From 75aca45157ffba2d3d0ce1e1302b6287ebd6fc3a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Sat, 24 Nov 2018 18:40:15 +0100
Subject: [PATCH] do no ignore user provided traits

---
 BGL/include/CGAL/boost/graph/named_params_helper.h | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/BGL/include/CGAL/boost/graph/named_params_helper.h b/BGL/include/CGAL/boost/graph/named_params_helper.h
index 517a750d901..cbf5a2fedce 100644
--- a/BGL/include/CGAL/boost/graph/named_params_helper.h
+++ b/BGL/include/CGAL/boost/graph/named_params_helper.h
@@ -325,11 +325,17 @@ namespace CGAL {
     template<typename PointRange, typename NamedParameters>
     class GetK
     {
-      typedef typename boost::property_traits<
-        typename GetPointMap<PointRange, NamedParameters>::type
-        >::value_type Point;
+      typedef typename GetPointMap<PointRange, NamedParameters>::type Vpm;
+      typedef typename Kernel_traits<
+        typename boost::property_traits<Vpm>::value_type
+      >::Kernel Default_kernel;
+
     public:
-      typedef typename CGAL::Kernel_traits<Point>::Kernel Kernel;
+      typedef typename boost::lookup_named_param_def <
+        internal_np::geom_traits_t,
+        NamedParameters,
+        Default_kernel
+      > ::type  Kernel;
     };
 
     template<typename PointRange, typename NamedParameters>