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std:: swap (std::promise)

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std::promise
定义于头文件 <future>
template < class R >
void swap ( promise < R > & lhs, promise < R > & rhs ) noexcept ;
(C++11 起)

为 std::swap 算法针对 std::promise 进行特化。交换 lhs 与 rhs 的共享状态。实际效果等同于调用 lhs. swap ( rhs ) 。

目录

参数

lhs, rhs - 要交换状态的承诺对象

返回值

(无)

示例

本节内容不完整
原因：缺少示例

参见

交换两个 promise 对象
(公开成员函数)