1 files changed, 61 insertions, 0 deletions
diff --git a/Carpet/CarpetLib/src/bbox.hh b/Carpet/CarpetLib/src/bbox.hh
index 2847576b5..85af2fcd3 100644
--- a/Carpet/CarpetLib/src/bbox.hh
+++ b/Carpet/CarpetLib/src/bbox.hh
@@ -3,6 +3,7 @@
 
 #include <cassert>
 #include <cstdlib>
+#include <functional>
 #include <iostream>
 #include <limits>
 
@@ -271,4 +272,64 @@ inline ostream& operator<< (ostream& os, const bbox<T,D>& b) {
 
 
 
+// Comparison
+
+namespace std {
+  // ==
+  template<typename T, int D>
+  struct equal_to<bbox<T,D> >: binary_function<bbox<T,D>, bbox<T,D>, bool>
+  {
+    bool operator()(const bbox<T,D>& x, const bbox<T,D>& y) const;
+  };
+  
+  // <
+  template<typename T, int D>
+  struct less<bbox<T,D> >: binary_function<bbox<T,D>, bbox<T,D>, bool>
+  {
+    bool operator()(const bbox<T,D>& x, const bbox<T,D>& y) const;
+  };
+  
+  // >
+  template<typename T, int D>
+  struct greater<bbox<T,D> >: binary_function<bbox<T,D>, bbox<T,D>, bool>
+  {
+    bool operator()(const bbox<T,D>& x, const bbox<T,D>& y) const
+    {
+      return less<bbox<T,D> >()(y, x);
+    }
+  };
+  
+  // >=
+  template<typename T, int D>
+  struct greater_equal<bbox<T,D> >: binary_function<bbox<T,D>, bbox<T,D>, bool>
+  {
+    bool operator()(const bbox<T,D>& x, const bbox<T,D>& y) const
+    {
+      return not less<bbox<T,D> >()(x, y);
+    }
+  };
+  
+  // <=
+  template<typename T, int D>
+  struct less_equal<bbox<T,D> >: binary_function<bbox<T,D>, bbox<T,D>, bool>
+  {
+    bool operator()(const bbox<T,D>& x, const bbox<T,D>& y) const
+    {
+      return not greater<bbox<T,D> >()(x, y);
+    }
+  };
+  
+  // !=
+  template<typename T, int D>
+  struct not_equal_to<bbox<T,D> >: binary_function<bbox<T,D>, bbox<T,D>, bool>
+  {
+    bool operator()(const bbox<T,D>& x, const bbox<T,D>& y) const
+    {
+      return not equal_to<bbox<T,D> >()(x, y);
+    }
+  };
+}
+
+
+
 #endif // BBOX_HH