std::coroutine_handle<Promise>::from_promise

 

C++

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Coroutine support

Coroutine traits

coroutine_traits (C++20)

Coroutine handle

coroutine_handle (C++20)

No-op coroutines

noop_coroutine_promise (C++20)

noop_coroutine (C++20)

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suspend_never (C++20)

suspend_always (C++20)

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generator (C++23)

 

std::coroutine_handle

Member functions

coroutine_handle::coroutine_handle

coroutine_handle::operator=

coroutine_handle::from_promise

Conversion

coroutine_handle::operator coroutine_handle<>

Observers

coroutine_handle::done

coroutine_handle::operator bool

Control

coroutine_handle::operator()coroutine_handle::resume

coroutine_handle::destroy

Promise access

coroutine_handle::promise

Export/import

coroutine_handle::address

coroutine_handle::from_address

Non-member functions

operator==operator<=>

Helper classes

hash<std::coroutine_handle>

 

static coroutine_handle from_promise( Promise& p );		(since C++20)

Creates a coroutine_handle from the promise object of a coroutine. The created coroutine_handle refers the coroutine, and promise() returns a reference to p.

The behavior is undefined if p is not a reference to a promise object. This function is only provided for the primary template, i.e. specializations std::coroutine_handle<> and std::coroutine_handle<std::noop_coroutine_promise> do not have this function.

Parameters

p

-

promise object of a coroutine to refer

Return value

A coroutine_handle referring the given coroutine.

See also

(constructor) (C++20)	constructs a coroutine_handle object (public member function)
from_address [static] (C++20)	imports a coroutine from a pointer (public static member function)
noop_coroutine (C++20)	creates a coroutine handle that has no observable effects when resumed or destroyed (function)