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‎reference/execution/execution.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="2025-04-12T16:08:34">
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2025年04月12日 16時08分34秒
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<span itemprop="datePublished" content="2025-04-13T05:48:15">
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2025年04月13日 05時48分15秒
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<td><code><span href="https://cpprefjp.github.io/reference/execution/execution/receiver.md.nolink">execution::receiver</span></code></td>
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<td>Receiver (concept)</td>
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<td><code><a href="execution/receiver.html">execution::receiver</a></code></td>
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<td>Receiver型 (concept)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><span href="https://cpprefjp.github.io/reference/execution/execution/receiver_of.md.nolink">execution::receiver_of</span></code></td>
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<td>完了ハンドラ指定Receiver (concept)</td>
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<td><code><a href="execution/receiver_of.html">execution::receiver_of</a></code></td>
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<td>完了シグネチャ集合を持つReceiver (concept)</td>
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<td>C++26</td>
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‎reference/execution/execution/receiver.html‎

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<div class="identifier-type">concept</div><div class="header">&lt;execution&gt;</div><h1 itemprop="name"><span class="namespace" title="namespace std::execution">std::execution::</span><span class="token">receiver</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">execution</span> <span class="p">{</span>
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<span class="k">template</span><span class="o">&lt;</span><span class="k">class</span> <span class="nc">Rcvr</span><span class="o">&gt;</span>
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<span class="n">concept</span> <span class="n">receiver</span> <span class="o">=</span>
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<span class="n"><a href="../../concepts/derived_from.html">derived_from</a></span><span class="o">&lt;</span><span class="k">typename</span> <span class="n"><a href="../../type_traits/remove_cvref.html">remove_cvref_t</a></span><span class="o">&lt;</span><span class="n">Rcvr</span><span class="o">&gt;::</span><span class="n">receiver_concept</span><span class="p">,</span> <span class="n">receiver_t</span><span class="o">&gt;</span> <span class="o">&amp;&amp;</span>
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<span class="n">requires</span><span class="p">(</span><span class="k">const</span> <span class="n"><a href="../../type_traits/remove_cvref.html">remove_cvref_t</a></span><span class="o">&lt;</span><span class="n">Rcvr</span><span class="o">&gt;&amp;</span> <span class="n">rcvr</span><span class="p">)</span> <span class="p">{</span>
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<span class="p">{</span> <span class="n"><span href="https://cpprefjp.github.io/reference/execution/execution/get_env.md.nolink">get_env</span></span><span class="p">(</span><span class="n">rcvr</span><span class="p">)</span> <span class="p">}</span> <span class="o">-&gt;</span> <span class="n"><span href="https://cpprefjp.github.io/reference/execution/execution/queryable.md.nolink">queryable</span></span><span class="p">;</span>
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<span class="p">}</span> <span class="o">&amp;&amp;</span>
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<span class="n"><a href="../../concepts/move_constructible.html">move_constructible</a></span><span class="o">&lt;</span><span class="n"><a href="../../type_traits/remove_cvref.html">remove_cvref_t</a></span><span class="o">&lt;</span><span class="n">Rcvr</span><span class="o">&gt;&gt;</span> <span class="o">&amp;&amp;</span>
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<span class="n"><a href="../../concepts/constructible_from.html">constructible_from</a></span><span class="o">&lt;</span><span class="n"><a href="../../type_traits/remove_cvref.html">remove_cvref_t</a></span><span class="o">&lt;</span><span class="n">Rcvr</span><span class="o">&gt;</span><span class="p">,</span> <span class="n">Rcvr</span><span class="o">&gt;</span><span class="p">;</span>
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<span class="k">struct</span> <span class="n">receiver_t</span> <span class="p">{};</span> <span class="c1">// タグ型</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><code>receiver</code>は、型<code>Rcvr</code>がReceiver型の要件を満たすことを表すコンセプトである。</p>
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<p><code>receiver_t</code>をメンバ型<code>Rcvr::receiver_concept</code>として定義するクラス型はReceiverとみなせる。</p>
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<h2>モデル</h2>
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<p><code>final</code>指定されたクラス型は<code>receiver</code>のモデルではない。</p>
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<h2>例</h2>
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<p><div class="yata" id="127a537143c920ae6a2832e1b6b3f133f17637d1"><div class="codehilite"><pre><span></span><code><span class="cp">#include</span> <span class="cpf"><a href="../../execution.html">&lt;execution&gt;</a></span><span class="cp"></span>
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<span class="k">namespace</span> <span class="n">ex</span> <span class="o">=</span> <span class="n">std</span><span class="o">::</span><span class="n">execution</span><span class="p">;</span>
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<span class="k">struct</span> <span class="n">SinkReceiver</span> <span class="p">{</span>
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<span class="k">using</span> <span class="n">receiver_concept</span> <span class="o">=</span> <span class="n">ex</span><span class="o">::</span><span class="n">receiver_t</span><span class="p">;</span>
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<span class="kt">void</span> <span class="nf">set_value</span><span class="p">(</span><span class="k">auto</span><span class="o">&amp;&amp;</span><span class="p">...)</span> <span class="k">noexcept</span> <span class="p">{}</span>
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<span class="kt">void</span> <span class="nf">set_error</span><span class="p">(</span><span class="k">auto</span><span class="o">&amp;&amp;</span><span class="p">)</span> <span class="k">noexcept</span> <span class="p">{}</span>
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<span class="kt">void</span> <span class="nf">set_stopped</span><span class="p">()</span> <span class="k">noexcept</span> <span class="p">{}</span>
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<span class="p">};</span>
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<span class="kt">int</span> <span class="nf">main</span><span class="p">()</span>
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<span class="p">{</span>
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<span class="k">static_assert</span><span class="p">(</span><span class="n"><span style="color:#ff0000">ex::receiver</span></span><span class="o">&lt;</span><span class="n">SinkReceiver</span><span class="o">&gt;</span><span class="p">);</span>
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<span class="p">}</span>
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</code></pre></div>
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</div></p>
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<h3>出力</h3>
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<p><pre><code></code></pre></p>
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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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</ul>
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<h2>関連項目</h2>
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<ul>
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<li><code><a href="receiver_of.html">execution::receiver_of</a></code></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="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2300r10.html" target="_blank">P2300R10 <code>std::execution</code></a></li>
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