attach await_ready await_suspend cast_ret_value convert_to detach forward_to forward_to future future future get get_promise has_exception has_value is_awaited is_deferred is_in_progress is_pending operator cast_ret_value operator! operator<< operator>> requires ret_value set_callback setDeferredEvaluation start startDeferredEvaluation then unset_callback wait ~future

operator<<() template<typename T > template<invocable_r_exact< future > Fn> future& coro::future< T >::operator<< ( Fn &&  fn ) inline Store result future in already declared value. As the future cannot be copied or moved, only way to "store" result of function to existing future variable is through this operator. Note that operator accepts a function, which returns future of the exact same type future<int> doSomething(args) {...} future<int> fut; //... other code ... fut << [&]{return doSomething(args);}; int res = co_await fut; Definition at line 548 of file future.h.