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std::error_category::message

STD：错误[医]类别：电文

virtual std::string message( int condition ) const = 0;​(since C++11)

返回一个字符串，该字符串描述由*this...

参数

condition-specifies the error condition to describe

返回值

描述给定错误条件的字符串。

例外

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