From fa6fa8bb7912c46a1bfa8c51dd7180bd0105735a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mael=20Rouxel-Labb=C3=A9?=
 <mael.rouxel.labbe@geometryfactory.com>
Date: Fri, 24 Jan 2020 18:33:10 +0100
Subject: [PATCH] Put some const& around named parameters

---
 .../include/CGAL/Polygon_mesh_processing/distance.h         | 2 +-
 .../include/CGAL/Polygon_mesh_processing/intersection.h     | 6 +++---
 Polyhedron/include/CGAL/IO/Polyhedron_iostream.h            | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h
index ee5e3c2e9bc..24a1a7b98e2 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/distance.h
@@ -320,7 +320,7 @@ template<class OutputIterator, class TriangleMesh, class NamedParameters>
 OutputIterator
 sample_triangle_mesh(const TriangleMesh& tm,
                            OutputIterator out,
-                           NamedParameters np)
+                     const NamedParameters& np)
 {
   typedef typename GetGeomTraits<TriangleMesh,
           NamedParameters>::type Geom_traits;
diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/intersection.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/intersection.h
index 0d036f3522f..5da01ae5bf4 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/intersection.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/intersection.h
@@ -1585,8 +1585,8 @@ template <class TriangleMeshRange,
           class NamedParametersRange>
 OutputIterator intersecting_meshes(const TriangleMeshRange& range,
                                          OutputIterator out,
-                                         NamedParameters np,
-                                         NamedParametersRange nps)
+                                   const NamedParameters& np,
+                                   const NamedParametersRange& nps)
 {
   using parameters::choose_parameter;
   using parameters::get_parameter;
@@ -1625,7 +1625,7 @@ OutputIterator intersecting_meshes(const TriangleMeshRange& range,
 template <class TriangleMeshRange, class NamedParameters, class OutputIterator>
 OutputIterator intersecting_meshes(const TriangleMeshRange& range,
                                          OutputIterator out,
-                                         NamedParameters np)
+                                   const NamedParameters& np)
 {
   std::vector<Named_function_parameters<bool, internal_np::all_default_t> >nps(
     std::distance(range.begin(), range.end()), parameters::all_default());
diff --git a/Polyhedron/include/CGAL/IO/Polyhedron_iostream.h b/Polyhedron/include/CGAL/IO/Polyhedron_iostream.h
index b843afd88e0..a682e8596ec 100644
--- a/Polyhedron/include/CGAL/IO/Polyhedron_iostream.h
+++ b/Polyhedron/include/CGAL/IO/Polyhedron_iostream.h
@@ -62,7 +62,7 @@ template < class Traits,
 bool 
 read_off(std::istream& in,
          Polyhedron_3<Traits,Items,HDS,Alloc>& P,
-         NamedParameters np) {
+         const NamedParameters& np) {
     // reads a polyhedron from `in' and appends it to P.
     typedef typename CGAL::GetVertexPointMap<Polyhedron_3<Traits,Items,HDS,Alloc>, NamedParameters>::type Vpm;
     using parameters::choose_parameter;