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reference/format/formattable.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="2026-05-30T08:33:15">
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2026年05月30日 08時33分15秒
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<span itemprop="datePublished" content="2026-05-30T12:10:14">
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2026年05月30日 12時10分14秒
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</span>
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<br/>
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<span itemprop="author" itemscope itemtype="http://schema.org/Person">
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<span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="n">Formatter</span><span class="o">&amp;</span><span class="w"> </span><span class="n">cf</span><span class="p">,</span>
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<span class="w"> </span><span class="n">T</span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">t</span><span class="p">,</span>
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<span class="w"> </span><span class="n">Context</span><span class="w"> </span><span class="n">fc</span><span class="p">,</span>
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<span class="w"> </span><span class="n"><a href="basic_format_parse_context.html">basic_format_parse_context</a></span><span class="o">&lt;</span><span class="n">charT</span><span class="o">&gt;</span><span class="w"> </span><span class="n">pc</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
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<span class="w"> </span><span class="n"><a href="basic_format_parse_context.html">basic_format_parse_context</a></span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc">Context</span><span class="o">::</span><span class="n">char_type</span><span class="o">&gt;</span><span class="w"> </span><span class="n">pc</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
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<span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="n">f</span><span class="p">.</span><span class="n">parse</span><span class="p">(</span><span class="n">pc</span><span class="p">)</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="n"><a href="../concepts/same_as.html">same_as</a></span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc">decltype</span><span class="p">(</span><span class="n">pc</span><span class="p">)</span><span class="o">::</span><span class="n">iterator</span><span class="o">&gt;</span><span class="p">;</span>
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<span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="n">cf</span><span class="p">.</span><span class="n">format</span><span class="p">(</span><span class="n">t</span><span class="p">,</span><span class="w"> </span><span class="n">fc</span><span class="p">)</span><span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="n"><a href="../concepts/same_as.html">same_as</a></span><span class="o">&lt;</span><span class="k">typename</span><span class="w"> </span><span class="nc">Context</span><span class="o">::</span><span class="n">iterator</span><span class="o">&gt;</span><span class="p">;</span>
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<span class="w"> </span><span class="p">};</span>

rss.xml

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<feed xmlns="http://www.w3.org/2005/Atom">
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<title>cpprefjp - C++日本語リファレンス</title>
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<link href="https://cpprefjp.github.io" />
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<updated>2026-05-30T08:37:06.468480</updated>
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<id>8a09c412-80c5-4010-98c5-c2eed651027a</id>
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<updated>2026-05-30T12:14:34.747806</updated>
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<id>02c30fcf-6624-4281-a2f4-0575ea06a7c6</id>
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<entry>
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<title>formattable -- Update formattable.md</title>
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<link href="https://cpprefjp.github.io/reference/format/formattable.html"/>
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<id>7884e2f3d9bb5a283294f0c17b4ebe930ccd0b75:reference/format/formattable.md</id>
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<updated>2026-05-30T21:10:14+09:00</updated>
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<summary type="html">&lt;pre&gt;&lt;code&gt;diff --git a/reference/format/formattable.md b/reference/format/formattable.md
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index c71e840cf..e4ea4fb04 100644
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--- a/reference/format/formattable.md
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+++ b/reference/format/formattable.md
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@@ -16,7 +16,7 @@ namespace std {
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const Formatter&amp;amp; cf,
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T&amp;amp;&amp;amp; t,
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Context fc,
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- basic_format_parse_context&amp;lt;charT&amp;gt; pc) {
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+ basic_format_parse_context&amp;lt;typename Context::char_type&amp;gt; pc) {
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{ f.parse(pc) } -&amp;gt; same_as&amp;lt;typename decltype(pc)::iterator&amp;gt;;
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{ cf.format(t, fc) } -&amp;gt; same_as&amp;lt;typename Context::iterator&amp;gt;;
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};
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&lt;/code&gt;&lt;/pre&gt;</summary>
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<author>
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<name>Tetsuro Matsumura</name>
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<email>matsumura.t.lab@gmail.com</email>
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</author>
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</entry>
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<entry>
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<title>formattable -- Update formattable.md</title>
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<link href="https://cpprefjp.github.io/reference/format/formattable.html"/>
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</author>
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</entry>
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<entry>
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<title>is_enumerable_type -- is_enumerable_type : 列挙可能型になる条件を修正</title>
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<link href="https://cpprefjp.github.io/reference/meta/is_enumerable_type.html"/>
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<id>d3cf0fe62bf38778f2d9dc592206b38dec7ea353:reference/meta/is_enumerable_type.md</id>
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<updated>2026-05-25T16:34:33+09:00</updated>
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<summary type="html">&lt;pre&gt;&lt;code&gt;diff --git a/reference/meta/is_enumerable_type.md b/reference/meta/is_enumerable_type.md
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index 9aca8d338..c1a09bc25 100644
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--- a/reference/meta/is_enumerable_type.md
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+++ b/reference/meta/is_enumerable_type.md
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@@ -12,22 +12,38 @@ namespace std::meta {
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* info[link info.md]
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## 概要
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-型が列挙可能型であるかを判定する。列挙可能型とは、[`enumerators_of()`](enumerators_of.md)で列挙子を取得できる列挙型である。
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+型が列挙可能型であるかを判定する。
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+
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+列挙可能型とは、次のいずれかを満たす型である:
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+
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+- クラス型であり、完全型である
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+- 列挙型であり、その宣言に到達可能である([`enumerators_of()`](enumerators_of.md)で列挙子を取得できる)
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+ - ただし、その列挙型の宣言内では列挙可能型にならない
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## 戻り値
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-`r`が列挙可能な列挙型を表す場合に`true`を返す。
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+`r`が列挙可能型を表す場合に`true`を返す。
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## 例
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```cpp example
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#include &amp;lt;meta&amp;gt;
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-enum Color { red, green, blue };
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+enum class Color;
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+static_assert(!std::meta::is_enumerable_type(^^Color));
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+enum class Color { red, green, blue };
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+static_assert( std::meta::is_enumerable_type(^^Color));
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-int main() {
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- static_assert(std::meta::is_enumerable_type(^^Color));
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-}
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+class S {};
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+static_assert( std::meta::is_enumerable_type(^^S)); // 完全なクラス型も列挙可能型
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+
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+enum class E {
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+ FALSE, TRUE,
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+ A = std::meta::is_enumerable_type(^^E) ? TRUE : FALSE
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+};
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+static_assert(E::A == E::FALSE); // 列挙型自身の宣言内では、列挙可能型にならない
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+
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+int main() {}
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```
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### 出力
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&lt;/code&gt;&lt;/pre&gt;</summary>
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<author>
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<name>Raclamusi</name>
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<email>raclamusi@gmail.com</email>
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</author>
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</entry>
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</feed>

sitemap.xml

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<url>
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<loc>https://cpprefjp.github.io/reference/format/formattable.html</loc>
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<lastmod>2026-05-30T17:33:15+09:00</lastmod>
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<lastmod>2026-05-30T21:10:14+09:00</lastmod>
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<changefreq>daily</changefreq>
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<priority>0.7</priority>
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