remove Default_constrained_Delaunay_triangulation_3

`Constrained_Delaunay_triangulation_3<Traits>` is the default.

Constrained_triangulation_3/doc/Constrained_triangulation_3/PackageDescription.txt

@@ -37,8 +37,6 @@
 `CGAL::make_constrained_Delaunay_triangulation_3()` is the main function to create
 a constrained Delaunay triangulation in 3D, an instance of the class template
 `CGAL::Constrained_Delaunay_triangulation_3`.
-The type alias `CGAL::Default_constrained_Delaunay_triangulation_3<Kernel>` is the default
-constrained triangulation class.
 
 \cgalCRPSection{Functions Templates}
 
@@ -52,7 +50,6 @@ constrained triangulation class.
 
 \cgalCRPSubsection{Class Templates}
 
-- `CGAL::Default_constrained_Delaunay_triangulation_3<Kernel>`
 - `CGAL::Constrained_Delaunay_triangulation_3<Traits, Triangulation>`
 - `CGAL::Constrained_Delaunay_triangulation_vertex_base_3<Traits, Vertex_base>`
 - `CGAL::Constrained_Delaunay_triangulation_cell_base_3<Traits, Cell_base>`

Constrained_triangulation_3/examples/Constrained_triangulation_3/remesh_constrained_Delaunay_triangulation_3.cpp

@@ -29,7 +29,9 @@ int main(int argc, char* argv[])
     return EXIT_FAILURE;
   }
   CDT cdt = CGAL::make_constrained_Delaunay_triangulation_3<CDT>(mesh);
+  //! [move cdt to tr]
   Tr tr = std::move(cdt).triangulation();
+  //! [move cdt to tr]
   std::cout << "Number of vertices in tr: "
             << tr.number_of_vertices() << std::endl;
   CGAL::tetrahedral_isotropic_remeshing(tr, 0.1,

Constrained_triangulation_3/include/CGAL/Constrained_Delaunay_triangulation_3.h

@@ -462,6 +462,13 @@ class Constrained_Delaunay_triangulation_3_impl;
 
 #endif // not DOXYGEN_RUNNING
 
+template <typename Traits,
+          typename Triangulation =
+              Triangulation_3<Traits,
+                              Triangulation_data_structure_3<Constrained_Delaunay_triangulation_vertex_base_3<Traits>,
+                                                             Constrained_Delaunay_triangulation_cell_base_3<Traits>>>>
+class Constrained_Delaunay_triangulation_3;
+
 /*!
  * \ingroup PkgCT_3Classes
  * \brief This class template represents a 3D constrained Delaunay triangulation.

Constrained_triangulation_3/include/CGAL/make_constrained_Delaunay_triangulation_3.h

@@ -46,19 +46,10 @@ struct Default_constrained_Delaunay_triangulation_3_type_generator
   using Tr = Triangulation_3<Traits, Tds>;
   using type = Constrained_Delaunay_triangulation_3<Traits, Tr>;
 };
-#endif // DOXYGEN_RUNNING
-
-/*!
- * \ingroup PkgCT_3Classes
- * \brief The default 3D constrained Delaunay triangulation type.
- * \tparam Traits a geometric traits class.
- *
- * This alias template names the default 3D constrained Delaunay triangulation
- * type for a given geometric traits class.
- *
- */
 template <typename Traits>
-using Default_constrained_Delaunay_triangulation_3 = Constrained_Delaunay_triangulation_3<Traits, Triangulation_3<Traits, Triangulation_data_structure_3<Constrained_Delaunay_triangulation_vertex_base_3<Traits>, Constrained_Delaunay_triangulation_cell_base_3<Traits>>>>;
+using Default_constrained_Delaunay_triangulation_3 = Constrained_Delaunay_triangulation_3<Traits>;
+
+#endif // DOXYGEN_RUNNING
 
 /*!
  * \ingroup PkgCT_3Functions
@@ -87,7 +78,7 @@ using Default_constrained_Delaunay_triangulation_3 = Constrained_Delaunay_triang
  *
  * If `Triangulation` is `CGAL::Default`, the geometric traits `Traits` is deduced from the polygon mesh type
  * `PolygonMesh` and the named parameters `NamedParameters`. And then the default constrained Delaunay triangulation is
- * `CGAL::Default_constrained_Delaunay_triangulation_3<Traits>`.
+ * `CGAL::Constrained_Delaunay_triangulation_3<Traits>`.
  *
  * \param mesh The polygon mesh representing the constraints.
  * \param np an optional sequence of \ref bgl_namedparameters "Named Parameters" among the ones listed below
@@ -136,7 +127,7 @@ auto make_constrained_Delaunay_triangulation_3(const PolygonMesh& mesh,
 {
   using Mesh_geom_traits = typename GetGeomTraits<PolygonMesh, CGAL_NP_CLASS>::type;
   using CDT = typename CGAL::Default::Get<Triangulation,
-                                          Default_constrained_Delaunay_triangulation_3<Mesh_geom_traits>>::type;
+                                          Constrained_Delaunay_triangulation_3<Mesh_geom_traits>>::type;
   CDT cdt(mesh, np);
   auto remeshing_cdt{std::move(cdt).convert_for_remeshing()};
   static_assert(std::is_same_v<decltype(remeshing_cdt), CDT>);
@@ -172,7 +163,7 @@ auto make_constrained_Delaunay_triangulation_3(const PolygonMesh& mesh,
  *
  * If `Triangulation` is `CGAL::Default`, the geometric traits `Traits` is deduced from the point type
  * in `PointRange` and the named parameters `NamedParameters`. And then the default constrained Delaunay triangulation
- * is `CGAL::Default_constrained_Delaunay_triangulation_3<Traits>`.
+ * is `CGAL::Constrained_Delaunay_triangulation_3<Traits>`.
  *
  * \param points a range of points representing the vertices of the polygon soup
  * \param polygons a range of ranges of indices representing the faces of the polygon soup
@@ -229,7 +220,7 @@ auto make_constrained_Delaunay_triangulation_3(const PointRange& points,
 
   using Geom_traits = decltype(get_geom_traits_type());
   using CDT =
-      typename CGAL::Default::Get<Triangulation, Default_constrained_Delaunay_triangulation_3<Geom_traits>>::type;
+      typename CGAL::Default::Get<Triangulation, Constrained_Delaunay_triangulation_3<Geom_traits>>::type;
   CDT cdt(points, polygons, np);
   auto remeshing_cdt{std::move(cdt).convert_for_remeshing()};
   static_assert(std::is_same_v<decltype(remeshing_cdt), CDT>);

Constrained_triangulation_3/test/Constrained_triangulation_3/test_constrained_Delaunay_triangulation_3.cpp

@@ -1,11 +1,12 @@
 #include <CGAL/make_constrained_Delaunay_triangulation_3.h>
+#include <CGAL/Constrained_Delaunay_triangulation_3.h>
 #include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
 #include <CGAL/Surface_mesh.h>
 
 #include <algorithm>
 
 using K = CGAL::Exact_predicates_inexact_constructions_kernel;
-using CDT = CGAL::Default_constrained_Delaunay_triangulation_3_type_generator<K>::type;
+using CDT = CGAL::Constrained_Delaunay_triangulation_3<K>;
 
 int main(int argc, char* argv[])
 {