From e208720200ae4f1faeddbd278956ba32f2714a66 Mon Sep 17 00:00:00 2001
From: Sylvain Pion <Sylvain.Pion@sophia.inria.fr>
Date: Mon, 31 Jul 2006 15:52:21 +0000
Subject: [PATCH] Comment out compare_deltax_deltay() predicate, as it is
 undocumented, unused in CGAL, and does not have corresponding functor.

---
 .../include/CGAL/Cartesian/predicates_on_points_2.h            | 3 +++
 Cartesian_kernel/include/CGAL/predicates/kernel_ftC2.h         | 3 +++
 .../include/CGAL/Homogeneous/predicates_on_pointsH2.h          | 3 +++
 .../test/Kernel_23/include/CGAL/_test_further_fct_point_2.h    | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/Cartesian_kernel/include/CGAL/Cartesian/predicates_on_points_2.h b/Cartesian_kernel/include/CGAL/Cartesian/predicates_on_points_2.h
index 4195c47f748..e5705b4d4ad 100644
--- a/Cartesian_kernel/include/CGAL/Cartesian/predicates_on_points_2.h
+++ b/Cartesian_kernel/include/CGAL/Cartesian/predicates_on_points_2.h
@@ -37,6 +37,8 @@ equal_xy(const PointC2<K> &p, const PointC2<K> &q)
   return p.x() == q.x() && p.y() == q.y();
 }
 
+#if 0
+// Unused, undocumented, un-functorized.
 template < class K >
 inline
 Comparison_result
@@ -47,6 +49,7 @@ compare_deltax_deltay(const PointC2<K>& p,
 {
   return compare_deltax_deltayC2(p.x(), q.x(), r.y(), s.y());
 }
+#endif
 
 template < class K >
 inline
diff --git a/Cartesian_kernel/include/CGAL/predicates/kernel_ftC2.h b/Cartesian_kernel/include/CGAL/predicates/kernel_ftC2.h
index 3a5653ad1d9..94ef1dc7287 100644
--- a/Cartesian_kernel/include/CGAL/predicates/kernel_ftC2.h
+++ b/Cartesian_kernel/include/CGAL/predicates/kernel_ftC2.h
@@ -380,6 +380,8 @@ compare_slopesC2(const FT &s1_src_x, const FT &s1_src_y, const FT &s1_tgt_x,
 }
 
 
+#if 0
+// Unused, undocumented, un-functorized.
 template < class FT >
 inline
 typename Compare<FT>::result_type
@@ -388,6 +390,7 @@ compare_deltax_deltayC2(const FT &px, const FT &qx,
 {
   return CGAL_NTS compare(CGAL_NTS abs(px-qx), CGAL_NTS abs(ry-sy));
 }
+#endif
 
 template < class FT >
 inline
diff --git a/Homogeneous_kernel/include/CGAL/Homogeneous/predicates_on_pointsH2.h b/Homogeneous_kernel/include/CGAL/Homogeneous/predicates_on_pointsH2.h
index 1bbe631ea49..e6887965820 100644
--- a/Homogeneous_kernel/include/CGAL/Homogeneous/predicates_on_pointsH2.h
+++ b/Homogeneous_kernel/include/CGAL/Homogeneous/predicates_on_pointsH2.h
@@ -86,6 +86,8 @@ _where_wrt_L_wedge( const PointH2<R>& p, const PointH2<R>& q )
   return ON_ORIENTED_BOUNDARY;
 }
 
+#if 0
+// Unused, undocumented, un-functorized.
 template < class R >
 CGAL_KERNEL_MEDIUM_INLINE
 Comparison_result
@@ -98,6 +100,7 @@ compare_deltax_deltay(const PointH2<R>& p,
                   CGAL_NTS abs(p.hx()*q.hw() - q.hx()*p.hw()) * r.hw()*s.hw(),
                   CGAL_NTS abs(r.hy()*s.hw() - s.hy()*r.hw()) * p.hw()*q.hw());
 }
+#endif
 
 CGAL_END_NAMESPACE
 
diff --git a/Kernel_23/test/Kernel_23/include/CGAL/_test_further_fct_point_2.h b/Kernel_23/test/Kernel_23/include/CGAL/_test_further_fct_point_2.h
index 734cbef7dfa..0de386645ae 100644
--- a/Kernel_23/test/Kernel_23/include/CGAL/_test_further_fct_point_2.h
+++ b/Kernel_23/test/Kernel_23/include/CGAL/_test_further_fct_point_2.h
@@ -41,12 +41,15 @@ _test_further_fct_point_2(const R& )
  CGAL::Point_2<R> p8( RT(24), RT( 9), RT(3) );  // ( 8, 3)
  CGAL::Point_2<R> p9( RT( 6), RT(10), RT(1) );  // ( 6,10)
 
+#if 0
+ // This function is not documented, not used in CGAL, and has no functor.
  assert( CGAL::compare_deltax_deltay( p1, p4, p5, p6) == CGAL::SMALLER);
  assert( CGAL::compare_deltax_deltay( p5, p6, p2, p1) == CGAL::LARGER);
  assert( CGAL::compare_deltax_deltay( p6, p5, p2, p1) == CGAL::LARGER);
  assert( CGAL::compare_deltax_deltay( p1, p2, p5, p6) == CGAL::SMALLER);
  assert( CGAL::compare_deltax_deltay( p4, p3, p3, p7) == CGAL::EQUAL);
  assert( CGAL::compare_deltax_deltay( p2, p3, p3, p6) == CGAL::EQUAL);
+#endif
 
  std::cout << '.';