From 7f78f9946e918c262a623c292f45075425e9d6c6 Mon Sep 17 00:00:00 2001
From: Menelaos Karavelas <mkaravel@iacm.forth.gr>
Date: Thu, 4 Mar 2010 19:00:46 +0000
Subject: [PATCH] now using the algebraic structure traits; this is the first
 step towards automatizing the method the traits are evaluated

---
 .../CGAL/Segment_Delaunay_graph_traits_2.h    | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_traits_2.h b/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_traits_2.h
index fa46b6e6419..d8830222bb2 100644
--- a/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_traits_2.h
+++ b/Segment_Delaunay_graph_2/include/CGAL/Segment_Delaunay_graph_traits_2.h
@@ -38,10 +38,24 @@ CGAL_BEGIN_NAMESPACE
 //-----------------------------------------------------------------------
 
 // this traits class does support intersecting segments
-template<class R, class MTag = Field_tag>
+
+// the following definition is okay when giving Field_with_sqrt_tag
+// for all other tags I need a specialization
+template<class R,
+	 class MTag =
+	 typename Algebraic_structure_traits<typename R::FT>::Algebraic_category
+	 /*Field_tag*/>
 struct Segment_Delaunay_graph_traits_2
   : public Segment_Delaunay_graph_traits_base_2<R,MTag,Tag_true> {};
 
+template<class R>
+struct Segment_Delaunay_graph_traits_2<R,Field_with_kth_root_tag>
+  : public Segment_Delaunay_graph_traits_base_2<R,Field_with_sqrt_tag,Tag_true> {};
+
+template<class R>
+struct Segment_Delaunay_graph_traits_2<R,Field_with_root_of_tag>
+  : public Segment_Delaunay_graph_traits_base_2<R,Field_with_sqrt_tag,Tag_true> {};
+
 template<class R>
 struct Segment_Delaunay_graph_traits_2<R,Field_tag>
   : public Segment_Delaunay_graph_traits_base_2<R,Integral_domain_without_division_tag,Tag_true> {};
@@ -92,7 +106,10 @@ struct Segment_Delaunay_graph_traits_2<Filtered_kernel<R>,Field_with_sqrt_tag>
 //=========================================================================
 
 // this traits class does NOT support intersecting segments
-template<class R, class MTag = Integral_domain_without_division_tag>
+template<class R,
+	 class MTag = 
+	 typename Algebraic_structure_traits<typename R::FT>::Algebraic_category
+	 /*Integral_domain_without_division_tag*/>
 struct Segment_Delaunay_graph_traits_without_intersections_2
   : public Segment_Delaunay_graph_traits_base_2<R,MTag,Tag_false> {};