Add inequality operators

Octree/doc/Octree/Octree.txt

@@ -13,6 +13,10 @@ An octree is a commonly used data structure that subdivides 3d space.
 The Octree package provides the Octree and Node classes.
 
 \section Section_Octree_Example_Programs Example Programs
+
+\subsection Section_Octree_Example_Point_Set Example for an Octree built from a Point_set_3
+\subsection Section_Octree_Example_Custom_Split_Criterion Example for a Custom Split_criterion
+
 \section Section_Octree_Software_Design Software Design
 
 \subsection Subsection_Octree_Splitting_Rules Splitting Rules

Octree/include/CGAL/Octree.h

@@ -401,7 +401,7 @@ class Octree {
    * \param rhs tree to compare with
    * \return whether the trees have the same topology
    */
-  bool operator==(Octree<PointRange, PointMap> &rhs) const {
+  bool operator==(const Octree<PointRange, PointMap> &rhs) const {
 
     // Identical trees should have the same bounding box
     if (rhs.m_bbox_min != m_bbox_min || rhs.m_bbox_side != m_bbox_side)
@@ -415,6 +415,10 @@ class Octree {
     return rhs.m_root == m_root;
   }
 
+  bool operator!=(const Octree<PointRange, PointMap> &rhs) const {
+    return !operator==(rhs);
+  }
+
   /// @}
 
 

Octree/include/CGAL/Octree/Node.h

@@ -265,6 +265,10 @@ class Node {
     return (location() == rhs.location());
   }
 
+  bool operator!=(const Node &rhs) const {
+    return !operator==(rhs);
+  }
+
   /// @}
 };
 }

Octree/test/Octree/test_octree_equality.cpp

@@ -105,7 +105,7 @@ void test_different_contents_identical_criteria() {
   b.refine(10, 1);
 
   // Check if those trees are considered equal
-  assert(!(a == b));
+  assert(a != b);
 }