1 files changed, 29 insertions, 0 deletions
diff --git a/include/o3tl/underlyingenumvalue.hxx b/include/o3tl/underlyingenumvalue.hxx
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+++ b/include/o3tl/underlyingenumvalue.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_O3TL_UNDERLYINGENUMVALUE_HXX
+#define INCLUDED_O3TL_UNDERLYINGENUMVALUE_HXX
+
+#include <sal/config.h>
+
+#include <type_traits>
+
+namespace o3tl
+{
+// An implementation of C++23 std::to_underlying
+// For a value e of an enumeration type T, return the corresponding value of T's underlying type:
+template <typename T> constexpr std::underlying_type_t<T> to_underlying(T e)
+{
+    return static_cast<std::underlying_type_t<T>>(e);
+}
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */