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std::packaged_task<R(Args...)>:: get_future

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std::packaged_task
std:: future < R > get_future ( ) ;
(自 C++11 起)

返回一个与 * this 共享相同共享状态的 future 。

get_future 对于每个 packaged_task 只能被调用一次。

参数

(无)

返回值

一个与 * this 共享相同共享状态的future。

异常

std::future_error 在以下错误条件下触发：