101 lines
5.2 KiB
HTML
101 lines
5.2 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::chrono::time_zone</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_chrono_time_zone 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::chrono::</span>time_zone</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-chrono.html">chrono</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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<tr class="t-dsc-header">
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<td>
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<div>定义于头文件 <code><a href="cpp-header-chrono.html"><chrono></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 t-since-cxx20">
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<td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> time_zone<span class="sy4">;</span></span></div>
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</td>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<td></td>
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<p>类 <code>time_zone</code> 表示特定地理区域的所有时区转变。</p>
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<p>用户不能构造 <code>time_zone</code> 对象。库实现在初始化时区数据库时创建 <code>time_zone</code> 对象，并提供对这些对象的 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span></span></span> 访问。</p>
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<p><code>time_zone</code> 不可复制，但有默认化的移动构造函数和移动赋值运算符。然而，因为用户只拥有对 <code>time_zone</code> 对象的 <code>const</code> 访问，无法在用户代码中调用这些函数而不引发<a href="cpp-language-ub.html">未定义行为</a>。</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">
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<div><a href="cpp-chrono-time_zone-name.html"><span class="t-lines"><span>name</span></span></a></div>
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</div>
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</td>
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<td>获得此 <code>time_zone</code> 的名称<br />
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<span class="t-mark">(公开成员函数)</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><a href="cpp-chrono-time_zone-get_info.html"><span class="t-lines"><span>get_info</span></span></a></div>
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</div>
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</td>
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<td>获得与 <span class="t-lc">sys_time</span> 或 <span class="t-lc">local_time</span> 关联的信息<br />
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<span class="t-mark">(公开成员函数)</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><a href="cpp-chrono-time_zone-to_sys.html"><span class="t-lines"><span>to_sys</span></span></a></div>
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</div>
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</td>
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<td>将此时区中的 <span class="t-lc">local_time</span> 转换成 <span class="t-lc">sys_time</span><br />
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<span class="t-mark">(公开成员函数)</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><a href="cpp-chrono-time_zone-to_local.html"><span class="t-lines"><span>to_local</span></span></a></div>
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</div>
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</td>
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<td>将 <span class="t-lc">sys_time</span> 转换成此时区中的 <span class="t-lc">local_time</span><br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">非成员函数</span></h3>
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<table class="t-dsc-begin">
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<div class="t-dsc-member-div">
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<div><a href="cpp-chrono-time_zone-operator_cmp.html"><span class="t-lines"><span>operator==</span><span>operator<=></span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
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</div>
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</td>
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<td>比较二个 <code>time_zone</code> 对象<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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</body>
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</html>
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