std::future<T>::
~future
来自cppreference.com
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~future
(
)
;
(C++11 起)
释放任何共享状态。这表示
若返回对象或提供方保有到其共享状态的最后引用,则析构共享状态;
返回对象或提供方放弃到其共享状态的引用;
这些动作将不会阻塞至共享状态变为准备,除了若以下为真则它可能阻塞:共享状态以到 std::async 的调用创建,共享状态仍未就绪,且 this 是到共享状态的最后引用。
(C++14 起)