覆盖虚函数时的异常规范？ [英] Exception specification when overriding a virtual function?

问题描述

如果一个类从另一个类继承并覆盖一个虚函数，那么派生（重写）函数的异常规范必须与基函数相关联。

If a class inherits from another and overrides a virtual function, how must the exception-specification for the derived (overridden) function be related to the base function?

这是必须至少是作为限制吗？对？

Is that is must be at least as restrictive? right? or others?

推荐答案

是的，它必须至少是同样限制的（§15.4/ 3）：

Yes, it must be at least as restrictive (§15.4/3):

如果一个虚函数有一个异常规范，任何函数
的所有声明，包括定义，覆盖任何派生类中的虚函数，只允许由基类虚拟函数的
异常规范允许的异常。

If a virtual function has an exception-specification, all declarations, including the definition, of any function that overrides that virtual function in any derived class shall only allow exceptions that are allowed by the exception-specification of the base class virtual function.

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