62. Enum Classes

Question.5

A developer handles a state machine with switch-case:

enum class State : uint8_t { IDLE, RUN, FAULT };

void handle(State s) {
   switch (s) {
       case State::IDLE: idle_handler(); break;
       case State::RUN: run_handler();  break;
       // Missing: State::FAULT
   }
}

What advantage does enum class provide here?

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The compiler automatically handles the missing case at runtime
Modern compilers can warn about unhandled enum class cases in switch statements -- catching the missing FAULT handler at compile time
enum class switch statements cannot have missing cases -- it is a compile error
No advantage -- C-style enums have the same warning

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