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202+ 最終更新日時(UTC):
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204+ 2025年04月22日 05時33分12秒
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210+ が更新
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227+ < div class ="identifier-type "> customization point object</ div > < div class ="header "> <execution></ div > < h1 itemprop ="name "> < span class ="namespace " title ="namespace std::execution "> std::execution::</ span > < span class ="token "> get_delegation_scheduler</ 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 "> namespace</ span > < span class ="n "> std</ span > < span class ="o "> ::</ span > < span class ="n "> execution</ span > < span class ="p "> {</ span >
229+ < span class ="k "> struct</ span > < span class ="n "> get_delegation_scheduler_t</ span > < span class ="p "> {</ span > < span class ="n "> < i > unspecified</ i > </ span > < span class ="p "> };</ span >
230+ < span class ="k "> constexpr</ span > < span class ="n "> get_delegation_scheduler_t</ span > < span class ="n "> get_delegation_scheduler</ span > < span class ="p "> {};</ span >
231+ < span class ="p "> }</ span >
232+ </ code > </ pre > </ div >
233+ </ p >
234+ < h2 > 概要</ h2 >
235+ < p > < code > get_delegation_scheduler</ code > は、< a href ="../queryable.html "> クエリ可能オブジェクト</ a > から委任< a href ="scheduler.html "> Scheduler</ a > を取得する< a href ="../queryable.html "> クエリオブジェクト</ a > である。</ p >
236+ < p > コア定数式< code > < span href ="https://cpprefjp.github.io/reference/execution/execution/forwarding_query.md.nolink "> forwarding_query</ span > (get_delegation_scheduler)</ code > は< code > true</ code > 値を返す。</ p >
237+ < h2 > 効果</ h2 >
238+ < p > 呼び出し式< code > get_delegation_scheduler(env)</ code > は下記と等価であり、< a class ="cpprefjp-defined-word " data-desc ="プログラムが文法規則・診断対象の意味規則・単一定義規則を満たすこと " href ="../../../implementation-compliance.html#dfn-well-formed "> 適格</ a > であれば< code > < a href ="scheduler.html "> scheduler</ a > </ code > を満たす型の値となる。</ p >
239+ < ul >
240+ < li > 引数< code > env</ code > がconst修飾された< code > cenv</ code > を用いて、式< code > cenv.query(get_delegation_scheduler)</ code > </ li >
241+ </ ul >
242+ < 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 >
243+ < p > 投げない</ p >
244+ < h2 > カスタマイゼーションポイント</ h2 >
245+ < p > const修飾< a href ="../queryable.html "> クエリ可能オブジェクト</ a > < code > cenv</ code > に対して式< code > cenv.query(get_delegation_scheduler)</ code > が呼び出される。
246+ このとき、< code > noexcept(cenv.query(get_delegation_scheduler)) == true</ code > であること。</ p >
247+ < h2 > バージョン</ h2 >
248+ < h3 > 言語</ h3 >
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250+ < li > C++26</ li >
251+ </ ul >
252+ < h3 > 処理系</ h3 >
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254+ < li > < a href ="../../../implementation.html#clang "> Clang</ a > : ??</ li >
255+ < li > < a href ="../../../implementation.html#gcc "> GCC</ a > : ??</ li >
256+ < li > < a href ="../../../implementation.html#icc "> ICC</ a > : ??</ li >
257+ < li > < a href ="../../../implementation.html#visual_cpp "> Visual C++</ a > : ??</ li >
258+ </ ul >
259+ < h2 > 関連項目</ h2 >
260+ < ul >
261+ < li > < code > < a href ="scheduler.html "> scheduler</ a > </ code > </ li >
262+ </ ul >
263+ < h2 > 参照</ h2 >
264+ < ul >
265+ < 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 >
266+ < li > < a href ="https://github.com/NVIDIA/stdexec/pull/354 " target ="_blank "> NVIDIA/stdexec, Pull Request#354, with_delegee_scheduler</ a > </ li >
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