CRTP inheritance with static fields

orm.cpp

#include <iostream>
#include <map>
#include <string>
#include <list>
using namespace std;

// =========== Classe de base: caché a l'utilisateur  ==================================
template <typename T>
class Base
{
public:
	void save() {

		for (auto & i : metadatas)
			cout<<i.first<<" "<<i.second<<" "<<endl;

	};

	list<T> all() {};


	static map<string, int> metadatas;

};
#define REGISTER_FIELDS(ClassName,...) template<> map<string, int> Base<ClassName>::metadatas = {__VA_ARGS__};


// L'utilisateur créer des class ====================================================
class User: public Base<User>
{

};
REGISTER_FIELDS (User, {"AGE",32},{"TRUC",23})

class Comment: public Base<Comment>
{

};


REGISTER_FIELDS (Comment, {"POINT",12},{"NOTE",23})


int main(int argc, char **argv)
{

	User user; 
	user.save(); 

	Comment comm;
	comm.save();
	

}