63 lines
4.4 KiB
HTML
63 lines
4.4 KiB
HTML
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<title>std::basic_regex 的推导指引</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_regex_basic_regex_deduction_guides skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><code>std::basic_regex</code> 的推导指引</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>定义于头文件 <code><a href="cpp-header-regex.html"><regex></a></code></div>
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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> ForwardIt<span class="sy1">></span><br /></span>
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<p>basic_regex<span class="br0">(</span>ForwardIt, ForwardIt,<br />
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<a href="cpp-regex-syntax_option_type.html"><span class="kw2027">std::<span class="me2">regex_constants</span><span class="sy4">::</span><span class="me2">syntax_option_type</span></span></a> <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><br /></p>
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<span class="sy2">-</span><span class="sy1">></span> basic_regex<span class="sy1"><</span><span class="kw1">typename</span> <a href="cpp-iterator-iterator_traits.html"><span class="kw651">std::<span class="me2">iterator_traits</span></span></a><span class="sy1"><</span>ForwardIt<span class="sy1">></span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy1">></span><span class="sy4">;</span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<p>为 <span class="t-lc"><a href="cpp-regex-basic_regex.html">std::basic_regex</a></span> 提供此<a href="cpp-language-class_template_argument_deduction.html">推导指引</a> ，以允许从迭代器范围推导。</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 class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <regex></span>
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<span class="co2">#include <vector></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span> <span class="br0">{</span>
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<a href="cpp-container-vector.html"><span class="kw1269">std::<span class="me2">vector</span></span></a><span class="sy1"><</span><span class="kw4">char</span><span class="sy1">></span> v <span class="sy1">=</span> <span class="br0">{</span><span class="st0">'a'</span>, <span class="st0">'b'</span>, <span class="st0">'c'</span><span class="br0">}</span><span class="sy4">;</span>
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<a href="cpp-regex-basic_regex.html"><span class="kw1999">std::<span class="me2">basic_regex</span></span></a> re<span class="br0">{</span>v.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, v.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">}</span><span class="sy4">;</span> <span class="co1">// 使用显式推导指引</span>
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<span class="br0">}</span></pre></div>
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