span class="bold"><strong>const</strong></span>;</pre>
<p>Converts a character to lower-case using the internally-stored std::locale.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>std::tolower(ch, this->getloc()). </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">char_type</span> <a name="id1494349-bb"></a>toupper(char_type ch) <span class="bold"><strong>const</strong></span>;</pre>
<p>Converts a character to upper-case using the internally-stored std::locale.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>std::toupper(ch, this->getloc()). </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">string_type</span> <a name="id1494377-bb"></a>fold_case(char_type ch) <span class="bold"><strong>const</strong></span>;</pre>
<p>Returns a string_type containing all the characters that compare equal disregrarding case to the one passed in. This function can only be called if has_fold_case<cpp_regex_traits<Char> >value is true.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>string_type containing all chars which are equal to ch when disregarding case </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type"><span class="bold"><strong>bool</strong></span></span> <a name="id1494408-bb"></a>in_range_nocase(char_type first, char_type last, char_type ch) <span class="bold"><strong>const</strong></span>;</pre>
<p>Checks to see if a character is within a character range, irregardless of case.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>in_range(first, last, ch) || in_range(first, last, tolower(ch, this->getloc())) || in_range(first, last, toupper(ch, this->getloc())) </p></td>
</tr>
<tr>
<td><p><span class="term">Notes:</span></p></td>
<td><p>The default implementation doesn't do proper Unicode case folding, but this is the best we can do with the standard ctype facet. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> FwdIter>
<span class="type">string_type</span> <a name="id1494462-bb"></a>transform_primary(FwdIter begin, FwdIter end) <span class="bold"><strong>const</strong></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) < v.transform_primary(H1, H2).</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term">Notes:</span></p></td>
<td><p>Not currently used </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> FwdIter>
<span class="type">string_type</span> <a name="id1494502-bb"></a>lookup_collatename(FwdIter begin, FwdIter end) <span class="bold"><strong>const</strong></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>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term">Notes:</span></p></td>
<td><p>Not currently used </p></td>
</tr></tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="bold"><strong>template</strong></span><<span class="bold"><strong>typename</strong></span> FwdIter>
<span class="type">char_class_type</span>
<a name="id1494542-bb"></a>lookup_classname(FwdIter begin, FwdIter end, <span class="bold"><strong>bool</strong></span> icase) <span class="bold"><strong>const</strong></span>;</pre>
<p>For the character class name represented by the specified character sequence, return the corresponding bitmask representation.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">begin</code></span></p></td>
<td><p>A forward iterator to the start of the character sequence representing the name of the character class. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">end</code></span></p></td>
<td><p>The end of the character sequence. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">icase</code></span></p></td>
<td><p>Specifies whether the returned bitmask should represent the case-insensitive version of the character class. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>A bitmask representing the character class. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type"><span class="bold"><strong>bool</strong></span></span> <a name="id1494600-bb"></a>isctype(char_type ch, char_class_type mask) <span class="bold"><strong>const</strong></span>;</pre>
<p>Tests a character against a character class bitmask.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The character to test. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">mask</code></span></p></td>
<td><p>The character class bitmask against which to test. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p>mask is a bitmask returned by lookup_classname, or is several such masks bit-or'ed together. </p></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>true if the character is a member of any of the specified character classes, false otherwise. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type"><span class="bold"><strong>int</strong></span></span> <a name="id1494643-bb"></a>value(char_type ch, <span class="bold"><strong>int</strong></span> radix) <span class="bold"><strong>const</strong></span>;</pre>
<p>Convert a digit character into the integer it represents.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><code class="computeroutput">ch</code></span></p></td>
<td><p>The digit character. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">radix</code></span></p></td>
<td><p>The radix to use for the conversion. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Requires:</span></p></td>
<td><p>radix is one of 8, 10, or 16. </p></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>-1 if ch is not a digit character, the integer value of the character otherwise. The conversion is performed by imbueing a std::stringstream with this->getloc(); setting the radix to one of oct, hex or dec; inserting ch into the stream; and extracting an int. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">locale_type</span> <a name="id1494688-bb"></a>imbue(locale_type loc) ;</pre>
<p>Imbues *this with loc</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><code class="computeroutput">loc</code></span></p></td>
<td><p>A std::locale. </p></td>
</tr></tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>the previous std::locale used by *this. </p></td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="type">locale_type</span> <a name="id1494714-bb"></a>getloc() <span class="bold"><strong>const</strong></span>;</pre>
<p>Returns the current std::locale used by *this. </p>
</li>
<li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a name="id1494726-bb"></a>hash(<span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span> ch) ;</pre></li>
<li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a name="id1494742-bb"></a>hash(<span class="bold"><strong>char</strong></span> ch) ;</pre></li>
<li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a name="id1494758-bb"></a>hash(<span class="bold"><strong>signed</strong></span> <span class="bold"><strong>char</strong></span> ch) ;</pre></li>
<li class="listitem"><pre class="literallayout"><span class="bold"><strong>template</strong></span><> <span class="type"><span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a name="id1494773-bb"></a>hash(<span class="bold"><strong>wchar_t</strong></span> ch) ;</pre></li>
</ol></div>
</div>
<div class="refsect2" title="cpp_regex_traits public static functions">
<a name="id2135897"></a><h3>
<a name="id1494804-bb"></a><code class="computeroutput">cpp_regex_traits</code> public static functions</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem">
<pre class="literallayout"><span class="type"><span class="bold"><strong>static</strong></span> <span class="bold"><strong>unsigned</strong></span> <span class="bold"><strong>char</strong></span></span> <a name="id1494807-bb"></a>hash(char_type ch) ;</pre>
<p>Returns a hash value for a Char in the range [0, UCHAR_MAX]</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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="type"><span class="bold"><strong>static</strong></span> char_type</span> <a name="id1494835-bb"></a>translate(char_type ch) ;</pre>
<p>No-op</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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="type"><span class="bold"><strong>static</strong></span> <span class="bold"><strong>bool</strong></span></span> <a name="id1494862-bb"></a>in_range(char_type first, char_type last, char_type ch) ;</pre>
<p>Checks to see if a character is within a character range.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">Parameters:</span></p></td>
<td><div class="variablelist"><table border="0">
<col align="left" valign="top">
<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 <= ch && ch <= last. </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 © 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>
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