158 lines
12 KiB
HTML
158 lines
12 KiB
HTML
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<title>std::basic_regex<CharT,Traits>::assign</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_regex_basic_regex_assign 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::basic_regex<CharT,Traits>::</span>assign</h1>
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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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<div><span class="mw-geshi cpp source-cpp">basic_regex<span class="sy3">&</span> assign<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>(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> assign<span class="br0">(</span> basic_regex<span class="sy3">&&</span> that <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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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> assign<span class="br0">(</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> s,<br />
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flag_type f <span class="sy1">=</span> <a href="cpp-regex-syntax_option_type.html"><span class="kw2032">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">ECMAScript</span></span></a> <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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<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> assign<span class="br0">(</span> <span class="kw4">const</span> CharT<span class="sy2">*</span> ptr, size_t count,<br />
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flag_type f <span class="sy1">=</span> <a href="cpp-regex-syntax_option_type.html"><span class="kw2032">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">ECMAScript</span></span></a> <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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<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 /></span>
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<p>basic_regex<span class="sy3">&</span> assign<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> str,<br /></p>
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flag_type f <span class="sy1">=</span> <a href="cpp-regex-syntax_option_type.html"><span class="kw2032">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">ECMAScript</span></span></a> <span class="br0">)</span><span class="sy4">;</span></div>
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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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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> InputIt <span class="sy1">></span><br /></span>
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<p>basic_regex<span class="sy3">&</span> assign<span class="br0">(</span> InputIt first, InputIt last,<br /></p>
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flag_type f <span class="sy1">=</span> <a href="cpp-regex-syntax_option_type.html"><span class="kw2032">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">ECMAScript</span></span></a> <span class="br0">)</span><span class="sy4">;</span></div>
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<td>(6)</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> assign<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> ilist,<br />
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flag_type f <span class="sy1">=</span> <a href="cpp-regex-syntax_option_type.html"><span class="kw2032">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">ECMAScript</span></span></a> <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(7)</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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<p>赋值内容给正则表达式。</p>
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<div class="t-li1"><span class="t-li">1)</span> 赋值 <code>other</code> 的内容。调用后 <span class="t-lc"><a href="cpp-regex-basic_regex-flags.html">flags()</a></span> 和 <span class="t-lc"><a href="cpp-regex-basic_regex-mark_count.html">mark_count()</a></span> 等于 <span class="t-c"><span class="mw-geshi cpp source-cpp">other.<span class="me1">flags</span><span class="br0">(</span><span class="br0">)</span></span></span> 和 <span class="t-c"><span class="mw-geshi cpp source-cpp">other.<span class="me1">mark_count</span><span class="br0">(</span><span class="br0">)</span></span></span> 的值。</div>
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<div class="t-li1"><span class="t-li">2)</span> 用移动语义赋值 <code>other</code> 的内容。 <span class="t-lc"><a href="cpp-regex-basic_regex-flags.html">flags()</a></span> 和 <span class="t-lc"><a href="cpp-regex-basic_regex-mark_count.html">mark_count()</a></span> 等于 <span class="t-c"><span class="mw-geshi cpp source-cpp">other.<span class="me1">flags</span><span class="br0">(</span><span class="br0">)</span></span></span> 和 <span class="t-c"><span class="mw-geshi cpp source-cpp">other.<span class="me1">mark_count</span><span class="br0">(</span><span class="br0">)</span></span></span> 在赋值前的值。调用后， <code>other</code> 在合法但未指定的状态。</div>
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<div class="t-li1"><span class="t-li">3-7)</span> 赋值字符序列给正则表达式。设置语法标志为 <code>f</code> 。调用后 <span class="t-lc"><a href="cpp-regex-basic_regex-mark_count.html">mark_count()</a></span> 产生的子表达式中的有标记子表达式数。</div>
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<div class="t-li2"><span class="t-li">3)</span> 赋值 <code>s</code> 所指向的空终止字符串。</div>
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<div class="t-li2"><span class="t-li">4)</span> 赋值 <code>s</code> 所指向的 <code>count</code> 个字符序列。</div>
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<div class="t-li2"><span class="t-li">5)</span> 赋值 string <code>str</code> 。</div>
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<div class="t-li2"><span class="t-li">6)</span> 赋值范围 <code>[first, last)</code> 中的字符。</div>
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<div class="t-li2"><span class="t-li">7)</span> 赋值 initializer_list <code>ilist</code> 中的字符。</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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<td>other</td>
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<td>-</td>
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<td>要赋值的另一正则表达式</td>
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</tr>
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<tr class="t-par">
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<td>s</td>
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<td>-</td>
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<td>指向要赋值的字符序列的指针</td>
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</tr>
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<tr class="t-par">
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<td>str</td>
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<td>-</td>
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<td>要赋值的 string</td>
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<tr class="t-par">
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<td>first, last</td>
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<td>-</td>
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<td>要赋值的字符范围</td>
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<tr class="t-par">
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<td>ilist</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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<td colspan="3">类型要求</td>
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<tr class="t-par-req">
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<td colspan="3">-
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<div class="spacer"></div>
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<code>InputIt</code> 必须满足<a href="cpp-named_req-InputIterator.html"><span style="font-style:italic">老式输入迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(LegacyInputIterator)</span></a> 的要求。</td>
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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">3-7)</span> 若提供的正则表达式非法则为 <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=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style="">
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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：暂无示例</td>
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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-operator=.html"><span class="t-lines"><span>operator=</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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<div class="visualClear"></div>
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