我们真的需要“枚举类"吗?在 C++11 中? [英] Do we really need "enum class" in C++11?

问题描述

当我们有时，

struct E { enum E_ { HELLO }; }; // 'E' is inheritable

那我们为什么需要，

enum class E { HELLO };  // 'E' is not inheritable

IMO 2nd 版本没有提供比 1st 多的功能.我不认为引入 enum class 只是为了节省 2 个花括号 {};！我是否遗漏了任何重要方面?

IMO 2nd version doesn't offer more features than the 1st. I don't think that enum class is introduced just to save 2 curly braces {};! Am I missing any important aspect ?

作为一个小问题，除了语法之外，enum class 和 enum struct 之间是否有任何区别(因为两者都有 public 访问说明符)?

As a minor question, is there any difference between enum class and enum struct other than syntax (because both have public access specifier) ?

推荐答案

除了已经提到的之外，enum class 的一个优点是更好的类型安全 - enum class 枚举器不会隐式转换为整数.

Besides what was already mentioned, an advantage of enum class is better type safety - the enum class enumerators don't convert implicitly to integers.

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