62. Enum Classes

Question.4

A developer accidentally compares values from two different enums:

enum class Motor : uint8_t { OFF = 0, ON = 1 };
enum class LED   : uint8_t { OFF = 0, ON = 1 };

if (Motor::OFF == LED::OFF) {  // Compare across enums
   printf("Same!");
}

What happens?

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Prints "Same!" -- both have value 0
Compilation error -- enum class prevents comparison between different enum types
Prints nothing -- the values are in different scopes
Depends on the underlying type

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