Assuming gcc or similar, -Wall will pick up on this. int main() { enum states { A, B, C } x = A; switch(x) { case A: break; cas

Assuming gcc or similar, -Wall will pick up on this. int main() { enum states { A, B, C } x = A; switch(x) { case A: break; case B: break; // C not handled on purpose } return 0; } $ g++ -Wall -Werror -o enum enum.cc cc1plus: warnings being treated as errors enum.cc: In function ‘int main()’: enum.cc:3: warning: enumeration value ‘C’ not handled in switch I like this behavior since I can deliberately leave out a default and make sure I always have every case handled explicitly.