Compiler Error C3063

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operator 'operator': all operands must have the same enumeration type

When using operators on enumerators, both operands must be of the enumeration type. For more information, see Using Operators and Enumerations.

The following sample generates C3063:

// C3063.cpp
// compile with: /clr
enum class E { a, b } e, mask;
int main() {
   if ( ( e & mask ) != 0 ) ;   // C3063 no operator!= (E, int)

   if ( ( e & mask ) != E() )   // OK
      ;
}