59 lines
4.6 KiB
HTML
59 lines
4.6 KiB
HTML
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<title>std::experimental::future<T>::operator=</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_future_operator 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::experimental::future<T>::</span>operator=</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-experimental.html">experimental</a>‎ | <a href="cpp-experimental-future.html">future</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">future</span><span class="sy1"><</span>T<span class="sy1">></span><span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">future</span><span class="sy1"><</span>T<span class="sy1">></span><span class="sy3">&&</span> other <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
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<div><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">future</span><span class="sy1"><</span>T<span class="sy1">></span><span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> <span class="kw4">const</span> std<span class="sy4">::</span><span class="me2">experimental</span><span class="sy4">::</span><span class="me2">future</span><span class="sy1"><</span>T<span class="sy1">></span><span class="sy3">&</span> other <span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span></span></div>
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<p>赋值另一 <code>future</code> 对象的内容。</p>
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<p>1) 释放任何共享状态并移动赋值 <code>other</code> 给 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 。赋值后 <span class="t-c"><span class="mw-geshi cpp source-cpp">other.<span class="me1">valid</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">==</span> <span class="kw2">false</span></span></span> 而 <a href="cpp-thread-future-valid.html"><span class="t-c"><span class="mw-geshi cpp source-cpp">this<span class="sy2">-</span><span class="sy1">></span>valid<span class="br0">(</span><span class="br0">)</span></span></span></a> 将生成与 <span class="t-c"><span class="mw-geshi cpp source-cpp">other.<span class="me1">valid</span><span class="br0">(</span><span class="br0">)</span></span></span> 在赋值前相同的值。</p>
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<p>2) <span class="t-lc">std::experimental::future</span> 不<a href="cpp-named_req-CopyAssignable.html"><span style="font-style:italic">可复制赋值</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(CopyAssignable)</span></a> 。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<td>other</td>
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<td>将传递状态给 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 的 <code>std::experimental::future</code></td>
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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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<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span></p>
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