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c++arraysenumssdl

enum class as array index

I made an enum as:

enum class KeyPressSurfaces {
    KEY_PRESS_SURFACE_DEFAULT,
    KEY_PRESS_SURFACE_UP,
    KEY_PRESS_SURFACE_DOWN,
    KEY_PRESS_SURFACE_LEFT,
    KEY_PRESS_SURFACE_RIGHT,
    KEY_PRESS_SURFACE_TOTAL
};

and later on I attempt to define an array as I typed below, but I received the error, size of array 'KEY_PRESS_SURFACES' has non-integral type 'KeyPressSurfaces'

SDL_Surface*KEY_PRESS_SURFACES[KeyPressSurfaces::KEY_PRESS_SURFACE_TOTAL];

I understand the error fine, but I don't know where to move the KeyPressSurfaces to qualify the constant in the enum.

I also realize I could just use an enum and not an enum class, but I feel like this should work, and I want to learn how to do this.

Any response/advice?

Solution

  • Scoped enums (enum class) are not implicitly convertible to integers. You need to use a static_cast:

    SDL_Surface*KEY_PRESS_SURFACES[static_cast<int>(KeyPressSurfaces::KEY_PRESS_SURFACE_TOTAL)];