Templates e geração de código

temp_gen.cpp

class NonTemplated {
	int value;
public:
	using value_type = int;
	NonTemplated(int a) : value(a) {}
	int sum(int a) { return value + a; }
};

template <typename T>
class Templated {
	T value;
public:
	using value_type = T;
	Templated(T a) : value(a) {}
	T sum(T a) { return value + a; }
};
//.....
NonTemplated nt{1};
Templated<int> ti{1};
Templated<double> td{1.0};