std:: noop_coroutine_promise
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| Coroutine traits | ||||
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(C++20)
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| Coroutine handle | ||||
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(C++20)
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| No-op coroutines | ||||
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noop_coroutine_promise
(C++20)
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(C++20)
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| Trivial awaitables | ||||
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(C++20)
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(C++20)
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| Range generators | ||||
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(C++23)
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Defined in header
<coroutine>
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struct
noop_coroutine_promise
{
}
;
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(since C++20) | |
noop_coroutine_promise
is the promise type of no-op coroutines.
A no-op coroutine behaves as if it
- does nothing other than the control flow of a coroutine, and
- is suspended immediately after beginning and resumption, and
- has a coroutine state such that destroying the state is no-op, and
- never reaches its final suspended point if there is any std::coroutine_handle referring to it.
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This section is incomplete
Reason: more precise wording |
No-op coroutines can be started by std::noop_coroutine , and controlled by the coroutine handle it returns. The returned coroutine handle is of type std::noop_coroutine_handle , which is a synonym for std:: coroutine_handle < std :: noop_coroutine_promise > .
Some operations of a no-op coroutines are determined no-op at compile time through the type
std::noop_coroutine_handle
.
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This section is incomplete
Reason: usage of no-op coroutines |
Example
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This section is incomplete
Reason: no example |
See also
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(C++20)
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creates a coroutine handle that has no observable effects when resumed or destroyed
(function) |
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(C++20)
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std::
coroutine_handle
<
std
::
noop_coroutine_promise
>
, intended to refer to a no-op coroutine
(typedef) |