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cppdraft/exec/get/delegation/scheduler.md
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cppdraft/exec/get/delegation/scheduler.md
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[exec.get.delegation.scheduler]
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# 33 Execution control library [[exec]](./#exec)
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## 33.5 Queries [[exec.queries]](exec.queries#exec.get.delegation.scheduler)
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### 33.5.7 execution::get_delegation_scheduler [exec.get.delegation.scheduler]
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/exec.tex#L970)
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get_delegation_scheduler asks a queryable object for a scheduler
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that can be used to delegate work to
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for the purpose of forward progress delegation ([[intro.progress]](intro.progress "6.10.2.3 Forward progress"))[.](#1.sentence-1)
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/exec.tex#L975)
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The name get_delegation_scheduler denotes a query object[.](#2.sentence-1)
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For a subexpression env,get_delegation_scheduler(env) is expression-equivalent to*MANDATE-NOTHROW*(*AS-CONST*(env).query(get_delegation_scheduler))[.](#2.sentence-2)
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*Mandates*: If the expression above is well-formed,
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its type satisfies [scheduler](exec.sched#concept:scheduler "33.6 Schedulers [exec.sched]")[.](#2.sentence-3)
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/exec.tex#L985)
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forwarding_query(execution::get_delegation_scheduler) is
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a core constant expression and has value true[.](#3.sentence-1)
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