89 lines
5.7 KiB
HTML
89 lines
5.7 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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<title>std::get_pointer_safety</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_memory_gc_get_pointer_safety 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::</span>get_pointer_safety</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></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>定义于头文件 <code><a href="cpp-header-memory.html"><memory></a></code></div>
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<td></td>
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<div><span class="mw-geshi cpp source-cpp"><a href="cpp-memory-gc-pointer_safety.html"><span class="kw751">std::<span class="me2">pointer_safety</span></span></a> get_pointer_safety<span class="br0">(</span><span class="br0">)</span> <span class="kw1">noexcept</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-cxx11">(C++11 起)</span><br />
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<span class="t-mark-rev t-until-cxx23">(C++23 中移除)</span></td>
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<tr class="t-dcl-sep">
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<p>获得实现定义的指针安全模式，它是 <span class="t-lc"><a href="cpp-memory-gc-pointer_safety.html">std::pointer_safety</a></span> 类型的值。</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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<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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<p>此实现所用的 pointer_safety 。</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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<div class="t-example">
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <iostream></span>
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<span class="co2">#include <memory></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"Pointer safety: "</span><span class="sy4">;</span>
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<span class="kw1">switch</span> <span class="br0">(</span>std<span class="sy4">::</span><span class="me2">get_pointer_safety</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
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<span class="kw1">case</span> <a href="cpp-memory-gc-pointer_safety.html"><span class="kw754">std::<span class="me2">pointer_safety</span><span class="sy4">::</span><span class="me2">strict</span></span></a><span class="sy4">:</span> <a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"strict<span class="es1">\n</span>"</span><span class="sy4">;</span> <span class="kw1">break</span><span class="sy4">;</span>
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<span class="kw1">case</span> <a href="cpp-memory-gc-pointer_safety.html"><span class="kw753">std::<span class="me2">pointer_safety</span><span class="sy4">::</span><span class="me2">preferred</span></span></a><span class="sy4">:</span> <a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"preferred<span class="es1">\n</span>"</span><span class="sy4">;</span> <span class="kw1">break</span><span class="sy4">;</span>
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<span class="kw1">case</span> <a href="cpp-memory-gc-pointer_safety.html"><span class="kw752">std::<span class="me2">pointer_safety</span><span class="sy4">::</span><span class="me2">relaxed</span></span></a><span class="sy4">:</span> <a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> <span class="st0">"relaxed<span class="es1">\n</span>"</span><span class="sy4">;</span> <span class="kw1">break</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="br0">}</span></pre></div>
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</div>
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<p>可能的输出：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">Pointer safety: relaxed</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<table class="t-dsc-begin">
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<div class="t-dsc-member-div">
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<div><a href="cpp-memory-gc-pointer_safety.html"><span class="t-lines"><span>pointer_safety</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 class="t-mark-rev t-until-cxx23">(C++23 中移除)</span></span></span></div>
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</div>
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</td>
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<td>列出指针安全模式<br />
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<span class="t-mark">(枚举)</span></td>
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