98 lines
5.5 KiB
HTML
98 lines
5.5 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::locale::facet</title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_locale_locale_facet skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::locale::</span>facet</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-locale.html">locale</a>‎ | <a href="cpp-locale-locale.html">locale</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<table class="t-dcl-begin">
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<tbody>
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<td>
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<div>定义于头文件 <code><a href="cpp-header-locale.html"><locale></a></code></div>
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</td>
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<td></td>
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<td></td>
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</tr>
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<tr class="t-dcl">
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<td class="t-dcl-nopad">
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> locale<span class="sy4">::</span><span class="me2">facet</span><span class="sy4">;</span></span></div>
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<p><span class="t-lc"><strong class="selflink">std::locale::facet</strong></span> 是平面的基类。它提供共用基类，使得 locale 能存储指向其所实装的平面的指针于单个有下标容器中，而且它抽象对于平面引用计数的支持。添加平面到 locale 时， locale 自增平面中的引用计数（通过实现特定的机制）。凡在析构或修改 locale 时，它自减每个它不再实装的平面中的引用计数。平面的引用计数变为零时， locale 进行 <span class="t-c"><span class="mw-geshi cpp source-cpp">delete <span class="kw1">static_cast</span><span class="sy1"><</span>std<span class="sy4">::</span><span class="me2">locale</span><span class="sy4">::</span><span class="me2">facet</span><span class="sy2">*</span><span class="sy1">></span><span class="br0">(</span>f<span class="br0">)</span></span></span> ，其中 <code>f</code> 是指向平面的指针。</p>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">成员函数</span></h3>
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<table class="t-dsc-begin">
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><a href="cpp-locale-locale-facet-facet.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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</div>
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</td>
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<td>构造带指定引用计数的新 facet<br />
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<span class="t-mark">(受保护成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><span class="t-lines"><span>operator=</span></span></div>
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</div>
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</td>
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<td>复制赋值运算符被删除<br />
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<span class="t-mark">(受保护成员函数)</span></td>
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</tr>
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<tr class="t-dsc">
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
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<div><span class="t-lines"><span>(析构函数)</span></span></div>
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<div><span class="t-lines"><span><span class="t-cmark">[虚]</span></span></span></div>
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</div>
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</td>
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<td>析构函数为受保护虚函数<br />
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<span class="t-mark">(虚受保护成员函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
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<tr>
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<td class="mbox-empty-cell"></td>
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<td class="mbox-text" style="">本节未完成<br />
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原因：暂无示例</td>
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</table>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-locale-locale-id.html"><span class="t-lines"><span>id</span></span></a></div>
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</div>
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</td>
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<td>平面索引类型：每个平面类必须声明或继承此类型的公开静态成员<br />
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<span class="t-mark">(类)</span></td>
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</tr>
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</table>
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</html>
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