From f7eaa277d717c65d2688b6db05c1b3201e3bd15a Mon Sep 17 00:00:00 2001
From: Luca Heltai <luca.heltai@unipi.it>
Date: Mon, 12 Aug 2024 15:25:57 -0600
Subject: [PATCH] Custom enums.

---
 tests/parameter_handler/pattern_tools_15.cc   | 56 +++++++++++++++++++
 ...ttern_tools_15.with_magic_enum=true.output |  5 ++
 2 files changed, 61 insertions(+)
 create mode 100644 tests/parameter_handler/pattern_tools_15.cc
 create mode 100644 tests/parameter_handler/pattern_tools_15.with_magic_enum=true.output

diff --git a/tests/parameter_handler/pattern_tools_15.cc b/tests/parameter_handler/pattern_tools_15.cc
new file mode 100644
index 0000000000..9c77ba559e
--- /dev/null
+++ b/tests/parameter_handler/pattern_tools_15.cc
@@ -0,0 +1,56 @@
+// ------------------------------------------------------------------------
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+// Copyright (C) 2010 - 2022 by the deal.II authors
+//
+// This file is part of the deal.II library.
+//
+// Part of the source code is dual licensed under Apache-2.0 WITH
+// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
+// governing the source code and code contributions can be found in
+// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
+//
+// ------------------------------------------------------------------------
+
+// Check Patterns::Tools::Convert for custom enum types
+
+#include <deal.II/fe/fe_values.h>
+
+#include <memory>
+
+#include "../tests.h"
+
+enum TestFlag
+{
+  red   = 1,
+  green = 2,
+  blue  = 4
+};
+
+enum class TestFlagClass
+{
+  yellow = 1,
+  orange = 2,
+  white  = 4
+};
+
+template <typename T>
+using C = Patterns::Tools::Convert<T>;
+
+int
+main()
+{
+  initlog();
+  {
+    TestFlag flags = red;
+    deallog << C<TestFlag>::to_string(flags) << std::endl;
+    flags = C<TestFlag>::to_value("green|blue");
+    deallog << C<TestFlag>::to_string(flags) << std::endl;
+  }
+  {
+    TestFlagClass flags = TestFlagClass::yellow;
+    deallog << C<TestFlagClass>::to_string(flags) << std::endl;
+    flags = C<TestFlagClass>::to_value("orange|white");
+    deallog << C<TestFlagClass>::to_string(flags) << std::endl;
+  }
+}
diff --git a/tests/parameter_handler/pattern_tools_15.with_magic_enum=true.output b/tests/parameter_handler/pattern_tools_15.with_magic_enum=true.output
new file mode 100644
index 0000000000..5b15e1097c
--- /dev/null
+++ b/tests/parameter_handler/pattern_tools_15.with_magic_enum=true.output
@@ -0,0 +1,5 @@
+
+DEAL::red
+DEAL::green| blue
+DEAL::yellow
+DEAL::orange| white
-- 
2.39.5