update automatically

Author: cpprefjp-autoupdate

lang/cpp26/trivial_unions.html

@@ -188,8 +188,8 @@
 
     <p class="text-right"><small>
       最終更新日時(UTC):
-      <span itemprop="datePublished" content="2026-04-06T09:01:01">
-        2026年04月06日 09時01分01秒
+      <span itemprop="datePublished" content="2026-04-06T09:09:22">
+        2026年04月06日 09時09分22秒
       </span>
       <br/>
       <span itemprop="author" itemscope itemtype="http://schema.org/Person">
@@ -220,23 +220,23 @@ <h1 itemprop="name"><span class="token">共用体の特殊メンバ関数のト
 <h2>概要</h2>
 <p>C++26では、共用体 (<code>union</code>) のデフォルトコンストラクタとデストラクタの規則を変更し、より多くの場合にトリビアル (trivial) となるようにする。</p>
 <p>これにより、非トリビアルな型のメンバをもつ共用体を未初期化のストレージとして<code>constexpr</code>の文脈で使用できるようになる。</p>
-<p><div class="codehilite"><pre><span></span><code><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc">T</span><span class="p">,</span><span class="w"> </span><span class="kt">size_t</span><span class="w"> </span><span class="n">N</span><span class="o">&gt;</span>
+<p><div class="codehilite"><pre><span></span><code><span class="k">template</span><span class="w"> </span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc">T</span><span class="p">,</span><span class="w"> </span><span class="n"><a href="../../reference/cstddef/size_t.html">std::size_t</a></span><span class="w"> </span><span class="n">N</span><span class="o">&gt;</span>
 <span class="k">struct</span><span class="w"> </span><span class="nc">FixedVector</span><span class="w"> </span><span class="p">{</span>
-<span class="w">    </span><span class="k">union</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="n">T</span><span class="w"> </span><span class="n">storage</span><span class="p">[</span><span class="n">N</span><span class="p">];</span><span class="w"> </span><span class="p">};</span>
-<span class="w">    </span><span class="kt">size_t</span><span class="w"> </span><span class="n">size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
+<span class="w">  </span><span class="k">union</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="n">T</span><span class="w"> </span><span class="n">storage</span><span class="p">[</span><span class="n">N</span><span class="p">];</span><span class="w"> </span><span class="p">};</span>
+<span class="w">  </span><span class="n"><a href="../../reference/cstddef/size_t.html">std::size_t</a></span><span class="w"> </span><span class="n">size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
 
-<span class="w">    </span><span class="c1">// C++23まで: unionのコンストラクタ/デストラクタが削除されるためコンパイルエラー</span>
-<span class="w">    </span><span class="c1">// C++26: OK。unionのコンストラクタ/デストラクタはトリビアル</span>
-<span class="w">    </span><span class="k">constexpr</span><span class="w"> </span><span class="n">FixedVector</span><span class="p">()</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">default</span><span class="p">;</span>
+<span class="w">  </span><span class="c1">// C++23まで: unionのコンストラクタ/デストラクタが削除されるためコンパイルエラー</span>
+<span class="w">  </span><span class="c1">// C++26: OK。unionのコンストラクタ/デストラクタはトリビアル</span>
+<span class="w">  </span><span class="k">constexpr</span><span class="w"> </span><span class="n">FixedVector</span><span class="p">()</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">default</span><span class="p">;</span>
 
-<span class="w">    </span><span class="k">constexpr</span><span class="w"> </span><span class="o">~</span><span class="n">FixedVector</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
-<span class="w">        </span><span class="n">std</span><span class="o">::</span><span class="n">destroy</span><span class="p">(</span><span class="n">storage</span><span class="p">,</span><span class="w"> </span><span class="n">storage</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">size</span><span class="p">);</span>
-<span class="w">    </span><span class="p">}</span>
+<span class="w">  </span><span class="k">constexpr</span><span class="w"> </span><span class="o">~</span><span class="n">FixedVector</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
+<span class="w">    </span><span class="n"><a href="../../reference/memory/destroy.html">std::destroy</a></span><span class="p">(</span><span class="n">storage</span><span class="p">,</span><span class="w"> </span><span class="n">storage</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">size</span><span class="p">);</span>
+<span class="w">  </span><span class="p">}</span>
 
-<span class="w">    </span><span class="k">constexpr</span><span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">push_back</span><span class="p">(</span><span class="n">T</span><span class="w"> </span><span class="k">const</span><span class="o">&amp;</span><span class="w"> </span><span class="n">v</span><span class="p">)</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="p">{</span>
-<span class="w">        </span><span class="n">std</span><span class="o">::</span><span class="n">construct_at</span><span class="p">(</span><span class="n">storage</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">size</span><span class="p">,</span><span class="w"> </span><span class="n">v</span><span class="p">);</span>
-<span class="w">        </span><span class="o">++</span><span class="n">size</span><span class="p">;</span>
-<span class="w">    </span><span class="p">}</span>
+<span class="w">  </span><span class="k">constexpr</span><span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">push_back</span><span class="p">(</span><span class="n">T</span><span class="w"> </span><span class="k">const</span><span class="o">&amp;</span><span class="w"> </span><span class="n">v</span><span class="p">)</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="p">{</span>
+<span class="w">    </span><span class="n"><a href="../../reference/memory/construct_at.html">std::construct_at</a></span><span class="p">(</span><span class="n">storage</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">size</span><span class="p">,</span><span class="w"> </span><span class="n">v</span><span class="p">);</span>
+<span class="w">    </span><span class="o">++</span><span class="n">size</span><span class="p">;</span>
+<span class="w">  </span><span class="p">}</span>
 <span class="p">};</span>
 </code></pre></div>
 </p>

rss.xml

@@ -2,10 +2,69 @@
 <feed xmlns="http://www.w3.org/2005/Atom">
   <title>cpprefjp - C++日本語リファレンス</title>
   <link href="https://cpprefjp.github.io" />
-  <updated>2026-04-06T09:05:20.050805</updated>
-  <id>557a45f4-f7f4-4fdf-a643-41a71bcd6921</id>
+  <updated>2026-04-06T09:13:46.290561</updated>
+  <id>06005be6-4405-46bc-a080-76e093299817</id>
 
 
+    <entry>
+      <title>共用体の特殊メンバ関数のトリビアル化 [P3074R7] -- インデントを修正</title>
+      <link href="https://cpprefjp.github.io/lang/cpp26/trivial_unions.html"/>
+      <id>321f8d140117e4fa3530ed309c7233aaa4598df3:lang/cpp26/trivial_unions.md</id>
+      <updated>2026-04-06T18:09:22+09:00</updated>
+      
+        <summary type="html">&lt;pre&gt;&lt;code&gt;diff --git a/lang/cpp26/trivial_unions.md b/lang/cpp26/trivial_unions.md
+index bca9abfe9..418c69d5a 100644
+--- a/lang/cpp26/trivial_unions.md
++++ b/lang/cpp26/trivial_unions.md
+@@ -15,25 +15,27 @@ C++26では、共用体 (`union`) のデフォルトコンストラクタとデ
+ これにより、非トリビアルな型のメンバをもつ共用体を未初期化のストレージとして`constexpr`の文脈で使用できるようになる。
+ 
+ ```cpp
+-template &amp;lt;typename T, size_t N&amp;gt;
++template &amp;lt;typename T, std::size_t N&amp;gt;
+ struct FixedVector {
+-    union { T storage[N]; };
+-    size_t size = 0;
++  union { T storage[N]; };
++  std::size_t size = 0;
+ 
+-    // C++23まで: unionのコンストラクタ/デストラクタが削除されるためコンパイルエラー
+-    // C++26: OK。unionのコンストラクタ/デストラクタはトリビアル
+-    constexpr FixedVector() = default;
++  // C++23まで: unionのコンストラクタ/デストラクタが削除されるためコンパイルエラー
++  // C++26: OK。unionのコンストラクタ/デストラクタはトリビアル
++  constexpr FixedVector() = default;
+ 
+-    constexpr ~FixedVector() {
+-        std::destroy(storage, storage + size);
+-    }
++  constexpr ~FixedVector() {
++    std::destroy(storage, storage + size);
++  }
+ 
+-    constexpr auto push_back(T const&amp;amp; v) -&amp;gt; void {
+-        std::construct_at(storage + size, v);
+-        ++size;
+-    }
++  constexpr auto push_back(T const&amp;amp; v) -&amp;gt; void {
++    std::construct_at(storage + size, v);
++    ++size;
++  }
+ };
+ ```
++* std::construct_at[link /reference/memory/construct_at.md]
++* std::destroy[link /reference/memory/destroy.md]
+ 
+ 
+ ## 仕様
+&lt;/code&gt;&lt;/pre&gt;</summary>
+      
+      <author>
+        <name>Akira Takahashi</name>
+        <email>faithandbrave@gmail.com</email>
+      </author>
+    </entry>
+  
     <entry>
       <title>コンパイラの実装状況 -- C++26: 「共用体の特殊メンバ関数のトリビアル化」を追加 (close #1417)</title>
       <link href="https://cpprefjp.github.io/implementation-status.html"/>
@@ -14004,29 +14063,6 @@ index 000000000..cbd2fe89e
 +
 +## 参照
 +- [P3533R2 constexpr virtual inheritance](https://open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3533r2.html)
-&lt;/code&gt;&lt;/pre&gt;</summary>
-      
-      <author>
-        <name>Akira Takahashi</name>
-        <email>faithandbrave@gmail.com</email>
-      </author>
-    </entry>
-  
-    <entry>
-      <title>main関数をグローバルモジュールに関連付けることを許可 [P3618R0] -- 関係ない参照文書を削除</title>
-      <link href="https://cpprefjp.github.io/lang/cpp26/allow_attaching_main_to_the_global_module.html"/>
-      <id>683ebcdeaef3c9e6e79b85bf0176929017739a97:lang/cpp26/allow_attaching_main_to_the_global_module.md</id>
-      <updated>2026-04-06T09:53:12+09:00</updated>
-      
-        <summary type="html">&lt;pre&gt;&lt;code&gt;diff --git a/lang/cpp26/allow_attaching_main_to_the_global_module.md b/lang/cpp26/allow_attaching_main_to_the_global_module.md
-index 72fc86986..8c1664e1d 100644
---- a/lang/cpp26/allow_attaching_main_to_the_global_module.md
-+++ b/lang/cpp26/allow_attaching_main_to_the_global_module.md
-@@ -80,4 +80,3 @@ P3422R1では、モジュール内で定義された`main()`関数を暗黙的
- 
- ## 参照
- - [P3618R0 Allow attaching main to the global module](https://open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3618r0.html)
--- [P3422R1 Fixing Modules for Test](https://open-std.org/jtc1/sc22/wg21/docs/papers/2025/p3422r1.html)
 &lt;/code&gt;&lt;/pre&gt;</summary>
 
       <author>

sitemap.xml

@@ -1970,7 +1970,7 @@
 
     <url>
       <loc>https://cpprefjp.github.io/lang/cpp26/trivial_unions.html</loc>
-      <lastmod>2026-04-06T18:01:01+09:00</lastmod>
+      <lastmod>2026-04-06T18:09:22+09:00</lastmod>
       <changefreq>daily</changefreq>
       <priority>0.7</priority>
     </url>