#include <stdio.h>
 
    struct Foo {
        enum { VAL_A = 0, VAL_B = 1, VAL_C = 2 };
    };
 
    struct Bar {
        enum { VAL_A = 10, VAL_B = 11, VAL_C = 12 };
    };
 
    template<typename T>
    void TestSwitch(int op)
    {
        printf("%u: ", op);
        switch (op) {
            case T::VAL_A: printf("aaa\n"); break;
            case T::VAL_B: printf("bbb\n"); break;
            case T::VAL_C: printf("ccc\n"); break;
            default: break;
        }
    }
 
    int main() {
        TestSwitch<Foo>(0);
        TestSwitch<Bar>(12);
    }
 

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