small changes

.clang-tidy

@@ -9,6 +9,7 @@ Checks: >
   cppcoreguidelines-*,
   -cppcoreguidelines-avoid-const-or-ref-data-members,
   -cppcoreguidelines-non-private-member-variables-in-classes,
+  -cppcoreguidelines-avoid-magic-numbers,
   hicpp-*,
   misc-*,
   -misc-non-private-member-variables-in-classes,
@@ -19,5 +20,6 @@ Checks: >
   readability-*,
   -readability-else-after-return,
   -readability-identifier-length,
+  -readability-magic-numbers,
 
 WarningsAsErrors: '*'

applications/multigrid_test/custom_PDE.h

@@ -0,0 +1,20 @@
+#include <core/matrix_free_operator.h>
+
+using namespace dealii;
+
+/**
+ * \brief This is a derived class of `matrixFreeOperator` where the user implements their
+ * PDEs.
+ *
+ * \tparam dim The number of dimensions in the problem.
+ * \tparam degree The polynomial degree of the shape functions.
+ * \tparam number Datatype to use. Either double or float.
+ */
+template <int dim, int degree, typename number>
+class customPDE : public matrixFreeOperator<dim, degree, number>
+{
+  /**
+   * \brief Constructor.
+   */
+  customPDE();
+};

include/core/temp_test.h

@@ -115,7 +115,7 @@ LaplaceProblem<dim>::setup_system()
   setup_time += time.wall_time();
   conditionalOStreams::pout_base << "Distribute DoFs & B.C.     (CPU/wall) "
                                  << time.cpu_time() << "s/" << time.wall_time() << 's'
-                                 << std::endl;
+                                 << '\n';
   time.restart();
   {
     {
@@ -140,7 +140,7 @@ LaplaceProblem<dim>::setup_system()
   setup_time += time.wall_time();
   conditionalOStreams::pout_base << "Setup matrix-free system   (CPU/wall) "
                                  << time.cpu_time() << "s/" << time.wall_time() << 's'
-                                 << std::endl;
+                                 << '\n';
   time.restart();
 
   {
@@ -184,7 +184,7 @@ LaplaceProblem<dim>::setup_system()
   setup_time += time.wall_time();
   conditionalOStreams::pout_base << "Setup matrix-free levels   (CPU/wall) "
                                  << time.cpu_time() << "s/" << time.wall_time() << 's'
-                                 << std::endl;
+                                 << '\n';
 }
 
 template <int dim>
@@ -211,7 +211,7 @@ LaplaceProblem<dim>::assemble_rhs()
   setup_time += time.wall_time();
   conditionalOStreams::pout_base << "Assemble right hand side   (CPU/wall) "
                                  << time.cpu_time() << "s/" << time.wall_time() << 's'
-                                 << std::endl;
+                                 << '\n';
 }
 
 template <int dim>
@@ -336,8 +336,7 @@ LaplaceProblem<dim>::run()
 
     conditionalOStreams::pout_base
       << "Vectorization over " << n_vect_doubles << " doubles = " << n_vect_bits
-      << " bits (" << Utilities::System::get_current_vectorization_level() << ')'
-      << std::endl;
+      << " bits (" << Utilities::System::get_current_vectorization_level() << ')' << '\n';
   }
 
   GridGenerator::hyper_cube(triangulation, 0.0, 1.0);