From a0aa755f1822556a985cf70d56f407175a695cc3 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 2 May 2024 23:39:49 +0530
Subject: [PATCH] Be uniform in the order of things we start the assembly loop
 with.

---
 examples/step-20/step-20.cc | 1 +
 examples/step-22/step-22.cc | 1 +
 examples/step-4/step-4.cc   | 1 +
 examples/step-40/step-40.cc | 4 ++--
 examples/step-5/step-5.cc   | 4 ++--
 examples/step-6/step-6.cc   | 4 ++--
 examples/step-7/step-7.cc   | 4 ++--
 examples/step-8/step-8.cc   | 4 ++--
 8 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/examples/step-20/step-20.cc b/examples/step-20/step-20.cc
index d90e8d493d..63285a2705 100644
--- a/examples/step-20/step-20.cc
+++ b/examples/step-20/step-20.cc
@@ -488,6 +488,7 @@ namespace Step20
     for (const auto &cell : dof_handler.active_cell_iterators())
       {
         fe_values.reinit(cell);
+
         local_matrix = 0;
         local_rhs    = 0;
 
diff --git a/examples/step-22/step-22.cc b/examples/step-22/step-22.cc
index 453f322966..bb3b712056 100644
--- a/examples/step-22/step-22.cc
+++ b/examples/step-22/step-22.cc
@@ -659,6 +659,7 @@ namespace Step22
     for (const auto &cell : dof_handler.active_cell_iterators())
       {
         fe_values.reinit(cell);
+
         local_matrix                = 0;
         local_preconditioner_matrix = 0;
         local_rhs                   = 0;
diff --git a/examples/step-4/step-4.cc b/examples/step-4/step-4.cc
index d0e622d7c6..4e3f6c9a24 100644
--- a/examples/step-4/step-4.cc
+++ b/examples/step-4/step-4.cc
@@ -354,6 +354,7 @@ void Step4<dim>::assemble_system()
   for (const auto &cell : dof_handler.active_cell_iterators())
     {
       fe_values.reinit(cell);
+
       cell_matrix = 0;
       cell_rhs    = 0;
 
diff --git a/examples/step-40/step-40.cc b/examples/step-40/step-40.cc
index 622700234b..a0d3e51b67 100644
--- a/examples/step-40/step-40.cc
+++ b/examples/step-40/step-40.cc
@@ -399,11 +399,11 @@ namespace Step40
     for (const auto &cell : dof_handler.active_cell_iterators())
       if (cell->is_locally_owned())
         {
+          fe_values.reinit(cell);
+
           cell_matrix = 0.;
           cell_rhs    = 0.;
 
-          fe_values.reinit(cell);
-
           for (unsigned int q_point = 0; q_point < n_q_points; ++q_point)
             {
               const double rhs_value =
diff --git a/examples/step-5/step-5.cc b/examples/step-5/step-5.cc
index bba78459f6..394e83629d 100644
--- a/examples/step-5/step-5.cc
+++ b/examples/step-5/step-5.cc
@@ -178,11 +178,11 @@ void Step5<dim>::assemble_system()
   // coefficient value at each quadrature point.
   for (const auto &cell : dof_handler.active_cell_iterators())
     {
+      fe_values.reinit(cell);
+
       cell_matrix = 0.;
       cell_rhs    = 0.;
 
-      fe_values.reinit(cell);
-
       for (const unsigned int q_index : fe_values.quadrature_point_indices())
         {
           const double current_coefficient =
diff --git a/examples/step-6/step-6.cc b/examples/step-6/step-6.cc
index 3dd3c7153c..9522232af0 100644
--- a/examples/step-6/step-6.cc
+++ b/examples/step-6/step-6.cc
@@ -271,11 +271,11 @@ void Step6<dim>::assemble_system()
 
   for (const auto &cell : dof_handler.active_cell_iterators())
     {
+      fe_values.reinit(cell);
+
       cell_matrix = 0;
       cell_rhs    = 0;
 
-      fe_values.reinit(cell);
-
       for (const unsigned int q_index : fe_values.quadrature_point_indices())
         {
           const double current_coefficient =
diff --git a/examples/step-7/step-7.cc b/examples/step-7/step-7.cc
index b13c306c5c..5be9442e22 100644
--- a/examples/step-7/step-7.cc
+++ b/examples/step-7/step-7.cc
@@ -583,11 +583,11 @@ namespace Step7
     // previous examples, so we only comment on the things that have changed.
     for (const auto &cell : dof_handler.active_cell_iterators())
       {
+        fe_values.reinit(cell);
+
         cell_matrix = 0.;
         cell_rhs    = 0.;
 
-        fe_values.reinit(cell);
-
         right_hand_side.value_list(fe_values.get_quadrature_points(),
                                    rhs_values);
 
diff --git a/examples/step-8/step-8.cc b/examples/step-8/step-8.cc
index 517f37bda5..f9c29a9480 100644
--- a/examples/step-8/step-8.cc
+++ b/examples/step-8/step-8.cc
@@ -318,11 +318,11 @@ namespace Step8
     // Now we can begin with the loop over all cells:
     for (const auto &cell : dof_handler.active_cell_iterators())
       {
+        fe_values.reinit(cell);
+
         cell_matrix = 0;
         cell_rhs    = 0;
 
-        fe_values.reinit(cell);
-
         // Next we get the values of the coefficients at the quadrature
         // points. Likewise for the right hand side:
         lambda.value_list(fe_values.get_quadrature_points(), lambda_values);
-- 
2.39.5