From f276838a2358754273157540883dd3cecda878cc Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 3 Aug 2018 10:35:43 -0600
Subject: [PATCH] Make an argument a reference.

---
 include/deal.II/grid/grid_generator.h | 2 +-
 source/grid/grid_generator.cc         | 2 +-
 source/grid/grid_generator.inst.in    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/deal.II/grid/grid_generator.h b/include/deal.II/grid/grid_generator.h
index dacbccb7ce..6908b05d85 100644
--- a/include/deal.II/grid/grid_generator.h
+++ b/include/deal.II/grid/grid_generator.h
@@ -1182,7 +1182,7 @@ namespace GridGenerator
   void
   merge_triangulations(
     const std::initializer_list<const Triangulation<dim, spacedim> *const>
-                                  triangulations,
+      &                           triangulations,
     Triangulation<dim, spacedim> &result,
     const double                  duplicated_vertex_tolerance = 1.0e-12,
     const bool                    copy_manifold_ids           = false);
diff --git a/source/grid/grid_generator.cc b/source/grid/grid_generator.cc
index 89aec1b357..a8ad44864c 100644
--- a/source/grid/grid_generator.cc
+++ b/source/grid/grid_generator.cc
@@ -4141,7 +4141,7 @@ namespace GridGenerator
   void
   merge_triangulations(
     const std::initializer_list<const Triangulation<dim, spacedim> *const>
-                                  triangulations,
+      &                           triangulations,
     Triangulation<dim, spacedim> &result,
     const double                  duplicated_vertex_tolerance,
     const bool                    copy_manifold_ids)
diff --git a/source/grid/grid_generator.inst.in b/source/grid/grid_generator.inst.in
index f2111171d1..0084a28512 100644
--- a/source/grid/grid_generator.inst.in
+++ b/source/grid/grid_generator.inst.in
@@ -73,7 +73,7 @@ for (deal_II_dimension : DIMENSIONS; deal_II_space_dimension : SPACE_DIMENSIONS)
       merge_triangulations(
         const std::initializer_list<
           const Triangulation<deal_II_dimension, deal_II_space_dimension>
-            *const>,
+            *const> &,
         Triangulation<deal_II_dimension, deal_II_space_dimension> &,
         const double,
         const bool);
-- 
2.39.5