From 80d7852086016ad3cf190617b47756be5bd4fb5c Mon Sep 17 00:00:00 2001
From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Sat, 25 Aug 2018 19:40:36 +0200
Subject: [PATCH] Don't pass const int by reference

---
 source/lac/lapack_full_matrix.cc | 2 +-
 source/lac/trilinos_solver.cc    | 4 ++--
 source/numerics/data_out.cc      | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/source/lac/lapack_full_matrix.cc b/source/lac/lapack_full_matrix.cc
index d56d0ca9da..933aef006b 100644
--- a/source/lac/lapack_full_matrix.cc
+++ b/source/lac/lapack_full_matrix.cc
@@ -160,7 +160,7 @@ namespace internal
                  std::vector<T> &      real_work,
                  std::vector<T> & /*complex work*/,
                  std::vector<types::blas_int> &integer_work,
-                 const types::blas_int &       work_flag,
+                 const types::blas_int         work_flag,
                  types::blas_int &             info)
     {
       Assert(job == 'A' || job == 'S' || job == 'O' || job == 'N',
diff --git a/source/lac/trilinos_solver.cc b/source/lac/trilinos_solver.cc
index eae22fd400..5354c9df2b 100644
--- a/source/lac/trilinos_solver.cc
+++ b/source/lac/trilinos_solver.cc
@@ -296,7 +296,7 @@ namespace TrilinosWrappers
       class TrilinosReductionControl : public AztecOO_StatusTest
       {
       public:
-        TrilinosReductionControl(const int &                 max_steps,
+        TrilinosReductionControl(const int                   max_steps,
                                  const double &              tolerance,
                                  const double &              reduction,
                                  const Epetra_LinearProblem &linear_problem);
@@ -364,7 +364,7 @@ namespace TrilinosWrappers
 
 
       TrilinosReductionControl::TrilinosReductionControl(
-        const int &                 max_steps,
+        const int                   max_steps,
         const double &              tolerance,
         const double &              reduction,
         const Epetra_LinearProblem &linear_problem)
diff --git a/source/numerics/data_out.cc b/source/numerics/data_out.cc
index 03fe3202bf..0786356d96 100644
--- a/source/numerics/data_out.cc
+++ b/source/numerics/data_out.cc
@@ -589,7 +589,7 @@ DataOut<dim, DoFHandlerType>::build_patches(
                 n_subdivisions,
                 curved_cell_region),
       // no copy-local-to-global function needed here
-      std::function<void(const int &)>(),
+      std::function<void(const int)>(),
       thread_data,
       /* dummy CopyData object = */ 0,
       // experimenting shows that we can make things run a bit
-- 
2.39.5