#include <iostream>

 using namespace std;

 struct _EmptyList {

   void write() const {}

 };

 template <typename _Item, typename _Next>

 struct _AddNode {

   typedef _Next Next;

   typedef _Item Item;

   const Item item;

   const Next& next;

   _AddNode(const Item& _item, const Next& _next) 

     : item(_item), next(_next) {}

   void write() const {

     next.write();

     cout << item << ' ';

   }

 };

 template <typename _List = _EmptyList>

 struct _Writer {

   typedef _List List;

   const List list;

   _Writer(const List& _list = List()) : list(_list) {}

   template <typename Item> _Writer<_AddNode<Item, List> > add(Item item) const {

     return _Writer<_AddNode<Item, List> >(_AddNode<Item, List>(item, list));

   }

   void write() const {

     list.write();

     cout << endl;

   }

 };

 typedef _Writer<> Writer;

 int main() {

   Writer().add(3).add("alpha").add(4.53).write();

 }