This is how you don't code game rules.

epic_fail_2.cpp

    #include <iostream>
     
    enum stuff {
    laugh,
    strike,
    slap,
    };
     
    struct true_ {};
    struct false_ {};
     
     
    template<unsigned>
    struct stuffTriggersSlap { typedef false_ T; };
     
    template<>
    struct stuffTriggersSlap<strike> { typedef true_ T; };
     
    template<>
    struct stuffTriggersSlap<slap> { typedef true_ T; };
     
     
    template<typename T>
    void maybeTriggerSlap(void)
    {
    std::cout << "Not slapped." << std::endl;
    }
     
     
    template<>
    void maybeTriggerSlap<true_>(void)
    {
    std::cout << "Slapped." << std::endl;
    }
     
     
    int main (int argc, char **argv)
    {
    maybeTriggerSlap<typename stuffTriggersSlap<laugh>::T>();
    maybeTriggerSlap<typename stuffTriggersSlap<strike>::T>();
    maybeTriggerSlap<typename stuffTriggersSlap<slap>::T>();
    return 0;
    }