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std:: future_category

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定义于头文件 <future>
const std:: error_category & future_category ( ) noexcept ;
(C++11 起)

获取与future和promise相关错误的静态错误类别对象的引用。该对象需要重写虚函数 error_category :: name ( ) 以返回指向字符串 "future" 的指针。它用于标识在 std::future_error 类型异常中提供的错误代码。

目录

参数

(无)

返回值

对具有未指定运行时类型的静态对象的引用，该类型派生自 std::error_category 。

示例

本节内容不完整
原因：缺少示例

参见

(C++11)
标识 future 错误代码
(枚举)
(C++11)
报告与 futures 或 promises 相关的错误
(类)
(C++11)
错误类别的基类
(类)