Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 87 insertions, 0 deletions

diff --git a/include/o3tl/enumrange.hxx b/include/o3tl/enumrange.hxx
new file mode 100644
index 000000000..60f069c9f
--- /dev/null
+++ b/include/o3tl/enumrange.hxx
@@ -0,0 +1,87 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_O3TL_ENUMRANGE_HXX
+#define INCLUDED_O3TL_ENUMRANGE_HXX
+
+namespace o3tl {
+
+///
+/// This is a container convenience class iterating over scoped enumerations.
+///
+/// This assumes that the 'enum class' definition
+///  - starts at zero
+///  - has no holes in its sequence of values
+///  - defines a value called LAST which refers to the greatest constant.
+///
+///  Use like this:
+///     enum class COLOR { RED, GREEN, BLUE, LAST=BLUE };
+///     for( auto e : o3tl::enumrange<Color>() )
+///        ....;
+///
+/// \param T the 'enum class' type.
+template< typename T>
+class enumrange
+{
+public:
+    class Iterator
+    {
+    public:
+        Iterator( int value ) :
+            m_value( value )
+        {
+        }
+
+        T operator*( void ) const
+        {
+            return static_cast<T>(m_value);
+        }
+
+        void operator++( void )
+        {
+            ++m_value;
+        }
+
+        bool operator!=( Iterator rhs ) const
+        {
+            return m_value != rhs.m_value;
+        }
+
+    private:
+        int m_value;
+   };
+};
+
+template< typename T >
+typename enumrange<T>::Iterator begin( enumrange<T> )
+{
+    return typename enumrange<T>::Iterator( int(0) );
+}
+
+template< typename T >
+typename enumrange<T>::Iterator end( enumrange<T> )
+{
+    return typename enumrange<T>::Iterator( static_cast<int>(T::LAST) + 1 );
+}
+
+}; // namespace o3tl
+
+#endif /* INCLUDED_O3TL_ENUMRANGE_HXX */
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */