Update kernel

include_std/utility

@@ -26,4 +26,29 @@ namespace std
 	{
 		return static_cast<typename std::remove_reference<T>::type &&>(arg);
 	}
+
+	template <typename T1, typename T2>
+	struct pair
+	{
+		typedef T1 first_type;
+		typedef T2 second_type;
+
+		T1 first;
+		T2 second;
+
+		pair() : first(T1()), second(T2()) {}
+		pair(const T1 &x, const T2 &y) : first(x), second(y) {}
+	};
+
+	template <typename T1, typename T2>
+	pair<T1, T2> make_pair(T1 x, T2 y)
+	{
+		return pair<T1, T2>(x, y);
+	}
+
+	template <class T>
+	T &&forward(typename std::remove_reference<T>::type &arg)
+	{
+		return static_cast<T &&>(arg);
+	}
 }