remove internal from generated doc

CGAL_ipelets/doc/CGAL_ipelets/examples.txt

@@ -1,4 +1,3 @@
 /*!
-\example CGAL_ipelets/test_grabbers.cpp
 \example CGAL_ipelets/simple_triangulation.cpp
 */

CGAL_ipelets/test/CGAL_ipelets/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Created by the script cgal_create_cmake_script
+# This is the CMake script for compiling a CGAL application.
+
+cmake_minimum_required(VERSION 3.1...3.23)
+project(CGAL_ipelets_Tests)
+
+find_package(CGAL REQUIRED)
+
+# create a target per cppfile
+file(
+  GLOB cppfiles
+  RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp)
+foreach(cppfile ${cppfiles})
+  create_single_source_cgal_program("${cppfile}")
+endforeach()

Mesh_3/include/CGAL/Compact_mesh_cell_base_3.h

@@ -740,7 +740,11 @@ template <typename GT, typename MD>
 class Compact_mesh_cell_base_3<GT, MD, void>
 {
 public:
+#ifdef DOXYGEN_RUNNING
+  typedef unspecified_type                              Triangulation_data_structure;
+#else
   typedef internal::Dummy_tds_3                         Triangulation_data_structure;
+#endif
   typedef Triangulation_data_structure::Vertex_handle   Vertex_handle;
   typedef Triangulation_data_structure::Cell_handle     Cell_handle;
   template <typename TDS2>
@@ -761,7 +765,11 @@ template <typename GT,
 class Compact_mesh_cell_generator_3
 {
 public:
+#ifdef DOXYGEN_RUNNING
+  typedef unspecified_type                              Triangulation_data_structure;
+#else
   typedef internal::Dummy_tds_3                         Triangulation_data_structure;
+#endif
   typedef Triangulation_data_structure::Vertex_handle   Vertex_handle;
   typedef Triangulation_data_structure::Cell_handle     Cell_handle;
   template <typename TDS2>

Mesh_3/include/CGAL/Mesh_domain_with_polyline_features_3.h

@@ -549,11 +549,15 @@ public:
   typedef int                                        Curve_index;
   typedef int                                        Corner_index;
 
+#ifdef DOXYGEN_RUNNING
+  typedef unspecified_type                           Index;
+#else
   typedef typename Mesh_3::internal::Index_generator_with_features<
     typename MeshDomain_3::Subdomain_index,
     Surface_patch_index,
     Curve_index,
     Corner_index>::type                              Index;
+#endif
 
   typedef CGAL::Tag_true                             Has_features;
   typedef typename MeshDomain_3::R::FT               FT;

Mesh_3/include/CGAL/Mesh_vertex_base_3.h

@@ -317,7 +317,11 @@ template<class GT,
          class MD,
          class Vb = Regular_triangulation_vertex_base_3<GT> >
 struct Mesh_vertex_base_3 {
+#ifdef DOXYGEN_RUNNING
+  using Triangulation_data_structure = unspecified_type;
+#else
   using Triangulation_data_structure = internal::Dummy_tds_3;
+#endif
   using Vertex_handle = typename Triangulation_data_structure::Vertex_handle;
   using Cell_handle = typename Triangulation_data_structure::Cell_handle;
 
@@ -335,7 +339,11 @@ template<class GT,
          class Index,
          class Vb = Regular_triangulation_vertex_base_3<GT> >
 struct Mesh_vertex_generator_3 {
+#ifdef DOXYGEN_RUNNING
+  using Triangulation_data_structure = unspecified_type;
+#else
   using Triangulation_data_structure = internal::Dummy_tds_3;
+#endif
   using Vertex_handle = typename Triangulation_data_structure::Vertex_handle;
   using Cell_handle = typename Triangulation_data_structure::Cell_handle;
 

Set_movable_separability_2/examples/Set_movable_separability_2/is_pullout_direction_single_mold_trans_cast.cpp

@@ -12,6 +12,17 @@ typedef CGAL::Polygon_2<Kernel>                           Polygon_2;
 namespace SMS = CGAL::Set_movable_separability_2;
 namespace casting = SMS::Single_mold_translational_casting;
 
+template <typename Kernel>
+inline std::pair<typename Kernel::Direction_2, typename Kernel::Direction_2>
+get_segment_outer_circle(const typename Kernel::Segment_2 seg,
+                         const CGAL::Orientation orientation)
+{
+  typename Kernel::Direction_2 forward( seg);
+  typename Kernel::Direction_2 backward(-forward);
+  return (orientation == CGAL::CLOCKWISE) ?
+    std::make_pair(backward, forward) : std::make_pair(forward, backward);
+}
+
 // The main program:
 int main(int  argc, char* argv[])
 {
@@ -33,8 +44,7 @@ int main(int  argc, char* argv[])
          ++index)
   {
     auto orientation = polygon.orientation();
-    auto segment_outer_circle =
-      SMS::internal::get_segment_outer_circle<Kernel>(*e_it, orientation);
+    auto segment_outer_circle = get_segment_outer_circle<Kernel>(*e_it, orientation);
     auto d = segment_outer_circle.first;
     d = d.perpendicular(CGAL::CLOCKWISE);
     auto res = casting::is_pullout_direction(polygon, e_it, d);

Solver_interface/include/CGAL/Eigen_solver_traits.h

@@ -242,7 +242,12 @@ class Eigen_solver_traits<Eigen::BiCGSTAB<Eigen_sparse_matrix<double>::EigenType
 public:
   typedef EigenSolverT                                                  Solver;
   typedef Scalar                                                        NT;
+#ifdef DOXYGEN_RUNNING
+  typedef unspecified_type                                              Matrix;
+#else
   typedef internal::Get_eigen_matrix<EigenSolverT,NT>::type             Matrix;
+#endif
+
   typedef Eigen_vector<Scalar>                                          Vector;
 
   // Public operations

Surface_mesh/include/CGAL/Surface_mesh/Surface_mesh.h

@@ -2718,6 +2718,7 @@ collect_garbage(Visitor &visitor)
     garbage_ = false;
 }
 
+#ifndef DOXYGEN_RUNNING
 namespace collect_garbage_internal {
 struct Dummy_visitor{
   template<typename A, typename B, typename C>
@@ -2726,6 +2727,7 @@ struct Dummy_visitor{
 };
 
 }
+#endif
 
 template <typename P>
 void