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· the class template std::future provides a mechanism to access the result of asynchronous operations: Im wondering how this break in backwards … · the get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value … This is the case only for futures that were not default … · checks if the future refers to a shared state. · in this case it does work. · to opt-in to the future behavior, set `pd. set_option(future. no_silent_downcasting, … In general, it probably doesnt.