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‎reference/mdspan/aligned_accessor.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="2024-12-20T08:46:04">
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2024年12月20日 08時46分04秒
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<span itemprop="datePublished" content="2024-12-22T07:03:05">
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2024年12月22日 07時03分05秒
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<td><code><span href="https://cpprefjp.github.io/reference/mdspan/aligned_accessor/op_constructor.md.nolink">(constructor)</span></code></td>
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<td><code><a href="aligned_accessor/op_constructor.html">(constructor)</a></code></td>
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<td>コンストラクタ</td>
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<td>C++26</td>
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<td>C++26</td>
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<td><code><span href="https://cpprefjp.github.io/reference/mdspan/aligned_accessor/op_default_accessor.md.nolink">operator default_accessor</span></code></td>
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<td><code><a href="aligned_accessor/op_default_accessor.html">operator default_accessor</a></code></td>
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<td><code><a href="default_accessor.html">default_accessor</a></code>型への変換演算子</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/mdspan/aligned_accessor/access.md.nolink">access</span></code></td>
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<td><code><a href="aligned_accessor/access.html">access</a></code></td>
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<td>指定オフセット位置にある要素へアクセスする</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/mdspan/aligned_accessor/offset.md.nolink">offset</span></code></td>
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<td><code><a href="aligned_accessor/offset.html">offset</a></code></td>
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<td>指定オフセット位置のハンドルを取得する</td>
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<td>C++26</td>
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‎reference/mdspan/aligned_accessor/access.html‎

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最終更新日時(UTC):
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<span itemprop="datePublished" content="2024-12-22T07:03:05">
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2024年12月22日 07時03分05秒
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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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<span class="fa fa-fw fa-pencil"></span>編集
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<div class="identifier-type">function</div><div class="header">&lt;mdspan&gt;</div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="class" title="class aligned_accessor">aligned_accessor::</span><span class="token">access</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">constexpr</span> <span class="n">reference</span> <span class="nf">access</span><span class="p">(</span><span class="n">data_handle_type</span> <span class="n">p</span><span class="p">,</span> <span class="kt">size_t</span> <span class="n">i</span><span class="p">)</span> <span class="k">const</span> <span class="k">noexcept</span><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>指定オフセット位置にある要素へアクセスする。</p>
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<h2>事前条件</h2>
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<ul>
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<li>半開区間<code>[0, i+1)</code>が有効な範囲であり、かつ</li>
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<li><code><a href="../../memory/is_sufficiently_aligned.html">is_sufficiently_aligned</a>&lt;byte_alignment&gt;(p)</code>が<code>true</code>であること。</li>
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</ul>
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<h2>効果</h2>
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<p><code>return <a href="../../memory/assume_aligned.html">assume_aligned</a>&lt;byte_alignment&gt;(p)[i];</code>と等価</p>
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<h2>例外</h2>
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<p>投げない</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>参照</h2>
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<ul>
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<li><a href="https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2897r7.html" target="_blank">P2897R7 <code>aligned_accessor</code>: An mdspan accessor expressing pointer over-alignment</a></li>
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