when_all

when_all is an operation that starts all the given senders concurrently, and only completes when all of them complete.

Prototype

template <typename... Senders>
sender when_all(Senders... senders);

Requirements

Every type of Senders is a sender that doesn't return any value.

Arguments

• senders - the senders to start.

Return value

This function returns a sender of unspecified type. The sender does not return any value.

Examples

async::run(async::when_all(
	[] () -> async::result<void> {
		std::cout << "Hi 1" << std::endl;
		co_return;
	}(),
	[] () -> async::result<void> {
		std::cout << "Hi 2" << std::endl;
		co_return;
	}()
));
std::cout << "Done" << std::endl;

Possible output:

Hi 1
Hi 2
Done