+ template <class A, class B>
+ void operator () (const A& a, const B& b)
+ {
+ *this << a << " " << b << std::endl;
+ }
+
+ template <class A, class B, class C>
+ void operator () (const A& a, const B& b, const C& c)
+ {
+ *this << a << " " << b << " " << c << std::endl;
+ }
+
+ template <class A, class B, class C, class D>
+ void operator () (const A& a, const B& b, const C& c, const D& d)
+ {
+ *this << a << " " << b << " " << c << " " << d << std::endl;
+ }
+
+ template <class A, class B, class C, class D, class E>
+ void operator () (const A& a,
+ const B& b,
+ const C& c,
+ const D& d,
+ const E& e)
+ {
+ *this << a << " "
+ << b << " "
+ << c << " "
+ << d << " "
+ << e << std::endl;
+ }
+
+