--- trunk/OOPSE-2.0/src/utils/BitSet.hpp	2005/02/16 19:36:30	2037
+++ trunk/OOPSE-2.0/src/utils/BitSet.hpp	2005/02/17 15:23:56	2043
@@ -81,12 +81,12 @@ class BitSet {
         /** Returns true if no bits are set to true */
         bool none();
 
-        int firstOffBit() { return !bitset_[0] ? 0 : nextOffBit(0); }
+        int firstOffBit() const { return !bitset_[0] ? 0 : nextOffBit(0); }
         
         /** Returns the index of the first bit that is set to false that occurs on or after the specified starting index.*/
         int nextOffBit(int fromIndex) const; 
 
-        int firstOnBit() { return bitset_[0] ? 0 : nextOnBit(0); }
+        int firstOnBit() const { return bitset_[0] ? 0 : nextOnBit(0); }
         
         /** Returns the index of the first bit that is set to true that occurs on or after the specified starting index. */
         int nextOnBit(int fromIndex) const;