#include <boost/any.hpp>
#include <iostream>

// Compile command
// clang++ -I [Path tho boost include directory] test.cpp

/* OUTPUT
In file included from test.cpp:1:
/boost/1.61.0/include/boost/any.hpp:246:16: error: cannot initialize return object of type 'ExampleClass<int> *'
with an rvalue of type 'const int **'
return operand && operand->type() == boost::typeindex::type_id<ValueType>()
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/boost/1.61.0/include/boost/any.hpp:263:27: note: in instantiation of function template specialization
'boost::any_cast<ExampleClass<int> >' requested here
nonref * result = any_cast<nonref>(&operand);
^
test.cpp:27:34: note: in instantiation of function template specialization 'boost::any_cast<ExampleClass<int> >' requested here
ExampleClass<int> returnedObj = boost::any_cast<ExampleClass<int> >(anyObj);
*/

template<typename T>
class ExampleClass
{
public:
    ExampleClass(const T* p) : ptr(p)
    {
    }

	const T** operator &()
    {
        return &ptr;
    }
	
private:
    const T* ptr;
};


int main(int argc, char *argv[])
{
	ExampleClass<int> obj(new int(10));
	boost::any anyObj (obj);

	ExampleClass<int> returnedObj = boost::any_cast<ExampleClass<int> >(anyObj);
	std::cout << "Returned object is " << *(&returnedObj) << std::endl;
	
	return 0;
}