抛出C ++异常时抛出什么？ [英] What to throw when throwing C++ exceptions?

问题描述

这可能是一个愚蠢的问题，但在C ++中，当我想抛出一个异常..我该抛什么？

This might be kind of a silly question, but in C++, when I want to throw an exception.. what do I throw?

我应该抛出std :: exception，还是由标准库保留的？或者我应该抛出一个字符串或int？

Am I supposed to throw std::exception, or is that reserved by the standard library? Or should I throw a string or int? Or should I just throw whatever I feel is appropriate?

推荐答案

抛出一个源自 std的类： ：exception ;如果您 #include< stdexcept> ，您可以从一些

Throw a class that's derived from std::exception; if you #include <stdexcept>, you can pick from a number of ready-made, useful derived classes.

派生自 std :: exception 允许你的处理程序遵循可识别的风格，因为你总是可以使用 .what（）来获取文本消息。不要抛出原始类型，因为它们不带有语义信息。

Deriving from std::exception allows your handlers to follow a recognizable style, as you can always use .what() to get a textual message. Don't throw primitive types, since they carry no semantic information.

这篇关于抛出C ++异常时抛出什么？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！