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std::exception::what

STD：：例外：：什么

virtual const char* what() const;​​

返回解释性字符串。

参数

%280%29

返回值

指向带解释性信息的以空结尾的字符串的指针。指针至少要保证有效，直到从中获得的异常对象被销毁，或者直到异常对象上的非Const成员函数被调用为止。

例外

(none)(until C++11)
noexcept specification: noexcept(since C++11)

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