枚举值在全球范围内是否独一无二？

问题描述

$ b

 枚举颜色= {红，橙，黄}; 
 enum fruit = {apple，orange，kiwi}; // error：orange is redefined 
 int kiwi = 42; //错误：猕猴桃被重新定义
  

---

我在Ubuntu 14.10中在MonoDevelop中编写C＃应用程序，我试图重现这种行为：

 使用系统; 
 
命名空间FP 
 {
 class MainClass 
 {
枚举颜色{红，橙，黄}; 
 enum fruit {apple，orange，kiwi}; // error：orange is redefined 
 int kiwi = 42; //错误：kiwi被重新定义
 public static void Main（string [] args）
 {
 Console.WriteLine（Hello World！）; 
} 
} 
} 
  

上面的程序成功编译。

这是一个已知的MonoDevelop行为还是为什么编译没有错误？枚举值在全局范围内是否唯一？

解决方案

您正在谈论的是 c 语言。

在 c＃中，枚举不能通过名称全局访问，您始终必须通过 typeName.valueName ，例如 color.Orange ， fruit.Orange 。所以没有冲突。实际上，许多内置枚举使用相同的值名称（ StringSplitOptions.None ， CompareOptions.None ）。 p>

I read in The Fundamentals of Programming course that the enum values should be unique, having the following example:

enum color = { red, orange, yellow };
enum fruit = { apple, orange, kiwi}; // error: orange is redefined
int kiwi = 42; // error: kiwi is redefined

---

I write C# apps in MonoDevelop on Ubuntu 14.10 and I tried to reproduce this behavior:

using System;

namespace FP
{
    class MainClass
    {
        enum color { red, orange, yellow };
        enum fruit { apple, orange, kiwi}; // error: orange is redefined
        int kiwi = 42; // error: kiwi is redefined
        public static void Main (string[] args)
        {
            Console.WriteLine ("Hello World!");
        }
    }
}

The program above compiled successfully.

Is this a known MonoDevelop behavior or why it was compiled without errors? Should the Enum values be unique in the global scope?

解决方案

What you are talking about is behaviour of the c language.

In c# enums are not globally accessible by name, you always have to access them by typeName.valueName, e.g. color.Orange, fruit.Orange. So there will be no conflict. In fact many in-built enums use the same value names (StringSplitOptions.None, CompareOptions.None).

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