--- a/include/orderlist.h	Mon Dec 25 12:28:13 2006 -0500
+++ b/include/orderlist.h	Fri Dec 29 18:20:50 2006 -0500
@@ -105,6 +105,7 @@
 	public:
 		typedef			typename OrderList<T>::const_iterator		ComparableType;				
 		int 			compare(ComparableType a, ComparableType b) const;				/// (-1,0,1) = a (precedes, ==, succeeds) b 
+		bool			operator()(ComparableType a, ComparableType b) const;
 };
 
 /// Structure storing auxilliary information requred for each node of OrderList

--- a/include/orderlist.hpp	Mon Dec 25 12:28:13 2006 -0500
+++ b/include/orderlist.hpp	Fri Dec 29 18:20:50 2006 -0500
@@ -108,3 +108,11 @@
 	if (a.get_base()->tag < b.get_base()->tag)			return -1;
 	return 1;
 }
+
+template<class T>
+bool
+OrderList<T>::OrderComparison::
+operator()(ComparableType a, ComparableType b) const
+{
+	return (compare(a,b) < 0);
+}

--- a/tests/test-orderlist.cpp	Mon Dec 25 12:28:13 2006 -0500
+++ b/tests/test-orderlist.cpp	Fri Dec 29 18:20:50 2006 -0500
@@ -1,7 +1,7 @@
 #include "orderlist.h"
 #include <iostream>
 
-typedef OrderList<int> 					OList;
+typedef OrderList<int> 				OList;
 typedef OList::OrderComparison		Comparison;
 typedef OList::iterator 			iterator;
 
@@ -42,4 +42,8 @@
 	std::cout << "60 < 40: " << cmp.compare(i60,i40) << std::endl;
 	std::cout << "50 < 70: " << cmp.compare(i50,i70) << std::endl;
 	std::cout << "60 < 70: " << cmp.compare(i60,i70) << std::endl;
+	std::cout << std::endl;
+	
+	std::cout << "60 < 40: " << cmp(i60, i40) << std::endl;
+	std::cout << "60 < 70: " << cmp(i60, i70) << std::endl;
 }