121 lines
7.7 KiB
HTML
121 lines
7.7 KiB
HTML
<!DOCTYPE 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>std::basic_regex<CharT,Traits>::operator=</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_regex_basic_regex_operator 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::basic_regex<CharT,Traits>::</span>operator=</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-regex.html">regex</a>‎ | <a href="cpp-regex-basic_regex.html">basic regex</a></span></div>
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<table class="t-dcl-begin">
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<tbody>
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<td>
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<div>定义于头文件 <code><a href="cpp-header-regex.html"><regex></a></code></div>
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<td></td>
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<td></td>
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<tr class="t-dcl t-since-cxx11">
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<div><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> <span class="kw4">const</span> basic_regex<span class="sy3">&</span> other <span class="br0">)</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-cxx11">(C++11 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> basic_regex<span class="sy3">&&</span> other <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>(2)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> ptr <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> <a href="cpp-utility-initializer_list.html"><span class="kw960">std::<span class="me2">initializer_list</span></span></a><span class="sy1"><</span>CharT<span class="sy1">></span> il <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(4)</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> ST, <span class="kw1">class</span> SA <span class="sy1">></span><br />
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basic_regex<span class="sy3">&</span> operator<span class="sy1">=</span><span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1"><</span>CharT,ST,SA<span class="sy1">></span><span class="sy3">&</span> p <span class="br0">)</span><span class="sy4">;</span></span></div>
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</td>
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<td>(5)</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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<td></td>
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</tr>
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</tbody>
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</table>
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<p>赋值内容。</p>
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<div class="t-li1"><span class="t-li">1)</span> 复制赋值运算符。赋值 <code>other</code> 的内容。等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">assign<span class="br0">(</span>other<span class="br0">)</span><span class="sy4">;</span></span></span> 。</div>
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<div class="t-li1"><span class="t-li">2)</span> 移动赋值运算符。用移动语义赋值 <code>other</code> 的内容。操作后 <code>other</code> 在合法但未指定的状态。等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">assign<span class="br0">(</span>other<span class="br0">)</span><span class="sy4">;</span></span></span> 。</div>
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<div class="t-li1"><span class="t-li">3)</span> 赋值 <code>ptr</code> 所指向的空终止字符串。等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">assign<span class="br0">(</span>ptr<span class="br0">)</span><span class="sy4">;</span></span></span> 。</div>
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<div class="t-li1"><span class="t-li">4)</span> 赋值 initializer_list <code>il</code> 中含有的字符。等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">assign<span class="br0">(</span>il<span class="br0">)</span><span class="sy4">;</span></span></span> 。</div>
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<div class="t-li1"><span class="t-li">5)</span> 赋值 string <code>p</code> 的内容。等价于 <span class="t-c"><span class="mw-geshi cpp source-cpp">assign<span class="br0">(</span>p<span class="br0">)</span><span class="sy4">;</span></span></span> 。</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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<table class="t-par-begin">
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<tr class="t-par">
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<td>other</td>
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<td>-</td>
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<td>另一 regex 对象</td>
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</tr>
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<tr class="t-par">
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<td>ptr</td>
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<td>-</td>
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<td>指向空终止字符串的指针</td>
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</tr>
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<tr class="t-par">
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<td>il</td>
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<td>-</td>
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<td>含要赋值的字符的 initializer_list</td>
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</tr>
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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>含要赋值的字符的 string</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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<p><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 。</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">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">3-5)</span> 若提供的正则表达式非法则抛出 <span class="t-lc"><a href="cpp-regex-regex_error.html">std::regex_error</a></span> 。该情况下不修改对象。</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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<div class="t-dsc-member-div">
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<div><a href="cpp-regex-basic_regex-assign.html"><span class="t-lines"><span>assign</span></span></a></div>
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</div>
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</td>
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<td>赋值内容<br />
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<span class="t-mark">(公开成员函数)</span></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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</div>
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