IceCream, C++ (gcc)

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//g++  7.4.0

#include <iostream>
#include <vector>
#include <string>

class IIceCream {
    public:
    virtual std::string print() = 0;
};

template<typename T>
class IceCream final : public IIceCream {
    public:
    IceCream(T your_choice) {
        mChoosen = your_choice;
    }
    
    std::string print() final {
        
        return std::to_string(static_cast<typename std::underlying_type<T>::type>(mChoosen));
    }
    
    friend std::ostream& operator<< (std::ostream& out, const IceCream<T>& day);
    
    private:
    T mChoosen;
};
   
enum class My_creams {
    CORNETTO,
    SANDWHICH,
    TIPTOP,
};

template <typename T>
std::ostream& operator<< (std::ostream& out, const IceCream<T>& day) {
    std::cout << "test";
}

int main()
{    
   
    
    auto my_best = My_creams::TIPTOP;
    
    auto my_best_ice_cream = new IceCream<My_creams>(my_best);
    
    auto my_selection = std::vector<IIceCream *>();
    
    my_selection.push_back(my_best_ice_cream);
    
    for (auto aCream : my_selection) {
        std::cout << aCream->print();
    }
}

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Compilation time: 0.53 sec, absolute running time: 0.17 sec, cpu time: 0.01 sec, memory peak: 3 Mb, absolute service time: 0,87 sec