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<header data-kunai-mdinfo="{&#34;meta&#34;: {&#34;header&#34;: [&#34;regex&#34;], &#34;namespace&#34;: [&#34;std&#34;], &#34;id-type&#34;: [&#34;function template&#34;], &#34;cpp&#34;: [&#34;cpp11&#34;]}, &#34;sources&#34;: [{&#34;id&#34;: &#34;bdda39b992b80ccd257a314aa451c81ca6a8fc64&#34;, &#34;source&#34;: &#34;#include &lt;iostream&gt;\n#include &lt;iterator&gt;\n#include &lt;list&gt;\n#include &lt;regex&gt;\n#include &lt;string&gt;\n\nint main()\n{\n  std::cout &lt;&lt; std::boolalpha;\n  {\n    // (1) \u306e\u5f62\u5f0f\n    const std::list&lt;char&gt; s = { &#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;1&#39;, &#39;2&#39;, &#39;3&#39;, &#39;d&#39;, &#39;e&#39;, &#39;f&#39; };\n    std::match_results&lt;std::list&lt;char&gt;::const_iterator&gt; m;\n    std::cout &lt;&lt; \&#34;(1) \&#34; &lt;&lt; std::regex_search(std::begin(s), std::end(s), m, std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n    std::cout &lt;&lt; \&#34;str = &#39;\&#34; &lt;&lt; m.str() &lt;&lt; \&#34;&#39;, position = \&#34; &lt;&lt; m.position() &lt;&lt; std::endl;\n  }\n  {\n    // (2) \u306e\u5f62\u5f0f\n    std::cmatch m;\n    std::cout &lt;&lt; \&#34;(2) \&#34; &lt;&lt; std::regex_search(\&#34;abc123def\&#34;, m, std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n    std::cout &lt;&lt; \&#34;str = &#39;\&#34; &lt;&lt; m.str() &lt;&lt; \&#34;&#39;, position = \&#34; &lt;&lt; m.position() &lt;&lt; std::endl;\n  }\n  {\n    // (3) \u306e\u5f62\u5f0f\n    const std::string s = \&#34;abc123def\&#34;;\n    std::smatch m;\n    std::cout &lt;&lt; \&#34;(3) \&#34; &lt;&lt; std::regex_search(s, m, std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n    std::cout &lt;&lt; \&#34;str = &#39;\&#34; &lt;&lt; m.str() &lt;&lt; \&#34;&#39;, position = \&#34; &lt;&lt; m.position() &lt;&lt; std::endl;\n  }\n  {\n    // (4) \u306e\u5f62\u5f0f\uff08\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3092\u5916\u3059\u3068 C++14 \u3067\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308b\uff09\n    //std::smatch m;\n    //std::cout &lt;&lt; \&#34;(4) \&#34; &lt;&lt; std::regex_search(std::string(\&#34;abc123def\&#34;), m, std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n    //std::cout &lt;&lt; \&#34;str = &#39;\&#34; &lt;&lt; m.str() &lt;&lt; \&#34;&#39;, position = \&#34; &lt;&lt; m.position() &lt;&lt; std::endl;\n  }\n  {\n    // (5) \u306e\u5f62\u5f0f\n    const std::list&lt;char&gt; s = { &#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;1&#39;, &#39;2&#39;, &#39;3&#39;, &#39;d&#39;, &#39;e&#39;, &#39;f&#39; };\n    std::cout &lt;&lt; \&#34;(5) \&#34; &lt;&lt; std::regex_search(std::begin(s), std::end(s), std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n  }\n  {\n    // (6) \u306e\u5f62\u5f0f\n    std::cout &lt;&lt; \&#34;(6) \&#34; &lt;&lt; std::regex_search(\&#34;abc123def\&#34;, std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n  }\n  {\n    // (7) \u306e\u5f62\u5f0f\u3001\u305d\u306e\uff11\n    const std::string s = \&#34;abc123def\&#34;;\n    std::cout &lt;&lt; \&#34;(7)-1 \&#34; &lt;&lt; std::regex_search(s, std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n  }\n  {\n    // (7) \u306e\u5f62\u5f0f\u3001\u305d\u306e\uff12\uff08C++14 \u3067\u3082\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\uff09\n    std::cout &lt;&lt; \&#34;(7)-2 \&#34; &lt;&lt; std::regex_search(std::string(\&#34;abc123def\&#34;), std::regex(\&#34;\\\\d+\&#34;)) &lt;&lt; std::endl;\n  }\n}\n&#34;}], &#34;page_id&#34;: [&#34;reference&#34;, &#34;regex&#34;, &#34;regex_search&#34;]}">
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  <div class="identifier-type">function template</div><div class="header">&lt;regex&gt;</div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="token">regex_search</span><span class="cpp cpp11" title="C++11で追加">(C++11)</span></h1>
<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span><span class="w"> </span><span class="nn">std</span><span class="w"> </span><span class="p">{</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">BidirectionalIterator</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">Allocator</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="n">BidirectionalIterator</span><span class="w"> </span><span class="n">first</span><span class="p">,</span><span class="w"> </span><span class="n">BidirectionalIterator</span><span class="w"> </span><span class="n">last</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="match_results.html">match_results</a></span><span class="o">&lt;</span><span class="n">BidirectionalIterator</span><span class="p">,</span><span class="w"> </span><span class="n">Allocator</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">m</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">);</span><span class="w">          </span><span class="c1">// (1)</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">Allocator</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n">charT</span><span class="o">*</span><span class="w"> </span><span class="n">str</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="match_results.html">match_results</a></span><span class="o">&lt;</span><span class="k">const</span><span class="w"> </span><span class="n">charT</span><span class="o">*</span><span class="p">,</span><span class="w"> </span><span class="n">Allocator</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">m</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">);</span><span class="w">          </span><span class="c1">// (2)</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">ST</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">SA</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">Allocator</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../string/basic_string.html">basic_string</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">ST</span><span class="p">,</span><span class="w"> </span><span class="n">SA</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">s</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="match_results.html">match_results</a></span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc"><a href="../string/basic_string.html">basic_string</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">ST</span><span class="p">,</span><span class="w"> </span><span class="n">SA</span><span class="o">&gt;::</span><span class="n">const_iterator</span><span class="p">,</span><span class="w"> </span><span class="n">Allocator</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">m</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">);</span><span class="w">          </span><span class="c1">// (3)</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">ST</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">SA</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">Allocator</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="n"><a href="../string/basic_string.html">basic_string</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">ST</span><span class="p">,</span><span class="w"> </span><span class="n">SA</span><span class="o">&gt;&amp;&amp;</span><span class="w"> </span><span class="n">s</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="match_results.html">match_results</a></span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc"><a href="../string/basic_string.html">basic_string</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">ST</span><span class="p">,</span><span class="w"> </span><span class="n">SA</span><span class="o">&gt;::</span><span class="n">const_iterator</span><span class="p">,</span><span class="w"> </span><span class="n">Allocator</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">m</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">delete</span><span class="p">;</span><span class="w"> </span><span class="c1">// (4) C++14 から</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">BidirectionalIterator</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="n">BidirectionalIterator</span><span class="w"> </span><span class="n">first</span><span class="p">,</span><span class="w"> </span><span class="n">BidirectionalIterator</span><span class="w"> </span><span class="n">last</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">);</span><span class="w">          </span><span class="c1">// (5)</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n">charT</span><span class="o">*</span><span class="w"> </span><span class="n">str</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">);</span><span class="w">          </span><span class="c1">// (6)</span>
<span class="w">  </span><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">class</span><span class="w"> </span><span class="nc">ST</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">SA</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">charT</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="w"> </span><span class="nc">traits</span><span class="o">&gt;</span>
<span class="w">  </span><span class="kt">bool</span><span class="w"> </span><span class="n">regex_search</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../string/basic_string.html">basic_string</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">ST</span><span class="p">,</span><span class="w"> </span><span class="n">SA</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">s</span><span class="p">,</span>
<span class="w">                    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="basic_regex.html">basic_regex</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="p">,</span><span class="w"> </span><span class="n">traits</span><span class="o">&gt;&amp;</span><span class="w"> </span><span class="n">e</span><span class="p">,</span>
<span class="w">                    </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_flag_type</a></span><span class="w"> </span><span class="n">flags</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="regex_constants/match_flag_type.html">regex_constants::match_default</a></span><span class="p">);</span><span class="w">          </span><span class="c1">// (7)</span>
<span class="p">}</span>
</code></pre></div>
<h2>概要</h2>
<p>指定された文字列中に、正規表現がマッチする部分が存在するか否かの判定を行う。<br />
引数に <code><a href="match_results.html">match_results</a></code> がある場合、当該オブジェクトにマッチの結果を格納する。<br />
なお、同様の関数である <code><a href="regex_match.html">regex_match</a></code> と異なり、正規表現が文字列全体にマッチする必要はない。</p>
<h2>要件</h2>
<p><code>BidirectionalIterator</code> は双方向イテレータの要件を満たすこと。</p>
<h2>効果</h2>
<li>(1) <code>[first, last)</code> で指定された文字列中に、<code>e</code> で指定された正規表現にマッチする部分が存在するか否かの判定を行う。<br />
<code>flags</code> は正規表現が文字列に対してどのようにマッチするかを指定する。</li>
<li>(2) <code>return regex_search(str, str + <a href="../string/char_traits.html">char_traits</a>::<a href="../string/char_traits/length.html">length</a>(str), m, e, flags)</code> と等価。</li>
<li>(3) <code>return regex_search(s.<a href="../string/basic_string/begin.html">begin</a>(), s.<a href="../string/basic_string/end.html">end</a>(), m, e, flags)</code> と等価。</li>
<li>(4) <code>deleted</code> 宣言されているため、使用するとコンパイルエラーとなる。</li>
<li>(5) <code><a href="match_results.html">match_results</a>&lt;BidirectionalIterator&gt;</code> 型のダミーオブジェクト <code>what</code> を構築し、<code>return regex_search(first, last, what, e, flags)</code> としたものと等価。</li>
<li>(6) <code>return regex_search(str, str + <a href="../string/char_traits.html">char_traits</a>::<a href="../string/char_traits/length.html">length</a>(str), e, flags)</code> と等価。</li>
<li>(7) <code>return regex_search(s.<a href="../string/basic_string/begin.html">begin</a>(), s.<a href="../string/basic_string/end.html">end</a>(), e, flags)</code> と等価。</li>
<h2><a class="cpprefjp-defined-word" data-desc="関数等の意味論を構成する要素の1つ。Postconditions。関数を実行後に満たされている条件。契約属性の`[[ensures]]`に相当">事後条件</a></h2>
<p>(1) 常に <code>m.<a href="match_results/ready.html">ready</a>() == true</code> となる。<br />
    もし、<a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a>が <code>false</code> の場合、<code>m</code> の <code><a href="match_results/ready.html">ready</a>()</code> 以外の状態については、<code>m.<a href="match_results/size.html">size</a>() == 0</code> および <code>m.<a href="match_results/empty.html">empty</a>() == true</code> となる事以外は<a class="cpprefjp-defined-word" data-desc="未規定の動作。事前の断りなく処理系によって異なる動作をする" href="../../implementation-compliance.html#dfn-unspecified-behavior">未規定</a>である。<br />
    もし、<a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a>が <code>true</code> の場合、<code>m</code> の <code><a href="match_results/ready.html">ready</a>()</code> 以外の状態は以下の表を満たす。</p>
<table border="1" bordercolor="#888" style="border-collapse:collapse">
<th>要素</th>
<td><code>m.<a href="match_results/size.html">size</a>()</code></td>
<td><code>1 + e.<a href="basic_regex/mark_count.html">mark_count</a>()</code></td>
<td><code>m.<a href="match_results/empty.html">empty</a>()</code></td>
<td><code>false</code></td>
<td><code>m.<a href="match_results/prefix.html">prefix</a>().first</code></td>
<td><code>first</code></td>
<td><code>m.<a href="match_results/prefix.html">prefix</a>().second</code></td>
<td><code>m[0].first</code></td>
<td><code>m.<a href="match_results/prefix.html">prefix</a>().matched</code></td>
<td><code>m.<a href="match_results/prefix.html">prefix</a>().first != m.<a href="match_results/prefix.html">prefix</a>().second</code></td>
<td><code>m.<a href="match_results/suffix.html">suffix</a>().first</code></td>
<td><code>m[0].second</code></td>
<td><code>m.<a href="match_results/suffix.html">suffix</a>().second</code></td>
<td><code>last</code></td>
<td><code>m.<a href="match_results/suffix.html">suffix</a>().matched</code></td>
<td><code>m.<a href="match_results/suffix.html">suffix</a>().first != m.<a href="match_results/suffix.html">suffix</a>().second</code></td>
<td><code>m.[0].first</code></td>
<td>正規表現がマッチした文字列の最初の文字を指すイテレータ</td>
<td><code>m.[0].second</code></td>
<td>正規表現がマッチした文字列の最後の文字の次を指すイテレータ</td>
<td><code>m.[0].matched</code></td>
<td><code>true</code></td>
<td><code>m.[n].first</code></td>
<td><code>0 &lt; n &lt; m.<a href="match_results/size.html">size</a>()</code> となるすべての整数 <code>n</code> について、正規表現内の <code>n</code> 番目のキャプチャグループがマッチした文字列の最初の文字を指すイテレータ。<br />もし、<code>n</code> 番目のキャプチャグループがマッチに参加していない場合には、<code>last</code>。</td>
<td><code>m.[n].second</code></td>
<td><code>0 &lt; n &lt; m.<a href="match_results/size.html">size</a>()</code> となるすべての整数 <code>n</code> について、正規表現内の <code>n</code> 番目のキャプチャグループがマッチした文字列の最後の文字の次を指すイテレータ。<br />もし、<code>n</code> 番目のキャプチャグループがマッチに参加していない場合には、<code>last</code>。</td>
<td><code>m.[n].matched</code></td>
<td><code>0 &lt; n &lt; m.<a href="match_results/size.html">size</a>()</code> となるすべての整数 <code>n</code> について、正規表現内の <code>n</code> 番目のキャプチャグループがマッチに参加していれば <code>true</code>。<br />もし、<code>n</code> 番目のキャプチャグループがマッチに参加していない場合には、<code>false</code>。</td>
<h2><a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a></h2>
<p>指定した文字列中に、正規表現にマッチする部分が存在した場合、<code>true</code>。存在しなかった場合は <code>false</code>。</p>
<h2><a class="cpprefjp-defined-word" data-desc="問題が発生したときに、現在実行位置を過去に通過・記録した位置に戻し、文脈情報を添えて紐づけられた処理(例外ハンドラー)を呼び出す仕組み。またはその事態">例外</a></h2>
<p>本関数は <code><a href="regex_error.html">regex_error</a></code> を送出する可能性がある。<br />
もしそのような<a class="cpprefjp-defined-word" data-desc="問題が発生したときに、現在実行位置を過去に通過・記録した位置に戻し、文脈情報を添えて紐づけられた処理(例外ハンドラー)を呼び出す仕組み。またはその事態">例外</a> <code>e</code> が送出された場合、 <code>e.<a href="regex_error/code.html">code</a>()</code> は <code><a href="regex_constants/error_type.html">regex_constants::error_complexity</a></code> か <code><a href="regex_constants/error_type.html">regex_constants::error_stack</a></code> のいずれかである。</p>
<h2>備考</h2>
<p><code><a href="match_results.html">match_results</a></code> オブジェクトを引数に取る形式の場合、そのオブジェクトは引数で指定した検索対象文字列へのイテレータを保持する。<br />
このため、検索対象文字列は本関数を呼び出した後も <code><a href="match_results.html">match_results</a></code> オブジェクトを使用し終わるまで破棄されないようにする必要がある。<br />
従って、(3) の形式に渡す引数 <code>s</code> に一時オブジェクトを指定することはほぼ間違いなくプログラミング上のエラーを意味する。<br />
(4) の形式が <code>deleted</code> として C++14 で追加された理由は、このような事態をコンパイル時に検出するためである。</p>
<p><div class="yata" id="bdda39b992b80ccd257a314aa451c81ca6a8fc64"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html">&lt;iostream&gt;</a></span>
<span class="cp">#include <a href="../iterator.html">&lt;iterator&gt;</a></span>
<span class="cp">#include <a href="../list.html">&lt;list&gt;</a></span>
<span class="cp">#include <a href="../regex.html">&lt;regex&gt;</a></span>
<span class="cp">#include <a href="../string.html">&lt;string&gt;</a></span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span>
<span class="p">{</span>
<span class="w">  </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ios/boolalpha.html">std::boolalpha</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (1) の形式</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../list/list.html">std::list</a></span><span class="o">&lt;</span><span class="kt">char</span><span class="o">&gt;</span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="sc">'a'</span><span class="p">,</span><span class="w"> </span><span class="sc">'b'</span><span class="p">,</span><span class="w"> </span><span class="sc">'c'</span><span class="p">,</span><span class="w"> </span><span class="sc">'1'</span><span class="p">,</span><span class="w"> </span><span class="sc">'2'</span><span class="p">,</span><span class="w"> </span><span class="sc">'3'</span><span class="p">,</span><span class="w"> </span><span class="sc">'d'</span><span class="p">,</span><span class="w"> </span><span class="sc">'e'</span><span class="p">,</span><span class="w"> </span><span class="sc">'f'</span><span class="w"> </span><span class="p">};</span>
<span class="w">    </span><span class="n"><a href="match_results.html">std::match_results</a></span><span class="o">&lt;</span><span class="n"><a href="../list/list.html">std::list</a></span><span class="o">&lt;</span><span class="kt">char</span><span class="o">&gt;::</span><span class="n">const_iterator</span><span class="o">&gt;</span><span class="w"> </span><span class="n">m</span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(1) "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="n"><a href="../iterator/begin.html">std::begin</a></span><span class="p">(</span><span class="n">s</span><span class="p">),</span><span class="w"> </span><span class="n"><a href="../iterator/end.html">std::end</a></span><span class="p">(</span><span class="n">s</span><span class="p">),</span><span class="w"> </span><span class="n">m</span><span class="p">,</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"str = '"</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="match_results/str.html">m.str()</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"', position = "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="match_results/position.html">m.position()</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (2) の形式</span>
<span class="w">    </span><span class="n"><a href="match_results.html">std::cmatch</a></span><span class="w"> </span><span class="n">m</span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(2) "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="s">"abc123def"</span><span class="p">,</span><span class="w"> </span><span class="n">m</span><span class="p">,</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"str = '"</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="match_results/str.html">m.str()</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"', position = "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="match_results/position.html">m.position()</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (3) の形式</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"abc123def"</span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="match_results.html">std::smatch</a></span><span class="w"> </span><span class="n">m</span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(3) "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="n">s</span><span class="p">,</span><span class="w"> </span><span class="n">m</span><span class="p">,</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"str = '"</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="match_results/str.html">m.str()</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"', position = "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="match_results/position.html">m.position()</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (4) の形式（コメントアウトを外すと C++14 ではエラーになる）</span>
<span class="w">    </span><span class="c1">//<a href="match_results.html">std::smatch</a> m;</span>
<span class="w">    </span><span class="c1">//<a href="../iostream/cout.html">std::cout</a> &lt;&lt; "(4) " &lt;&lt; <span style="color:#ff0000">std::regex_search</span>(<a href="../string/basic_string.html">std::string</a>("abc123def"), m, <a href="basic_regex.html">std::regex</a>("\\d+")) &lt;&lt; <a href="../ostream/endl.html">std::endl</a>;</span>
<span class="w">    </span><span class="c1">//<a href="../iostream/cout.html">std::cout</a> &lt;&lt; "str = '" &lt;&lt; <a href="match_results/str.html">m.str()</a> &lt;&lt; "', position = " &lt;&lt; <a href="match_results/position.html">m.position()</a> &lt;&lt; <a href="../ostream/endl.html">std::endl</a>;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (5) の形式</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../list/list.html">std::list</a></span><span class="o">&lt;</span><span class="kt">char</span><span class="o">&gt;</span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="sc">'a'</span><span class="p">,</span><span class="w"> </span><span class="sc">'b'</span><span class="p">,</span><span class="w"> </span><span class="sc">'c'</span><span class="p">,</span><span class="w"> </span><span class="sc">'1'</span><span class="p">,</span><span class="w"> </span><span class="sc">'2'</span><span class="p">,</span><span class="w"> </span><span class="sc">'3'</span><span class="p">,</span><span class="w"> </span><span class="sc">'d'</span><span class="p">,</span><span class="w"> </span><span class="sc">'e'</span><span class="p">,</span><span class="w"> </span><span class="sc">'f'</span><span class="w"> </span><span class="p">};</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(5) "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="n"><a href="../iterator/begin.html">std::begin</a></span><span class="p">(</span><span class="n">s</span><span class="p">),</span><span class="w"> </span><span class="n"><a href="../iterator/end.html">std::end</a></span><span class="p">(</span><span class="n">s</span><span class="p">),</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (6) の形式</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(6) "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="s">"abc123def"</span><span class="p">,</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (7) の形式、その１</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"abc123def"</span><span class="p">;</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(7)-1 "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="n">s</span><span class="p">,</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="w">  </span><span class="p">{</span>
<span class="w">    </span><span class="c1">// (7) の形式、その２（C++14 でもエラーにならない）</span>
<span class="w">    </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="s">"(7)-2 "</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::regex_search</span></span><span class="p">(</span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="p">(</span><span class="s">"abc123def"</span><span class="p">),</span><span class="w"> </span><span class="n"><a href="basic_regex.html">std::regex</a></span><span class="p">(</span><span class="s">"</span><span class="se">\\</span><span class="s">d+"</span><span class="p">))</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="w">  </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
<h3>出力</h3>
<p><pre><code>(1) true
str = '123', position = 3
str = '123', position = 3
str = '123', position = 3
</code></pre></p>
<h2>バージョン</h2>
<h3>言語</h3>
<li>C++11</li>
<h3>処理系</h3>
<li><a href="../../implementation.html#clang">Clang</a>: 3.0 <span aria-label="検証済" role="img" title="検証済">✅</span>, 3.1 <span aria-label="検証済" role="img" title="検証済">✅</span>, 3.2 <span aria-label="検証済" role="img" title="検証済">✅</span>, 3.3 <span aria-label="検証済" role="img" title="検証済">✅</span>, 3.4 <span aria-label="検証済" role="img" title="検証済">✅</span>, 3.5 <span aria-label="検証済" role="img" title="検証済">✅</span>, 3.6 <span aria-label="検証済" role="img" title="検証済">✅</span></li>
<li><a href="../../implementation.html#gcc">GCC</a>: 4.9.0 <span aria-label="検証済" role="img" title="検証済">✅</span>, 4.9.1 <span aria-label="検証済" role="img" title="検証済">✅</span>, 4.9.2 <span aria-label="検証済" role="img" title="検証済">✅</span>, 5.0.0 <span aria-label="検証済" role="img" title="検証済">✅</span></li>
<li><a href="../../implementation.html#icc">ICC</a>: ??</li>
<li><a href="../../implementation.html#visual_cpp">Visual C++</a>: ??</li>
<h3>備考</h3>
<p>Clang(libc++) では、3.4 までは (4) の形式は存在しない。<br />
GCC(libstdc++) では、4.9.2 までは (4) の形式は存在しない。</p>
<h2>参照</h2>
<li><a href="https://cpplover.blogspot.jp/2015/01/c-stdregex.html" target="_blank">C++の正規表現ライブラリ: std::regex | 本の虫</a></li>
</ul></div>
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