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std::shared_future<T>:: ~shared_future

From cppreference.net
C++
Concurrency support library
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this_thread namespace
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(C++11)
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(C++11) (deprecated in C++20)
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Memory ordering
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Free functions for atomic operations
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(C++11) (C++11) (C++11) (C++11)
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(C++11) (C++11)
(C++11) (C++11)
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(C++26) (C++26)
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Free functions for atomic flags
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(C++20) (C++20)
(C++20) (C++20)
(C++20)
(C++20)
std::shared_future
~shared_future ( ) ;
(自 C++11 起)

如果 * this 是最后一个引用共享状态的对象，则销毁共享状态。否则不执行任何操作。