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202+ 最終更新日時(UTC):
203+ < span itemprop ="datePublished " content ="2025-04-30T01:39:58 ">
204+ 2025年04月30日 01時39分58秒
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208+ < span itemprop ="name "> yoh</ span >
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210+ が更新
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219+ < span class ="fa fa-fw fa-pencil "> </ span > 編集
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226+
227+ < div class ="identifier-type "> function template</ div > < div class ="header "> <execution></ div > < h1 itemprop ="name "> < span class ="namespace " title ="namespace std::execution "> std::execution::</ span > < span class ="token "> completion-domain</ span > < span class ="cpp cpp26 " title ="C++26で追加 "> (C++26)</ span > </ h1 >
228+ < div itemprop ="articleBody "> < p > < div class ="codehilite "> < pre > < span > </ span > < code > < span class ="k "> template</ span > < span class ="o "> <</ span > < span class ="k "> class</ span > < span class ="nc "> Default</ span > < span class ="o "> =</ span > < span class ="n "> < a href ="default_domain.html "> default_domain</ a > </ span > < span class ="p "> ,</ span > < span class ="k "> class</ span > < span class ="nc "> Sndr</ span > < span class ="o "> ></ span >
229+ < span class ="k "> constexpr</ span > < span class ="k "> auto</ span > < span class ="n "> completion</ span > < span class ="o "> -</ span > < span class ="n "> domain</ span > < span class ="p "> (</ span > < span class ="k "> const</ span > < span class ="n "> Sndr</ span > < span class ="o "> &</ span > < span class ="n "> sndr</ span > < span class ="p "> )</ span > < span class ="k "> noexcept</ span > < span class ="p "> ;</ span >
230+ </ code > </ pre > </ div >
231+ </ p >
232+ < h2 > 概要</ h2 >
233+ < p > < a href ="sender.html "> Sender型</ a > < code > sndr</ code > の< a href ="get_completion_scheduler.html "> 完了Scheduler</ a > から< a href ="default_domain.html "> 実行ドメイン</ a > を取得する説明専用の関数テンプレート。</ p >
234+ < h2 > 効果</ h2 >
235+ < p > 説明用の型< code > COMPL-DOMAIN(T)</ code > を式< code > < a href ="get_domain.html "> get_domain</ a > (< a href ="get_completion_scheduler.html "> get_completion_scheduler</ a > <T>(< a href ="get_env.html "> get_env</ a > (sndr)))</ code > の型とする。</ p >
236+ < ul >
237+ < li > 型< code > COMPL-DOMAIN(< a href ="set_value.html "> set_value_t</ a > )</ code > 、< code > COMPL-DOMAIN(< a href ="set_error.html "> set_error_t</ a > )</ code > 、< code > COMPL-DOMAIN(< a href ="set_stopped.html "> set_stopped_t</ a > )</ code > の全てが< a class ="cpprefjp-defined-word " data-desc ="プログラムが適格でないこと。コンパイルエラーなどになる " href ="../../../implementation-compliance.html#dfn-ill-formed "> 不適格</ a > の場合、< code > completion-domain<Default></ code > は< code > Default</ code > 型の< a class ="cpprefjp-defined-word " data-desc ="デフォルト初期化。`T x;`構文での初期化。トリビアルにデフォルト構築可能な型の場合は初期化されず(オブジェクトのlifetimeは開始される)、そうではないクラス型はデフォルトコンストラクタで初期化する。配列型の場合は各要素が再帰的にデフォルト初期化される "> デフォルト構築</ a > されたprvalueとなる。</ li >
238+ < li > そうではなく、上記のうち< a class ="cpprefjp-defined-word " data-desc ="プログラムが適格でないこと。コンパイルエラーなどになる " href ="../../../implementation-compliance.html#dfn-ill-formed "> 不適格</ a > となる型を除いた型が< a href ="../../type_traits/common_type.html "> 共通型</ a > を共有するならば、< code > completion-domain<Default></ code > はその共有型の< a class ="cpprefjp-defined-word " data-desc ="デフォルト初期化。`T x;`構文での初期化。トリビアルにデフォルト構築可能な型の場合は初期化されず(オブジェクトのlifetimeは開始される)、そうではないクラス型はデフォルトコンストラクタで初期化する。配列型の場合は各要素が再帰的にデフォルト初期化される "> デフォルト構築</ a > されたprvalueとなる。</ li >
239+ < li > そうでなければ、< code > completion-domain<Default></ code > は< a class ="cpprefjp-defined-word " data-desc ="プログラムが適格でないこと。コンパイルエラーなどになる " href ="../../../implementation-compliance.html#dfn-ill-formed "> 不適格</ a > となる。</ li >
240+ </ ul >
241+ < h2 > < 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 > </ h2 >
242+ < p > 投げない</ p >
243+ < h2 > バージョン</ h2 >
244+ < h3 > 言語</ h3 >
245+ < ul >
246+ < li > C++26</ li >
247+ </ ul >
248+ < h2 > 関連項目</ h2 >
249+ < ul >
250+ < li > < code > < span href ="https://cpprefjp.github.io/reference/execution/execution/get-domain-early.md.nolink "> get-domain-early</ span > </ code > </ li >
251+ < li > < code > < a href ="get-domain-late.html "> get-domain-late</ a > </ code > </ li >
252+ </ ul >
253+ < h2 > 参照</ h2 >
254+ < ul >
255+ < li > < a href ="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2999r3.html " target ="_blank "> P2999R3 Sender Algorithm Customization</ a > </ li >
256+ < 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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