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+// Copyright 2008, 2009 Brady J. Garvin
+
+// This file is part of Covering Arrays by Simulated Annealing (CASA).
+
+// CASA is free software: you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// CASA is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with CASA. If not, see <http://www.gnu.org/licenses/>.
+
+
+#ifndef ILESS_H
+#define ILESS_H
+
+// Compares two indices by the elements in an array at those locations. Returns
+// true if the left indexth element is less than the right indexth element.
+
+template<class T>class iless {
+protected:
+ const T* array;
+public:
+ iless(const T*array) :
+ array(array) {}
+ bool operator ()(unsigned left, unsigned right) const {
+ return array[left] < array[right];
+ }
+};
+
+#endif