From 8fb42c93741aaceada016707458ea57a89029d83 Mon Sep 17 00:00:00 2001
From: David Schneider <david.schneider@ipvs.uni-stuttgart.de>
Date: Mon, 17 Apr 2023 11:06:22 +0200
Subject: [PATCH] Update deprecated deal.II function `extract_boundary_dofs()`

---
 coupled_laplace_problem/coupled_laplace_problem.cc | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/coupled_laplace_problem/coupled_laplace_problem.cc b/coupled_laplace_problem/coupled_laplace_problem.cc
index e295a18..1330bec 100644
--- a/coupled_laplace_problem/coupled_laplace_problem.cc
+++ b/coupled_laplace_problem/coupled_laplace_problem.cc
@@ -177,10 +177,9 @@ Adapter<dim, ParameterClass>::initialize(
 
   // The `ComponentMask()` might be important in case we deal with vector valued
   // problems, because vector valued problems have a DoF for each component.
-  DoFTools::extract_boundary_dofs(dof_handler,
-                                  ComponentMask(),
-                                  coupling_dofs,
-                                  couplingBoundary);
+  coupling_dofs = DoFTools::extract_boundary_dofs(dof_handler,
+                                                  ComponentMask(),
+                                                  couplingBoundary);
 
   // The coupling DoFs are used to set up the `boundary_data` map. At the end,
   // we associate here each DoF with a respective boundary value.
-- 
2.39.5