一个类中的枚举，带有显式范围，前C ++ 11？ [英] Enums within a class, with explicit scoping, pre-C++11?

问题描述

我使用VS2010，它没有C ++ 11的强类型枚举。

I use VS2010 which doesn't have the strongly typed enums of C++11. The strong typing I can live without, but all the same, I'd like to keep enumerations out of my class's namespace.

class Example{
    enum Color{
        red,
        green,
        blue
    };

    int Rainbows{
        Color x = red;           // this should be impossible
        Color y = Color::green;  // this is the only way at the enumerations
    }
};

我的问题是，什么是最好的方式来完成这个，pre-C ++ 11？ / p>

My question, is what is the best way to accomplish this, pre-C++11?

推荐答案

namespace ExampleColor {
   enum Color {
     red,
     green,
     blue
   };
}

class Example {
   int Rainbows{ExampleColor::Color x = ExampleColor::red};
};

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