#include <iostream>
using namespace std;
 
enum Type {
	AType = 0,
	BType,
	CType,
};
 
void AOpen() { std::cout << "A open." << std::endl; }
void BOpen() { std::cout << "B open." << std::endl; }
void COpen() { std::cout << "C open." << std::endl; }
 
template<Type T>
class TypeWrapper {
	public:
	void open();
	void close();
};
 
template<>
void TypeWrapper<AType>::open() { AOpen(); }
 
template<>
void TypeWrapper<BType>::open() { BOpen(); }
 
template<>
void TypeWrapper<CType>::open() { COpen(); }
 
int main() {
	TypeWrapper<AType> wrapped_a;
	TypeWrapper<BType> wrapped_b;
	wrapped_a.open();
	wrapped_b.open();
	return 0;
}

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