From fb7d892e36e54e45e51f3b05609f6763d571feea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Thu, 6 Apr 2023 19:12:39 +0200
Subject: [PATCH] add help for geom traits for function dealing with polygon
 soups

---
 .../CGAL/boost/graph/named_params_helper.h        | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/BGL/include/CGAL/boost/graph/named_params_helper.h b/BGL/include/CGAL/boost/graph/named_params_helper.h
index 6c438270980..f5b8c44df82 100644
--- a/BGL/include/CGAL/boost/graph/named_params_helper.h
+++ b/BGL/include/CGAL/boost/graph/named_params_helper.h
@@ -344,6 +344,21 @@ public:
   typedef typename CGAL::Identity_property_map<const Dummy_point> const_type;
 };
 
+template <typename PointRange, typename NamedParameters>
+struct GetPolygonSoupGeomTraits
+{
+  typedef typename internal_np::Lookup_named_param_def <
+                     internal_np::geom_traits_t,
+                     NamedParameters,
+                     typename CGAL::Kernel_traits<
+                       typename boost::property_traits<
+                         typename GetPointMap<PointRange, NamedParameters>::type
+                       >::value_type
+                     >::type
+                   > ::type                                                         type;
+};
+
+
 template <class PointRange, class NamedParameters, class PointMap = Default, class NormalMap = Default>
 struct Point_set_processing_3_np_helper
 {