49 lines
3.8 KiB
HTML
49 lines
3.8 KiB
HTML
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<title>std::chrono::year_month_weekday_last::operator sys_days, std::chrono::year_month_weekday_last::operator local_days</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::chrono::year_month_weekday_last::</span>operator sys_days, <span style="font-size:0.7em; line-height:130%">std::chrono::year_month_weekday_last::</span>operator local_days</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-chrono.html">chrono</a>‎ | <a href="cpp-chrono-year_month_weekday_last.html">year month weekday last</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> operator std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">sys_days</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> <span class="kw4">constexpr</span> operator std<span class="sy4">::</span><span class="me2">chrono</span><span class="sy4">::</span><span class="me2">local_days</span><span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
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<p>将 <code>*this</code> 转换成与此 <code>year_month_weekday_last</code> 表示相同时间点的 <span class="t-lc"><a href="cpp-chrono-time_point.html">std::chrono::time_point</a></span> 。</p>
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<div class="t-li1"><span class="t-li">1)</span> 若 <span class="t-lc">ok()</span> 为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> ，则返回表示该 <span class="t-lc">year()</span> 和 <span class="t-lc">month()</span> 的最后一个 <span class="t-lc">weekday()</span> 的 <code>sys_days</code> 。否则返回值未指定。</div>
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<div class="t-li1"><span class="t-li">2)</span> 同 <span class="t-v">(1)</span> ，但返回 <code>local_days</code> 而非 <code>sys_days</code> 。等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">local_days<span class="br0">(</span>sys_days<span class="br0">(</span><span class="sy2">*</span>this<span class="br0">)</span>.<span class="me1">time_since_epoch</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> 。</div>
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