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std::future_error:: what

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std::future_error
virtual const char * what ( ) const noexcept ;
(自 C++11 起)

返回说明性字符串。

参数

(无)

返回值

指向以空字符结尾的说明性信息字符串的指针。

参见

返回错误代码
(公开成员函数)