C++ 枚举类可以有方法吗?

Can a C++ enum class have methods?(C++ 枚举类可以有方法吗?)

问题描述

我有一个带有两个值的枚举类，我想创建一个接收值的方法并返回另一个.我还想保持类型安全(这就是我使用枚举类而不是枚举的原因).

I have an enum class with two values, and I want to create a method which receives a value and returns the other one. I also want to maintain type safety(that's why I use enum class instead of enums).

http://www.cplusplus.com/doc/tutorial/other_data_types/ 没有提到任何关于方法的内容然而，我的印象是任何类型的类都可以有方法.

http://www.cplusplus.com/doc/tutorial/other_data_types/ doesn't mention anything about methods However, I was under the impression that any type of class can have methods.

推荐答案

不，他们不能.

我可以理解，C++11 中强类型枚举的 enum class 部分似乎暗示您的 enum 具有 class特质也是如此，但事实并非如此.我有根据的猜测是，关键字的选择受到了我们在 C++11 之前用于获取作用域枚举的模式的启发:

I can understand that the enum class part for strongly typed enums in C++11 might seem to imply that your enum has class traits too, but it's not the case. My educated guess is that the choice of the keywords was inspired by the pattern we used before C++11 to get scoped enums:

class Foo {
public:
  enum {BAR, BAZ};
};

然而，这只是语法.同样，enum class 不是 class.

However, that's just syntax. Again, enum class is not a class.

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