From 68044a6ede1f16fbf5184afff2364863cf5c73e2 Mon Sep 17 00:00:00 2001
From: Lingjie Zhu <lingjie.zhu@nlpr.ia.ac.cn>
Date: Fri, 18 Aug 2017 22:46:00 +0800
Subject: [PATCH] add named function parameters

---
 .../named_function_params.h                   | 101 ++++++++++++++++++
 .../parameters_interface.h                    |   8 ++
 2 files changed, 109 insertions(+)
 create mode 100644 Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/named_function_params.h
 create mode 100644 Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/parameters_interface.h

diff --git a/Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/named_function_params.h b/Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/named_function_params.h
new file mode 100644
index 00000000000..0cd97fc5169
--- /dev/null
+++ b/Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/named_function_params.h
@@ -0,0 +1,101 @@
+#ifndef CGAL_VSA_BGL_NAMED_FUNCTION_PARAMS_H
+#define CGAL_VSA_BGL_NAMED_FUNCTION_PARAMS_H
+
+#include <CGAL/boost/graph/named_function_params.h>
+
+namespace CGAL{
+namespace internal_np{
+
+// define enum types and values for new named parameters
+#define CGAL_add_named_parameter(X, Y, Z)            \
+  enum X { Y };
+#include <CGAL/Surface_mesh_approximation/internal/parameters_interface.h>
+#undef CGAL_add_named_parameter
+
+}//internal_np
+
+  template <typename T, typename Tag, typename Base = boost::no_property>
+  struct vsa_bgl_named_params
+    : CGAL::cgal_bgl_named_params<T, Tag, Base>
+  {
+    typedef CGAL::cgal_bgl_named_params<T, Tag, Base> base;
+    typedef vsa_bgl_named_params self;
+
+    vsa_bgl_named_params(T v = T()) : base(v) {}
+    vsa_bgl_named_params(T v, const Base& b) : base(v, b) {}
+
+// define the functions for new named parameters and the one imported from BGL and boost
+// used to concatenate several parameters
+#define CGAL_add_named_parameter(X, Y, Z)              \
+  template<typename K>                               \
+  vsa_bgl_named_params<K, internal_np::X, self>                   \
+  Z(const K& k) const                                \
+  {                                                  \
+    typedef vsa_bgl_named_params<K, internal_np::X, self> Params; \
+    return Params(k, *this);                         \
+  }
+#include <CGAL/Surface_mesh_approximation/internal/parameters_interface.h>
+#include <CGAL/boost/graph/parameters_interface.h>
+#include <CGAL/boost/graph/boost_parameters_interface.h>
+#undef CGAL_add_named_parameter
+  };
+
+namespace VSA{
+
+namespace parameters{
+
+// define free functions for new named parameters and the one imported from BGL and boost
+#define CGAL_add_named_parameter(X, Y, Z)          \
+  template<typename K>                           \
+  vsa_bgl_named_params<K, internal_np::X>                     \
+  Z(const K& k)                                  \
+  {                                              \
+    typedef vsa_bgl_named_params<K, internal_np::X> Params;   \
+    return Params(k);                            \
+  }
+#include <CGAL/boost/graph/boost_parameters_interface.h>
+#include <CGAL/boost/graph/parameters_interface.h>
+#include <CGAL/Surface_mesh_approximation/internal/parameters_interface.h>
+#undef CGAL_add_named_parameter
+} //namespace parameters
+} //namespace VSA
+
+} //namespace CGAL
+
+// partial specializations hate inheritance and we need to repeat
+// those here. this is rather fragile.
+namespace boost {
+#if BOOST_VERSION < 105100
+  template <class Tag1, class Tag2, class T1, class Base>
+  inline
+  typename property_value< CGAL::vsa_bgl_named_params<T1,Tag1,Base>, Tag2>::type
+  get_param(const CGAL::vsa_bgl_named_params<T1,Tag1,Base>& p, Tag2 tag2)
+  {
+    enum { match = detail::same_property<Tag1,Tag2>::value };
+    typedef typename
+      boost::property_value< CGAL::vsa_bgl_named_params<T1,Tag1,Base>, Tag2>::type T2;
+    T2* t2 = 0;
+    typedef detail::property_value_dispatch<match> Dispatcher;
+    return Dispatcher::const_get_value(p, t2, tag2);
+  }
+#endif
+
+  template <typename T, typename Tag, typename Base, typename Def>
+  struct lookup_named_param_def<Tag, CGAL::vsa_bgl_named_params<T, Tag, Base>, Def> {
+    typedef T type;
+    static const type& get(const bgl_named_params<T, Tag, Base>& p, const Def&) {
+      return p.m_value;
+    }
+  };
+
+  template <typename Tag1, typename T, typename Tag, typename Base, typename Def>
+  struct lookup_named_param_def<Tag1, CGAL::vsa_bgl_named_params<T, Tag, Base>, Def> {
+    typedef typename lookup_named_param_def<Tag1, Base, Def>::type type;
+    static const type& get(const bgl_named_params<T, Tag, Base>& p, const Def& def) {
+      return lookup_named_param_def<Tag1, Base, Def>::get(p.m_base, def);
+    }
+  };
+
+} // boost
+
+#endif //CGAL_VSA_BGL_NAMED_FUNCTION_PARAMS_H
diff --git a/Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/parameters_interface.h b/Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/parameters_interface.h
new file mode 100644
index 00000000000..24f223f021f
--- /dev/null
+++ b/Surface_mesh_approximation/include/CGAL/internal/Surface_mesh_approximation/parameters_interface.h
@@ -0,0 +1,8 @@
+// List of named parameters used in the Polygon Mesh Processing package
+// CGAL_add_named_parameter(geom_traits_t, geom_traits, geom_traits)
+CGAL_add_named_parameter(number_of_iterations_t, number_of_iterations, number_of_iterations)
+CGAL_add_named_parameter(number_of_proxies_t, number_of_proxies, number_of_proxies)
+CGAL_add_named_parameter(face_area_t, face_area, face_area_map)
+CGAL_add_named_parameter(face_normal_t, face_normal, face_normal_map)
+CGAL_add_named_parameter(face_center_t, face_center, face_center_map)
+CGAL_add_named_parameter(face_proxy_t, face_proxy, face_proxy_map)