From 522a8b2e4914b5cbdcf56d2f48c5a5f095b58124 Mon Sep 17 00:00:00 2001
From: Simon Giraudot <simon.giraudot@geometryfactory.com>
Date: Wed, 25 Mar 2020 16:17:01 +0100
Subject: [PATCH] Fix implementation getter

---
 BGL/include/CGAL/boost/graph/alpha_expansion_graphcut.h | 2 +-
 BGL/include/CGAL/boost/graph/named_params_helper.h      | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/BGL/include/CGAL/boost/graph/alpha_expansion_graphcut.h b/BGL/include/CGAL/boost/graph/alpha_expansion_graphcut.h
index 9a0b2fe204e..bfe715f5f98 100644
--- a/BGL/include/CGAL/boost/graph/alpha_expansion_graphcut.h
+++ b/BGL/include/CGAL/boost/graph/alpha_expansion_graphcut.h
@@ -539,7 +539,7 @@ double alpha_expansion_graphcut (const InputGraph& input_graph,
   typedef typename GetInitializedVertexIndexMap<InputGraph, NamedParameters>::type VertexIndexMap;
   VertexIndexMap vertex_index_map = CGAL::get_initialized_vertex_index_map(input_graph, np);
 
-  typedef typename GetImplementationTag<NamedParameters, Alpha_expansion_boost_adjacency_list_tag>::type Alpha_expansion;
+  typedef typename GetImplementationTag<NamedParameters>::type Alpha_expansion;
   typedef typename Alpha_expansion::Vertex_descriptor Vertex_descriptor;
 
   Alpha_expansion alpha_expansion;
diff --git a/BGL/include/CGAL/boost/graph/named_params_helper.h b/BGL/include/CGAL/boost/graph/named_params_helper.h
index 1ecf54fd2a2..e4e69b3886e 100644
--- a/BGL/include/CGAL/boost/graph/named_params_helper.h
+++ b/BGL/include/CGAL/boost/graph/named_params_helper.h
@@ -551,14 +551,14 @@ CGAL_DEF_GET_INITIALIZED_INDEX_MAP(face, typename boost::graph_traits<Graph>::fa
     > ::type type;
   };
 
-  template<typename NamedParameters, typename DefaultImplementation>
+  template<typename NamedParameters>
   class GetImplementationTag
   {
   public:
     typedef typename internal_np::Lookup_named_param_def <
     internal_np::implementation_tag_t,
     NamedParameters,
-    DefaultImplementation
+    Alpha_expansion_boost_adjacency_list_tag
     >::type type;
   };
 } //namespace CGAL