87 lines
6.9 KiB
HTML
87 lines
6.9 KiB
HTML
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<title>std::experimental::unique_resource<R, D>::reset</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_experimental_unique_resource_reset 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::unique_resource<R, D>::</span>reset</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-unique_resource.html">unique resource</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> reset<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</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-libfund-ts-3 t-mark-ts">(库基础 TS v3)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span> <span class="sy1"><</span><span class="kw1">class</span> RR<span class="sy1">></span><br />
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<span class="kw4">void</span> reset<span class="br0">(</span> RR<span class="sy3">&&</span> r <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-libfund-ts-3 t-mark-ts">(库基础 TS v3)</span></td>
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<div class="t-li1"><span class="t-li">1)</span> 若 <code>unique_resource</code> 占有资源，则通过以底层资源柄调用删除器释放它。调用后 <code>unique_resource</code> 不占有资源。</div>
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<div class="t-li1"><span class="t-li">2)</span> 通过调用 <span class="t-v">(1)</span> 然后若 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-types-is_assignable.html"><span class="kw549">std::<span class="me2">is_nothrow_assignable_v</span></span></a><span class="sy1"><</span>RS, RR<span class="sy1">></span></span></span> 为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> 则以 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-forward.html"><span class="kw1117">std::<span class="me2">forward</span></span></a><span class="sy1"><</span>RR<span class="sy1">></span><span class="br0">(</span>r<span class="br0">)</span></span></span> ，否则以 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-utility-as_const.html"><span class="kw1121">std::<span class="me2">as_const</span></span></a><span class="br0">(</span>r<span class="br0">)</span></span></span> 赋值存储的资源柄替换资源，其中 <code>RS</code> 是存储的资源柄的类型。调用后 <code>unique_resource</code> 占有资源。</div>
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<div class="t-li1"><span class="t-li"></span> 若存储的资源柄的复制赋值抛异常，则调用 <span class="t-c"><span class="mw-geshi cpp source-cpp">del_<span class="br0">(</span>r<span class="br0">)</span></span></span> ，其中 <code>del</code> 是删除器对象。</div>
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<div class="t-li1"><span class="t-li"></span> 此重载仅若选择的赋值存储的资源柄的赋值表达式为良构才参与重载决议。</div>
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<div class="t-li1"><span class="t-li"></span> 若 <span class="t-c"><span class="mw-geshi cpp source-cpp">del_<span class="br0">(</span>r<span class="br0">)</span></span></span> 为谬构则程序为谬构。</div>
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<div class="t-li1"><span class="t-li"></span> 若 <span class="t-c"><span class="mw-geshi cpp source-cpp">del_<span class="br0">(</span>r<span class="br0">)</span></span></span> 导致未定义行为或抛异常则行为未定义。</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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<td>r</td>
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<td>-</td>
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<td>要管理的新资源的资源柄</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>（无）</p>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<div class="t-li1"><span class="t-li">2)</span> 任何赋值存储的资源柄时抛出的异常。</div>
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<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
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<p>该机制确保无资源泄漏。</p>
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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-memory-unique_ptr-reset.html"><span class="t-lines"><span>reset</span></span></a></div>
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<td>替换被管理对象<br />
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<span class="t-mark">(<code>std::unique_ptr<T,Deleter></code> 的公开成员函数)</span></td>
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