Using an enum as an array index

Question

I have this enum:

enum ButtonState {
    BUTTON_NORMAL = 0,
    BUTTON_PRESSED = 1,
    BUTTON_CLICKED = 2
};

const u8 NUM_BUTTON_STATES = 3;

Answer 1

Style-wise, it's just fine.

Pascal-based languages like Delphi allow array bounds to be specified as an enum type, so you can only use items of that specific type as an index.