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Mar 12, 2024 · The class template std::future provides a mechanism to access the result of asynchronous operations: An asynchronous operation (created via std::async, std::packaged_task,. Nov 27, 2023 · future (const future &) = delete; ~future (); future & operator =(const future &) = delete; future & operator =(future &&) noexcept; shared_future <R> share () noexcept; // retrieving the value. Oct 22, 2023 · 2) Move constructor. Constructs a std::future with the shared state of other using move semantics. After construction, other.valid() == false. Assigns the contents of another future object. 1) Releases any shared state and move-assigns the contents of other to *this. After the assignment, other.valid() == false and this->valid() will yield the. Aug 27, 2021 · Checks if the future refers to a shared state. This is the case only for futures that were not default-constructed or moved from (i.e. returned by std::promise::get_future (),.

Aug 27, 2021 · If the future is the result of a call to std::async that used lazy evaluation, this function returns immediately without waiting. This function may block for longer than timeout_duration due to. Oct 9, 2023 · an unwrapping constructor from future<future<T>>; a member function is_ready to query whether the associated shared state is ready; and a member function then to attach a continuation to.