std::execution::when_all

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Execution control library

Execution concepts

scheduler
receiver
receiver_of
operation_state

sender
sender_in
sender_to

Forward progress guarantee

forward_progress_guarantee

std::forwarding_query

get_scheduler

get_domain

get_forward_progress_guarantee

get_delegation_scheduler

get_completion_scheduler

Completion signatures

completion_signatures

completion_signatures_of_t

transform_completion_signatures

transform_completion_signatures_of

value_types_of_t
error_types_of_t

tag_of_t
sends_stopped

Sender adaptor closures

sender_adaptor_closure

Coroutine utility

as_awaitable

with_awaitable_senders

Core operations

Operation state

connect
connect_result_t

schedule
schedule_result_t

Sender adaptors

starts_on
continues_on
on
then
upon_error
upon_stopped
let_value
let_error
let_stopped
schedule_from
when_all

when_all_with_variant
into_variant
stopped_as_optional
stopped_as_error
bulk
split

Sender consumers

this_thread::sync_wait

this_thread::sync_wait_with_variant

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Defined in header`<execution>`
execution::senderauto when_all( execution::senderauto...inputs);		(since C++26)

[edit]Parameters

inputs - senders upon which the completion ofwhen_all is blocked. Can only include senders that can complete with a single set of values.

[edit]Return value

Returns a sender that completes once all of the input senders have completed. The values sent by this sender are the values sent by each of the input senders, in order of the arguments passed towhen_all.

[edit]Notes

The sender returned bywhen_all completes inline on the execution resource on which the last input sender completes, unlessstop is requested beforewhen_all is started, in which case it completes inline within the call to start.