152 lines
7.9 KiB
HTML
152 lines
7.9 KiB
HTML
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<title>std::chrono::year_month_day</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_chrono_year_month_day skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::chrono::</span>year_month_day</h1>
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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>定义于头文件 <code><a href="cpp-header-chrono.html"><chrono></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">class</span> year_month_day<span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<p>类 <code>year_month_day</code> 表示为特定的年月日。它是基于域的时间点，其解析为 <span class="t-lc">std::chrono::days</span> 。它直接支持面向 <span class="t-lc">std::chrono::years</span> 与 <span class="t-lc">std::chrono::months</span> 的算术。与 <span class="t-lc">std::chrono::sys_days</span> 间的双向隐式转换等效地允许进行面向 <span class="t-lc">std::chrono::days</span> 的算术。</p>
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<p><code>year_month_day</code> 是<a href="cpp-named_req-TriviallyCopyable.html"><span style="font-style:italic">可平凡复制</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(TriviallyCopyable)</span></a> 的<a href="cpp-named_req-StandardLayoutType.html"><span style="font-style:italic">标准布局类型</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(StandardLayoutType)</span></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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<div><a href="cpp-chrono-year_month_day-year_month_day.html"><span class="t-lines"><span>(构造函数)</span></span></a></div>
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<td>构造 <code>year_month_day</code><br />
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<span class="t-mark">(公开成员函数)</span></td>
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<div><a href="cpp-chrono-year_month_day-operator_arith.html"><span class="t-lines"><span>operator+=</span><span>operator-=</span></span></a></div>
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</td>
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<td>以一定量的 <code>months</code> 或 <code>years</code> 为程度修改时间点<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<div><a href="cpp-chrono-year_month_day-accessors.html"><span class="t-lines"><span>year</span><span>month</span><span>day</span></span></a></div>
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<td>访问此对象中存储的 <code>year</code> 、 <code>month</code> 和 <code>day</code><br />
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<span class="t-mark">(公开成员函数)</span></td>
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<div><a href="cpp-chrono-year_month_day-operator_days.html"><span class="t-lines"><span>operator sys_days</span><span>operator local_days</span></span></a></div>
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<td>转换到 <span class="t-lc"><a href="cpp-chrono-time_point.html">std::chrono::time_point</a></span><br />
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<span class="t-mark">(公开成员函数)</span></td>
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<div><a href="cpp-chrono-year_month_day-ok.html"><span class="t-lines"><span>ok</span></span></a></div>
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<td>检查 <code>year_month_day</code> 是否表示合法的日期<br />
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<span class="t-mark">(公开成员函数)</span></td>
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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><a href="cpp-chrono-year_month_day-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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<td>比较二个 <code>year_month_day</code> 值<br />
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<span class="t-mark">(函数)</span></td>
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<div><a href="cpp-chrono-year_month_day-operator_arith_2.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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<td>将 <code>year_month_day</code> 与一定量的年数或月数相加或相减<br />
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<span class="t-mark">(函数)</span></td>
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<div><a href="cpp-chrono-year_month_day-operator_ltlt.html"><span class="t-lines"><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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<td>输出 <code>year_month_day</code> 到流中<br />
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<span class="t-mark">(函数模板)</span></td>
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<div><a href="cpp-chrono-year_month_day-from_stream.html"><span class="t-lines"><span>from_stream</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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<td>按照给定的格式从流分析 <code>year_month_day</code><br />
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<span class="t-mark">(函数模板)</span></td>
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<h3><span class="mw-headline" id=".E8.BE.85.E5.8A.A9.E7.B1.BB">辅助类</span></h3>
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<div><a href="cpp-chrono-year_month_day-formatter.html"><span class="t-lines"><span>std::formatter<span class="t-dsc-small"><std::chrono::year_month_day></span></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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<td><span class="t-lc">std::formatter</span> 的特化，按照提供的格式格式化 <code>year_month_day</code><br />
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<span class="t-mark">(类模板特化)</span></td>
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