#include <iostream>
#include <cstdlib>
using namespace std;

bool inside(const bool& t1);
int inside(const int& t1);
double inside(const double& t1);

template <class T>
class wrapper {
        T t;
public:
        wrapper(const T& initial_t = T()): t(initial_t) {}
        friend T outside(const T& t1);
        friend T inside(const T& t1) {return wrapper<T>(t1).t;}
};

inline bool   outside(const bool& b)   {return wrapper<bool>(b).t;}
inline int    outside(const int& i)    {return wrapper<int>(i).t;}
inline double outside(const double& d) {return wrapper<double>(d).t;}

int main()
{
	cout << boolalpha
		<< outside(true) << "\n"
		<< outside(10) << "\n"
		<< outside(3.14) << "\n"

		<< inside(true) << "\n"
		<< inside(10) << "\n"
		<< inside(3.14) << "\n";

        return EXIT_SUCCESS;
}