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std::shared_future<T>:: operator=

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std::shared_future
(1)
shared_future & operator = ( const shared_future & other ) ;
(C++11以降)
(C++17まで)
shared_future & operator = ( const shared_future & other ) noexcept ;
(C++17以降)
shared_future & operator = ( shared_future && other ) noexcept ;
(2) (C++11以降)

別の shared_future の内容を割り当てます。

1) 共有状態を解放し、 other の内容を * this に代入する。代入後、 this - > valid ( ) == other. valid ( ) となる。
2) 共有状態を解放し、 other の内容を * this にムーブ代入する。代入後、 other. valid ( ) == false となり、 this->valid() は代入前の other. valid ( ) と同じ値を返す。

パラメータ

その他 - 状態を * this に転送する std::shared_future

戻り値

* this