118 lines
7.4 KiB
HTML
118 lines
7.4 KiB
HTML
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<title>std::regex_iterator<BidirIt,CharT,Traits>::regex_iterator</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_regex_regex_iterator_regex_iterator 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::regex_iterator<BidirIt,CharT,Traits>::</span>regex_iterator</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-regex_iterator.html">regex iterator</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><span class="mw-geshi cpp source-cpp">regex_iterator<span class="br0">(</span><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">regex_iterator<span class="br0">(</span>BidirIt a, BidirIt b,<br /></span>
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<p> <span class="kw4">const</span> regex_type<span class="sy3">&</span> re,<br />
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<a href="cpp-regex-match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> m <span class="sy1">=</span><br /></p>
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<a href="cpp-regex-match_flag_type.html"><span class="kw2039">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a><span class="br0">)</span><span class="sy4">;</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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<tr class="t-dcl t-since-cxx11">
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<div><span class="mw-geshi cpp source-cpp">regex_iterator<span class="br0">(</span><span class="kw4">const</span> regex_iterator<span class="sy3">&</span><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">regex_iterator<span class="br0">(</span>BidirIt, BidirIt,<br /></span>
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<p> <span class="kw4">const</span> regex_type<span class="sy3">&&</span>,<br />
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<a href="cpp-regex-match_flag_type.html"><span class="kw2038">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_flag_type</span></span></a> <span class="sy1">=</span><br /></p>
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<a href="cpp-regex-match_flag_type.html"><span class="kw2039">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">match_default</span></span></a><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span></div>
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</td>
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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>
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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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</tbody>
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<p>构造新的 <code>regex_iterator</code> ：</p>
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<div class="t-li1"><span class="t-li">1)</span> 默认构造函数。构造序列尾迭代器。</div>
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<div class="t-li1"><span class="t-li">2)</span> 从字符序列 <code>[a, b)</code> 、正则表达式 <code>re</code> 和掌管匹配行为的标志 <code>m</code> 构造 <code>regex_iterator</code> 。此构造函数以此数据进行 <span class="t-lc"><a href="cpp-regex-regex_search.html">std::regex_search</a></span> 的初始调用。若此初始调用结构为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> ，则设置 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span> 为序列尾迭代器。</div>
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<div class="t-li1"><span class="t-li">3)</span> 复制 <code>regex_iterator</code> 。</div>
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<div class="t-li1"><span class="t-li">4)</span> 不允许以临时 regex 调用重载 <code>2</code> ，因为返回的迭代会被立即非法化。</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>a</td>
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<td>-</td>
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<td>指向目标字符序列起始的 <code>BidirIt</code></td>
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</tr>
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<tr class="t-par">
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<td>b</td>
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<td>-</td>
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<td>指向目标字符序列结尾的 <code>BidirIt</code></td>
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</tr>
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<tr class="t-par">
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<td>re</td>
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<td>-</td>
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<td>用于搜索目标字符序列的正则表达式</td>
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</tr>
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<tr class="t-par">
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<td>m</td>
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<td>-</td>
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<td>掌管 <code>re</code> 行为的标志</td>
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</tr>
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</table>
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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=".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/issue2332">LWG 2332</a></td>
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<td>C++11</td>
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<td>从临时 <code>basic_regex</code> 构造的 <code>regex_iterator</code> 会立即变为非法</td>
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<td>通过被删除的重载禁止这种构造</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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