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std::shared_future<T>:: operator=

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std::shared_future
(1)
shared_future & operator = ( const shared_future & other ) ;
(自 C++11 起)
(直至 C++17)
shared_future & operator = ( const shared_future & other ) noexcept ;
(自 C++17 起)
shared_future & operator = ( shared_future && other ) noexcept ;
(2) (自 C++11 起)

将另一个 shared_future 的内容进行赋值。

1) 释放所有共享状态并将 other 的内容赋值给 * this 。赋值操作后， this - > valid ( ) == other. valid ( ) 。
2) 释放所有共享状态，并将 other 的内容移动赋值给 * this 。赋值操作后， other. valid ( ) == false ，且 this->valid() 将返回与赋值前 other. valid ( ) 相同的值。

参数

其他 - 一个 std::shared_future ，将把状态转移给 * this

返回值

* this