113 lines
8.7 KiB
HTML
113 lines
8.7 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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<title>operator<<,>>(std::shuffle_order_engine)</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_numeric_random_shuffle_order_engine_operator_ltltgtgt skin-cppreference2 action-view cpp-page-template cpp-navbar">
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<h1 id="firstHeading" class="firstHeading">operator<<,>><small>(std::shuffle_order_engine)</small></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-numeric.html">numeric</a>‎ | <a href="cpp-numeric-random.html">random</a>‎ | <a href="cpp-numeric-random-shuffle_order_engine.html">shuffle order engine</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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<div class="t-page-template" style="">
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<p></p>
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</div>
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<table class="t-dcl-begin">
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<tbody>
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<tr class="t-dcl t-since-cxx11">
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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> CharT, <span class="kw1">class</span> Traits <span class="sy1">></span><br /></span>
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<p><span class="kw1">friend</span> <a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span><br />
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operator<span class="sy1"><<</span><span class="br0">(</span> <a href="cpp-io-basic_ostream.html"><span class="kw1715">std::<span class="me2">basic_ostream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span> ost,<br /></p>
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shuffle_order_engine<span class="sy1"><></span><span class="sy3">&</span> e <span class="br0">)</span><span class="sy4">;</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-cxx11">(C++11 起)</span></td>
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<tr class="t-dcl t-since-cxx11">
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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> CharT, <span class="kw1">class</span> Traits <span class="sy1">></span><br /></span>
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<p><span class="kw1">friend</span> <a href="cpp-io-basic_istream.html"><span class="kw1713">std::<span class="me2">basic_istream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span><br />
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operator<span class="sy1">>></span><span class="br0">(</span> <a href="cpp-io-basic_istream.html"><span class="kw1713">std::<span class="me2">basic_istream</span></span></a><span class="sy1"><</span>CharT,Traits<span class="sy1">></span><span class="sy3">&</span> ist,<br /></p>
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shuffle_order_engine<span class="sy3">&</span> e <span class="br0">)</span><span class="sy4">;</span></div>
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</td>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<tr class="t-dcl-sep">
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<td></td>
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<td></td>
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<div class="t-li1"><span class="t-li">1)</span> 序列化伪随机数引擎适配器的内部状态为一或多个空格所分隔的十进制数序列，并将它插入流 <code>ost</code> 。忽略且不影响填充字符和格式化标签。</div>
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<div class="t-li1"><span class="t-li">2)</span> 从序列化表示恢复伪随机数引擎适配器 <code>e</code> 的内部状态，该表示由先前对 <code>operator<<</code> ，以拥有相同的感染本地环境、相同的 <code>CharT</code> 和 <code>Traits</code> 的流调用创建。若不能反序列化输入，则保留 <code>e</code> 不更改并引发 <code>ist</code> 上的 <code>failbit</code> 。</div>
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<p>这些函数模板对通常<a href="cpp-language-unqualified_lookup.html">无限定</a>或<a href="cpp-language-qualified_lookup.html">有限定查找</a>不可见，而只能在 <code>std::shuffle_order_engine<Engine,p,r></code> 为参数的关联类时由<a href="cpp-language-adl.html">实参依赖查找</a>找到。</p>
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<p>若用 <span class="t-c"><span class="mw-geshi cpp source-cpp">os <span class="sy1"><<</span> x</span></span> 写入文本表示并用 <span class="t-c"><span class="mw-geshi cpp source-cpp">is <span class="sy1">>></span> y</span></span> 将它恢复到同一类型的相同或不同对象 <code>y</code> ，则 <span class="t-c"><span class="mw-geshi cpp source-cpp">x<span class="sy1">==</span>y</span></span> 。</p>
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<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
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<tr>
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<td class="mbox-empty-cell"></td>
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<td class="mbox-text" style="">本节未完成<br />
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原因：标准还定义了文本表示的组成内容</td>
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</tr>
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</table>
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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>ost</td>
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<td>-</td>
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<td>要插入数据的输出流</td>
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</tr>
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<tr class="t-par">
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<td>ist</td>
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<td>-</td>
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<td>要提取数据的输入流</td>
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</tr>
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<tr class="t-par">
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<td>e</td>
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<td>-</td>
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<td>要序列化或恢复的引擎适配器</td>
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</tr>
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</table>
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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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<div class="t-li1"><span class="t-li">1)</span> <code>ost</code></div>
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<div class="t-li1"><span class="t-li">2)</span> <code>ist</code></div>
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<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">复杂度</span></h3>
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<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
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<tr>
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<td class="mbox-empty-cell"></td>
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<td class="mbox-text" style="">本节未完成</td>
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</tr>
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</table>
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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">1)</span> 可能抛出实现定义的异常。</div>
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<div class="t-li1"><span class="t-li">2)</span> 设置了 <code>failbit</code> 时可能抛出 <span class="t-lc"><a href="cpp-io-ios_base-failure.html">std::ios_base::failure</a></span> 。</div>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">缺陷报告</span></h3>
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<p>下列更改行为的缺陷报告追溯地应用于以前出版的 C++ 标准。</p>
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<table class="dsctable" style="font-size:0.8em">
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<tr>
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<th>DR</th>
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<th>应用于</th>
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<th>出版时的行为</th>
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<th>正确行为</th>
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</tr>
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<tr>
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<td><a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue3519">LWG 3519</a></td>
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<td>C++11</td>
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<td>插入与提取运算符的形式未指定</td>
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<td>指定为隐藏友元</td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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</div>
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</body>
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