message: fonction was renamed between 5.1 and 5.2
diff: @@ -82,6 +82,7 @@ class Alpha_kernel_d<Kernel, true> {
  private:
  // Kernel for functions access.
  Kernel kernel_;
  +
  public:
  // Fake type for compilation to succeed (cf. std::conditional in Alpha_complex.h)
  using Point_d = void;
  @@ -98,7 +99,13 @@ class Alpha_kernel_d<Kernel, true> {
  template<class PointIterator>
  Sphere get_sphere(PointIterator begin, PointIterator end) const {
  + // power_center_d_object has been renamed between CGAL 5.1 and 5.2
  +#if defined CGAL_VERSION_NR >= 1050101000 && defined CGAL_VERSION_NR < 1050201000
  return kernel_.power_center_d_object()(begin, end);
  +#endif
  +#if CGAL_VERSION_NR >= 1050201000
  + return kernel_.construct_power_sphere_d_object()(begin, end);
  +#endif
  }
  template<class PointIterator>
  @@ -112,7 +119,13 @@ class Alpha_kernel_d<Kernel, true> {
  }
  bool is_gabriel(const Sphere& circumcenter, const Weighted_point_d& point) {
  + // power_center_d_object has been renamed between CGAL 5.1 and 5.2
  +#if defined CGAL_VERSION_NR >= 1050101000 && defined CGAL_VERSION_NR < 1050201000
  return kernel_.power_distance_d_object()(circumcenter, point) >= 0;
  +#endif
  +#if CGAL_VERSION_NR >= 1050201000
  + return kernel_.compute_power_product_d_object()(circumcenter, point) >= 0;
  +#endif
  }
  };
  