如何在不获取err：redefinition;的情况下在不同的枚举名称中具有相同的枚举成员名称先前的定义是“枚举器” [英] c++ how to have same enum members name in different enum names without getting err:redefinition; previous definition was 'enumerator'

问题描述

我有配置文件，我在所有文件
中都包含有不同的枚举，但是在每个枚举中都有相同的元素名称
，例如：config.h

I have config file that I include in all my files there I have different enums but inside each enum there are same element names for example: config.h

enum GameObjectType
{
     NINJA_PLAYER

};
enum GameObjectTypeLocation
{
    NONE,
    MASSAGE_ALL,  //this is for ComponentMadiator
    NINJA_PLAYER


};

但是当我尝试通过使用正确的枚举名称调用枚举来编译项目时，

But when I try to compile the project with calling the enums with the proper enum name

m_pNinjaPlayer = (NinjaPlayer*)GameFactory::Instance().getGameObj(GameObjectType::NINJA_PLAYER);
    ComponentMadiator::Instance().Register(GameObjectTypeLocation::NINJA_PLAYER,m_pNinjaPlayer);

我遇到编译错误：

error C2365: 'NINJA_PLAYER' : redefinition; previous definition was 'enumerator' (..\Classes\GameFactory.cpp)
2>          d:\dev\cpp\2d\cocos2d-x-3.0\cocos2d-x-3.0\projects\lettersfun\classes\config.h(22) : see declaration of 'NINJA_PLAYER'

如何在config.h中保留几个具有不同名称但具有相同元素名称的枚举？

How can I keep in the config.h several enums with different names BUT with same elements names ?

推荐答案

问题是旧式枚举没有作用域。您可以通过使用范围枚举来避免此问题（前提是您的编译器具有相关的C ++ 11支持）：

The problem is that old-style enumerations are unscoped. You can avoid this problem (provided your compiler has the relevant C++11 support) by using scoped enumerations:

enum class GameObjectType { NINJA_PLAYER };

enum class GameObjectTypeLocation { NONE, MASSAGE_ALL, NINJA_PLAYER };

或者，您可以将老式枚举放在命名空间中：

Alternatively, you can put your old-school enumerations in namespaces:

namespace foo
{
  enum GameObjectType { NINJA_PLAYER };
} // namespace foo

namespace bar
{
  enum GameObjectTypeLocation { NONE, MASSAGE_ALL, NINJA_PLAYER };
} // namespace bar

然后，您的枚举值将为 foo :: NINJA_PLAYER ， bar :: NINJA_PLAYER 等

Then your enum values will be foo::NINJA_PLAYER, bar::NINJA_PLAYER etc.

这篇关于如何在不获取err：redefinition;的情况下在不同的枚举名称中具有相同的枚举成员名称先前的定义是“枚举器”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！