Basic conditional ostream class

include/core/conditional_ostreams.h

@@ -0,0 +1,47 @@
+#ifndef CONDITIONAL_OSTREAMS_H_
+#define CONDITIONAL_OSTREAMS_H_
+
+#include <deal.II/base/conditional_ostream.h>
+#include <deal.II/base/mpi.h>
+
+#include <ostream>
+
+/**
+ * \brief A class that allows printing to different output streams that are classified
+ * based on their verbosity. For now, this consists of two stream the release and debug.
+ * The debug stream provides more information that may be useful when debugging.
+ */
+class conditionalOStreams
+{
+public:
+  /**
+   * \brief Constructor.
+   */
+  conditionalOStreams();
+
+  /**
+   * \brief Generic parallel output stream. Used for essential information in release and
+   * debug mode.
+   */
+  static const dealii::ConditionalOStream pout_base;
+
+  /**
+   * \brief Verbose parallel output stream. Used for additional information in debug mode.
+   */
+  static const dealii::ConditionalOStream pout_verbose;
+};
+
+// NOLINTBEGIN
+const dealii::ConditionalOStream conditionalOStreams::pout_base(
+  std::cout,
+  dealii::Utilities::MPI::this_mpi_process(MPI_COMM_WORLD) == 0);
+
+const dealii::ConditionalOStream conditionalOStreams::pout_verbose(
+  std::cout,
+#ifndef DEBUG
+  false &&
+#endif
+    dealii::Utilities::MPI::this_mpi_process(MPI_COMM_WORLD) == 0);
+// NOLINTEND
+
+#endif