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<title>libstdc++: std::locale::id Class Reference</title>
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<a href="#pub-methods">Public Member Functions</a> |
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<a href="a05824.html">List of all members</a> </div>
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<div class="title">std::locale::id Class Reference<div class="ingroups"><a class="el" href="a01492.html">Locales</a></div></div> </div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a05733d8d1ad35f4fa4feef3313b1bce3"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a05827.html#a05733d8d1ad35f4fa4feef3313b1bce3">id</a> ()</td></tr>
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<tr class="memitem:a12667b877cc719aeed9113c0d5b21427"><td class="memItemLeft" align="right" valign="top"><a id="a12667b877cc719aeed9113c0d5b21427"></a>
size_t </td><td class="memItemRight" valign="bottom"><b>_M_id</b> () const throw ()</td></tr>
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Friends</h2></td></tr>
<tr class="memitem:ad5bc3cddb6bb375329682cb211ba0441"><td class="memTemplParams" colspan="2">template<typename _Facet > </td></tr>
<tr class="memitem:ad5bc3cddb6bb375329682cb211ba0441"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a05827.html#ad5bc3cddb6bb375329682cb211ba0441">has_facet</a> (const <a class="el" href="a05819.html">locale</a> &) throw ()</td></tr>
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class </td><td class="memItemRight" valign="bottom"><b>locale</b></td></tr>
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class </td><td class="memItemRight" valign="bottom"><b>locale::_Impl</b></td></tr>
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<tr class="memitem:ac42c07b39caa9133862dd851c3fa2c7d"><td class="memTemplParams" colspan="2">template<typename _Facet > </td></tr>
<tr class="memitem:ac42c07b39caa9133862dd851c3fa2c7d"><td class="memTemplItemLeft" align="right" valign="top">const _Facet & </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="a05827.html#ac42c07b39caa9133862dd851c3fa2c7d">use_facet</a> (const <a class="el" href="a05819.html">locale</a> &)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Facet ID class.</p>
<p>The ID class provides facets with an index used to identify them. Every facet class must define a public static member locale::id, or be derived from a facet that provides this member, otherwise the facet cannot be used in a locale. The locale::id ensures that each class type gets a unique identifier. </p>
<p class="definition">Definition at line <a class="el" href="a00392_source.html#l00483">483</a> of file <a class="el" href="a00392_source.html">locale_classes.h</a>.</p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="a05733d8d1ad35f4fa4feef3313b1bce3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a05733d8d1ad35f4fa4feef3313b1bce3">◆ </a></span>id()</h2>
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<td class="memname">std::locale::id::id </td>
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<p>Constructor. </p>
<p class="definition">Definition at line <a class="el" href="a00392_source.html#l00514">514</a> of file <a class="el" href="a00392_source.html">locale_classes.h</a>.</p>
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<h2 class="groupheader">Friends And Related Function Documentation</h2>
<a id="ad5bc3cddb6bb375329682cb211ba0441"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad5bc3cddb6bb375329682cb211ba0441">◆ </a></span>has_facet</h2>
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template<typename _Facet > </div>
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<td class="memname">bool has_facet </td>
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<td class="paramname"></td><td>)</td>
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<td align="right">throw </td><td>(</td><td colspan="2"></td>
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<p>Test for the presence of a facet.has_facet tests the locale argument for the presence of the facet type provided as the template parameter. Facets derived from the facet parameter will also return true. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">_Facet</td><td>The facet type to test the presence of. </td></tr>
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</dd>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__loc</td><td>The locale to test. </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>true if <code>__loc</code> contains a facet of type _Facet, else false. </dd></dl>
<p class="definition">Definition at line <a class="el" href="a00395_source.html#l00104">104</a> of file <a class="el" href="a00395_source.html">locale_classes.tcc</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ac42c07b39caa9133862dd851c3fa2c7d">◆ </a></span>use_facet</h2>
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template<typename _Facet > </div>
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<td class="memname">const _Facet& use_facet </td>
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<p>Return a facet.use_facet looks for and returns a reference to a facet of type Facet where Facet is the template parameter. If has_facet(locale) is true, there is a suitable facet to return. It throws std::bad_cast if the locale doesn't contain a facet of type Facet. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
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<tr><td class="paramname">_Facet</td><td>The facet type to access. </td></tr>
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</dd>
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<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__loc</td><td>The locale to use. </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>Reference to facet of type Facet. </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
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<tr><td class="paramname">std::bad_cast</td><td>if <code>__loc</code> doesn't contain a facet of type _Facet. </td></tr>
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</dd>
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<p class="definition">Definition at line <a class="el" href="a00395_source.html#l00132">132</a> of file <a class="el" href="a00395_source.html">locale_classes.tcc</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="a00392_source.html">locale_classes.h</a></li>
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