c++ - 如何在不收到编译器警告的情况下使用 C++ 枚举

Question

我需要传达一个相同的枚举被传递给多个调用。所以我这样做:

MiddleEarth::Creatures ally = MiddleEarth::Creatures::Elf;

myEnergy->Transfer(ally, 10);
myLives->Transfer(ally, 1);

两种传输方法声明如下:

Energy::Transfer(const Creatures& transferTo, (snip)

但是，我在声明名为 ally 的变量时收到以下警告:

 warning C4482: nonstandard extension used: enum 'MiddleEarth::Creatures' used in qualified name

我做错了什么？如何重写我的代码以使其不生成编译器警告？

Answer 1

来自MSDN page on the warning ;

When you refer to an enum inside a type, you do not need to specify the name of the enum.

int i = S::E::a; // C4482
int j = S::a; // OK

所以在你的情况下；

MiddleEarth::Creatures::Elf

应该是

MiddleEarth::Elf