69 lines
4.7 KiB
HTML
69 lines
4.7 KiB
HTML
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<title>std::num_get<CharT,InputIt>::~num_get</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::num_get<CharT,InputIt>::</span>~num_get</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-locale.html">locale</a>‎ | <a href="cpp-locale-num_get.html">num get</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-locale.html"><locale></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">protected</span><span class="sy4">:</span> ~num_get<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>析构 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-locale-num_get.html"><span class="kw1955">std::<span class="me2">num_get</span></span></a></span></span> 平面。此析构函数为受保护且为虚（由于<a href="cpp-locale-locale-facet.html">基类</a>析构函数为虚）。 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-locale-num_get.html"><span class="kw1955">std::<span class="me2">num_get</span></span></a></span></span> 类型对象，同大多数平面，只能在最后一个实装此平面的 <span class="t-lc"><a href="cpp-locale-locale.html">std::locale</a></span> 离开作用域时，或若用户定义导出自 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-locale-num_get.html"><span class="kw1955">std::<span class="me2">num_get</span></span></a></span></span> 并实现公开构造函数，才会被销毁。</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 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 <locale></span>
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<span class="kw1">struct</span> Destructible_num_get <span class="sy4">:</span> <span class="kw1">public</span> <a href="cpp-locale-num_get.html"><span class="kw1955">std::<span class="me2">num_get</span></span></a><span class="sy1"><</span><span class="kw4">wchar_t</span><span class="sy1">></span>
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<span class="br0">{</span>
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Destructible_num_get<span class="br0">(</span><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> refs <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="sy4">:</span> num_get<span class="br0">(</span>refs<span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
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<span class="co1">// 注意：隐式析构函数为公开</span>
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<span class="br0">}</span><span class="sy4">;</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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Destructible_num_get dc<span class="sy4">;</span>
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<span class="co1">// std::num_get<wchar_t> c; // 编译错误：受保护析构函数</span>
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<span class="br0">}</span></pre></div>
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