62 lines
2.9 KiB
HTML
62 lines
2.9 KiB
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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<title>std::atomic_ref<T>::atomic_ref</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_atomic_atomic_ref_atomic_ref skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::atomic_ref<T>::</span>atomic_ref</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-atomic.html">atomic</a>‎ | <a href="cpp-atomic-atomic_ref.html">atomic ref</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> atomic_ref<span class="br0">(</span> T<span class="sy3">&</span> obj <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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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">atomic_ref<span class="br0">(</span> <span class="kw4">const</span> atomic_ref<span class="sy3">&</span> ref <span class="br0">)</span> <span class="kw1">noexcept</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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<p>构造新的 <code>atomic_ref</code> 对象。</p>
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<div class="t-li1"><span class="t-li">1)</span> 构造引用对象 <code>obj</code> 的 <code>atomic_ref</code> 对象。若 <code>obj</code> 未对齐到 <a href="cpp-atomic-atomic_ref-required_alignment.html"><tt>required_alignment</tt></a> 则行为未定义。</div>
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<div class="t-li1"><span class="t-li">2)</span> 构造引用 <code>ref</code> 所引用对象的 <code>atomic_ref</code> 对象。</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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<table class="t-par-begin">
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<tr class="t-par">
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<td>obj</td>
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<td>-</td>
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<td>到对象的引用</td>
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</tr>
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<tr class="t-par">
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<td>ref</td>
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<td>-</td>
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<td>要复制的另一 <code>atomic_ref</code> 对象</td>
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