65 lines
3.5 KiB
HTML
65 lines
3.5 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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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::pmr::polymorphic_allocator<T>::destroy</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_memory_polymorphic_allocator_destroy skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::pmr::polymorphic_allocator<T>::</span>destroy</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-memory.html">memory</a>‎ | <a href="cpp-memory-polymorphic_allocator.html">polymorphic allocator</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<table class="t-dcl-begin">
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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> U<span class="sy1">></span><br />
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<span class="kw4">void</span> destroy<span class="br0">(</span>U<span class="sy2">*</span> p<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span><br />
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<span class="t-mark">(C++20 中弃用)</span></td>
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<td></td>
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<p>销毁 <code>p</code> 所指向的对象，如同以调用 <span class="t-c"><span class="mw-geshi cpp source-cpp">p<span class="sy2">-</span><span class="sy1">></span>~U<span class="br0">(</span><span class="br0">)</span></span></span> 。</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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<table class="t-par-begin">
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<tr class="t-par">
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<td>p</td>
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<td>-</td>
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<td>指向被销毁对象的指针</td>
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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>此函数由 <a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue3036">LWG 问题 3036</a> 弃用，因为其功能能由 <span class="t-lc"><a href="cpp-memory-allocator_traits-destroy.html">std::allocator_traits::destroy</a></span> 的默认实现提供，从而是多余的。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-allocator_traits-destroy.html"><span class="t-lines"><span>destroy</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-cmark">[静态]</span></span></span></div>
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</div>
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</td>
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<td>析构存储于已分配存储的对象<br />
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<span class="t-mark">(函数模板)</span></td>
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