Vector_2 and Vector_3 now also provide a Cartesian_const_iterator.

Cartesian_kernel/include/CGAL/Cartesian/Vector_2.h

@@ -48,7 +48,9 @@ class VectorC2
 
 public:
 
-  typedef R_                                     R;
+  typedef typename Rep::const_iterator      Cartesian_const_iterator;
+
+  typedef R_                                R;
 
   VectorC2() {}
  
@@ -84,6 +86,16 @@ public:
     return constant<FT, 1>();
   }
 
+  Cartesian_const_iterator cartesian_begin() const
+  {
+    return get(base).begin();
+  }
+
+  Cartesian_const_iterator cartesian_end() const
+  {
+    return get(base).end();
+  }
+
 };
 
 template < class R >

Cartesian_kernel/include/CGAL/Cartesian/Vector_3.h

@@ -47,7 +47,9 @@ class VectorC3
 
 public:
 
-  typedef R_                                     R;
+  typedef typename Rep::const_iterator      Cartesian_const_iterator;
+
+  typedef R_                                R;
 
   VectorC3() {}
 
@@ -103,6 +105,16 @@ public:
       return constant<FT, 1>();
   }
 
+  Cartesian_const_iterator cartesian_begin() const
+  {
+    return get(base).begin();
+  }
+
+  Cartesian_const_iterator cartesian_end() const
+  {
+    return get(base).end();
+  }
+
   const FT & cartesian(int i) const;
   const FT & operator[](int i) const;
   const FT & homogeneous(int i) const;