From 560f02c921aab01856605232120b115e25ffbd20 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Wed, 6 Dec 2023 15:29:17 +0100
Subject: [PATCH 1/2] add missing remove_const

---
 .../CGAL/Polygon_mesh_processing/remesh_planar_patches.h    | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h
index 03171af70bcd..48ca74ba2652 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h
@@ -304,7 +304,7 @@ mark_constrained_edges(
   double coplanar_cos_threshold,
   const VertexPointMap& vpm)
 {
-  for(typename boost::graph_traits<TriangleMesh>::edge_descriptor e : edges(tm))
+  for(typename boost::graph_traits<std::remove_const_t<TriangleMesh>>::edge_descriptor e : edges(tm))
   {
     if (!get(edge_is_constrained,e))
       if (!is_edge_between_coplanar_faces<Kernel>(e, tm, coplanar_cos_threshold, vpm))
@@ -325,7 +325,7 @@ mark_corner_vertices(
   double coplanar_cos_threshold,
   const VertexPointMap& vpm)
 {
-  typedef boost::graph_traits<TriangleMesh> graph_traits;
+  typedef boost::graph_traits<std::remove_const_t<TriangleMesh>> graph_traits;
   std::size_t corner_id = 0;
   for(typename graph_traits::edge_descriptor e : edges(tm))
   {
@@ -553,7 +553,7 @@ tag_corners_and_constrained_edges(TriangleMesh& tm,
                                   FaceCCIdMap& face_cc_ids,
                                   const VertexPointMap& vpm)
 {
-  typedef typename boost::graph_traits<TriangleMesh> graph_traits;
+  typedef typename boost::graph_traits<std::remove_const_t<TriangleMesh>> graph_traits;
   // mark constrained edges
   mark_constrained_edges<Kernel>(tm, edge_is_constrained, coplanar_cos_threshold, vpm);
 

From 63556d4faa3f98af3f0c17cd2ed920f6f489761f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Wed, 6 Dec 2023 15:50:14 +0100
Subject: [PATCH 2/2] use explicitly const meshes

---
 .../Polygon_mesh_processing/remesh_planar_patches.h  | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h
index 48ca74ba2652..33514d6f2deb 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/remesh_planar_patches.h
@@ -299,12 +299,12 @@ template <typename Kernel,
           typename VertexPointMap>
 void
 mark_constrained_edges(
-  TriangleMesh& tm,
+  const TriangleMesh& tm,
   EdgeIsConstrainedMap edge_is_constrained,
   double coplanar_cos_threshold,
   const VertexPointMap& vpm)
 {
-  for(typename boost::graph_traits<std::remove_const_t<TriangleMesh>>::edge_descriptor e : edges(tm))
+  for(typename boost::graph_traits<TriangleMesh>::edge_descriptor e : edges(tm))
   {
     if (!get(edge_is_constrained,e))
       if (!is_edge_between_coplanar_faces<Kernel>(e, tm, coplanar_cos_threshold, vpm))
@@ -319,13 +319,13 @@ template <typename Kernel,
           typename VertexCornerIdMap>
 std::size_t
 mark_corner_vertices(
-  TriangleMesh& tm,
+  const TriangleMesh& tm,
   EdgeIsConstrainedMap& edge_is_constrained,
   VertexCornerIdMap& vertex_corner_id,
   double coplanar_cos_threshold,
   const VertexPointMap& vpm)
 {
-  typedef boost::graph_traits<std::remove_const_t<TriangleMesh>> graph_traits;
+  typedef boost::graph_traits<TriangleMesh> graph_traits;
   std::size_t corner_id = 0;
   for(typename graph_traits::edge_descriptor e : edges(tm))
   {
@@ -546,14 +546,14 @@ template <typename Kernel,
           typename FaceCCIdMap,
           typename VertexPointMap>
 std::pair<std::size_t, std::size_t>
-tag_corners_and_constrained_edges(TriangleMesh& tm,
+tag_corners_and_constrained_edges(const TriangleMesh& tm,
                                   double coplanar_cos_threshold,
                                   VertexCornerIdMap& vertex_corner_id,
                                   EdgeIsConstrainedMap& edge_is_constrained,
                                   FaceCCIdMap& face_cc_ids,
                                   const VertexPointMap& vpm)
 {
-  typedef typename boost::graph_traits<std::remove_const_t<TriangleMesh>> graph_traits;
+  typedef typename boost::graph_traits<TriangleMesh> graph_traits;
   // mark constrained edges
   mark_constrained_edges<Kernel>(tm, edge_is_constrained, coplanar_cos_threshold, vpm);