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std::promise::set_exception_at_thread_exit

STD：：承诺：：设定[医]例外[医]在[医]螺纹[医]出口

void set_exception_at_thread_exit( std::exception_ptr p ​(since C++11)

存储异常指针。p进入共享状态，而不使状态立即就绪。当当前线程退出时，状态已经就绪，在所有具有线程本地存储持续时间的变量都已被销毁之后。

这个操作的行为就像set_value，，，set_exception，，，set_value_at_thread_exit，和set_exception_at_thread_exit在更新允诺对象时获取与承诺对象关联的单个互斥对象。

如果没有共享状态，或者共享状态已经存储了值或异常，则引发异常。

参数

p-exception pointer to store. The behavior is undefined if p is null.

返回值

%280%29

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...

  • 共享状态已存储值或异常。错误类别设置为promise_already_satisfied...

例

另见

set_exceptionsets the result to indicate an exception (public member function)

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