From 8b464899d741ec4bfc59cd57729d2d688de87752 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mael=20Rouxel-Labb=C3=A9?=
 <mael.rouxel.labbe@geometryfactory.com>
Date: Fri, 21 Oct 2016 12:13:16 +0200
Subject: [PATCH] Added boost::hash overloads for the other Surface_mesh
 index-based classes

---
 .../include/CGAL/Surface_mesh/Surface_mesh.h  | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Surface_mesh/include/CGAL/Surface_mesh/Surface_mesh.h b/Surface_mesh/include/CGAL/Surface_mesh/Surface_mesh.h
index db896daa486..0aa1e98a00f 100644
--- a/Surface_mesh/include/CGAL/Surface_mesh/Surface_mesh.h
+++ b/Surface_mesh/include/CGAL/Surface_mesh/Surface_mesh.h
@@ -2633,6 +2633,30 @@ namespace boost {
     }
   };
 
+  template <>
+  struct hash<CGAL::SM_Halfedge_index > {
+    std::size_t operator()(const CGAL::SM_Halfedge_index& i) const
+    {
+      return i;
+    }
+  };
+
+  template <>
+  struct hash<CGAL::SM_Edge_index > {
+    std::size_t operator()(const CGAL::SM_Edge_index& i) const
+    {
+      return i;
+    }
+  };
+
+  template <>
+  struct hash<CGAL::SM_Face_index > {
+    std::size_t operator()(const CGAL::SM_Face_index& i) const
+    {
+      return i;
+    }
+  };
+
 } // namespace boost
 
 #endif /* CGAL_SURFACE_MESH_H */