#include <iostream>
 
int AOpen(const char*) { std::cout << "Aopen" << std::endl; return 0; }
void AClose(int) { std::cout << "Aclose" << std::endl; }
 
int BOpen(const char*) { std::cout << "Bopen" << std::endl; return 0; }
void BClose(int) { std::cout << "Bclose" << std::endl; }
 
 
 
template <typename H, H Open(const char*), void Close(H)>
class Wrapper
{
public:
    Wrapper(const char* file) : h(Open(file)) {}
    ~Wrapper() { Close(h); }
 
    Wrapper(const Wrapper&) = delete;
    Wrapper& operator = (const Wrapper&) = delete;
private:
    H h;
};
 
int main()
{
    Wrapper<int, AOpen, AClose> wA("test");
    Wrapper<int, BOpen, BClose> wB("test");
}
 

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