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std::promise::get_future

STD：：承诺：[医]未来

std::future get_future(​(since C++11)

返回与同一共享状态关联的未来对象。*this...

异常将在以下情况下引发：*this没有共享状态或get_future已经被召唤了。若要获得承诺未来通信通道的多个“POP”端，请使用std::future::share...

参数

%280%29

返回值

指共同状态的未来*this...

例外

std::future_error在下列条件下：

  • *this没有共享状态。错误类别设置为no_state...

  • get_future()已经被要求履行一个承诺，该承诺具有相同的共享状态。*this错误类别设置为future_already_retrieved...

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