Remove casts to Comparison_result.

They are useless since we merged the various enum types.

Arrangement_of_spheres_3/include/CGAL/Arrangement_of_spheres_3/Sphere_line_intersection.h

@@ -257,7 +257,7 @@ public:
       CGAL::Comparison_result c= compare(pt,Coordinate_index(i));
       if (c != CGAL::EQUAL) {
 	if (line().to_vector()[i] >0) return c;
-	else return CGAL::Comparison_result(-c);
+	else return -c;
       }
     }
     return CGAL::EQUAL;

Arrangement_of_spheres_3/include/CGAL/Arrangement_of_spheres_traits_3.h

@@ -265,7 +265,7 @@ struct Arrangement_of_spheres_traits_3 {
 				  sphere0,
 				  pt,
 				  return CGAL::EQUAL,
-				  return Comparison_result(-cr),
+				  return -cr,
 				  return cr,
 				  return cr,
 				  return cr);
@@ -295,7 +295,7 @@ struct Arrangement_of_spheres_traits_3 {
 				  sphere,
 				  pt,
 				  return CGAL::EQUAL,
-				  return Comparison_result(-crrs),
+				  return -crrs,
 				  return crrs,
 				  return crrs,
 				  return crrs);
@@ -391,7 +391,7 @@ struct Arrangement_of_spheres_traits_3 {
       if (compare_c(sp, p.x(),CGAL_AOS3_INTERNAL_NS::sweep_coordinate()) == EQUAL) return EQUAL;
       if (p.x()>0 && compare_c(sp, p.x(), CGAL_AOS3_INTERNAL_NS::sweep_coordinate()) == LARGER
 	  || p.x()<0 && compare_c(sp, p.x(), CGAL_AOS3_INTERNAL_NS::sweep_coordinate()) == SMALLER ){
-	return Comparison_result(-c0);
+	return -c0;
       } else return c0;
     } else {
       return c0;
@@ -436,7 +436,7 @@ struct Arrangement_of_spheres_traits_3 {
 				    const Sphere_point_3& b,
 				    Coordinate_index C) const {
     if (C != CGAL_AOS3_INTERNAL_NS::sweep_coordinate()) {
-      return Comparison_result(-compare_to_rule_c(b,a.key(),C));
+      return -compare_to_rule_c(b,a.key(),C);
     } else {
       return a.coord().compare_c(b, C);
     }

Cartesian_kernel/include/CGAL/predicates/kernel_ftC2.h

@@ -96,8 +96,7 @@ compare_xC2(const FT &la, const FT &lb, const FT &lc,
   FT den2 = det2x2_by_formula( la, lb, h2a, h2b);
   Sign s = Sign (CGAL_NTS sign(den1) * CGAL_NTS sign(den2));
   CGAL_kernel_assertion( s != ZERO );
-  return Comparison_result( s * sign_of_determinant(num1, 
+  return s * sign_of_determinant(num1, num2, den1, den2);
-                                                       num2, den1, den2));
   */
   FT num1 = det2x2_by_formula( la, lc, h1a, h1c);
   FT num2 = det2x2_by_formula( la, lc, h2a, h2c);

Envelope_3/include/CGAL/Env_plane_traits_3.h

@@ -280,7 +280,7 @@ class Env_plane_traits_3 : public Arr_linear_traits_2<Kernel_>
                 y2 = p2.y();
 
       Sign s2 = CGAL_NTS sign(-b3*x1+a3*y1-(-b3*x2+a3*y2));
-      return (Comparison_result(s1 * s2));
+      return s1 * s2;
     }
 
   };

Envelope_3/include/CGAL/Env_sphere_traits_3.h

@@ -773,9 +773,9 @@ public:
 
       Sign res = CGAL_NTS sign(z1 - z2);
       if (parent.m_is_lower)
-        return Comparison_result(res);
+        return res;
       else
-        return Comparison_result(-res);
+        return -res;
     }
 
     // second method of compare in point
@@ -825,7 +825,7 @@ public:
                                                            Algebraic(1),
                                                            A1,
                                                            A2);
-      return Comparison_result(res);    
+      return res;    
     }  
   };
    
@@ -1034,7 +1034,7 @@ public:
       Sign sign3 = (compare_on_right ? (CGAL_NTS sign(1)) :
                                        (CGAL_NTS sign(-1)));
 
-      return Comparison_result(sign1 * sign2 * sign3);
+      return sign1 * sign2 * sign3;
 
     }
     else if (C1 != 0 && C2 == 0)

Envelope_3/include/CGAL/Env_triangle_traits_3.h

@@ -842,7 +842,7 @@ public:
       FT x1 = p1.x(), y1 = p1.y(), x2 = p2.x(), y2 = p2.y();
 
       Sign s2 = CGAL_NTS sign(-b3*x1+a3*y1-(-b3*x2+a3*y2));
-      return (Comparison_result(s1 * s2));
+      return s1 * s2;
     }  
   };
 

Kinetic_data_structures/include/CGAL/Kinetic/Triangulation_2.h

@@ -513,7 +513,7 @@ public:
 	flip(Edge(f, 1));
       } else {
 	CGAL::Comparison_result cx02= traits_.compare(f->vertex(0)->point(), f->vertex(2)->point(), 0);
-	if (cx02 == CGAL::Comparison_result(-cx12)) {
+	if (cx02 == -cx12) {
 	  flip(Edge(f,2));
 	} else {
 	  flip(Edge(f,0));

Triangulation_3/include/CGAL/predicates/predicates_on_weighted_points_cartesian_3.h

@@ -24,9 +24,7 @@
 #include <CGAL/determinant.h>
 #include <CGAL/enum.h>
 
-//-------------------------------------------------------------------
 CGAL_BEGIN_NAMESPACE
-//-------------------------------------------------------------------
 
 template < class FT >
 Comparison_result
@@ -35,15 +33,14 @@ compare_power_distanceC3(
 		  const FT &qx, const FT &qy, const FT &qz, const FT &qw,
 		  const FT &rx, const FT &ry, const FT &rz, const FT &rw)
 {
- FT dqx = qx - px;
+   FT dqx = qx - px;
- FT dqy = qy - py;
+   FT dqy = qy - py;
- FT dqz = qz - pz;
+   FT dqz = qz - pz;
- FT drx = rx - px;
+   FT drx = rx - px;
- FT dry = ry - py;
+   FT dry = ry - py;
- FT drz = rz - pz;
+   FT drz = rz - pz;
-   return Comparison_result((Sign) CGAL_NTS sign (
+   return CGAL_NTS compare(dqx*dqx + dqy*dqy + dqz*dqz - qw,
-      (dqx*dqx + dqy*dqy + dqz*dqz - qw )
+                           drx*drx + dry*dry + drz*drz - rw);
-    - (drx*drx + dry*dry + drz*drz - rw ) ));
 }