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std::future::future

科技促进发展：：未来：未来

future((1)(since C++11)
future( future&& other (2)(since C++11)
future( const future& other ) = delete;(3)(since C++11)

构造一个std::future对象。

1%29默认构造函数。构造一个std::future没有共享状态。建造后，valid()== false...

2%29移动构造函数。构造一个std::future的共享状态other使用移动语义。建造后，other.valid() == false...

3%29std::future不是CopyConstructible...

参数

other-another std::future to acquire shared state from

例外

1-2%29

noexcept规格：

noexcept

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