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‎reference/contracts.html

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<p class="text-right"><small>
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最終更新日時(UTC):
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<span itemprop="datePublished" content="2025-05-08T04:21:32">
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2025年05月08日 04時21分32秒
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<span itemprop="datePublished" content="2025-05-09T02:48:47">
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2025年05月09日 02時48分47秒
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<td>C++26</td>
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<tr>
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<td><code><span href="https://cpprefjp.github.io/reference/contracts/detection_mode.md.nolink">detection_mode</span></code></td>
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<td><code><a href="contracts/detection_mode.html">detection_mode</a></code></td>
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<td>契約違反の検出モード(enum)</td>
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<td>C++26</td>
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‎reference/contracts/detection_mode.html

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最終更新日時(UTC):
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<span itemprop="datePublished" content="2025-05-09T02:48:47">
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2025年05月09日 02時48分47秒
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<span itemprop="name">rotarymars</span>
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が更新
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<span class="fa fa-fw fa-clock-o fa-flip-horizontal"></span>履歴
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<div class="identifier-type">enum</div><div class="header">&lt;contracts&gt;</div><h1 itemprop="name"><span class="namespace" title="namespace std::contracts">std::contracts::</span><span class="token">detection_mode</span><span class="cpp cpp26" title="C++26で追加">(C++26)</span></h1>
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<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span> <span class="n">std</span><span class="o">::</span><span class="n">contracts</span> <span class="p">{</span>
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<span class="k">enum</span> <span class="k">class</span> <span class="nc">detection_mode</span> <span class="o">:</span> <span class="n">unspecified</span> <span class="p">{</span>
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<span class="n">predicate_false</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span>
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<span class="n">evaluation_exception</span> <span class="o">=</span> <span class="mi">2</span>
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<span class="p">}</span>
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<span class="p">}</span>
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</code></pre></div>
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</p>
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<h2>概要</h2>
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<p>契約違反がどのような仕組みでその違反が認識されたかを表す列挙型。</p>
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<h3>各列挙子の意味</h3>
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<table border="1" bordercolor="#888" style="border-collapse:collapse">
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<thead>
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<th>列挙子</th>
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<th>値</th>
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<th>意味</th>
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</thead>
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<tbody>
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<td>predicate_false</td>
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<td>1</td>
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<td>契約の<a class="cpprefjp-defined-word" data-desc="boolを返す関数・関数オブジェクト。predicate">述語</a>が評価され、falseを返す、もしくは評価をするとfalseを返す</td>
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</tr>
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<td>evaluation_exception</td>
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<td>2</td>
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<td>評価中に<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>が投げられ、キャッチされずに逸脱した</td>
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<h2>バージョン</h2>
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<h3>言語</h3>
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<ul>
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<li>C++26</li>
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</ul>
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<h3>処理系</h3>
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<ul>
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<li><a href="../../implementation.html#clang">Clang</a>: ?</li>
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<li><a href="../../implementation.html#gcc">GCC</a>: ?</li>
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<li><a href="../../implementation.html#icc">ICC</a>: ?</li>
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<li><a href="../../implementation.html#visual_cpp">Visual C++</a>: ?</li>
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<h2>関連項目</h2>
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<ul>
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<li><a href="../../lang/future/contract-based_programming.html">契約に基づくプログラミング</a></li>
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<li><a href="../../lang/cpp26/contracts.html">契約プログラミング</a></li>
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</ul>
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<h2>参照</h2>
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<ul>
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<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0542r5.html" target="_blank">P0542R5 Support for contract based programming in C++</a></li>
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