110 lines
6.8 KiB
HTML
110 lines
6.8 KiB
HTML
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<title>std::chrono::time_point<Clock,Duration>::operator++, std::chrono::time_point<Clock,Duration>::operator--</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::chrono::time_point<Clock,Duration>::</span>operator++, <span style="font-size:0.7em; line-height:130%">std::chrono::time_point<Clock,Duration>::</span>operator--</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-time_point.html">time point</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> time_point<span class="sy3">&</span> operator<span class="sy2">++</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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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="kw4">constexpr</span> time_point operator<span class="sy2">++</span><span class="br0">(</span><span class="kw4">int</span><span class="br0">)</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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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> time_point<span class="sy3">&</span> operator<span class="sy2">--</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</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="kw4">constexpr</span> time_point operator<span class="sy2">--</span><span class="br0">(</span><span class="kw4">int</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(4)</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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<td></td>
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<td></td>
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<p>以 <code>duration</code> 的一个计次修改时间点 <code>*this</code> 。</p>
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<p>若 <code>d_</code> 为此 <code>time_point</code> 对象保有时长（即自纪元起的时间）的成员变量，则</p>
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<div class="t-li1"><span class="t-li">1)</span> 等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">++</span>d_<span class="sy4">;</span> <span class="kw1">return</span> <span class="sy2">*</span>this<span class="sy4">;</span></span></span></div>
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<div class="t-li1"><span class="t-li">2)</span> 等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">return</span> time_point<span class="br0">(</span>d_<span class="sy2">++</span><span class="br0">)</span></span></span></div>
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<div class="t-li1"><span class="t-li">3)</span> 等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">--</span>d_<span class="sy4">;</span> <span class="kw1">return</span> <span class="sy2">*</span>this<span class="sy4">;</span></span></span></div>
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<div class="t-li1"><span class="t-li">4)</span> 等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">return</span> time_point<span class="br0">(</span>d_<span class="sy2">--</span><span class="br0">)</span><span class="sy4">;</span></span></span></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<p>（无）</p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<div class="t-li1"><span class="t-li">1,3)</span> 到修改后的此 <code>time_point</code> 的引用</div>
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<div class="t-li1"><span class="t-li">2,4)</span> 进行修改前的 <code>time_point</code> 的副本</div>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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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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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-chrono-duration-operator_arith2.html"><span class="t-lines"><span>operator++</span><span>operator++<span class="t-dsc-small">(int)</span></span><span>operator--</span><span>operator--<span class="t-dsc-small">(int)</span></span></span></a></div>
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</div>
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</td>
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<td>递增或递减滴答计数<br />
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<span class="t-mark">(<code>std::chrono::duration<Rep,Period></code> 的公开成员函数)</span></td>
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<div><a href="cpp-chrono-time_point-operator_arith.html"><span class="t-lines"><span>operator+=</span><span>operator-=</span></span></a></div>
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</div>
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</td>
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<td>以给定的 duration 修改 time_point<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-time_point-operator_arith2.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-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>实施涉及时间点的加法和减法运算<br />
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<span class="t-mark">(函数模板)</span></td>
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