· an asynchronous operation (created via std::async, std::packaged_task, or std::promise) can provide a std::future object … · checks if the future refers to a shared state. Valid()==true after the call. · blocks until the result becomes available. Std::future is an object used in multithreaded programming to receive data or an exception from a different … · the get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared … This is the case only for futures that were not default-constructed or moved …

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